Release 4.11 drivers/gpu/drm/i915/intel_panel.c

/*
 * Copyright © 2006-2010 Intel Corporation
 * Copyright (c) 2006 Dave Airlie <airlied@linux.ie>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 *
 * Authors:
 *      Eric Anholt <eric@anholt.net>
 *      Dave Airlie <airlied@linux.ie>
 *      Jesse Barnes <jesse.barnes@intel.com>
 *      Chris Wilson <chris@chris-wilson.co.uk>
 */


#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/kernel.h>
#include <linux/moduleparam.h>
#include <linux/pwm.h>
#include "intel_drv.h"


#define CRC_PMIC_PWM_PERIOD_NS	21333


void

intel_fixed_panel_mode(const struct drm_display_mode *fixed_mode,
		       struct drm_display_mode *adjusted_mode)
{
	drm_mode_copy(adjusted_mode, fixed_mode);

	drm_mode_set_crtcinfo(adjusted_mode, 0);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Chris Wilson
18
60.00%
1
33.33%
Imre Deak
7
23.33%
1
33.33%
Ville Syrjälä
5
16.67%
1
33.33%
Total
30
100.00%
3
100.00%

/**
 * intel_find_panel_downclock - find the reduced downclock for LVDS in EDID
 * @dev_priv: i915 device instance
 * @fixed_mode : panel native mode
 * @connector: LVDS/eDP connector
 *
 * Return downclock_avail
 * Find the reduced downclock for LVDS/eDP in EDID.
 */

struct drm_display_mode *

intel_find_panel_downclock(struct drm_i915_private *dev_priv,
			struct drm_display_mode *fixed_mode,
			struct drm_connector *connector)
{
	struct drm_display_mode *scan, *tmp_mode;
	int temp_downclock;

	temp_downclock = fixed_mode->clock;
	tmp_mode = NULL;

	list_for_each_entry(scan, &connector->probed_modes, head) {
		/*
                 * If one mode has the same resolution with the fixed_panel
                 * mode while they have the different refresh rate, it means
                 * that the reduced downclock is found. In such
                 * case we can set the different FPx0/1 to dynamically select
                 * between low and high frequency.
                 */
		if (scan->hdisplay == fixed_mode->hdisplay &&
		    scan->hsync_start == fixed_mode->hsync_start &&
		    scan->hsync_end == fixed_mode->hsync_end &&
		    scan->htotal == fixed_mode->htotal &&
		    scan->vdisplay == fixed_mode->vdisplay &&
		    scan->vsync_start == fixed_mode->vsync_start &&
		    scan->vsync_end == fixed_mode->vsync_end &&
		    scan->vtotal == fixed_mode->vtotal) {
			if (scan->clock < temp_downclock) {
				/*
                                 * The downclock is already found. But we
                                 * expect to find the lower downclock.
                                 */
				temp_downclock = scan->clock;
				tmp_mode = scan;
			}
		}
	}

	if (temp_downclock < fixed_mode->clock)
		return drm_mode_duplicate(&dev_priv->drm, tmp_mode);
	else
		return NULL;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
160
96.39%
1
50.00%
Mika Kahola
6
3.61%
1
50.00%
Total
166
100.00%
2
100.00%

/* adjusted_mode has been preset to be the panel's fixed mode */

void

intel_pch_panel_fitting(struct intel_crtc *intel_crtc,
			struct intel_crtc_state *pipe_config,
			int fitting_mode)
{
	const struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
	int x = 0, y = 0, width = 0, height = 0;

	/* Native modes don't need fitting */
	if (adjusted_mode->crtc_hdisplay == pipe_config->pipe_src_w &&
	    adjusted_mode->crtc_vdisplay == pipe_config->pipe_src_h)
		goto done;

	switch (fitting_mode) {
	case DRM_MODE_SCALE_CENTER:
		width = pipe_config->pipe_src_w;
		height = pipe_config->pipe_src_h;
		x = (adjusted_mode->crtc_hdisplay - width + 1)/2;
		y = (adjusted_mode->crtc_vdisplay - height + 1)/2;
		break;

	case DRM_MODE_SCALE_ASPECT:
		/* Scale but preserve the aspect ratio */
		{
			u32 scaled_width = adjusted_mode->crtc_hdisplay
				* pipe_config->pipe_src_h;
			u32 scaled_height = pipe_config->pipe_src_w
				* adjusted_mode->crtc_vdisplay;
			if (scaled_width > scaled_height) { /* pillar */
				width = scaled_height / pipe_config->pipe_src_h;
				if (width & 1)
					width++;
				x = (adjusted_mode->crtc_hdisplay - width + 1) / 2;
				y = 0;
				height = adjusted_mode->crtc_vdisplay;
			} else if (scaled_width < scaled_height) { /* letter */
				height = scaled_width / pipe_config->pipe_src_w;
				if (height & 1)
				    height++;
				y = (adjusted_mode->crtc_vdisplay - height + 1) / 2;
				x = 0;
				width = adjusted_mode->crtc_hdisplay;
			} else {
				x = y = 0;
				width = adjusted_mode->crtc_hdisplay;
				height = adjusted_mode->crtc_vdisplay;
			}
		}
		break;

	case DRM_MODE_SCALE_FULLSCREEN:
		x = y = 0;
		width = adjusted_mode->crtc_hdisplay;
		height = adjusted_mode->crtc_vdisplay;
		break;

	default:
		WARN(1, "bad panel fit mode: %d\n", fitting_mode);
		return;
	}

done:
	pipe_config->pch_pfit.pos = (x << 16) | y;
	pipe_config->pch_pfit.size = (width << 16) | height;
	pipe_config->pch_pfit.enabled = pipe_config->pch_pfit.size != 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Chris Wilson
251
72.13%
2
20.00%
Ville Syrjälä
45
12.93%
3
30.00%
Jesse Barnes
31
8.91%
2
20.00%
Adam Jackson
18
5.17%
1
10.00%
Ander Conselvan de Oliveira
3
0.86%
2
20.00%
Total
348
100.00%
10
100.00%


static void

centre_horizontally(struct drm_display_mode *adjusted_mode,
		    int width)
{
	u32 border, sync_pos, blank_width, sync_width;

	/* keep the hsync and hblank widths constant */
	sync_width = adjusted_mode->crtc_hsync_end - adjusted_mode->crtc_hsync_start;
	blank_width = adjusted_mode->crtc_hblank_end - adjusted_mode->crtc_hblank_start;
	sync_pos = (blank_width - sync_width + 1) / 2;

	border = (adjusted_mode->crtc_hdisplay - width + 1) / 2;
	border += border & 1; /* make the border even */

	adjusted_mode->crtc_hdisplay = width;
	adjusted_mode->crtc_hblank_start = width + border;
	adjusted_mode->crtc_hblank_end = adjusted_mode->crtc_hblank_start + blank_width;

	adjusted_mode->crtc_hsync_start = adjusted_mode->crtc_hblank_start + sync_pos;
	adjusted_mode->crtc_hsync_end = adjusted_mode->crtc_hsync_start + sync_width;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jesse Barnes
106
87.60%
1
33.33%
Ville Syrjälä
15
12.40%
2
66.67%
Total
121
100.00%
3
100.00%


static void

centre_vertically(struct drm_display_mode *adjusted_mode,
		  int height)
{
	u32 border, sync_pos, blank_width, sync_width;

	/* keep the vsync and vblank widths constant */
	sync_width = adjusted_mode->crtc_vsync_end - adjusted_mode->crtc_vsync_start;
	blank_width = adjusted_mode->crtc_vblank_end - adjusted_mode->crtc_vblank_start;
	sync_pos = (blank_width - sync_width + 1) / 2;

	border = (adjusted_mode->crtc_vdisplay - height + 1) / 2;

	adjusted_mode->crtc_vdisplay = height;
	adjusted_mode->crtc_vblank_start = height + border;
	adjusted_mode->crtc_vblank_end = adjusted_mode->crtc_vblank_start + blank_width;

	adjusted_mode->crtc_vsync_start = adjusted_mode->crtc_vblank_start + sync_pos;
	adjusted_mode->crtc_vsync_end = adjusted_mode->crtc_vsync_start + sync_width;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jesse Barnes
99
86.84%
1
33.33%
Ville Syrjälä
15
13.16%
2
66.67%
Total
114
100.00%
3
100.00%



static inline u32 panel_fitter_scaling(u32 source, u32 target)
{
	/*
         * Floating point operation is not supported. So the FACTOR
         * is defined, which can avoid the floating point computation
         * when calculating the panel ratio.
         */

#define ACCURACY 12

#define FACTOR (1 << ACCURACY)
	u32 ratio = source * FACTOR / target;
	return (FACTOR * ratio + FACTOR/2) / FACTOR;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jesse Barnes
44
100.00%
1
100.00%
Total
44
100.00%
1
100.00%



static void i965_scale_aspect(struct intel_crtc_state *pipe_config,
			      u32 *pfit_control)
{
	const struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
	u32 scaled_width = adjusted_mode->crtc_hdisplay *
		pipe_config->pipe_src_h;
	u32 scaled_height = pipe_config->pipe_src_w *
		adjusted_mode->crtc_vdisplay;

	/* 965+ is easy, it does everything in hw */
	if (scaled_width > scaled_height)
		*pfit_control |= PFIT_ENABLE |
			PFIT_SCALING_PILLAR;
	else if (scaled_width < scaled_height)
		*pfit_control |= PFIT_ENABLE |
			PFIT_SCALING_LETTER;
	else if (adjusted_mode->crtc_hdisplay != pipe_config->pipe_src_w)
		*pfit_control |= PFIT_ENABLE | PFIT_SCALING_AUTO;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jesse Barnes
73
76.04%
1
14.29%
Daniel Vetter
10
10.42%
1
14.29%
Ville Syrjälä
10
10.42%
3
42.86%
Ander Conselvan de Oliveira
3
3.12%
2
28.57%
Total
96
100.00%
7
100.00%



static void i9xx_scale_aspect(struct intel_crtc_state *pipe_config,
			      u32 *pfit_control, u32 *pfit_pgm_ratios,
			      u32 *border)
{
	struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;
	u32 scaled_width = adjusted_mode->crtc_hdisplay *
		pipe_config->pipe_src_h;
	u32 scaled_height = pipe_config->pipe_src_w *
		adjusted_mode->crtc_vdisplay;
	u32 bits;

