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

/*
 * Copyright © 2006-2007 Intel Corporation
 *
 * 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>
 */

#include <linux/dmi.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include <drm/drmP.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_edid.h>
#include "intel_drv.h"
#include <drm/i915_drm.h>
#include "i915_drv.h"

/* Here's the desired hotplug mode */

#define ADPA_HOTPLUG_BITS (ADPA_CRT_HOTPLUG_PERIOD_128 |          \
                           ADPA_CRT_HOTPLUG_WARMUP_10MS |               \
                           ADPA_CRT_HOTPLUG_SAMPLE_4S |                 \
                           ADPA_CRT_HOTPLUG_VOLTAGE_50 |                \
                           ADPA_CRT_HOTPLUG_VOLREF_325MV |              \
                           ADPA_CRT_HOTPLUG_ENABLE)


struct intel_crt {
	
struct intel_encoder base;
	/* DPMS state is stored in the connector, which we need in the
         * encoder's enable/disable callbacks */
	
struct intel_connector *connector;
	
bool force_hotplug_required;
	
i915_reg_t adpa_reg;
};



static struct intel_crt *intel_encoder_to_crt(struct intel_encoder *encoder)
{
	return container_of(encoder, struct intel_crt, base);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Chris Wilson
20
83.33%
1
50.00%
Daniel Vetter
4
16.67%
1
50.00%
Total
24
100.00%
2
100.00%



static struct intel_crt *intel_attached_crt(struct drm_connector *connector)
{
	return intel_encoder_to_crt(intel_attached_encoder(connector));
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Daniel Vetter
22
100.00%
2
100.00%
Total
22
100.00%
2
100.00%



static bool intel_crt_get_hw_state(struct intel_encoder *encoder,
				   enum pipe *pipe)
{
	struct drm_device *dev = encoder->base.dev;
	struct drm_i915_private *dev_priv = to_i915(dev);
	struct intel_crt *crt = intel_encoder_to_crt(encoder);
	enum intel_display_power_domain power_domain;
	u32 tmp;
	bool ret;

	power_domain = intel_display_port_power_domain(encoder);
	if (!intel_display_power_get_if_enabled(dev_priv, power_domain))
		return false;

	ret = false;

	tmp = I915_READ(crt->adpa_reg);

	if (!(tmp & ADPA_DAC_ENABLE))
		goto out;

	if (HAS_PCH_CPT(dev_priv))
		*pipe = PORT_TO_PIPE_CPT(tmp);
	else
		*pipe = PORT_TO_PIPE(tmp);

	ret = true;
out:
	intel_display_power_put(dev_priv, power_domain);

	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Daniel Vetter
66
46.48%
1
16.67%
Imre Deak
48
33.80%
2
33.33%
Jesse Barnes
24
16.90%
1
16.67%
Chris Wilson
3
2.11%
1
16.67%
Tvrtko A. Ursulin
1
0.70%
1
16.67%
Total
142
100.00%
6
100.00%



static unsigned int intel_crt_get_flags(struct intel_encoder *encoder)
{
	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
	struct intel_crt *crt = intel_encoder_to_crt(encoder);
	u32 tmp, flags = 0;

	tmp = I915_READ(crt->adpa_reg);

	if (tmp & ADPA_HSYNC_ACTIVE_HIGH)
		flags |= DRM_MODE_FLAG_PHSYNC;
	else
		flags |= DRM_MODE_FLAG_NHSYNC;

	if (tmp & ADPA_VSYNC_ACTIVE_HIGH)
		flags |= DRM_MODE_FLAG_PVSYNC;
	else
		flags |= DRM_MODE_FLAG_NVSYNC;

	return flags;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jesse Barnes
75
88.24%
1
33.33%
Ville Syrjälä
7
8.24%
1
33.33%
Chris Wilson
3
3.53%
1
33.33%
Total
85
100.00%
3
100.00%



static void intel_crt_get_config(struct intel_encoder *encoder,
				 struct intel_crtc_state *pipe_config)
{
	pipe_config->base.adjusted_mode.flags |= intel_crt_get_flags(encoder);

	pipe_config->base.adjusted_mode.crtc_clock = pipe_config->port_clock;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ville Syrjälä
27
65.85%
3
42.86%
Jesse Barnes
8
19.51%
1
14.29%
Ander Conselvan de Oliveira
5
12.20%
2
28.57%
Damien Lespiau
1
2.44%
1
14.29%
Total
41
100.00%
7
100.00%



static void hsw_crt_get_config(struct intel_encoder *encoder,
			       struct intel_crtc_state *pipe_config)
{
	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);

	intel_ddi_get_config(encoder, pipe_config);

	pipe_config->base.adjusted_mode.flags &= ~(DRM_MODE_FLAG_PHSYNC |
					      DRM_MODE_FLAG_NHSYNC |
					      DRM_MODE_FLAG_PVSYNC |
					      DRM_MODE_FLAG_NVSYNC);
	pipe_config->base.adjusted_mode.flags |= intel_crt_get_flags(encoder);

	pipe_config->base.adjusted_mode.crtc_clock = lpt_get_iclkip(dev_priv);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ville Syrjälä
77
93.90%
2
50.00%
Ander Conselvan de Oliveira
5
6.10%
2
50.00%
Total
82
100.00%
4
100.00%

