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

/*
 * Copyright © 2006 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 <drm/drm_dp_helper.h>
#include <drm/drmP.h>
#include <drm/i915_drm.h>
#include "i915_drv.h"


#define _INTEL_BIOS_PRIVATE
#include "intel_vbt_defs.h"

/**
 * DOC: Video BIOS Table (VBT)
 *
 * The Video BIOS Table, or VBT, provides platform and board specific
 * configuration information to the driver that is not discoverable or available
 * through other means. The configuration is mostly related to display
 * hardware. The VBT is available via the ACPI OpRegion or, on older systems, in
 * the PCI ROM.
 *
 * The VBT consists of a VBT Header (defined as &struct vbt_header), a BDB
 * Header (&struct bdb_header), and a number of BIOS Data Blocks (BDB) that
 * contain the actual configuration information. The VBT Header, and thus the
 * VBT, begins with "$VBT" signature. The VBT Header contains the offset of the
 * BDB Header. The data blocks are concatenated after the BDB Header. The data
 * blocks have a 1-byte Block ID, 2-byte Block Size, and Block Size bytes of
 * data. (Block 53, the MIPI Sequence Block is an exception.)
 *
 * The driver parses the VBT during load. The relevant information is stored in
 * driver private data for ease of use, and the actual VBT is not read after
 * that.
 */


#define	SLAVE_ADDR1	0x70

#define	SLAVE_ADDR2	0x72

/* Get BDB block size given a pointer to Block ID. */


static u32 _get_blocksize(const u8 *block_base)
{
	/* The MIPI Sequence Block v3+ has a separate size field. */
	if (*block_base == BDB_MIPI_SEQUENCE && *(block_base + 3) >= 3)
		return *((const u32 *)(block_base + 4));
	else
		return *((const u16 *)(block_base + 1));
}

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/* Get BDB block size give a pointer to data after Block ID and Block Size. */


static u32 get_blocksize(const void *block_data)
{
	return _get_blocksize(block_data - 3);
}

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static const void *

find_section(const void *_bdb, int section_id)
{
	const struct bdb_header *bdb = _bdb;
	const u8 *base = _bdb;
	int index = 0;
	u32 total, current_size;
	u8 current_id;

	/* skip to first section */
	index += bdb->header_size;
	total = bdb->bdb_size;

	/* walk the sections looking for section_id */
	while (index + 3 < total) {
		current_id = *(base + index);
		current_size = _get_blocksize(base + index);
		index += 3;

		if (index + current_size > total)
			return NULL;

		if (current_id == section_id)
			return base + index;

		index += current_size;
	}

	return NULL;
}

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static void

fill_detail_timing_data(struct drm_display_mode *panel_fixed_mode,
			const struct lvds_dvo_timing *dvo_timing)
{
	panel_fixed_mode->hdisplay = (dvo_timing->hactive_hi << 8) |
		dvo_timing->hactive_lo;
	panel_fixed_mode->hsync_start = panel_fixed_mode->hdisplay +
		((dvo_timing->hsync_off_hi << 8) | dvo_timing->hsync_off_lo);
	panel_fixed_mode->hsync_end = panel_fixed_mode->hsync_start +
		((dvo_timing->hsync_pulse_width_hi << 8) |
			dvo_timing->hsync_pulse_width_lo);
	panel_fixed_mode->htotal = panel_fixed_mode->hdisplay +
		((dvo_timing->hblank_hi << 8) | dvo_timing->hblank_lo);

	panel_fixed_mode->vdisplay = (dvo_timing->vactive_hi << 8) |
		dvo_timing->vactive_lo;
	panel_fixed_mode->vsync_start = panel_fixed_mode->vdisplay +
		((dvo_timing->vsync_off_hi << 4) | dvo_timing->vsync_off_lo);
	panel_fixed_mode->vsync_end = panel_fixed_mode->vsync_start +
		((dvo_timing->vsync_pulse_width_hi << 4) |
			dvo_timing->vsync_pulse_width_lo);
	panel_fixed_mode->vtotal = panel_fixed_mode->vdisplay +
		((dvo_timing->vblank_hi << 8) | dvo_timing->vblank_lo);
	panel_fixed_mode->clock = dvo_timing->clock * 10;
	panel_fixed_mode->type = DRM_MODE_TYPE_PREFERRED;