	/*
         * For earlier chips we have to calculate the scaling
         * ratio by hand and program it into the
         * PFIT_PGM_RATIO register
         */
	if (scaled_width > scaled_height) { /* pillar */
		centre_horizontally(adjusted_mode,
				    scaled_height /
				    pipe_config->pipe_src_h);

		*border = LVDS_BORDER_ENABLE;
		if (pipe_config->pipe_src_h != adjusted_mode->crtc_vdisplay) {
			bits = panel_fitter_scaling(pipe_config->pipe_src_h,
						    adjusted_mode->crtc_vdisplay);

			*pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT |
					     bits << PFIT_VERT_SCALE_SHIFT);
			*pfit_control |= (PFIT_ENABLE |
					  VERT_INTERP_BILINEAR |
					  HORIZ_INTERP_BILINEAR);
		}
	} else if (scaled_width < scaled_height) { /* letter */
		centre_vertically(adjusted_mode,
				  scaled_width /
				  pipe_config->pipe_src_w);

		*border = LVDS_BORDER_ENABLE;
		if (pipe_config->pipe_src_w != adjusted_mode->crtc_hdisplay) {
			bits = panel_fitter_scaling(pipe_config->pipe_src_w,
						    adjusted_mode->crtc_hdisplay);

			*pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT |
					     bits << PFIT_VERT_SCALE_SHIFT);
			*pfit_control |= (PFIT_ENABLE |
					  VERT_INTERP_BILINEAR |
					  HORIZ_INTERP_BILINEAR);
		}
	} else {
		/* Aspects match, Let hw scale both directions */
		*pfit_control |= (PFIT_ENABLE |
				  VERT_AUTO_SCALE | HORIZ_AUTO_SCALE |
				  VERT_INTERP_BILINEAR |
				  HORIZ_INTERP_BILINEAR);
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jesse Barnes
159
69.43%
1
16.67%
Daniel Vetter
45
19.65%
1
16.67%
Ville Syrjälä
22
9.61%
2
33.33%
Ander Conselvan de Oliveira
3
1.31%
2
33.33%
Total
229
100.00%
6
100.00%



void intel_gmch_panel_fitting(struct intel_crtc *intel_crtc,
			      struct intel_crtc_state *pipe_config,
			      int fitting_mode)
{
	struct drm_i915_private *dev_priv = to_i915(intel_crtc->base.dev);
	u32 pfit_control = 0, pfit_pgm_ratios = 0, border = 0;
	struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode;

	/* Native modes don't need fitting */
	if (adjusted_mode->crtc_hdisplay == pipe_config->pipe_src_w &&
	    adjusted_mode->crtc_vdisplay == pipe_config->pipe_src_h)
		goto out;

	switch (fitting_mode) {
	case DRM_MODE_SCALE_CENTER:
		/*
                 * For centered modes, we have to calculate border widths &
                 * heights and modify the values programmed into the CRTC.
                 */
		centre_horizontally(adjusted_mode, pipe_config->pipe_src_w);
		centre_vertically(adjusted_mode, pipe_config->pipe_src_h);
		border = LVDS_BORDER_ENABLE;
		break;
	case DRM_MODE_SCALE_ASPECT:
		/* Scale but preserve the aspect ratio */
		if (INTEL_GEN(dev_priv) >= 4)
			i965_scale_aspect(pipe_config, &pfit_control);
		else
			i9xx_scale_aspect(pipe_config, &pfit_control,
					  &pfit_pgm_ratios, &border);
		break;
	case DRM_MODE_SCALE_FULLSCREEN:
		/*
                 * Full scaling, even if it changes the aspect ratio.
                 * Fortunately this is all done for us in hw.
                 */
		if (pipe_config->pipe_src_h != adjusted_mode->crtc_vdisplay ||
		    pipe_config->pipe_src_w != adjusted_mode->crtc_hdisplay) {
			pfit_control |= PFIT_ENABLE;
			if (INTEL_GEN(dev_priv) >= 4)
				pfit_control |= PFIT_SCALING_AUTO;
			else
				pfit_control |= (VERT_AUTO_SCALE |
						 VERT_INTERP_BILINEAR |
						 HORIZ_AUTO_SCALE |
						 HORIZ_INTERP_BILINEAR);
		}
		break;
	default:
		WARN(1, "bad panel fit mode: %d\n", fitting_mode);
		return;
	}

	/* 965+ wants fuzzy fitting */
	/* FIXME: handle multiple panels by failing gracefully */
	if (INTEL_GEN(dev_priv) >= 4)
		pfit_control |= ((intel_crtc->pipe << PFIT_PIPE_SHIFT) |
				 PFIT_FILTER_FUZZY);

out:
	if ((pfit_control & PFIT_ENABLE) == 0) {
		pfit_control = 0;
		pfit_pgm_ratios = 0;
	}

	/* Make sure pre-965 set dither correctly for 18bpp panels. */
	if (INTEL_GEN(dev_priv) < 4 && pipe_config->pipe_bpp == 18)
		pfit_control |= PANEL_8TO6_DITHER_ENABLE;

	pipe_config->gmch_pfit.control = pfit_control;
	pipe_config->gmch_pfit.pgm_ratios = pfit_pgm_ratios;
	pipe_config->gmch_pfit.lvds_border_bits = border;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Daniel Vetter
175
57.19%
4
30.77%
Jesse Barnes
105
34.31%
3
23.08%
Tvrtko A. Ursulin
13
4.25%
1
7.69%
Ville Syrjälä
10
3.27%
3
23.08%
Ander Conselvan de Oliveira
3
0.98%
2
15.38%
Total
306
100.00%
13
100.00%


enum drm_connector_status

intel_panel_detect(struct drm_i915_private *dev_priv)
{
	/* Assume that the BIOS does not lie through the OpRegion... */
	if (!i915.panel_ignore_lid && dev_priv->opregion.lid_state) {
		return *dev_priv->opregion.lid_state & 0x1 ?
			connector_status_connected :
			connector_status_disconnected;
	}

	switch (i915.panel_ignore_lid) {
	case -2:
		return connector_status_connected;
	case -1:
		return connector_status_disconnected;
	default:
		return connector_status_unknown;
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
64
95.52%
1
33.33%
Mika Kahola
2
2.99%
1
33.33%
Dan J Williams
1
1.49%
1
33.33%
Total
67
100.00%
3
100.00%

/**
 * scale - scale values from one range to another
 *
 * @source_val: value in range [@source_min..@source_max]
 *
 * Return @source_val in range [@source_min..@source_max] scaled to range
 * [@target_min..@target_max].
 */


static uint32_t scale(uint32_t source_val,
		      uint32_t source_min, uint32_t source_max,
		      uint32_t target_min, uint32_t target_max)
{
	uint64_t target_val;

	WARN_ON(source_min > source_max);
	WARN_ON(target_min > target_max);

	/* defensive */
	source_val = clamp(source_val, source_min, source_max);

	/* avoid overflows */
	target_val = DIV_ROUND_CLOSEST_ULL((uint64_t)(source_val - source_min) *
			(target_max - target_min), source_max - source_min);
	target_val += target_min;

	return target_val;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
80
97.56%
1
50.00%
U. Artie Eoff
2
2.44%
1
50.00%
Total
82
100.00%
2
100.00%

/* Scale user_level in range [0..user_max] to [hw_min..hw_max]. */


static inline u32 scale_user_to_hw(struct intel_connector *connector,
				   u32 user_level, u32 user_max)
{
	struct intel_panel *panel = &connector->panel;

	return scale(user_level, 0, user_max,
		     panel->backlight.min, panel->backlight.max);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
50
100.00%
1
100.00%
Total
50
100.00%
1
100.00%

/* Scale user_level in range [0..user_max] to [0..hw_max], clamping the result
 * to [hw_min..hw_max]. */


static inline u32 clamp_user_to_hw(struct intel_connector *connector,
				   u32 user_level, u32 user_max)
{
	struct intel_panel *panel = &connector->panel;
	u32 hw_level;

	hw_level = scale(user_level, 0, user_max, 0, panel->backlight.max);
	hw_level = clamp(hw_level, panel->backlight.min, panel->backlight.max);

	return hw_level;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
72
100.00%
1
100.00%
Total
72
100.00%
1
100.00%

/* Scale hw_level in range [hw_min..hw_max] to [0..user_max]. */


static inline u32 scale_hw_to_user(struct intel_connector *connector,
				   u32 hw_level, u32 user_max)
{
	struct intel_panel *panel = &connector->panel;

	return scale(hw_level, panel->backlight.min, panel->backlight.max,
		     0, user_max);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
50
100.00%
1
100.00%
Total
50
100.00%
1
100.00%



static u32 intel_panel_compute_brightness(struct intel_connector *connector,
					  u32 val)
{
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	struct intel_panel *panel = &connector->panel;