/* Note: The caller is required to filter out dpms modes not supported by the
 * platform. */


static void intel_crt_set_dpms(struct intel_encoder *encoder,
			       struct intel_crtc_state *crtc_state,
			       int mode)
{
	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
	struct intel_crt *crt = intel_encoder_to_crt(encoder);
	struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
	const struct drm_display_mode *adjusted_mode = &crtc_state->base.adjusted_mode;
	u32 adpa;

	if (INTEL_GEN(dev_priv) >= 5)
		adpa = ADPA_HOTPLUG_BITS;
	else
		adpa = 0;

	if (adjusted_mode->flags & DRM_MODE_FLAG_PHSYNC)
		adpa |= ADPA_HSYNC_ACTIVE_HIGH;
	if (adjusted_mode->flags & DRM_MODE_FLAG_PVSYNC)
		adpa |= ADPA_VSYNC_ACTIVE_HIGH;

	/* For CPT allow 3 pipe config, for others just use A or B */
	if (HAS_PCH_LPT(dev_priv))
		; /* Those bits don't exist here */
	else if (HAS_PCH_CPT(dev_priv))
		adpa |= PORT_TRANS_SEL_CPT(crtc->pipe);
	else if (crtc->pipe == 0)
		adpa |= ADPA_PIPE_A_SELECT;
	else
		adpa |= ADPA_PIPE_B_SELECT;

	if (!HAS_PCH_SPLIT(dev_priv))
		I915_WRITE(BCLRPAT(crtc->pipe), 0);

	switch (mode) {
	case DRM_MODE_DPMS_ON:
		adpa |= ADPA_DAC_ENABLE;
		break;
	case DRM_MODE_DPMS_STANDBY:
		adpa |= ADPA_DAC_ENABLE | ADPA_HSYNC_CNTL_DISABLE;
		break;
	case DRM_MODE_DPMS_SUSPEND:
		adpa |= ADPA_DAC_ENABLE | ADPA_VSYNC_CNTL_DISABLE;
		break;
	case DRM_MODE_DPMS_OFF:
		adpa |= ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE;
		break;
	}

	I915_WRITE(crt->adpa_reg, adpa);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Daniel Vetter
138
59.23%
2
16.67%
Jesse Barnes
67
28.76%
2
16.67%
Tvrtko A. Ursulin
9
3.86%
2
16.67%
Maarten Lankhorst
7
3.00%
1
8.33%
Zhenyu Wang
5
2.15%
1
8.33%
Chris Wilson
3
1.29%
1
8.33%
Ander Conselvan de Oliveira
3
1.29%
2
16.67%
Ville Syrjälä
1
0.43%
1
8.33%
Total
233
100.00%
12
100.00%



static void intel_disable_crt(struct intel_encoder *encoder,
			      struct intel_crtc_state *old_crtc_state,
			      struct drm_connector_state *old_conn_state)
{
	intel_crt_set_dpms(encoder, old_crtc_state, DRM_MODE_DPMS_OFF);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Adam Jackson
18
60.00%
1
33.33%
Maarten Lankhorst
12
40.00%
2
66.67%
Total
30
100.00%
3
100.00%



static void pch_disable_crt(struct intel_encoder *encoder,
			    struct intel_crtc_state *old_crtc_state,
			    struct drm_connector_state *old_conn_state)
{
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Maarten Lankhorst
10
50.00%
1
50.00%
Ville Syrjälä
10
50.00%
1
50.00%
Total
20
100.00%
2
100.00%



static void pch_post_disable_crt(struct intel_encoder *encoder,
				 struct intel_crtc_state *old_crtc_state,
				 struct drm_connector_state *old_conn_state)
{
	intel_disable_crt(encoder, old_crtc_state, old_conn_state);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ville Syrjälä
16
53.33%
1
50.00%
Maarten Lankhorst
14
46.67%
1
50.00%
Total
30
100.00%
2
100.00%



static void hsw_post_disable_crt(struct intel_encoder *encoder,
				 struct intel_crtc_state *old_crtc_state,
				 struct drm_connector_state *old_conn_state)
{
	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);

	pch_post_disable_crt(encoder, old_crtc_state, old_conn_state);

	lpt_disable_pch_transcoder(dev_priv);
	lpt_disable_iclkip(dev_priv);

	intel_ddi_fdi_post_disable(encoder, old_crtc_state, old_conn_state);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Maarten Lankhorst
63
100.00%
1
100.00%
Total
63
100.00%
1
100.00%



static void intel_enable_crt(struct intel_encoder *encoder,
			     struct intel_crtc_state *pipe_config,
			     struct drm_connector_state *conn_state)
{
	intel_crt_set_dpms(encoder, pipe_config, DRM_MODE_DPMS_ON);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Adam Jackson
17
56.67%
1
25.00%
Maarten Lankhorst
13
43.33%
3
75.00%
Total
30
100.00%
4
100.00%


static enum drm_mode_status

intel_crt_mode_valid(struct drm_connector *connector,
		     struct drm_display_mode *mode)
{
	struct drm_device *dev = connector->dev;
	struct drm_i915_private *dev_priv = to_i915(dev);
	int max_dotclk = dev_priv->max_dotclk_freq;
	int max_clock;

	if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
		return MODE_NO_DBLESCAN;

	if (mode->clock < 25000)
		return MODE_CLOCK_LOW;

	if (HAS_PCH_LPT(dev_priv))
		max_clock = 180000;
	else if (IS_VALLEYVIEW(dev_priv))
		/*
                 * 270 MHz due to current DPLL limits,
                 * DAC limit supposedly 355 MHz.
                 */
		max_clock = 270000;
	else if (IS_GEN3(dev_priv) || IS_GEN4(dev_priv))
		max_clock = 400000;
	else
		max_clock = 350000;
	if (mode->clock > max_clock)
		return MODE_CLOCK_HIGH;

	if (mode->clock > max_dotclk)
		return MODE_CLOCK_HIGH;