	if (dvo_timing->hsync_positive)
		panel_fixed_mode->flags |= DRM_MODE_FLAG_PHSYNC;
	else
		panel_fixed_mode->flags |= DRM_MODE_FLAG_NHSYNC;

	if (dvo_timing->vsync_positive)
		panel_fixed_mode->flags |= DRM_MODE_FLAG_PVSYNC;
	else
		panel_fixed_mode->flags |= DRM_MODE_FLAG_NVSYNC;

	panel_fixed_mode->width_mm = (dvo_timing->himage_hi << 8) |
		dvo_timing->himage_lo;
	panel_fixed_mode->height_mm = (dvo_timing->vimage_hi << 8) |
		dvo_timing->vimage_lo;

	/* Some VBTs have bogus h/vtotal values */
	if (panel_fixed_mode->hsync_end > panel_fixed_mode->htotal)
		panel_fixed_mode->htotal = panel_fixed_mode->hsync_end + 1;
	if (panel_fixed_mode->vsync_end > panel_fixed_mode->vtotal)
		panel_fixed_mode->vtotal = panel_fixed_mode->vsync_end + 1;

	drm_mode_set_name(panel_fixed_mode);
}

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static const struct lvds_dvo_timing *

get_lvds_dvo_timing(const struct bdb_lvds_lfp_data *lvds_lfp_data,
		    const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs,
		    int index)
{
	/*
         * the size of fp_timing varies on the different platform.
         * So calculate the DVO timing relative offset in LVDS data
         * entry to get the DVO timing entry
         */

	int lfp_data_size =
		lvds_lfp_data_ptrs->ptr[1].dvo_timing_offset -
		lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset;
	int dvo_timing_offset =
		lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset -
		lvds_lfp_data_ptrs->ptr[0].fp_timing_offset;
	char *entry = (char *)lvds_lfp_data->data + lfp_data_size * index;

	return (struct lvds_dvo_timing *)(entry + dvo_timing_offset);
}

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/* get lvds_fp_timing entry
 * this function may return NULL if the corresponding entry is invalid
 */

static const struct lvds_fp_timing *

get_lvds_fp_timing(const struct bdb_header *bdb,
		   const struct bdb_lvds_lfp_data *data,
		   const struct bdb_lvds_lfp_data_ptrs *ptrs,
		   int index)
{
	size_t data_ofs = (const u8 *)data - (const u8 *)bdb;
	u16 data_size = ((const u16 *)data)[-1]; /* stored in header */
	size_t ofs;

	if (index >= ARRAY_SIZE(ptrs->ptr))
		return NULL;
	ofs = ptrs->ptr[index].fp_timing_offset;
	if (ofs < data_ofs ||
	    ofs + sizeof(struct lvds_fp_timing) > data_ofs + data_size)
		return NULL;
	return (const struct lvds_fp_timing *)((const u8 *)bdb + ofs);
}

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/* Try to find integrated panel data */

static void

parse_lfp_panel_data(struct drm_i915_private *dev_priv,
		     const struct bdb_header *bdb)
{
	const struct bdb_lvds_options *lvds_options;
	const struct bdb_lvds_lfp_data *lvds_lfp_data;
	const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs;
	const struct lvds_dvo_timing *panel_dvo_timing;
	const struct lvds_fp_timing *fp_timing;
	struct drm_display_mode *panel_fixed_mode;
	int panel_type;
	int drrs_mode;
	int ret;

	lvds_options = find_section(bdb, BDB_LVDS_OPTIONS);
	if (!lvds_options)
		return;

	dev_priv->vbt.lvds_dither = lvds_options->pixel_dither;

	ret = intel_opregion_get_panel_type(dev_priv);
	if (ret >= 0) {
		WARN_ON(ret > 0xf);
		panel_type = ret;
		DRM_DEBUG_KMS("Panel type: %d (OpRegion)\n", panel_type);
	} else {
		if (lvds_options->panel_type > 0xf) {
			DRM_DEBUG_KMS("Invalid VBT panel type 0x%x\n",
				      lvds_options->panel_type);
			return;
		}
		panel_type = lvds_options->panel_type;
		DRM_DEBUG_KMS("Panel type: %d (VBT)\n", panel_type);
	}

	dev_priv->vbt.panel_type = panel_type;