	WARN_ON(panel->backlight.max == 0);

	if (i915.invert_brightness < 0)
		return val;

	if (i915.invert_brightness > 0 ||
	    dev_priv->quirks & QUIRK_INVERT_BRIGHTNESS) {
		return panel->backlight.max - val;
	}

	return val;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
49
55.68%
5
62.50%
Carsten Emde
38
43.18%
2
25.00%
Jesse Barnes
1
1.14%
1
12.50%
Total
88
100.00%
8
100.00%



static u32 lpt_get_backlight(struct intel_connector *connector)
{
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);

	return I915_READ(BLC_PWM_PCH_CTL2) & BACKLIGHT_DUTY_CYCLE_MASK;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Daniel Vetter
20
60.61%
1
25.00%
Takashi Iwai
7
21.21%
1
25.00%
Jani Nikula
6
18.18%
2
50.00%
Total
33
100.00%
4
100.00%



static u32 pch_get_backlight(struct intel_connector *connector)
{
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);

	return I915_READ(BLC_PWM_CPU_CTL) & BACKLIGHT_DUTY_CYCLE_MASK;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
19
57.58%
2
50.00%
Chris Wilson
13
39.39%
1
25.00%
Stéphane Marchesin
1
3.03%
1
25.00%
Total
33
100.00%
4
100.00%



static u32 i9xx_get_backlight(struct intel_connector *connector)
{
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	struct intel_panel *panel = &connector->panel;
	u32 val;

	val = I915_READ(BLC_PWM_CTL) & BACKLIGHT_DUTY_CYCLE_MASK;
	if (INTEL_INFO(dev_priv)->gen < 4)
		val >>= 1;

	if (panel->backlight.combination_mode) {
		u8 lbpc;

		pci_read_config_byte(dev_priv->drm.pdev, LBPC, &lbpc);
		val *= lbpc;
	}

	return val;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
48
50.00%
3
33.33%
Takashi Iwai
21
21.88%
1
11.11%
Chris Wilson
20
20.83%
2
22.22%
Keith Packard
5
5.21%
1
11.11%
Joonas Lahtinen
1
1.04%
1
11.11%
Carsten Emde
1
1.04%
1
11.11%
Total
96
100.00%
9
100.00%



static u32 _vlv_get_backlight(struct drm_i915_private *dev_priv, enum pipe pipe)
{
	if (WARN_ON(pipe != PIPE_A && pipe != PIPE_B))
		return 0;

	return I915_READ(VLV_BLC_PWM_CTL(pipe)) & BACKLIGHT_DUTY_CYCLE_MASK;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
26
61.90%
2
66.67%
Ville Syrjälä
16
38.10%
1
33.33%
Total
42
100.00%
3
100.00%



static u32 vlv_get_backlight(struct intel_connector *connector)
{
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	enum pipe pipe = intel_get_pipe_from_connector(connector);

	return _vlv_get_backlight(dev_priv, pipe);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
39
92.86%
2
50.00%
Carsten Emde
2
4.76%
1
25.00%
Jesse Barnes
1
2.38%
1
25.00%
Total
42
100.00%
4
100.00%



static u32 bxt_get_backlight(struct intel_connector *connector)
{
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	struct intel_panel *panel = &connector->panel;

	return I915_READ(BXT_BLC_PWM_DUTY(panel->backlight.controller));
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Vandana Kannan
26
54.17%
1
33.33%
A.Sunil Kamath
17
35.42%
1
33.33%
Jani Nikula
5
10.42%
1
33.33%
Total
48
100.00%
3
100.00%



static u32 pwm_get_backlight(struct intel_connector *connector)
{
	struct intel_panel *panel = &connector->panel;
	int duty_ns;

	duty_ns = pwm_get_duty_cycle(panel->backlight.pwm);
	return DIV_ROUND_UP(duty_ns * 100, CRC_PMIC_PWM_PERIOD_NS);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Shobhit Kumar
45
100.00%
1
100.00%
Total
45
100.00%
1
100.00%



static u32 intel_panel_get_backlight(struct intel_connector *connector)
{
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	struct intel_panel *panel = &connector->panel;
	u32 val = 0;

	mutex_lock(&dev_priv->backlight_lock);

	if (panel->backlight.enabled) {
		val = panel->backlight.get(connector);
		val = intel_panel_compute_brightness(connector, val);
	}

	mutex_unlock(&dev_priv->backlight_lock);

	DRM_DEBUG_DRIVER("get backlight PWM = %d\n", val);
	return val;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
57
59.38%
5
50.00%
Ville Syrjälä
22
22.92%
1
10.00%
Chris Wilson
11
11.46%
1
10.00%
Carsten Emde
3
3.12%
1
10.00%
Daniel Vetter
2
2.08%
1
10.00%
Jesse Barnes
1
1.04%
1
10.00%
Total
96
100.00%
10
100.00%



static void lpt_set_backlight(struct intel_connector *connector, u32 level)
{
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	u32 val = I915_READ(BLC_PWM_PCH_CTL2) & ~BACKLIGHT_DUTY_CYCLE_MASK;
	I915_WRITE(BLC_PWM_PCH_CTL2, val | level);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Daniel Vetter
27
56.25%
1
14.29%
Chris Wilson
11
22.92%
1
14.29%
Jani Nikula
7
14.58%
3
42.86%
Takashi Iwai
2
4.17%
1
14.29%
Jesse Barnes
1
2.08%
1
14.29%
Total
48
100.00%
7
100.00%



static void pch_set_backlight(struct intel_connector *connector, u32 level)
{
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	u32 tmp;

	tmp = I915_READ(BLC_PWM_CPU_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK;
	I915_WRITE(BLC_PWM_CPU_CTL, tmp | level);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Chris Wilson
29
58.00%
1
33.33%
Jani Nikula
21
42.00%
2
66.67%
Total
50
100.00%
3
100.00%



static void i9xx_set_backlight(struct intel_connector *connector, u32 level)
{
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	struct intel_panel *panel = &connector->panel;
	u32 tmp, mask;

	WARN_ON(panel->backlight.max == 0);

	if (panel->backlight.combination_mode) {
		u8 lbpc;

		lbpc = level * 0xfe / panel->backlight.max + 1;
		level /= lbpc;
		pci_write_config_byte(dev_priv->drm.pdev, LBPC, lbpc);
	}

	if (IS_GEN4(dev_priv)) {
		mask = BACKLIGHT_DUTY_CYCLE_MASK;
	} else {
		level <<= 1;
		mask = BACKLIGHT_DUTY_CYCLE_MASK_PNV;
	}

	tmp = I915_READ(BLC_PWM_CTL) & ~mask;
	I915_WRITE(BLC_PWM_CTL, tmp | level);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
84
59.57%
5
41.67%
Takashi Iwai
29
20.57%
2
16.67%
Chris Wilson
15
10.64%
2
16.67%
Jesse Barnes
12
8.51%
2
16.67%
Joonas Lahtinen
1
0.71%
1
8.33%
Total
141
100.00%
12
100.00%



static void vlv_set_backlight(struct intel_connector *connector, u32 level)
{
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	enum pipe pipe = intel_get_pipe_from_connector(connector);
	u32 tmp;

	if (WARN_ON(pipe != PIPE_A && pipe != PIPE_B))
		return;

	tmp = I915_READ(VLV_BLC_PWM_CTL(pipe)) & ~BACKLIGHT_DUTY_CYCLE_MASK;
	I915_WRITE(VLV_BLC_PWM_CTL(pipe), tmp | level);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
47
59.49%
2
50.00%
Chris Wilson
18
22.78%
1
25.00%
Ville Syrjälä
14
17.72%
1
25.00%
Total
79
100.00%
4
100.00%



static void bxt_set_backlight(struct intel_connector *connector, u32 level)
{
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	struct intel_panel *panel = &connector->panel;

	I915_WRITE(BXT_BLC_PWM_DUTY(panel->backlight.controller), level);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Vandana Kannan
29
55.77%
1
33.33%
A.Sunil Kamath
18
34.62%
1
33.33%
Jani Nikula
5
9.62%
1
33.33%
Total
52
100.00%
3
100.00%



static void pwm_set_backlight(struct intel_connector *connector, u32 level)
{
	struct intel_panel *panel = &connector->panel;
	int duty_ns = DIV_ROUND_UP(level * CRC_PMIC_PWM_PERIOD_NS, 100);

	pwm_config(panel->backlight.pwm, duty_ns, CRC_PMIC_PWM_PERIOD_NS);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Shobhit Kumar
49
100.00%
1
100.00%
Total
49
100.00%
1
100.00%


static void

intel_panel_actually_set_backlight(struct intel_connector *connector, u32 level)
{
	struct intel_panel *panel = &connector->panel;

	DRM_DEBUG_DRIVER("set backlight PWM = %d\n", level);

	level = intel_panel_compute_brightness(connector, level);
	panel->backlight.set(connector, level);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
51
100.00%
3
100.00%
Total
51
100.00%
3
100.00%

/* set backlight brightness to level in range [0..max], scaling wrt hw min */


static void intel_panel_set_backlight(struct intel_connector *connector,
				      u32 user_level, u32 user_max)
{
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	struct intel_panel *panel = &connector->panel;
	u32 hw_level;

	if (!panel->backlight.present)
		return;

	mutex_lock(&dev_priv->backlight_lock);

	WARN_ON(panel->backlight.max == 0);

	hw_level = scale_user_to_hw(connector, user_level, user_max);
	panel->backlight.level = hw_level;

	if (panel->backlight.enabled)
		intel_panel_actually_set_backlight(connector, hw_level);

	mutex_unlock(&dev_priv->backlight_lock);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
113
98.26%
3
75.00%
Daniel Vetter
2
1.74%
1
25.00%
Total
115
100.00%
4
100.00%

/* set backlight brightness to level in range [0..max], assuming hw min is
 * respected.
 */


void intel_panel_set_backlight_acpi(struct intel_connector *connector,
				    u32 user_level, u32 user_max)
{
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	struct intel_panel *panel = &connector->panel;
	enum pipe pipe = intel_get_pipe_from_connector(connector);
	u32 hw_level;

	/*
         * INVALID_PIPE may occur during driver init because
         * connection_mutex isn't held across the entire backlight
         * setup + modeset readout, and the BIOS can issue the
         * requests at any time.
         */
	if (!panel->backlight.present || pipe == INVALID_PIPE)
		return;

	mutex_lock(&dev_priv->backlight_lock);

	WARN_ON(panel->backlight.max == 0);

	hw_level = clamp_user_to_hw(connector, user_level, user_max);
	panel->backlight.level = hw_level;

	if (panel->backlight.device)
		panel->backlight.device->props.brightness =
			scale_hw_to_user(connector,
					 panel->backlight.level,
					 panel->backlight.device->props.max_brightness);

	if (panel->backlight.enabled)
		intel_panel_actually_set_backlight(connector, hw_level);

	mutex_unlock(&dev_priv->backlight_lock);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
106
63.47%
9
56.25%
Jesse Barnes
26
15.57%
1
6.25%
Chris Wilson
15
8.98%
1
6.25%
Ville Syrjälä
8
4.79%
2
12.50%
Takashi Iwai
7
4.19%
1
6.25%
Aaron Lu
3
1.80%
1
6.25%
Daniel Vetter
2
1.20%
1
6.25%
Total
167
100.00%
16
100.00%



static void lpt_disable_backlight(struct intel_connector *connector)
{
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	u32 tmp;

	intel_panel_actually_set_backlight(connector, 0);