	/* The FDI receiver on LPT only supports 8bpc and only has 2 lanes. */
	if (HAS_PCH_LPT(dev_priv) &&
	    (ironlake_get_lanes_required(mode->clock, 270000, 24) > 2))
		return MODE_CLOCK_HIGH;

	return MODE_OK;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jesse Barnes
41
24.85%
1
11.11%
Yakui Zhao
33
20.00%
1
11.11%
Ville Syrjälä
30
18.18%
1
11.11%
Paulo Zanoni
25
15.15%
1
11.11%
Mika Kahola
20
12.12%
1
11.11%
Tvrtko A. Ursulin
14
8.48%
3
33.33%
Damien Lespiau
2
1.21%
1
11.11%
Total
165
100.00%
9
100.00%



static bool intel_crt_compute_config(struct intel_encoder *encoder,
				     struct intel_crtc_state *pipe_config,
				     struct drm_connector_state *conn_state)
{
	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);

	if (HAS_PCH_SPLIT(dev_priv))
		pipe_config->has_pch_encoder = true;

	/* LPT FDI RX only supports 8bpc. */
	if (HAS_PCH_LPT(dev_priv)) {
		if (pipe_config->bw_constrained && pipe_config->pipe_bpp < 24) {
			DRM_DEBUG_KMS("LPT only supports 24bpp\n");
			return false;
		}

		pipe_config->pipe_bpp = 24;
	}

	/* FDI must always be 2.7 GHz */
	if (HAS_DDI(dev_priv))
		pipe_config->port_clock = 135000 * 2;

	return true;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Daniel Vetter
61
58.10%
3
37.50%
Jesse Barnes
15
14.29%
1
12.50%
Ville Syrjälä
15
14.29%
1
12.50%
Tvrtko A. Ursulin
8
7.62%
1
12.50%
Maarten Lankhorst
5
4.76%
1
12.50%
Ander Conselvan de Oliveira
1
0.95%
1
12.50%
Total
105
100.00%
8
100.00%



static bool intel_ironlake_crt_detect_hotplug(struct drm_connector *connector)
{
	struct drm_device *dev = connector->dev;
	struct intel_crt *crt = intel_attached_crt(connector);
	struct drm_i915_private *dev_priv = to_i915(dev);
	u32 adpa;
	bool ret;

	/* The first time through, trigger an explicit detection cycle */
	if (crt->force_hotplug_required) {
		bool turn_off_dac = HAS_PCH_SPLIT(dev_priv);
		u32 save_adpa;

		crt->force_hotplug_required = 0;

		save_adpa = adpa = I915_READ(crt->adpa_reg);
		DRM_DEBUG_KMS("trigger hotplug detect cycle: adpa=0x%x\n", adpa);

		adpa |= ADPA_CRT_HOTPLUG_FORCE_TRIGGER;
		if (turn_off_dac)
			adpa &= ~ADPA_DAC_ENABLE;

		I915_WRITE(crt->adpa_reg, adpa);

		if (intel_wait_for_register(dev_priv,
					    crt->adpa_reg,
					    ADPA_CRT_HOTPLUG_FORCE_TRIGGER, 0,
					    1000))
			DRM_DEBUG_KMS("timed out waiting for FORCE_TRIGGER");

		if (turn_off_dac) {
			I915_WRITE(crt->adpa_reg, save_adpa);
			POSTING_READ(crt->adpa_reg);
		}
	}

	/* Check the status to see if both blue and green are on now */
	adpa = I915_READ(crt->adpa_reg);
	if ((adpa & ADPA_CRT_HOTPLUG_MONITOR_MASK) != 0)
		ret = true;
	else
		ret = false;
	DRM_DEBUG_KMS("ironlake hotplug adpa=0x%x, result %d\n", adpa, ret);

	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Zhenyu Wang
96
48.73%
3
25.00%
Keith Packard
53
26.90%
1
8.33%
Ville Syrjälä
18
9.14%
1
8.33%
Chris Wilson
17
8.63%
4
33.33%
Dave Airlie
11
5.58%
1
8.33%
Adam Jackson
1
0.51%
1
8.33%
Tvrtko A. Ursulin
1
0.51%
1
8.33%
Total
197
100.00%
12
100.00%



static bool valleyview_crt_detect_hotplug(struct drm_connector *connector)
{
	struct drm_device *dev = connector->dev;
	struct intel_crt *crt = intel_attached_crt(connector);
	struct drm_i915_private *dev_priv = to_i915(dev);
	bool reenable_hpd;
	u32 adpa;
	bool ret;
	u32 save_adpa;

	/*
         * Doing a force trigger causes a hpd interrupt to get sent, which can
         * get us stuck in a loop if we're polling:
         *  - We enable power wells and reset the ADPA
         *  - output_poll_exec does force probe on VGA, triggering a hpd
         *  - HPD handler waits for poll to unlock dev->mode_config.mutex
         *  - output_poll_exec shuts off the ADPA, unlocks
         *    dev->mode_config.mutex
         *  - HPD handler runs, resets ADPA and brings us back to the start
         *
         * Just disable HPD interrupts here to prevent this
         */
	reenable_hpd = intel_hpd_disable(dev_priv, crt->base.hpd_pin);

	save_adpa = adpa = I915_READ(crt->adpa_reg);
	DRM_DEBUG_KMS("trigger hotplug detect cycle: adpa=0x%x\n", adpa);

	adpa |= ADPA_CRT_HOTPLUG_FORCE_TRIGGER;