	drrs_mode = (lvds_options->dps_panel_type_bits
				>> (panel_type * 2)) & MODE_MASK;
	/*
         * VBT has static DRRS = 0 and seamless DRRS = 2.
         * The below piece of code is required to adjust vbt.drrs_type
         * to match the enum drrs_support_type.
         */
	switch (drrs_mode) {
	case 0:
		dev_priv->vbt.drrs_type = STATIC_DRRS_SUPPORT;
		DRM_DEBUG_KMS("DRRS supported mode is static\n");
		break;
	case 2:
		dev_priv->vbt.drrs_type = SEAMLESS_DRRS_SUPPORT;
		DRM_DEBUG_KMS("DRRS supported mode is seamless\n");
		break;
	default:
		dev_priv->vbt.drrs_type = DRRS_NOT_SUPPORTED;
		DRM_DEBUG_KMS("DRRS not supported (VBT input)\n");
		break;
	}

	lvds_lfp_data = find_section(bdb, BDB_LVDS_LFP_DATA);
	if (!lvds_lfp_data)
		return;

	lvds_lfp_data_ptrs = find_section(bdb, BDB_LVDS_LFP_DATA_PTRS);
	if (!lvds_lfp_data_ptrs)
		return;

	dev_priv->vbt.lvds_vbt = 1;

	panel_dvo_timing = get_lvds_dvo_timing(lvds_lfp_data,
					       lvds_lfp_data_ptrs,
					       panel_type);

	panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
	if (!panel_fixed_mode)
		return;

	fill_detail_timing_data(panel_fixed_mode, panel_dvo_timing);

	dev_priv->vbt.lfp_lvds_vbt_mode = panel_fixed_mode;

	DRM_DEBUG_KMS("Found panel mode in BIOS VBT tables:\n");
	drm_mode_debug_printmodeline(panel_fixed_mode);

	fp_timing = get_lvds_fp_timing(bdb, lvds_lfp_data,
				       lvds_lfp_data_ptrs,
				       panel_type);
	if (fp_timing) {
		/* check the resolution, just to be sure */
		if (fp_timing->x_res == panel_fixed_mode->hdisplay &&
		    fp_timing->y_res == panel_fixed_mode->vdisplay) {
			dev_priv->vbt.bios_lvds_val = fp_timing->lvds_reg_val;
			DRM_DEBUG_KMS("VBT initial LVDS value %x\n",
				      dev_priv->vbt.bios_lvds_val);
		}
	}
}

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Takashi Iwai
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Jesse Barnes
36
9.25%
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11.76%
Chris Wilson
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4.88%
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11.76%
Rodrigo Vivi
10
2.57%
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5.88%
Zhenyu Wang
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1.80%
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11.76%
Yakui Zhao
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0.51%
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11.76%
Eric Anholt
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0.51%
1
5.88%
Jani Nikula
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static void

parse_lfp_backlight(struct drm_i915_private *dev_priv,
		    const struct bdb_header *bdb)
{
	const struct bdb_lfp_backlight_data *backlight_data;
	const struct bdb_lfp_backlight_data_entry *entry;
	int panel_type = dev_priv->vbt.panel_type;

	backlight_data = find_section(bdb, BDB_LVDS_BACKLIGHT);
	if (!backlight_data)
		return;

	if (backlight_data->entry_size != sizeof(backlight_data->data[0])) {
		DRM_DEBUG_KMS("Unsupported backlight data entry size %u\n",
			      backlight_data->entry_size);
		return;
	}

	entry = &backlight_data->data[panel_type];

	dev_priv->vbt.backlight.present = entry->type == BDB_BACKLIGHT_TYPE_PWM;
	if (!dev_priv->vbt.backlight.present) {
		DRM_DEBUG_KMS("PWM backlight not present in VBT (type %u)\n",
			      entry->type);
		return;
	}

	dev_priv->vbt.backlight.type = INTEL_BACKLIGHT_DISPLAY_DDI;
	if (bdb->version >= 191 &&
	    get_blocksize(backlight_data) >= sizeof(*backlight_data)) {
		const struct bdb_lfp_backlight_control_method *method;

		method = &backlight_data->backlight_control[panel_type];
		dev_priv->vbt.backlight.type = method->type;
		dev_priv->vbt.backlight.controller = method->controller;
	}

	dev_priv->vbt.backlight.pwm_freq_hz = entry->pwm_freq_hz;
	dev_priv->vbt.backlight.active_low_pwm = entry->active_low_pwm;
	dev_priv->vbt.backlight.min_brightness = entry->min_brightness;
	DRM_DEBUG_KMS("VBT backlight PWM modulation frequency %u Hz, "
		      "active %s, min brightness %u, level %u, controller %u\n",
		      dev_priv->vbt.backlight.pwm_freq_hz,
		      dev_priv->vbt.backlight.active_low_pwm ? "low" : "high",
		      dev_priv->vbt.backlight.min_brightness,
		      backlight_data->level[panel_type],
		      dev_priv->vbt.backlight.controller);
}