	/*
         * Although we don't support or enable CPU PWM with LPT/SPT based
         * systems, it may have been enabled prior to loading the
         * driver. Disable to avoid warnings on LCPLL disable.
         *
         * This needs rework if we need to add support for CPU PWM on PCH split
         * platforms.
         */
	tmp = I915_READ(BLC_PWM_CPU_CTL2);
	if (tmp & BLM_PWM_ENABLE) {
		DRM_DEBUG_KMS("cpu backlight was enabled, disabling\n");
		I915_WRITE(BLC_PWM_CPU_CTL2, tmp & ~BLM_PWM_ENABLE);
	}

	tmp = I915_READ(BLC_PWM_PCH_CTL1);
	I915_WRITE(BLC_PWM_PCH_CTL1, tmp & ~BLM_PCH_PWM_ENABLE);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
83
100.00%
3
100.00%
Total
83
100.00%
3
100.00%



static void pch_disable_backlight(struct intel_connector *connector)
{
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	u32 tmp;

	intel_panel_actually_set_backlight(connector, 0);

	tmp = I915_READ(BLC_PWM_CPU_CTL2);
	I915_WRITE(BLC_PWM_CPU_CTL2, tmp & ~BLM_PWM_ENABLE);

	tmp = I915_READ(BLC_PWM_PCH_CTL1);
	I915_WRITE(BLC_PWM_PCH_CTL1, tmp & ~BLM_PCH_PWM_ENABLE);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
46
66.67%
5
62.50%
Jesse Barnes
10
14.49%
1
12.50%
Takashi Iwai
8
11.59%
1
12.50%
Chris Wilson
5
7.25%
1
12.50%
Total
69
100.00%
8
100.00%



static void i9xx_disable_backlight(struct intel_connector *connector)
{
	intel_panel_actually_set_backlight(connector, 0);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
18
100.00%
1
100.00%
Total
18
100.00%
1
100.00%



static void i965_disable_backlight(struct intel_connector *connector)
{
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	u32 tmp;

	intel_panel_actually_set_backlight(connector, 0);

	tmp = I915_READ(BLC_PWM_CTL2);
	I915_WRITE(BLC_PWM_CTL2, tmp & ~BLM_PWM_ENABLE);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
38
73.08%
3
60.00%
Daniel Vetter
12
23.08%
1
20.00%
Jesse Barnes
2
3.85%
1
20.00%
Total
52
100.00%
5
100.00%



static void vlv_disable_backlight(struct intel_connector *connector)
{
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	enum pipe pipe = intel_get_pipe_from_connector(connector);
	u32 tmp;

	if (WARN_ON(pipe != PIPE_A && pipe != PIPE_B))
		return;

	intel_panel_actually_set_backlight(connector, 0);

	tmp = I915_READ(VLV_BLC_PWM_CTL2(pipe));
	I915_WRITE(VLV_BLC_PWM_CTL2(pipe), tmp & ~BLM_PWM_ENABLE);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
55
67.90%
4
57.14%
Ville Syrjälä
14
17.28%
1
14.29%
Paulo Zanoni
11
13.58%
1
14.29%
Chris Wilson
1
1.23%
1
14.29%
Total
81
100.00%
7
100.00%



static void bxt_disable_backlight(struct intel_connector *connector)
{
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	struct intel_panel *panel = &connector->panel;
	u32 tmp, val;

	intel_panel_actually_set_backlight(connector, 0);

	tmp = I915_READ(BXT_BLC_PWM_CTL(panel->backlight.controller));
	I915_WRITE(BXT_BLC_PWM_CTL(panel->backlight.controller),
			tmp & ~BXT_BLC_PWM_ENABLE);

	if (panel->backlight.controller == 1) {
		val = I915_READ(UTIL_PIN_CTL);
		val &= ~UTIL_PIN_ENABLE;
		I915_WRITE(UTIL_PIN_CTL, val);
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
A.Sunil Kamath
59
54.13%
1
33.33%
Vandana Kannan
45
41.28%
1
33.33%
Jani Nikula
5
4.59%
1
33.33%
Total
109
100.00%
3
100.00%



static void pwm_disable_backlight(struct intel_connector *connector)
{
	struct intel_panel *panel = &connector->panel;

	/* Disable the backlight */
	pwm_config(panel->backlight.pwm, 0, CRC_PMIC_PWM_PERIOD_NS);
	usleep_range(2000, 3000);
	pwm_disable(panel->backlight.pwm);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Shobhit Kumar
51
100.00%
1
100.00%
Total
51
100.00%
1
100.00%



void intel_panel_disable_backlight(struct intel_connector *connector)
{
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	struct intel_panel *panel = &connector->panel;

	if (!panel->backlight.present)
		return;

	/*
         * Do not disable backlight on the vga_switcheroo path. When switching
         * away from i915, the other client may depend on i915 to handle the
         * backlight. This will leave the backlight on unnecessarily when
         * another client is not activated.
         */
	if (dev_priv->drm.switch_power_state == DRM_SWITCH_POWER_CHANGING) {
		DRM_DEBUG_DRIVER("Skipping backlight disable on vga switch\n");
		return;
	}

	mutex_lock(&dev_priv->backlight_lock);

	if (panel->backlight.device)
		panel->backlight.device->props.power = FB_BLANK_POWERDOWN;
	panel->backlight.enabled = false;
	panel->backlight.disable(connector);

	mutex_unlock(&dev_priv->backlight_lock);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
76
65.52%
8
47.06%
Chris Wilson
13
11.21%
3
17.65%
Jesse Barnes
13
11.21%
1
5.88%
Ville Syrjälä
6
5.17%
1
5.88%
Daniel Vetter
5
4.31%
2
11.76%
Damien Lespiau
2
1.72%
1
5.88%
Lukas Wunner
1
0.86%
1
5.88%
Total
116
100.00%
17
100.00%



static void lpt_enable_backlight(struct intel_connector *connector)
{
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	struct intel_panel *panel = &connector->panel;
	u32 pch_ctl1, pch_ctl2, schicken;

	pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1);
	if (pch_ctl1 & BLM_PCH_PWM_ENABLE) {
		DRM_DEBUG_KMS("pch backlight already enabled\n");
		pch_ctl1 &= ~BLM_PCH_PWM_ENABLE;
		I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1);
	}

	if (HAS_PCH_LPT(dev_priv)) {
		schicken = I915_READ(SOUTH_CHICKEN2);
		if (panel->backlight.alternate_pwm_increment)
			schicken |= LPT_PWM_GRANULARITY;
		else
			schicken &= ~LPT_PWM_GRANULARITY;
		I915_WRITE(SOUTH_CHICKEN2, schicken);
	} else {
		schicken = I915_READ(SOUTH_CHICKEN1);
		if (panel->backlight.alternate_pwm_increment)
			schicken |= SPT_PWM_GRANULARITY;
		else
			schicken &= ~SPT_PWM_GRANULARITY;
		I915_WRITE(SOUTH_CHICKEN1, schicken);
	}

	pch_ctl2 = panel->backlight.max << 16;
	I915_WRITE(BLC_PWM_PCH_CTL2, pch_ctl2);

	pch_ctl1 = 0;
	if (panel->backlight.active_low_pwm)
		pch_ctl1 |= BLM_PCH_POLARITY;

	/* After LPT, override is the default. */
	if (HAS_PCH_LPT(dev_priv))
		pch_ctl1 |= BLM_PCH_OVERRIDE_ENABLE;

	I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1);
	POSTING_READ(BLC_PWM_PCH_CTL1);
	I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1 | BLM_PCH_PWM_ENABLE);

	/* This won't stick until the above enable. */
	intel_panel_actually_set_backlight(connector, panel->backlight.level);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Daniel Vetter
112
49.12%
2
20.00%
Shawn C Lee
78
34.21%
1
10.00%
Jani Nikula
17
7.46%
5
50.00%
Ben Widawsky
11
4.82%
1
10.00%
Paulo Zanoni
10
4.39%
1
10.00%
Total
228
100.00%
10
100.00%



static void pch_enable_backlight(struct intel_connector *connector)
{
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	struct intel_panel *panel = &connector->panel;
	enum pipe pipe = intel_get_pipe_from_connector(connector);
	enum transcoder cpu_transcoder =
		intel_pipe_to_cpu_transcoder(dev_priv, pipe);
	u32 cpu_ctl2, pch_ctl1, pch_ctl2;

	cpu_ctl2 = I915_READ(BLC_PWM_CPU_CTL2);
	if (cpu_ctl2 & BLM_PWM_ENABLE) {
		DRM_DEBUG_KMS("cpu backlight already enabled\n");
		cpu_ctl2 &= ~BLM_PWM_ENABLE;
		I915_WRITE(BLC_PWM_CPU_CTL2, cpu_ctl2);
	}

	pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1);
	if (pch_ctl1 & BLM_PCH_PWM_ENABLE) {
		DRM_DEBUG_KMS("pch backlight already enabled\n");
		pch_ctl1 &= ~BLM_PCH_PWM_ENABLE;
		I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1);
	}

	if (cpu_transcoder == TRANSCODER_EDP)
		cpu_ctl2 = BLM_TRANSCODER_EDP;
	else
		cpu_ctl2 = BLM_PIPE(cpu_transcoder);
	I915_WRITE(BLC_PWM_CPU_CTL2, cpu_ctl2);
	POSTING_READ(BLC_PWM_CPU_CTL2);
	I915_WRITE(BLC_PWM_CPU_CTL2, cpu_ctl2 | BLM_PWM_ENABLE);

	/* This won't stick until the above enable. */
	intel_panel_actually_set_backlight(connector, panel->backlight.level);

	pch_ctl2 = panel->backlight.max << 16;
	I915_WRITE(BLC_PWM_PCH_CTL2, pch_ctl2);

	pch_ctl1 = 0;
	if (panel->backlight.active_low_pwm)
		pch_ctl1 |= BLM_PCH_POLARITY;