	I915_WRITE(crt->adpa_reg, adpa);

	if (intel_wait_for_register(dev_priv,
				    crt->adpa_reg,
				    ADPA_CRT_HOTPLUG_FORCE_TRIGGER, 0,
				    1000)) {
		DRM_DEBUG_KMS("timed out waiting for FORCE_TRIGGER");
		I915_WRITE(crt->adpa_reg, save_adpa);
	}

	/* Check the status to see if both blue and green are on now */
	adpa = I915_READ(crt->adpa_reg);
	if ((adpa & ADPA_CRT_HOTPLUG_MONITOR_MASK) != 0)
		ret = true;
	else
		ret = false;

	DRM_DEBUG_KMS("valleyview hotplug adpa=0x%x, result %d\n", adpa, ret);

	if (reenable_hpd)
		intel_hpd_enable(dev_priv, crt->base.hpd_pin);

	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jesse Barnes
121
65.05%
1
20.00%
Stephen Chandler Paul
32
17.20%
1
20.00%
Ville Syrjälä
25
13.44%
1
20.00%
Chris Wilson
8
4.30%
2
40.00%
Total
186
100.00%
5
100.00%

/**
 * Uses CRT_HOTPLUG_EN and CRT_HOTPLUG_STAT to detect CRT presence.
 *
 * Not for i915G/i915GM
 *
 * \return true if CRT is connected.
 * \return false if CRT is disconnected.
 */


static bool intel_crt_detect_hotplug(struct drm_connector *connector)
{
	struct drm_device *dev = connector->dev;
	struct drm_i915_private *dev_priv = to_i915(dev);
	u32 stat;
	bool ret = false;
	int i, tries = 0;

	if (HAS_PCH_SPLIT(dev_priv))
		return intel_ironlake_crt_detect_hotplug(connector);

	if (IS_VALLEYVIEW(dev_priv))
		return valleyview_crt_detect_hotplug(connector);

	/*
         * On 4 series desktop, CRT detect sequence need to be done twice
         * to get a reliable result.
         */

	if (IS_G4X(dev_priv) && !IS_GM45(dev_priv))
		tries = 2;
	else
		tries = 1;

	for (i = 0; i < tries ; i++) {
		/* turn on the FORCE_DETECT */
		i915_hotplug_interrupt_update(dev_priv,
					      CRT_HOTPLUG_FORCE_DETECT,
					      CRT_HOTPLUG_FORCE_DETECT);
		/* wait for FORCE_DETECT to go off */
		if (intel_wait_for_register(dev_priv, PORT_HOTPLUG_EN,
					    CRT_HOTPLUG_FORCE_DETECT, 0,
					    1000))
			DRM_DEBUG_KMS("timed out waiting for FORCE_DETECT to go off");
	}

	stat = I915_READ(PORT_HOTPLUG_STAT);
	if ((stat & CRT_HOTPLUG_MONITOR_MASK) != CRT_HOTPLUG_MONITOR_NONE)
		ret = true;

	/* clear the interrupt we just generated, if any */
	I915_WRITE(PORT_HOTPLUG_STAT, CRT_HOTPLUG_INT_STATUS);

	i915_hotplug_interrupt_update(dev_priv, CRT_HOTPLUG_FORCE_DETECT, 0);

	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jesse Barnes
67
37.02%
2
12.50%
Yakui Zhao
42
23.20%
1
6.25%
Adam Jackson
30
16.57%
2
12.50%
Chris Wilson
15
8.29%
4
25.00%
Zhenyu Wang
12
6.63%
2
12.50%
Egbert Eich
10
5.52%
1
6.25%
Tvrtko A. Ursulin
4
2.21%
3
18.75%
Eric Anholt
1
0.55%
1
6.25%
Total
181
100.00%
16
100.00%



static struct edid *intel_crt_get_edid(struct drm_connector *connector,
				struct i2c_adapter *i2c)
{
	struct edid *edid;

	edid = drm_get_edid(connector, i2c);

	if (!edid && !intel_gmbus_is_forced_bit(i2c)) {
		DRM_DEBUG_KMS("CRT GMBUS EDID read failed, retry using GPIO bit-banging\n");
		intel_gmbus_force_bit(i2c, true);
		edid = drm_get_edid(connector, i2c);
		intel_gmbus_force_bit(i2c, false);
	}

	return edid;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
76
100.00%
1
100.00%
Total
76
100.00%
1
100.00%

/* local version of intel_ddc_get_modes() to use intel_crt_get_edid() */


static int intel_crt_ddc_get_modes(struct drm_connector *connector,
				struct i2c_adapter *adapter)
{
	struct edid *edid;
	int ret;

	edid = intel_crt_get_edid(connector, adapter);
	if (!edid)
		return 0;

	ret = intel_connector_update_modes(connector, edid);
	kfree(edid);

	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
58
100.00%
2
100.00%
Total
58
100.00%
2
100.00%



static bool intel_crt_detect_ddc(struct drm_connector *connector)
{
	struct intel_crt *crt = intel_attached_crt(connector);
	struct drm_i915_private *dev_priv = to_i915(crt->base.base.dev);
	struct edid *edid;
	struct i2c_adapter *i2c;
	bool ret = false;

	BUG_ON(crt->base.type != INTEL_OUTPUT_ANALOG);

	i2c = intel_gmbus_get_adapter(dev_priv, dev_priv->vbt.crt_ddc_pin);
	edid = intel_crt_get_edid(connector, i2c);

	if (edid) {
		bool is_digital = edid->input & DRM_EDID_INPUT_DIGITAL;