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/* Try to find sdvo panel data */

static void

parse_sdvo_panel_data(struct drm_i915_private *dev_priv,
		      const struct bdb_header *bdb)
{
	const struct lvds_dvo_timing *dvo_timing;
	struct drm_display_mode *panel_fixed_mode;
	int index;

	index = i915.vbt_sdvo_panel_type;
	if (index == -2) {
		DRM_DEBUG_KMS("Ignore SDVO panel mode from BIOS VBT tables.\n");
		return;
	}

	if (index == -1) {
		const struct bdb_sdvo_lvds_options *sdvo_lvds_options;

		sdvo_lvds_options = find_section(bdb, BDB_SDVO_LVDS_OPTIONS);
		if (!sdvo_lvds_options)
			return;

		index = sdvo_lvds_options->panel_type;
	}

	dvo_timing = find_section(bdb, BDB_SDVO_PANEL_DTDS);
	if (!dvo_timing)
		return;

	panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
	if (!panel_fixed_mode)
		return;

	fill_detail_timing_data(panel_fixed_mode, dvo_timing + index);

	dev_priv->vbt.sdvo_lvds_vbt_mode = panel_fixed_mode;

	DRM_DEBUG_KMS("Found SDVO panel mode in BIOS VBT tables:\n");
	drm_mode_debug_printmodeline(panel_fixed_mode);
}

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Jani Nikula
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Eric Anholt
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Rodrigo Vivi
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12.50%
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static int intel_bios_ssc_frequency(struct drm_i915_private *dev_priv,
				    bool alternate)
{
	switch (INTEL_INFO(dev_priv)->gen) {
	case 2:
		return alternate ? 66667 : 48000;
	case 3:
	case 4:
		return alternate ? 100000 : 96000;
	default:
		return alternate ? 100000 : 120000;
	}
}

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static void

parse_general_features(struct drm_i915_private *dev_priv,
		       const struct bdb_header *bdb)
{
	const struct bdb_general_features *general;

	general = find_section(bdb, BDB_GENERAL_FEATURES);
	if (!general)
		return;

	dev_priv->vbt.int_tv_support = general->int_tv_support;
	/* int_crt_support can't be trusted on earlier platforms */
	if (bdb->version >= 155 &&
	    (HAS_DDI(dev_priv) || IS_VALLEYVIEW(dev_priv)))
		dev_priv->vbt.int_crt_support = general->int_crt_support;
	dev_priv->vbt.lvds_use_ssc = general->enable_ssc;
	dev_priv->vbt.lvds_ssc_freq =
		intel_bios_ssc_frequency(dev_priv, general->ssc_freq);
	dev_priv->vbt.display_clock_mode = general->display_clock_mode;
	dev_priv->vbt.fdi_rx_polarity_inverted = general->fdi_rx_polarity_inverted;
	DRM_DEBUG_KMS("BDB_GENERAL_FEATURES int_tv_support %d int_crt_support %d lvds_use_ssc %d lvds_ssc_freq %d display_clock_mode %d fdi_rx_polarity_inverted %d\n",
		      dev_priv->vbt.int_tv_support,
		      dev_priv->vbt.int_crt_support,
		      dev_priv->vbt.lvds_use_ssc,
		      dev_priv->vbt.lvds_ssc_freq,
		      dev_priv->vbt.display_clock_mode,
		      dev_priv->vbt.fdi_rx_polarity_inverted);
}