	I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1);
	POSTING_READ(BLC_PWM_PCH_CTL1);
	I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1 | BLM_PCH_PWM_ENABLE);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
176
76.19%
5
50.00%
Daniel Vetter
37
16.02%
1
10.00%
Paulo Zanoni
10
4.33%
1
10.00%
Jesse Barnes
5
2.16%
1
10.00%
Ben Widawsky
2
0.87%
1
10.00%
Scot Doyle
1
0.43%
1
10.00%
Total
231
100.00%
10
100.00%



static void i9xx_enable_backlight(struct intel_connector *connector)
{
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	struct intel_panel *panel = &connector->panel;
	u32 ctl, freq;

	ctl = I915_READ(BLC_PWM_CTL);
	if (ctl & BACKLIGHT_DUTY_CYCLE_MASK_PNV) {
		DRM_DEBUG_KMS("backlight already enabled\n");
		I915_WRITE(BLC_PWM_CTL, 0);
	}

	freq = panel->backlight.max;
	if (panel->backlight.combination_mode)
		freq /= 0xff;

	ctl = freq << 17;
	if (panel->backlight.combination_mode)
		ctl |= BLM_LEGACY_MODE;
	if (IS_PINEVIEW(dev_priv) && panel->backlight.active_low_pwm)
		ctl |= BLM_POLARITY_PNV;

	I915_WRITE(BLC_PWM_CTL, ctl);
	POSTING_READ(BLC_PWM_CTL);

	/* XXX: combine this into above write? */
	intel_panel_actually_set_backlight(connector, panel->backlight.level);

	/*
         * Needed to enable backlight on some 855gm models. BLC_HIST_CTL is
         * 855gm only, but checking for gen2 is safe, as 855gm is the only gen2
         * that has backlight.
         */
	if (IS_GEN2(dev_priv))
		I915_WRITE(BLC_HIST_CTL, BLM_HISTOGRAM_ENABLE);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
159
98.76%
4
66.67%
Daniel Vetter
1
0.62%
1
16.67%
Scot Doyle
1
0.62%
1
16.67%
Total
161
100.00%
6
100.00%



static void i965_enable_backlight(struct intel_connector *connector)
{
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	struct intel_panel *panel = &connector->panel;
	enum pipe pipe = intel_get_pipe_from_connector(connector);
	u32 ctl, ctl2, freq;

	ctl2 = I915_READ(BLC_PWM_CTL2);
	if (ctl2 & BLM_PWM_ENABLE) {
		DRM_DEBUG_KMS("backlight already enabled\n");
		ctl2 &= ~BLM_PWM_ENABLE;
		I915_WRITE(BLC_PWM_CTL2, ctl2);
	}

	freq = panel->backlight.max;
	if (panel->backlight.combination_mode)
		freq /= 0xff;

	ctl = freq << 16;
	I915_WRITE(BLC_PWM_CTL, ctl);

	ctl2 = BLM_PIPE(pipe);
	if (panel->backlight.combination_mode)
		ctl2 |= BLM_COMBINATION_MODE;
	if (panel->backlight.active_low_pwm)
		ctl2 |= BLM_POLARITY_I965;
	I915_WRITE(BLC_PWM_CTL2, ctl2);
	POSTING_READ(BLC_PWM_CTL2);
	I915_WRITE(BLC_PWM_CTL2, ctl2 | BLM_PWM_ENABLE);

	intel_panel_actually_set_backlight(connector, panel->backlight.level);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
149
83.24%
5
62.50%
Jesse Barnes
29
16.20%
2
25.00%
Scot Doyle
1
0.56%
1
12.50%
Total
179
100.00%
8
100.00%



static void vlv_enable_backlight(struct intel_connector *connector)
{
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	struct intel_panel *panel = &connector->panel;
	enum pipe pipe = intel_get_pipe_from_connector(connector);
	u32 ctl, ctl2;

	if (WARN_ON(pipe != PIPE_A && pipe != PIPE_B))
		return;

	ctl2 = I915_READ(VLV_BLC_PWM_CTL2(pipe));
	if (ctl2 & BLM_PWM_ENABLE) {
		DRM_DEBUG_KMS("backlight already enabled\n");
		ctl2 &= ~BLM_PWM_ENABLE;
		I915_WRITE(VLV_BLC_PWM_CTL2(pipe), ctl2);
	}

	ctl = panel->backlight.max << 16;
	I915_WRITE(VLV_BLC_PWM_CTL(pipe), ctl);

	/* XXX: combine this into above write? */
	intel_panel_actually_set_backlight(connector, panel->backlight.level);

	ctl2 = 0;
	if (panel->backlight.active_low_pwm)
		ctl2 |= BLM_POLARITY_I965;
	I915_WRITE(VLV_BLC_PWM_CTL2(pipe), ctl2);
	POSTING_READ(VLV_BLC_PWM_CTL2(pipe));
	I915_WRITE(VLV_BLC_PWM_CTL2(pipe), ctl2 | BLM_PWM_ENABLE);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
161
89.94%
4
57.14%
Ville Syrjälä
14
7.82%
1
14.29%
Chris Wilson
3
1.68%
1
14.29%
Scot Doyle
1
0.56%
1
14.29%
Total
179
100.00%
7
100.00%



static void bxt_enable_backlight(struct intel_connector *connector)
{
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	struct intel_panel *panel = &connector->panel;
	enum pipe pipe = intel_get_pipe_from_connector(connector);
	u32 pwm_ctl, val;

	/* Controller 1 uses the utility pin. */
	if (panel->backlight.controller == 1) {
		val = I915_READ(UTIL_PIN_CTL);
		if (val & UTIL_PIN_ENABLE) {
			DRM_DEBUG_KMS("util pin already enabled\n");
			val &= ~UTIL_PIN_ENABLE;
			I915_WRITE(UTIL_PIN_CTL, val);
		}

		val = 0;
		if (panel->backlight.util_pin_active_low)
			val |= UTIL_PIN_POLARITY;
		I915_WRITE(UTIL_PIN_CTL, val | UTIL_PIN_PIPE(pipe) |
				UTIL_PIN_MODE_PWM | UTIL_PIN_ENABLE);
	}

	pwm_ctl = I915_READ(BXT_BLC_PWM_CTL(panel->backlight.controller));
	if (pwm_ctl & BXT_BLC_PWM_ENABLE) {
		DRM_DEBUG_KMS("backlight already enabled\n");
		pwm_ctl &= ~BXT_BLC_PWM_ENABLE;
		I915_WRITE(BXT_BLC_PWM_CTL(panel->backlight.controller),
				pwm_ctl);
	}

	I915_WRITE(BXT_BLC_PWM_FREQ(panel->backlight.controller),
			panel->backlight.max);

	intel_panel_actually_set_backlight(connector, panel->backlight.level);

	pwm_ctl = 0;
	if (panel->backlight.active_low_pwm)
		pwm_ctl |= BXT_BLC_PWM_POLARITY;

	I915_WRITE(BXT_BLC_PWM_CTL(panel->backlight.controller), pwm_ctl);
	POSTING_READ(BXT_BLC_PWM_CTL(panel->backlight.controller));
	I915_WRITE(BXT_BLC_PWM_CTL(panel->backlight.controller),
			pwm_ctl | BXT_BLC_PWM_ENABLE);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
A.Sunil Kamath
135
52.12%
1
25.00%
Vandana Kannan
118
45.56%
1
25.00%
Jani Nikula
5
1.93%
1
25.00%
Vidya Srinivas
1
0.39%
1
25.00%
Total
259
100.00%
4
100.00%



static void pwm_enable_backlight(struct intel_connector *connector)
{
	struct intel_panel *panel = &connector->panel;

	pwm_enable(panel->backlight.pwm);
	intel_panel_actually_set_backlight(connector, panel->backlight.level);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Shobhit Kumar
41
100.00%
1
100.00%
Total
41
100.00%
1
100.00%



void intel_panel_enable_backlight(struct intel_connector *connector)
{
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	struct intel_panel *panel = &connector->panel;
	enum pipe pipe = intel_get_pipe_from_connector(connector);

	if (!panel->backlight.present)
		return;

	DRM_DEBUG_KMS("pipe %c\n", pipe_name(pipe));

	mutex_lock(&dev_priv->backlight_lock);

	WARN_ON(panel->backlight.max == 0);

	if (panel->backlight.level <= panel->backlight.min) {
		panel->backlight.level = panel->backlight.max;
		if (panel->backlight.device)
			panel->backlight.device->props.brightness =
				scale_hw_to_user(connector,
						 panel->backlight.level,
						 panel->backlight.device->props.max_brightness);
	}

	panel->backlight.enable(connector);
	panel->backlight.enabled = true;
	if (panel->backlight.device)
		panel->backlight.device->props.power = FB_BLANK_UNBLANK;

	mutex_unlock(&dev_priv->backlight_lock);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
180
92.78%
6
66.67%
Ville Syrjälä
6
3.09%
1
11.11%
Jeremiah Mahler
6
3.09%
1
11.11%
Daniel Vetter
2
1.03%
1
11.11%
Total
194
100.00%
9
100.00%

#if IS_ENABLED(CONFIG_BACKLIGHT_CLASS_DEVICE)


static int intel_backlight_device_update_status(struct backlight_device *bd)
{
	struct intel_connector *connector = bl_get_data(bd);
	struct intel_panel *panel = &connector->panel;
	struct drm_device *dev = connector->base.dev;

	drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);
	DRM_DEBUG_KMS("updating intel_backlight, brightness=%d/%d\n",
		      bd->props.brightness, bd->props.max_brightness);
	intel_panel_set_backlight(connector, bd->props.brightness,
				  bd->props.max_brightness);