		/*
                 * This may be a DVI-I connector with a shared DDC
                 * link between analog and digital outputs, so we
                 * have to check the EDID input spec of the attached device.
                 */
		if (!is_digital) {
			DRM_DEBUG_KMS("CRT detected via DDC:0x50 [EDID]\n");
			ret = true;
		} else {
			DRM_DEBUG_KMS("CRT not detected via DDC:0x50 [EDID reports a digital panel]\n");
		}
	} else {
		DRM_DEBUG_KMS("CRT not detected via DDC:0x50 [no valid EDID found]\n");
	}

	kfree(edid);

	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Dave Müller
43
30.50%
1
8.33%
Chris Wilson
29
20.57%
5
41.67%
Daniel Vetter
27
19.15%
1
8.33%
Daniel Kurtz
16
11.35%
1
8.33%
Ander Conselvan de Oliveira
12
8.51%
1
8.33%
Jesse Barnes
11
7.80%
1
8.33%
Rodrigo Vivi
2
1.42%
1
8.33%
Jani Nikula
1
0.71%
1
8.33%
Total
141
100.00%
12
100.00%


static enum drm_connector_status

intel_crt_load_detect(struct intel_crt *crt, uint32_t pipe)
{
	struct drm_device *dev = crt->base.base.dev;
	struct drm_i915_private *dev_priv = to_i915(dev);
	uint32_t save_bclrpat;
	uint32_t save_vtotal;
	uint32_t vtotal, vactive;
	uint32_t vsample;
	uint32_t vblank, vblank_start, vblank_end;
	uint32_t dsl;
	i915_reg_t bclrpat_reg, vtotal_reg,
		vblank_reg, vsync_reg, pipeconf_reg, pipe_dsl_reg;
	uint8_t	st00;
	enum drm_connector_status status;

	DRM_DEBUG_KMS("starting load-detect on CRT\n");

	bclrpat_reg = BCLRPAT(pipe);
	vtotal_reg = VTOTAL(pipe);
	vblank_reg = VBLANK(pipe);
	vsync_reg = VSYNC(pipe);
	pipeconf_reg = PIPECONF(pipe);
	pipe_dsl_reg = PIPEDSL(pipe);

	save_bclrpat = I915_READ(bclrpat_reg);
	save_vtotal = I915_READ(vtotal_reg);
	vblank = I915_READ(vblank_reg);

	vtotal = ((save_vtotal >> 16) & 0xfff) + 1;
	vactive = (save_vtotal & 0x7ff) + 1;

	vblank_start = (vblank & 0xfff) + 1;
	vblank_end = ((vblank >> 16) & 0xfff) + 1;

	/* Set the border color to purple. */
	I915_WRITE(bclrpat_reg, 0x500050);

	if (!IS_GEN2(dev_priv)) {
		uint32_t pipeconf = I915_READ(pipeconf_reg);
		I915_WRITE(pipeconf_reg, pipeconf | PIPECONF_FORCE_BORDER);
		POSTING_READ(pipeconf_reg);
		/* Wait for next Vblank to substitue
                 * border color for Color info */
		intel_wait_for_vblank(dev_priv, pipe);
		st00 = I915_READ8(_VGA_MSR_WRITE);
		status = ((st00 & (1 << 4)) != 0) ?
			connector_status_connected :
			connector_status_disconnected;

		I915_WRITE(pipeconf_reg, pipeconf);
	} else {
		bool restore_vblank = false;
		int count, detect;

		/*
                * If there isn't any border, add some.
                * Yes, this will flicker
                */
		if (vblank_start <= vactive && vblank_end >= vtotal) {
			uint32_t vsync = I915_READ(vsync_reg);
			uint32_t vsync_start = (vsync & 0xffff) + 1;

			vblank_start = vsync_start;
			I915_WRITE(vblank_reg,
				   (vblank_start - 1) |
				   ((vblank_end - 1) << 16));
			restore_vblank = true;
		}
		/* sample in the vertical border, selecting the larger one */
		if (vblank_start - vactive >= vtotal - vblank_end)
			vsample = (vblank_start + vactive) >> 1;
		else
			vsample = (vtotal + vblank_end) >> 1;

		/*
                 * Wait for the border to be displayed
                 */
		while (I915_READ(pipe_dsl_reg) >= vactive)
			;
		while ((dsl = I915_READ(pipe_dsl_reg)) <= vsample)
			;
		/*
                 * Watch ST00 for an entire scanline
                 */
		detect = 0;
		count = 0;
		do {
			count++;
			/* Read the ST00 VGA status register */
			st00 = I915_READ8(_VGA_MSR_WRITE);
			if (st00 & (1 << 4))
				detect++;
		} while ((I915_READ(pipe_dsl_reg) == dsl));

		/* restore vblank if necessary */
		if (restore_vblank)
			I915_WRITE(vblank_reg, vblank);
		/*
                 * If more than 3/4 of the scanline detected a monitor,
                 * then it is assumed to be present. This works even on i830,
                 * where there isn't any way to force the border color across
                 * the screen
                 */
		status = detect * 4 > count * 3 ?
			 connector_status_connected :
			 connector_status_disconnected;
	}