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Ville Syrjälä
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Kristian Högsberg
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Paulo Zanoni
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Jani Nikula
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Bryan Freed
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Eric Anholt
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static void

parse_general_definitions(struct drm_i915_private *dev_priv,
			  const struct bdb_header *bdb)
{
	const struct bdb_general_definitions *general;

	general = find_section(bdb, BDB_GENERAL_DEFINITIONS);
	if (general) {
		u16 block_size = get_blocksize(general);
		if (block_size >= sizeof(*general)) {
			int bus_pin = general->crt_ddc_gmbus_pin;
			DRM_DEBUG_KMS("crt_ddc_bus_pin: %d\n", bus_pin);
			if (intel_gmbus_is_valid_pin(dev_priv, bus_pin))
				dev_priv->vbt.crt_ddc_pin = bus_pin;
		} else {
			DRM_DEBUG_KMS("BDB_GD too small (%d). Invalid.\n",
				      block_size);
		}
	}
}

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Yakui Zhao
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4.04%
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Daniel Kurtz
2
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Rodrigo Vivi
2
2.02%
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10.00%
Chris Wilson
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static const union child_device_config *

child_device_ptr(const struct bdb_general_definitions *p_defs, int i)
{
	return (const void *) &p_defs->devices[i * p_defs->child_dev_size];
}

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static void

parse_sdvo_device_mapping(struct drm_i915_private *dev_priv,
			  const struct bdb_header *bdb)
{
	struct sdvo_device_mapping *p_mapping;
	const struct bdb_general_definitions *p_defs;
	const struct old_child_dev_config *child; /* legacy */
	int i, child_device_num, count;
	u16	block_size;

	p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
	if (!p_defs) {
		DRM_DEBUG_KMS("No general definition block is found, unable to construct sdvo mapping.\n");
		return;
	}

	/*
         * Only parse SDVO mappings when the general definitions block child
         * device size matches that of the *legacy* child device config
         * struct. Thus, SDVO mapping will be skipped for newer VBT.
         */
	if (p_defs->child_dev_size != sizeof(*child)) {
		DRM_DEBUG_KMS("Unsupported child device size for SDVO mapping.\n");
		return;
	}
	/* get the block size of general definitions */
	block_size = get_blocksize(p_defs);
	/* get the number of child device */
	child_device_num = (block_size - sizeof(*p_defs)) /
		p_defs->child_dev_size;
	count = 0;
	for (i = 0; i < child_device_num; i++) {
		child = &child_device_ptr(p_defs, i)->old;
		if (!child->device_type) {
			/* skip the device block if device type is invalid */
			continue;
		}
		if (child->slave_addr != SLAVE_ADDR1 &&
		    child->slave_addr != SLAVE_ADDR2) {
			/*
                         * If the slave address is neither 0x70 nor 0x72,
                         * it is not a SDVO device. Skip it.
                         */
			continue;
		}
		if (child->dvo_port != DEVICE_PORT_DVOB &&
		    child->dvo_port != DEVICE_PORT_DVOC) {
			/* skip the incorrect SDVO port */
			DRM_DEBUG_KMS("Incorrect SDVO port. Skip it\n");
			continue;
		}
		DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on"
			      " %s port\n",
			      child->slave_addr,
			      (child->dvo_port == DEVICE_PORT_DVOB) ?
			      "SDVOB" : "SDVOC");
		p_mapping = &dev_priv->vbt.sdvo_mappings[child->dvo_port - 1];
		if (!p_mapping->initialized) {
			p_mapping->dvo_port = child->dvo_port;
			p_mapping->slave_addr = child->slave_addr;
			p_mapping->dvo_wiring = child->dvo_wiring;
			p_mapping->ddc_pin = child->ddc_pin;
			p_mapping->i2c_pin = child->i2c_pin;
			p_mapping->initialized = 1;
			DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d\n",
				      p_mapping->dvo_port,
				      p_mapping->slave_addr,
				      p_mapping->dvo_wiring,
				      p_mapping->ddc_pin,
				      p_mapping->i2c_pin);
		} else {
			DRM_DEBUG_KMS("Maybe one SDVO port is shared by "
					 "two SDVO device.\n");
		}
		if (child->slave2_addr) {
			/* Maybe this is a SDVO device with multiple inputs */
			/* And the mapping info is not added */
			DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this"
				" is a SDVO device with multiple inputs.\n");
		}
		count++;
	}

	if (!count) {
		/* No SDVO device info is found */
		DRM_DEBUG_KMS("No SDVO device info is found in VBT\n");
	}
	return;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Yakui Zhao
272
76.40%
2
15.38%
Chris Wilson
32
8.99%
2
15.38%
Jani Nikula
30
8.43%
4
30.77%
Ville Syrjälä
8
2.25%
1
7.69%
Adam Jackson
8
2.25%
2
15.38%
Dave Müller
5
1.40%
1
7.69%
Akshay Joshi
1
0.28%
1
7.69%
Total
356
100.00%
13
100.00%


static void

parse_driver_features(struct drm_i915_private *dev_priv,
		      const struct bdb_header *bdb)
{
	const struct bdb_driver_features *driver;

	driver = find_section(bdb, BDB_DRIVER_FEATURES);
	if (!driver)
		return;

	if (driver->lvds_config == BDB_DRIVER_FEATURE_EDP)
		dev_priv->vbt.edp.support = 1;