	/*
         * Allow flipping bl_power as a sub-state of enabled. Sadly the
         * backlight class device does not make it easy to to differentiate
         * between callbacks for brightness and bl_power, so our backlight_power
         * callback needs to take this into account.
         */
	if (panel->backlight.enabled) {
		if (panel->backlight.power) {
			bool enable = bd->props.power == FB_BLANK_UNBLANK &&
				bd->props.brightness != 0;
			panel->backlight.power(connector, enable);
		}
	} else {
		bd->props.power = FB_BLANK_POWERDOWN;
	}

	drm_modeset_unlock(&dev->mode_config.connection_mutex);
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
79
48.47%
5
50.00%
Matthew Garrett
31
19.02%
1
10.00%
Jesse Barnes
30
18.40%
1
10.00%
Chris Wilson
17
10.43%
1
10.00%
Rob Clark
4
2.45%
1
10.00%
Daniel Vetter
2
1.23%
1
10.00%
Total
163
100.00%
10
100.00%



static int intel_backlight_device_get_brightness(struct backlight_device *bd)
{
	struct intel_connector *connector = bl_get_data(bd);
	struct drm_device *dev = connector->base.dev;
	struct drm_i915_private *dev_priv = to_i915(dev);
	u32 hw_level;
	int ret;

	intel_runtime_pm_get(dev_priv);
	drm_modeset_lock(&dev->mode_config.connection_mutex, NULL);

	hw_level = intel_panel_get_backlight(connector);
	ret = scale_hw_to_user(connector, hw_level, bd->props.max_brightness);

	drm_modeset_unlock(&dev->mode_config.connection_mutex);
	intel_runtime_pm_put(dev_priv);

	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
79
75.24%
2
33.33%
Paulo Zanoni
17
16.19%
1
16.67%
Rob Clark
4
3.81%
1
16.67%
Chris Wilson
3
2.86%
1
16.67%
Daniel Vetter
2
1.90%
1
16.67%
Total
105
100.00%
6
100.00%


static const struct backlight_ops intel_backlight_device_ops = {
	.update_status = intel_backlight_device_update_status,
	.get_brightness = intel_backlight_device_get_brightness,
};



int intel_backlight_device_register(struct intel_connector *connector)
{
	struct intel_panel *panel = &connector->panel;
	struct backlight_properties props;

	if (WARN_ON(panel->backlight.device))
		return -ENODEV;

	if (!panel->backlight.present)
		return 0;

	WARN_ON(panel->backlight.max == 0);

	memset(&props, 0, sizeof(props));
	props.type = BACKLIGHT_RAW;

	/*
         * Note: Everything should work even if the backlight device max
         * presented to the userspace is arbitrarily chosen.
         */
	props.max_brightness = panel->backlight.max;
	props.brightness = scale_hw_to_user(connector,
					    panel->backlight.level,
					    props.max_brightness);

	if (panel->backlight.enabled)
		props.power = FB_BLANK_UNBLANK;
	else
		props.power = FB_BLANK_POWERDOWN;

	/*
         * Note: using the same name independent of the connector prevents
         * registration of multiple backlight devices in the driver.
         */
	panel->backlight.device =
		backlight_device_register("intel_backlight",
					  connector->base.kdev,
					  connector,
					  &intel_backlight_device_ops, &props);

	if (IS_ERR(panel->backlight.device)) {
		DRM_ERROR("Failed to register backlight: %ld\n",
			  PTR_ERR(panel->backlight.device));
		panel->backlight.device = NULL;
		return -ENODEV;
	}

	DRM_DEBUG_KMS("Connector %s backlight sysfs interface registered\n",
		      connector->base.name);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
188
89.10%
3
75.00%
Ville Syrjälä
23
10.90%
1
25.00%
Total
211
100.00%
4
100.00%



void intel_backlight_device_unregister(struct intel_connector *connector)
{
	struct intel_panel *panel = &connector->panel;

	if (panel->backlight.device) {
		backlight_device_unregister(panel->backlight.device);
		panel->backlight.device = NULL;
	}
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
26
55.32%
1
33.33%
Jesse Barnes
17
36.17%
1
33.33%
Matthew Garrett
4
8.51%
1
33.33%
Total
47
100.00%
3
100.00%

#endif /* CONFIG_BACKLIGHT_CLASS_DEVICE */

/*
 * BXT: PWM clock frequency = 19.2 MHz.
 */


static u32 bxt_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz)
{
	return DIV_ROUND_CLOSEST(KHz(19200), pwm_freq_hz);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
21
84.00%
1
50.00%
Ville Syrjälä
4
16.00%
1
50.00%
Total
25
100.00%
2
100.00%

/*
 * SPT: This value represents the period of the PWM stream in clock periods
 * multiplied by 16 (default increment) or 128 (alternate increment selected in
 * SCHICKEN_1 bit 0). PWM clock is 24 MHz.
 */


static u32 spt_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz)
{
	struct intel_panel *panel = &connector->panel;
	u32 mul;

	if (panel->backlight.alternate_pwm_increment)
		mul = 128;
	else
		mul = 16;

	return DIV_ROUND_CLOSEST(MHz(24), pwm_freq_hz * mul);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
52
91.23%
2
50.00%
Ville Syrjälä
5
8.77%
2
50.00%
Total
57
100.00%
4
100.00%

/*
 * LPT: This value represents the period of the PWM stream in clock periods
 * multiplied by 128 (default increment) or 16 (alternate increment, selected in
 * LPT SOUTH_CHICKEN2 register bit 5).
 */


static u32 lpt_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz)
{
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	struct intel_panel *panel = &connector->panel;
	u32 mul, clock;

	if (panel->backlight.alternate_pwm_increment)
		mul = 16;
	else
		mul = 128;

	if (HAS_PCH_LPT_H(dev_priv))
		clock = MHz(135); /* LPT:H */
	else
		clock = MHz(24); /* LPT:LP */

	return DIV_ROUND_CLOSEST(clock, pwm_freq_hz * mul);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
87
92.55%
3
60.00%
Ville Syrjälä
7
7.45%
2
40.00%
Total
94
100.00%
5
100.00%

/*
 * ILK/SNB/IVB: This value represents the period of the PWM stream in PCH
 * display raw clocks multiplied by 128.
 */


static u32 pch_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz)
{
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);

	return DIV_ROUND_CLOSEST(KHz(dev_priv->rawclk_freq), pwm_freq_hz * 128);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
29
67.44%
1
33.33%
Ville Syrjälä
14
32.56%
2
66.67%
Total
43
100.00%
3
100.00%

/*
 * Gen2: This field determines the number of time base events (display core
 * clock frequency/32) in total for a complete cycle of modulated backlight
 * control.
 *
 * Gen3: A time base event equals the display core clock ([DevPNV] HRAW clock)
 * divided by 32.
 */


static u32 i9xx_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz)
{
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	int clock;

	if (IS_PINEVIEW(dev_priv))
		clock = KHz(dev_priv->rawclk_freq);
	else
		clock = KHz(dev_priv->cdclk_freq);

	return DIV_ROUND_CLOSEST(clock, pwm_freq_hz * 32);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
48
71.64%
1
20.00%
Ville Syrjälä
19
28.36%
4
80.00%
Total
67
100.00%
5
100.00%

/*
 * Gen4: This value represents the period of the PWM stream in display core
 * clocks ([DevCTG] HRAW clocks) multiplied by 128.
 *
 */


static u32 i965_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz)
{
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	int clock;

	if (IS_G4X(dev_priv))
		clock = KHz(dev_priv->rawclk_freq);
	else
		clock = KHz(dev_priv->cdclk_freq);

	return DIV_ROUND_CLOSEST(clock, pwm_freq_hz * 128);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
31
46.27%
1
14.29%
Ville Syrjälä
29
43.28%
4
57.14%
Mika Kahola
4
5.97%
1
14.29%
Chris Wilson
3
4.48%
1
14.29%
Total
67
100.00%
7
100.00%

/*
 * VLV: This value represents the period of the PWM stream in display core
 * clocks ([DevCTG] 200MHz HRAW clocks) multiplied by 128 or 25MHz S0IX clocks
 * multiplied by 16. CHV uses a 19.2MHz S0IX clock.
 */


static u32 vlv_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz)
{
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	int mul, clock;

	if ((I915_READ(CBR1_VLV) & CBR_PWM_CLOCK_MUX_SELECT) == 0) {
		if (IS_CHERRYVIEW(dev_priv))
			clock = KHz(19200);
		else
			clock = MHz(25);
		mul = 16;
	} else {
		clock = KHz(dev_priv->rawclk_freq);
		mul = 128;
	}

	return DIV_ROUND_CLOSEST(clock, pwm_freq_hz * mul);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
69
69.00%
1
33.33%
Ville Syrjälä
31
31.00%
2
66.67%
Total
100
100.00%
3
100.00%



static u32 get_backlight_max_vbt(struct intel_connector *connector)
{
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	struct intel_panel *panel = &connector->panel;
	u16 pwm_freq_hz = dev_priv->vbt.backlight.pwm_freq_hz;
	u32 pwm;

	if (!panel->backlight.hz_to_pwm) {
		DRM_DEBUG_KMS("backlight frequency conversion not supported\n");
		return 0;
	}

	if (pwm_freq_hz) {
		DRM_DEBUG_KMS("VBT defined backlight frequency %u Hz\n",
			      pwm_freq_hz);
	} else {
		pwm_freq_hz = 200;
		DRM_DEBUG_KMS("default backlight frequency %u Hz\n",
			      pwm_freq_hz);
	}

	pwm = panel->backlight.hz_to_pwm(connector, pwm_freq_hz);
	if (!pwm) {
		DRM_DEBUG_KMS("backlight frequency conversion failed\n");
		return 0;
	}

	return pwm;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
126
100.00%
4
100.00%
Total
126
100.00%
4
100.00%

/*
 * Note: The setup hooks can't assume pipe is set!
 */


static u32 get_backlight_min_vbt(struct intel_connector *connector)
{
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	struct intel_panel *panel = &connector->panel;
	int min;

	WARN_ON(panel->backlight.max == 0);

	/*
         * XXX: If the vbt value is 255, it makes min equal to max, which leads
         * to problems. There are such machines out there. Either our
         * interpretation is wrong or the vbt has bogus data. Or both. Safeguard
         * against this by letting the minimum be at most (arbitrarily chosen)
         * 25% of the max.
         */
	min = clamp_t(int, dev_priv->vbt.backlight.min_brightness, 0, 64);
	if (min != dev_priv->vbt.backlight.min_brightness) {
		DRM_DEBUG_KMS("clamping VBT min backlight %d/255 to %d/255\n",
			      dev_priv->vbt.backlight.min_brightness, min);
	}