	/* Restore previous settings */
	I915_WRITE(bclrpat_reg, save_bclrpat);

	return status;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ma Ling
433
87.12%
1
7.14%
Jesse Barnes
26
5.23%
2
14.29%
Chris Wilson
25
5.03%
7
50.00%
Ville Syrjälä
9
1.81%
2
14.29%
Maarten Lankhorst
3
0.60%
1
7.14%
Tvrtko A. Ursulin
1
0.20%
1
7.14%
Total
497
100.00%
14
100.00%



static int intel_spurious_crt_detect_dmi_callback(const struct dmi_system_id *id)
{
	DRM_DEBUG_DRIVER("Skipping CRT detection for %s\n", id->ident);
	return 1;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Ville Syrjälä
24
100.00%
1
100.00%
Total
24
100.00%
1
100.00%


static const struct dmi_system_id intel_spurious_crt_detect[] = {
	{
		.callback = intel_spurious_crt_detect_dmi_callback,
		.ident = "ACER ZGB",
		.matches = {
			DMI_MATCH(DMI_SYS_VENDOR, "ACER"),
			DMI_MATCH(DMI_PRODUCT_NAME, "ZGB"),
                },
        },
	{
		.callback = intel_spurious_crt_detect_dmi_callback,
		.ident = "Intel DZ77BH-55K",
		.matches = {
			DMI_MATCH(DMI_BOARD_VENDOR, "Intel Corporation"),
			DMI_MATCH(DMI_BOARD_NAME, "DZ77BH-55K"),
                },
        },
	{ }
};


static enum drm_connector_status

intel_crt_detect(struct drm_connector *connector, bool force)
{
	struct drm_i915_private *dev_priv = to_i915(connector->dev);
	struct intel_crt *crt = intel_attached_crt(connector);
	struct intel_encoder *intel_encoder = &crt->base;
	enum intel_display_power_domain power_domain;
	enum drm_connector_status status;
	struct intel_load_detect_pipe tmp;
	struct drm_modeset_acquire_ctx ctx;

	DRM_DEBUG_KMS("[CONNECTOR:%d:%s] force=%d\n",
		      connector->base.id, connector->name,
		      force);

	/* Skip machines without VGA that falsely report hotplug events */
	if (dmi_check_system(intel_spurious_crt_detect))
		return connector_status_disconnected;

	power_domain = intel_display_port_power_domain(intel_encoder);
	intel_display_power_get(dev_priv, power_domain);

	if (I915_HAS_HOTPLUG(dev_priv)) {
		/* We can not rely on the HPD pin always being correctly wired
                 * up, for example many KVM do not pass it through, and so
                 * only trust an assertion that the monitor is connected.
                 */
		if (intel_crt_detect_hotplug(connector)) {
			DRM_DEBUG_KMS("CRT detected via hotplug\n");
			status = connector_status_connected;
			goto out;
		} else
			DRM_DEBUG_KMS("CRT not detected via hotplug\n");
	}

	if (intel_crt_detect_ddc(connector)) {
		status = connector_status_connected;
		goto out;
	}

	/* Load detection is broken on HPD capable machines. Whoever wants a
         * broken monitor (without edid) to work behind a broken kvm (that fails
         * to have the right resistors for HP detection) needs to fix this up.
         * For now just bail out. */
	if (I915_HAS_HOTPLUG(dev_priv) && !i915.load_detect_test) {
		status = connector_status_disconnected;
		goto out;
	}

	if (!force) {
		status = connector->status;
		goto out;
	}

	drm_modeset_acquire_init(&ctx, 0);

	/* for pre-945g platforms use load detect */
	if (intel_get_load_detect_pipe(connector, NULL, &tmp, &ctx)) {
		if (intel_crt_detect_ddc(connector))
			status = connector_status_connected;
		else if (INTEL_GEN(dev_priv) < 4)
			status = intel_crt_load_detect(crt,
				to_intel_crtc(connector->state->crtc)->pipe);
		else if (i915.load_detect_test)
			status = connector_status_disconnected;
		else
			status = connector_status_unknown;
		intel_release_load_detect_pipe(connector, &tmp, &ctx);
	} else
		status = connector_status_unknown;

	drm_modeset_drop_locks(&ctx);
	drm_modeset_acquire_fini(&ctx);

out:
	intel_display_power_put(dev_priv, power_domain);
	return status;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Chris Wilson
56
17.67%
9
32.14%
Paulo Zanoni
39
12.30%
1
3.57%
Jesse Barnes
37
11.67%
1
3.57%
Ma Ling
36
11.36%
1
3.57%
Imre Deak
35
11.04%
1
3.57%
Daniel Vetter
31
9.78%
3
10.71%
Ville Syrjälä
31
9.78%
2
7.14%
Maarten Lankhorst
22
6.94%
2
7.14%
Rob Clark
7
2.21%
1
3.57%
Keith Packard
6
1.89%
1
3.57%
Tvrtko A. Ursulin
6
1.89%
2
7.14%
Zhenyu Wang
4
1.26%
1
3.57%
Ander Conselvan de Oliveira
3
0.95%
1
3.57%
Dave Müller
2
0.63%
1
3.57%
Jani Nikula
2
0.63%
1
3.57%
Total
317
100.00%
28
100.00%



static void intel_crt_destroy(struct drm_connector *connector)
{
	drm_connector_cleanup(connector);
	kfree(connector);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jesse Barnes
21
100.00%
1
100.00%
Total
21
100.00%
1
100.00%



static int intel_crt_get_modes(struct drm_connector *connector)
{
	struct drm_device *dev = connector->dev;
	struct drm_i915_private *dev_priv = to_i915(dev);
	struct intel_crt *crt = intel_attached_crt(connector);
	struct intel_encoder *intel_encoder = &crt->base;
	enum intel_display_power_domain power_domain;
	int ret;
	struct i2c_adapter *i2c;

	power_domain = intel_display_port_power_domain(intel_encoder);
	intel_display_power_get(dev_priv, power_domain);

	i2c = intel_gmbus_get_adapter(dev_priv, dev_priv->vbt.crt_ddc_pin);
	ret = intel_crt_ddc_get_modes(connector, i2c);
	if (ret || !IS_G4X(dev_priv))
		goto out;