	DRM_DEBUG_KMS("DRRS State Enabled:%d\n", driver->drrs_enabled);
	/*
         * If DRRS is not supported, drrs_type has to be set to 0.
         * This is because, VBT is configured in such a way that
         * static DRRS is 0 and DRRS not supported is represented by
         * driver->drrs_enabled=false
         */
	if (!driver->drrs_enabled)
		dev_priv->vbt.drrs_type = DRRS_NOT_SUPPORTED;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Zhenyu Wang
43
53.09%
1
11.11%
Pradeep Bhat
25
30.86%
1
11.11%
Jesse Barnes
5
6.17%
1
11.11%
Jani Nikula
5
6.17%
3
33.33%
Andrew Lutomirski
1
1.23%
1
11.11%
Rodrigo Vivi
1
1.23%
1
11.11%
Chris Wilson
1
1.23%
1
11.11%
Total
81
100.00%
9
100.00%


static void

parse_edp(struct drm_i915_private *dev_priv, const struct bdb_header *bdb)
{
	const struct bdb_edp *edp;
	const struct edp_power_seq *edp_pps;
	const struct edp_link_params *edp_link_params;
	int panel_type = dev_priv->vbt.panel_type;

	edp = find_section(bdb, BDB_EDP);
	if (!edp) {
		if (dev_priv->vbt.edp.support)
			DRM_DEBUG_KMS("No eDP BDB found but eDP panel supported.\n");
		return;
	}

	switch ((edp->color_depth >> (panel_type * 2)) & 3) {
	case EDP_18BPP:
		dev_priv->vbt.edp.bpp = 18;
		break;
	case EDP_24BPP:
		dev_priv->vbt.edp.bpp = 24;
		break;
	case EDP_30BPP:
		dev_priv->vbt.edp.bpp = 30;
		break;
	}

	/* Get the eDP sequencing and link info */
	edp_pps = &edp->power_seqs[panel_type];
	edp_link_params = &edp->link_params[panel_type];

	dev_priv->vbt.edp.pps = *edp_pps;

	switch (edp_link_params->rate) {
	case EDP_RATE_1_62:
		dev_priv->vbt.edp.rate = DP_LINK_BW_1_62;
		break;
	case EDP_RATE_2_7:
		dev_priv->vbt.edp.rate = DP_LINK_BW_2_7;
		break;
	default:
		DRM_DEBUG_KMS("VBT has unknown eDP link rate value %u\n",
			      edp_link_params->rate);
		break;
	}

	switch (edp_link_params->lanes) {
	case EDP_LANE_1:
		dev_priv->vbt.edp.lanes = 1;
		break;
	case EDP_LANE_2:
		dev_priv->vbt.edp.lanes = 2;
		break;
	case EDP_LANE_4:
		dev_priv->vbt.edp.lanes = 4;
		break;
	default:
		DRM_DEBUG_KMS("VBT has unknown eDP lane count value %u\n",
			      edp_link_params->lanes);
		break;
	}

	switch (edp_link_params->preemphasis) {
	case EDP_PREEMPHASIS_NONE:
		dev_priv->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_0;
		break;
	case EDP_PREEMPHASIS_3_5dB:
		dev_priv->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_1;
		break;
	case EDP_PREEMPHASIS_6dB:
		dev_priv->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_2;
		break;
	case EDP_PREEMPHASIS_9_5dB:
		dev_priv->vbt.edp.preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_3;
		break;
	default:
		DRM_DEBUG_KMS("VBT has unknown eDP pre-emphasis value %u\n",
			      edp_link_params->preemphasis);
		break;
	}

	switch (edp_link_params->vswing) {
	case EDP_VSWING_0_4V:
		dev_priv->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_0;
		break;
	case EDP_VSWING_0_6V:
		dev_priv->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_1;
		break;
	case EDP_VSWING_0_8V:
		dev_priv->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_2;
		break;
	case EDP_VSWING_1_2V:
		dev_priv->vbt.edp.vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_3;
		break;
	default:
		DRM_DEBUG_KMS("VBT has unknown eDP voltage swing value %u\n",
			      edp_link_params->vswing);
		break;
	}

	if (bdb->version >= 173) {
		uint8_t vswing;