	/* vbt value is a coefficient in range [0..255] */
	return scale(min, 0, 255, 0, panel->backlight.max);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
117
100.00%
3
100.00%
Total
117
100.00%
3
100.00%



static int lpt_setup_backlight(struct intel_connector *connector, enum pipe unused)
{
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	struct intel_panel *panel = &connector->panel;
	u32 pch_ctl1, pch_ctl2, val;
	bool alt;

	if (HAS_PCH_LPT(dev_priv))
		alt = I915_READ(SOUTH_CHICKEN2) & LPT_PWM_GRANULARITY;
	else
		alt = I915_READ(SOUTH_CHICKEN1) & SPT_PWM_GRANULARITY;
	panel->backlight.alternate_pwm_increment = alt;

	pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1);
	panel->backlight.active_low_pwm = pch_ctl1 & BLM_PCH_POLARITY;

	pch_ctl2 = I915_READ(BLC_PWM_PCH_CTL2);
	panel->backlight.max = pch_ctl2 >> 16;

	if (!panel->backlight.max)
		panel->backlight.max = get_backlight_max_vbt(connector);

	if (!panel->backlight.max)
		return -ENODEV;

	panel->backlight.min = get_backlight_min_vbt(connector);

	val = lpt_get_backlight(connector);
	val = intel_panel_compute_brightness(connector, val);
	panel->backlight.level = clamp(val, panel->backlight.min,
				       panel->backlight.max);

	panel->backlight.enabled = pch_ctl1 & BLM_PCH_PWM_ENABLE;

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Daniel Vetter
112
52.58%
1
12.50%
Jani Nikula
97
45.54%
6
75.00%
Ville Syrjälä
4
1.88%
1
12.50%
Total
213
100.00%
8
100.00%



static int pch_setup_backlight(struct intel_connector *connector, enum pipe unused)
{
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	struct intel_panel *panel = &connector->panel;
	u32 cpu_ctl2, pch_ctl1, pch_ctl2, val;

	pch_ctl1 = I915_READ(BLC_PWM_PCH_CTL1);
	panel->backlight.active_low_pwm = pch_ctl1 & BLM_PCH_POLARITY;

	pch_ctl2 = I915_READ(BLC_PWM_PCH_CTL2);
	panel->backlight.max = pch_ctl2 >> 16;

	if (!panel->backlight.max)
		panel->backlight.max = get_backlight_max_vbt(connector);

	if (!panel->backlight.max)
		return -ENODEV;

	panel->backlight.min = get_backlight_min_vbt(connector);

	val = pch_get_backlight(connector);
	val = intel_panel_compute_brightness(connector, val);
	panel->backlight.level = clamp(val, panel->backlight.min,
				       panel->backlight.max);

	cpu_ctl2 = I915_READ(BLC_PWM_CPU_CTL2);
	panel->backlight.enabled = (cpu_ctl2 & BLM_PWM_ENABLE) &&
		(pch_ctl1 & BLM_PCH_PWM_ENABLE);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
184
95.34%
12
80.00%
Ville Syrjälä
4
2.07%
1
6.67%
Corentin Chary
3
1.55%
1
6.67%
Matthew Garrett
2
1.04%
1
6.67%
Total
193
100.00%
15
100.00%



static int i9xx_setup_backlight(struct intel_connector *connector, enum pipe unused)
{
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	struct intel_panel *panel = &connector->panel;
	u32 ctl, val;

	ctl = I915_READ(BLC_PWM_CTL);

	if (IS_GEN2(dev_priv) || IS_I915GM(dev_priv) || IS_I945GM(dev_priv))
		panel->backlight.combination_mode = ctl & BLM_LEGACY_MODE;

	if (IS_PINEVIEW(dev_priv))
		panel->backlight.active_low_pwm = ctl & BLM_POLARITY_PNV;

	panel->backlight.max = ctl >> 17;

	if (!panel->backlight.max) {
		panel->backlight.max = get_backlight_max_vbt(connector);
		panel->backlight.max >>= 1;
	}

	if (!panel->backlight.max)
		return -ENODEV;

	if (panel->backlight.combination_mode)
		panel->backlight.max *= 0xff;

	panel->backlight.min = get_backlight_min_vbt(connector);

	val = i9xx_get_backlight(connector);
	val = intel_panel_compute_brightness(connector, val);
	panel->backlight.level = clamp(val, panel->backlight.min,
				       panel->backlight.max);

	panel->backlight.enabled = val != 0;

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
219
96.48%
10
83.33%
Ville Syrjälä
4
1.76%
1
8.33%
Matthew Garrett
4
1.76%
1
8.33%
Total
227
100.00%
12
100.00%



static int i965_setup_backlight(struct intel_connector *connector, enum pipe unused)
{
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	struct intel_panel *panel = &connector->panel;
	u32 ctl, ctl2, val;

	ctl2 = I915_READ(BLC_PWM_CTL2);
	panel->backlight.combination_mode = ctl2 & BLM_COMBINATION_MODE;
	panel->backlight.active_low_pwm = ctl2 & BLM_POLARITY_I965;

	ctl = I915_READ(BLC_PWM_CTL);
	panel->backlight.max = ctl >> 16;

	if (!panel->backlight.max)
		panel->backlight.max = get_backlight_max_vbt(connector);

	if (!panel->backlight.max)
		return -ENODEV;

	if (panel->backlight.combination_mode)
		panel->backlight.max *= 0xff;

	panel->backlight.min = get_backlight_min_vbt(connector);

	val = i9xx_get_backlight(connector);
	val = intel_panel_compute_brightness(connector, val);
	panel->backlight.level = clamp(val, panel->backlight.min,
				       panel->backlight.max);

	panel->backlight.enabled = ctl2 & BLM_PWM_ENABLE;

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
178
88.12%
9
81.82%
Matthew Garrett
20
9.90%
1
9.09%
Ville Syrjälä
4
1.98%
1
9.09%
Total
202
100.00%
11
100.00%



static int vlv_setup_backlight(struct intel_connector *connector, enum pipe pipe)
{
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	struct intel_panel *panel = &connector->panel;
	u32 ctl, ctl2, val;

	if (WARN_ON(pipe != PIPE_A && pipe != PIPE_B))
		return -ENODEV;

	ctl2 = I915_READ(VLV_BLC_PWM_CTL2(pipe));
	panel->backlight.active_low_pwm = ctl2 & BLM_POLARITY_I965;

	ctl = I915_READ(VLV_BLC_PWM_CTL(pipe));
	panel->backlight.max = ctl >> 16;

	if (!panel->backlight.max)
		panel->backlight.max = get_backlight_max_vbt(connector);

	if (!panel->backlight.max)
		return -ENODEV;

	panel->backlight.min = get_backlight_min_vbt(connector);

	val = _vlv_get_backlight(dev_priv, pipe);
	val = intel_panel_compute_brightness(connector, val);
	panel->backlight.level = clamp(val, panel->backlight.min,
				       panel->backlight.max);

	panel->backlight.enabled = ctl2 & BLM_PWM_ENABLE;

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
166
82.59%
10
83.33%
Ville Syrjälä
24
11.94%
1
8.33%
Matthew Garrett
11
5.47%
1
8.33%
Total
201
100.00%
12
100.00%


static int

bxt_setup_backlight(struct intel_connector *connector, enum pipe unused)
{
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
	struct intel_panel *panel = &connector->panel;
	u32 pwm_ctl, val;

	panel->backlight.controller = dev_priv->vbt.backlight.controller;

	pwm_ctl = I915_READ(BXT_BLC_PWM_CTL(panel->backlight.controller));

	/* Controller 1 uses the utility pin. */
	if (panel->backlight.controller == 1) {
		val = I915_READ(UTIL_PIN_CTL);
		panel->backlight.util_pin_active_low =
					val & UTIL_PIN_POLARITY;
	}

	panel->backlight.active_low_pwm = pwm_ctl & BXT_BLC_PWM_POLARITY;
	panel->backlight.max =
		I915_READ(BXT_BLC_PWM_FREQ(panel->backlight.controller));

	if (!panel->backlight.max)
		panel->backlight.max = get_backlight_max_vbt(connector);

	if (!panel->backlight.max)
		return -ENODEV;

	val = bxt_get_backlight(connector);
	val = intel_panel_compute_brightness(connector, val);
	panel->backlight.level = clamp(val, panel->backlight.min,
				       panel->backlight.max);

	panel->backlight.enabled = pwm_ctl & BXT_BLC_PWM_ENABLE;

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Vandana Kannan
108
50.23%
1
16.67%
A.Sunil Kamath
52
24.19%
1
16.67%
Jani Nikula
47
21.86%
3
50.00%
Vidya Srinivas
8
3.72%
1
16.67%
Total
215
100.00%
6
100.00%



static int pwm_setup_backlight(struct intel_connector *connector,
			       enum pipe pipe)
{
	struct drm_device *dev = connector->base.dev;
	struct intel_panel *panel = &connector->panel;
	int retval;

	/* Get the PWM chip for backlight control */
	panel->backlight.pwm = pwm_get(dev->dev, "pwm_backlight");
	if (IS_ERR(panel->backlight.pwm)) {
		DRM_ERROR("Failed to own the pwm chip\n");
		panel->backlight.pwm = NULL;
		return -ENODEV;
	}

	/*
         * FIXME: pwm_apply_args() should be removed when switching to
         * the atomic PWM API.
         */
	pwm_apply_args(panel->backlight.pwm);

	retval = pwm_config(panel->backlight.pwm, CRC_PMIC_PWM_PERIOD_NS,
			    CRC_PMIC_PWM_PERIOD_NS);
	if (retval < 0) {
		DRM_ERROR("Failed to configure the pwm chip\n");
		pwm_put(panel->backlight.pwm);
		panel->backlight.pwm = NULL;
		return retval;
	}

	panel->backlight.min = 0; /* 0% */
	panel->backlight.max = 100; /* 100% */
	panel->backlight.level = DIV_ROUND_UP(
				 pwm_get_duty_cycle(panel->backlight.pwm) * 100,
				 CRC_PMIC_PWM_PERIOD_NS);
	panel->backlight.enabled = panel->backlight.level != 0;