	/* Try to probe digital port for output in DVI-I -> VGA mode. */
	i2c = intel_gmbus_get_adapter(dev_priv, GMBUS_PIN_DPB);
	ret = intel_crt_ddc_get_modes(connector, i2c);

out:
	intel_display_power_put(dev_priv, power_domain);

	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Imre Deak
55
38.73%
1
7.69%
Daniel Kurtz
25
17.61%
1
7.69%
Ma Ling
20
14.08%
1
7.69%
Chris Wilson
16
11.27%
3
23.08%
Jesse Barnes
14
9.86%
1
7.69%
Zhenyu Wang
6
4.23%
2
15.38%
Jani Nikula
3
2.11%
2
15.38%
Rodrigo Vivi
2
1.41%
1
7.69%
Tvrtko A. Ursulin
1
0.70%
1
7.69%
Total
142
100.00%
13
100.00%



static int intel_crt_set_property(struct drm_connector *connector,
				  struct drm_property *property,
				  uint64_t value)
{
	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jesse Barnes
22
100.00%
1
100.00%
Total
22
100.00%
1
100.00%



void intel_crt_reset(struct drm_encoder *encoder)
{
	struct drm_i915_private *dev_priv = to_i915(encoder->dev);
	struct intel_crt *crt = intel_encoder_to_crt(to_intel_encoder(encoder));

	if (INTEL_GEN(dev_priv) >= 5) {
		u32 adpa;

		adpa = I915_READ(crt->adpa_reg);
		adpa &= ~ADPA_CRT_HOTPLUG_MASK;
		adpa |= ADPA_HOTPLUG_BITS;
		I915_WRITE(crt->adpa_reg, adpa);
		POSTING_READ(crt->adpa_reg);

		DRM_DEBUG_KMS("crt adpa set to 0x%x\n", adpa);
		crt->force_hotplug_required = 1;
	}

}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Daniel Vetter
43
44.79%
1
12.50%
Chris Wilson
32
33.33%
3
37.50%
Ville Syrjälä
10
10.42%
2
25.00%
Stephen Chandler Paul
7
7.29%
1
12.50%
Tvrtko A. Ursulin
4
4.17%
1
12.50%
Total
96
100.00%
8
100.00%

/*
 * Routines for controlling stuff on the analog port
 */


static const struct drm_connector_funcs intel_crt_connector_funcs = {
	.dpms = drm_atomic_helper_connector_dpms,
	.detect = intel_crt_detect,
	.fill_modes = drm_helper_probe_single_connector_modes,
	.late_register = intel_connector_register,
	.early_unregister = intel_connector_unregister,
	.destroy = intel_crt_destroy,
	.set_property = intel_crt_set_property,
	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
	.atomic_get_property = intel_connector_atomic_get_property,
};


static const struct drm_connector_helper_funcs intel_crt_connector_helper_funcs = {
	.mode_valid = intel_crt_mode_valid,
	.get_modes = intel_crt_get_modes,
};


static const struct drm_encoder_funcs intel_crt_enc_funcs = {
	.reset = intel_crt_reset,
	.destroy = intel_encoder_destroy,
};



void intel_crt_init(struct drm_i915_private *dev_priv)
{
	struct drm_connector *connector;
	struct intel_crt *crt;
	struct intel_connector *intel_connector;
	i915_reg_t adpa_reg;
	u32 adpa;

	if (HAS_PCH_SPLIT(dev_priv))
		adpa_reg = PCH_ADPA;
	else if (IS_VALLEYVIEW(dev_priv))
		adpa_reg = VLV_ADPA;
	else
		adpa_reg = ADPA;

	adpa = I915_READ(adpa_reg);
	if ((adpa & ADPA_DAC_ENABLE) == 0) {
		/*
                 * On some machines (some IVB at least) CRT can be
                 * fused off, but there's no known fuse bit to
                 * indicate that. On these machine the ADPA register
                 * works normally, except the DAC enable bit won't
                 * take. So the only way to tell is attempt to enable
                 * it and see what happens.
                 */
		I915_WRITE(adpa_reg, adpa | ADPA_DAC_ENABLE |
			   ADPA_HSYNC_CNTL_DISABLE | ADPA_VSYNC_CNTL_DISABLE);
		if ((I915_READ(adpa_reg) & ADPA_DAC_ENABLE) == 0)
			return;
		I915_WRITE(adpa_reg, adpa);
	}

	crt = kzalloc(sizeof(struct intel_crt), GFP_KERNEL);
	if (!crt)
		return;

	intel_connector = intel_connector_alloc();
	if (!intel_connector) {
		kfree(crt);
		return;
	}

	connector = &intel_connector->base;
	crt->connector = intel_connector;
	drm_connector_init(&dev_priv->drm, &intel_connector->base,
			   &intel_crt_connector_funcs, DRM_MODE_CONNECTOR_VGA);

	drm_encoder_init(&dev_priv->drm, &crt->base.base, &intel_crt_enc_funcs,
			 DRM_MODE_ENCODER_DAC, "CRT");

	intel_connector_attach_encoder(intel_connector, &crt->base);

	crt->base.type = INTEL_OUTPUT_ANALOG;
	crt->base.cloneable = (1 << INTEL_OUTPUT_DVO) | (1 << INTEL_OUTPUT_HDMI);
	if (IS_I830(dev_priv))
		crt->base.crtc_mask = (1 << 0);
	else
		crt->base.crtc_mask = (1 << 0) | (1 << 1) | (1 << 2);

	if (IS_GEN2(dev_priv))
		connector->interlace_allowed = 0;
	else
		connector->interlace_allowed = 1;
	connector->doublescan_allowed = 0;

	crt->adpa_reg = adpa_reg;

	crt->base.compute_config = intel_crt_compute_config;
	if (HAS_PCH_SPLIT(dev_priv)) {
		crt->base.disable = pch_disable_crt;
		crt->base.post_disable = pch_post_disable_crt;
	} else {
		crt->base.disable = intel_disable_crt;
	}
	crt->base.enable = intel_enable_crt;
	if (I915_HAS_HOTPLUG(dev_priv) &&
	    !dmi_check_system(intel_spurious_crt_detect))
		crt->base.hpd_pin = HPD_CRT;
	if (HAS_DDI(dev_priv)) {
		crt->base.port = PORT_E;
		crt->base.get_config = hsw_crt_get_config;
		crt->base.get_hw_state = intel_ddi_get_hw_state;
		crt->base.post_disable = hsw_post_disable_crt;
	} else {
		crt->base.port = PORT_NONE;
		crt->base.get_config = intel_crt_get_config;
		crt->base.get_hw_state = intel_crt_get_hw_state;
	}
	intel_connector->get_hw_state = intel_connector_get_hw_state;

	drm_connector_helper_add(connector, &intel_crt_connector_helper_funcs);

	if (!I915_HAS_HOTPLUG(dev_priv))
		intel_connector->polled = DRM_CONNECTOR_POLL_CONNECT;

	/*
         * Configure the automatic hotplug detection stuff
         */
	crt->force_hotplug_required = 0;

	/*
         * TODO: find a proper way to discover whether we need to set the the
         * polarity and link reversal bits or not, instead of relying on the
         * BIOS.
         */
	if (HAS_PCH_LPT(dev_priv)) {
		u32 fdi_config = FDI_RX_POLARITY_REVERSED_LPT |
				 FDI_RX_LINK_REVERSAL_OVERRIDE;

		dev_priv->fdi_rx_config = I915_READ(FDI_RX_CTL(PIPE_A)) & fdi_config;
	}

	intel_crt_reset(&crt->base.base);
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Ville Syrjälä
163
30.64%
10
20.41%
Jesse Barnes
94
17.67%
3
6.12%
Daniel Vetter
64
12.03%
8
16.33%
Paulo Zanoni
25
4.70%
2
4.08%
Chris Wilson
24
4.51%
3
6.12%
Zhenyu Wang
22
4.14%
1
2.04%
Ma Ling
18
3.38%
1
2.04%
Eugeni Dodonov
16
3.01%
1
2.04%
Dhinakaran Pandiyan
16
3.01%
1
2.04%
Keith Packard
13
2.44%
2
4.08%
Damien Lespiau
12
2.26%
1
2.04%
Ander Conselvan de Oliveira
12
2.26%
2
4.08%
Dave Airlie
11
2.07%
1
2.04%
Egbert Eich
11
2.07%
2
4.08%
Tvrtko A. Ursulin
9
1.69%
6
12.24%
Maarten Lankhorst
8
1.50%
1
2.04%
Stephen Chandler Paul
6
1.13%
1
2.04%
Adam Jackson
6
1.13%
1
2.04%
Krzysztof Hałasa
1
0.19%
1
2.04%
Dave Müller
1
0.19%
1
2.04%
Total
532
100.00%
49
100.00%

Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Jesse Barnes
721
19.01%
6
4.03%
Ville Syrjälä
537
14.16%
22
14.77%
Ma Ling
507
13.37%
3
2.01%
Daniel Vetter
459
12.10%
18
12.08%
Chris Wilson
271
7.14%
25
16.78%
Maarten Lankhorst
158
4.17%
8
5.37%
Zhenyu Wang
145
3.82%
7
4.70%
Jani Nikula
141
3.72%
4
2.68%
Imre Deak
138
3.64%
3
2.01%
Paulo Zanoni
89
2.35%
4
2.68%
Keith Packard
84
2.21%
3
2.01%
Adam Jackson
78
2.06%
3
2.01%
Yakui Zhao
75
1.98%
2
1.34%
Tvrtko A. Ursulin
58
1.53%
8
5.37%
Stephen Chandler Paul
50
1.32%
2
1.34%
Dave Müller
48
1.27%
2
1.34%
Ander Conselvan de Oliveira
46
1.21%
8
5.37%
Daniel Kurtz
41
1.08%
1
0.67%
Dave Airlie
22
0.58%
2
1.34%
Egbert Eich
21
0.55%
3
2.01%
Mika Kahola
20
0.53%
1
0.67%
Eugeni Dodonov
16
0.42%
1
0.67%
Dhinakaran Pandiyan
16
0.42%
1
0.67%
Damien Lespiau
15
0.40%
3
2.01%
Matt Roper
13
0.34%
2
1.34%
Rob Clark
7
0.18%
1
0.67%
David Howells
5
0.13%
1
0.67%
Rodrigo Vivi
4
0.11%
1
0.67%
Tejun Heo
3
0.08%
1
0.67%
Duncan Laurie
3
0.08%
1
0.67%
Eric Anholt
1
0.03%
1
0.67%
Krzysztof Hałasa
1
0.03%
1
0.67%
Total
3793
100.00%
149
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.