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Shobhit Kumar
190
95.00%
1
50.00%
Boris Brezillon
10
5.00%
1
50.00%
Total
200
100.00%
2
100.00%



int intel_panel_setup_backlight(struct drm_connector *connector, enum pipe pipe)
{
	struct drm_i915_private *dev_priv = to_i915(connector->dev);
	struct intel_connector *intel_connector = to_intel_connector(connector);
	struct intel_panel *panel = &intel_connector->panel;
	int ret;

	if (!dev_priv->vbt.backlight.present) {
		if (dev_priv->quirks & QUIRK_BACKLIGHT_PRESENT) {
			DRM_DEBUG_KMS("no backlight present per VBT, but present per quirk\n");
		} else {
			DRM_DEBUG_KMS("no backlight present per VBT\n");
			return 0;
		}
	}

	/* ensure intel_panel has been initialized first */
	if (WARN_ON(!panel->backlight.setup))
		return -ENODEV;

	/* set level and max in panel struct */
	mutex_lock(&dev_priv->backlight_lock);
	ret = panel->backlight.setup(intel_connector, pipe);
	mutex_unlock(&dev_priv->backlight_lock);

	if (ret) {
		DRM_DEBUG_KMS("failed to setup backlight for connector %s\n",
			      connector->name);
		return ret;
	}

	panel->backlight.present = true;

	DRM_DEBUG_KMS("Connector %s backlight initialized, %s, brightness %u/%u\n",
		      connector->name,
		      enableddisabled(panel->backlight.enabled),
		      panel->backlight.level, panel->backlight.max);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
147
75.77%
10
62.50%
Scot Doyle
19
9.79%
1
6.25%
Matthew Garrett
12
6.19%
1
6.25%
Ville Syrjälä
11
5.67%
2
12.50%
Tvrtko A. Ursulin
3
1.55%
1
6.25%
Daniel Vetter
2
1.03%
1
6.25%
Total
194
100.00%
16
100.00%



void intel_panel_destroy_backlight(struct drm_connector *connector)
{
	struct intel_connector *intel_connector = to_intel_connector(connector);
	struct intel_panel *panel = &intel_connector->panel;

	/* dispose of the pwm */
	if (panel->backlight.pwm)
		pwm_put(panel->backlight.pwm);

	panel->backlight.present = false;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
30
53.57%
2
50.00%
Shobhit Kumar
18
32.14%
1
25.00%
Matthew Garrett
8
14.29%
1
25.00%
Total
56
100.00%
4
100.00%

/* Set up chip specific backlight functions */

static void

intel_panel_init_backlight_funcs(struct intel_panel *panel)
{
	struct intel_connector *connector =
		container_of(panel, struct intel_connector, panel);
	struct drm_i915_private *dev_priv = to_i915(connector->base.dev);

	if (connector->base.connector_type == DRM_MODE_CONNECTOR_eDP &&
	    intel_dp_aux_init_backlight_funcs(connector) == 0)
		return;

	if (connector->base.connector_type == DRM_MODE_CONNECTOR_DSI &&
	    intel_dsi_dcs_init_backlight_funcs(connector) == 0)
		return;

	if (IS_GEN9_LP(dev_priv)) {
		panel->backlight.setup = bxt_setup_backlight;
		panel->backlight.enable = bxt_enable_backlight;
		panel->backlight.disable = bxt_disable_backlight;
		panel->backlight.set = bxt_set_backlight;
		panel->backlight.get = bxt_get_backlight;
		panel->backlight.hz_to_pwm = bxt_hz_to_pwm;
	} else if (HAS_PCH_LPT(dev_priv) || HAS_PCH_SPT(dev_priv) ||
		   HAS_PCH_KBP(dev_priv)) {
		panel->backlight.setup = lpt_setup_backlight;
		panel->backlight.enable = lpt_enable_backlight;
		panel->backlight.disable = lpt_disable_backlight;
		panel->backlight.set = lpt_set_backlight;
		panel->backlight.get = lpt_get_backlight;
		if (HAS_PCH_LPT(dev_priv))
			panel->backlight.hz_to_pwm = lpt_hz_to_pwm;
		else
			panel->backlight.hz_to_pwm = spt_hz_to_pwm;
	} else if (HAS_PCH_SPLIT(dev_priv)) {
		panel->backlight.setup = pch_setup_backlight;
		panel->backlight.enable = pch_enable_backlight;
		panel->backlight.disable = pch_disable_backlight;
		panel->backlight.set = pch_set_backlight;
		panel->backlight.get = pch_get_backlight;
		panel->backlight.hz_to_pwm = pch_hz_to_pwm;
	} else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) {
		if (connector->base.connector_type == DRM_MODE_CONNECTOR_DSI) {
			panel->backlight.setup = pwm_setup_backlight;
			panel->backlight.enable = pwm_enable_backlight;
			panel->backlight.disable = pwm_disable_backlight;
			panel->backlight.set = pwm_set_backlight;
			panel->backlight.get = pwm_get_backlight;
		} else {
			panel->backlight.setup = vlv_setup_backlight;
			panel->backlight.enable = vlv_enable_backlight;
			panel->backlight.disable = vlv_disable_backlight;
			panel->backlight.set = vlv_set_backlight;
			panel->backlight.get = vlv_get_backlight;
			panel->backlight.hz_to_pwm = vlv_hz_to_pwm;
		}
	} else if (IS_GEN4(dev_priv)) {
		panel->backlight.setup = i965_setup_backlight;
		panel->backlight.enable = i965_enable_backlight;
		panel->backlight.disable = i965_disable_backlight;
		panel->backlight.set = i9xx_set_backlight;
		panel->backlight.get = i9xx_get_backlight;
		panel->backlight.hz_to_pwm = i965_hz_to_pwm;
	} else {
		panel->backlight.setup = i9xx_setup_backlight;
		panel->backlight.enable = i9xx_enable_backlight;
		panel->backlight.disable = i9xx_disable_backlight;
		panel->backlight.set = i9xx_set_backlight;
		panel->backlight.get = i9xx_get_backlight;
		panel->backlight.hz_to_pwm = i9xx_hz_to_pwm;
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
377
75.10%
10
52.63%
Shobhit Kumar
35
6.97%
1
5.26%
Vandana Kannan
33
6.57%
1
5.26%
Daniel Vetter
23
4.58%
1
5.26%
Yetunde Adebisi
18
3.59%
1
5.26%
Rodrigo Vivi
5
1.00%
1
5.26%
Wayne Boyer
4
0.80%
1
5.26%
Satheeshakrishna M
3
0.60%
1
5.26%
Matthew Garrett
3
0.60%
1
5.26%
Ander Conselvan de Oliveira
1
0.20%
1
5.26%
Total
502
100.00%
19
100.00%



int intel_panel_init(struct intel_panel *panel,
		     struct drm_display_mode *fixed_mode,
		     struct drm_display_mode *downclock_mode)
{
	intel_panel_init_backlight_funcs(panel);

	panel->fixed_mode = fixed_mode;
	panel->downclock_mode = downclock_mode;

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
29
72.50%
3
75.00%
Vandana Kannan
11
27.50%
1
25.00%
Total
40
100.00%
4
100.00%



void intel_panel_fini(struct intel_panel *panel)
{
	struct intel_connector *intel_connector =
		container_of(panel, struct intel_connector, panel);

	if (panel->fixed_mode)
		drm_mode_destroy(intel_connector->base.dev, panel->fixed_mode);

	if (panel->downclock_mode)
		drm_mode_destroy(intel_connector->base.dev,
				panel->downclock_mode);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
44
69.84%
2
66.67%
Vandana Kannan
19
30.16%
1
33.33%
Total
63
100.00%
3
100.00%

Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
4837
55.62%
45
34.62%
Jesse Barnes
765
8.80%
6
4.62%
Daniel Vetter
593
6.82%
8
6.15%
Chris Wilson
451
5.19%
8
6.15%
Shobhit Kumar
436
5.01%
1
0.77%
Ville Syrjälä
406
4.67%
17
13.08%
Vandana Kannan
389
4.47%
3
2.31%
A.Sunil Kamath
281
3.23%
1
0.77%
Matthew Garrett
96
1.10%
1
0.77%
Shawn C Lee
78
0.90%
1
0.77%
Takashi Iwai
74
0.85%
2
1.54%
Paulo Zanoni
48
0.55%
2
1.54%
Carsten Emde
47
0.54%
2
1.54%
Scot Doyle
23
0.26%
2
1.54%
Adam Jackson
18
0.21%
1
0.77%
Yetunde Adebisi
18
0.21%
1
0.77%
Tvrtko A. Ursulin
16
0.18%
2
1.54%
Ander Conselvan de Oliveira
13
0.15%
3
2.31%
Ben Widawsky
13
0.15%
2
1.54%
Mika Kahola
13
0.15%
3
2.31%
Boris Brezillon
10
0.11%
1
0.77%
Vidya Srinivas
9
0.10%
1
0.77%
Rob Clark
8
0.09%
1
0.77%
Joe Perches
7
0.08%
1
0.77%
Imre Deak
7
0.08%
1
0.77%
Jeremiah Mahler
6
0.07%
1
0.77%
Keith Packard
5
0.06%
1
0.77%
Rodrigo Vivi
5
0.06%
1
0.77%
Wayne Boyer
4
0.05%
1
0.77%
Corentin Chary
3
0.03%
1
0.77%
Satheeshakrishna M
3
0.03%
1
0.77%
Javi Merino
3
0.03%
1
0.77%
Aaron Lu
3
0.03%
1
0.77%
Joonas Lahtinen
2
0.02%
1
0.77%
U. Artie Eoff
2
0.02%
1
0.77%
Damien Lespiau
2
0.02%
1
0.77%
Stéphane Marchesin
1
0.01%
1
0.77%
Dan J Williams
1
0.01%
1
0.77%
Lukas Wunner
1
0.01%
1
0.77%
Total
8697
100.00%
130
100.00%
Directory: drivers/gpu/drm/i915

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.