		/* Don't read from VBT if module parameter has valid value*/
		if (i915.edp_vswing) {
			dev_priv->vbt.edp.low_vswing = i915.edp_vswing == 1;
		} else {
			vswing = (edp->edp_vswing_preemph >> (panel_type * 4)) & 0xF;
			dev_priv->vbt.edp.low_vswing = vswing == 0;
		}
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Jani Nikula
145
29.41%
6
40.00%
Jesse Barnes
110
22.31%
1
6.67%
Zhenyu Wang
89
18.05%
1
6.67%
Sonika Jindal
65
13.18%
3
20.00%
Chris Wilson
56
11.36%
1
6.67%
Rodrigo Vivi
17
3.45%
1
6.67%
Ville Syrjälä
9
1.83%
1
6.67%
Yakui Zhao
2
0.41%
1
6.67%
Total
493
100.00%
15
100.00%


static void

parse_psr(struct drm_i915_private *dev_priv, const struct bdb_header *bdb)
{
	const struct bdb_psr *psr;
	const struct psr_table *psr_table;
	int panel_type = dev_priv->vbt.panel_type;

	psr = find_section(bdb, BDB_PSR);
	if (!psr) {
		DRM_DEBUG_KMS("No PSR BDB found.\n");
		return;
	}

	psr_table = &psr->psr_table[panel_type];

	dev_priv->vbt.psr.full_link = psr_table->full_link;
	dev_priv->vbt.psr.require_aux_wakeup = psr_table->require_aux_to_wakeup;

	/* Allowed VBT values goes from 0 to 15 */
	dev_priv->vbt.psr.idle_frames = psr_table->idle_frames < 0 ? 0 :
		psr_table->idle_frames > 15 ? 15 : psr_table->idle_frames;

	switch (psr_table->lines_to_wait) {
	case 0:
		dev_priv->vbt.psr.lines_to_wait = PSR_0_LINES_TO_WAIT;
		break;
	case 1:
		dev_priv->vbt.psr.lines_to_wait = PSR_1_LINE_TO_WAIT;
		break;
	case 2:
		dev_priv->vbt.psr.lines_to_wait = PSR_4_LINES_TO_WAIT;
		break;
	case 3:
		dev_priv->vbt.psr.lines_to_wait = PSR_8_LINES_TO_WAIT;
		break;
	default:
		DRM_DEBUG_KMS("VBT has unknown PSR lines to wait %u\n",
			      psr_table->lines_to_wait);
		break;
	}

	dev_priv->vbt.psr.tp1_wakeup_time = psr_table->tp1_wakeup_time;
	dev_priv->vbt.psr.tp2_tp3_wakeup_time = psr_table->tp2_tp3_wakeup_time;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Rodrigo Vivi
210
94.59%
1
25.00%
Ville Syrjälä
9
4.05%
1
25.00%
Jani Nikula
3
1.35%
2
50.00%
Total
222
100.00%
4
100.00%


static void

parse_mipi_config(struct drm_i915_private *dev_priv,
		  const struct bdb_header *bdb)
{
	const struct bdb_mipi_config *start;
	const struct mipi_config *config;
	const struct mipi_pps_data *pps;
	int panel_type = dev_priv->vbt.panel_type;

	/* parse MIPI blocks only if LFP type is MIPI */
	if (!intel_bios_is_dsi_present(dev_priv, NULL))
		return;

	/* Initialize this to undefined indicating no generic MIPI support */
	dev_priv->vbt.dsi.panel_id = MIPI_DSI_UNDEFINED_PANEL_ID;

	/* Block #40 is already parsed and panel_fixed_mode is
         * stored in dev_priv->lfp_lvds_vbt_mode
         * resuse this when needed
         */

	/* Parse #52 for panel index used from panel_type already
         * parsed
         */
	start = find_section(bdb, BDB_MIPI_CONFIG);
	if (!start) {
		DRM_DEBUG_KMS("No MIPI config BDB found");
		return;
	}

	DRM_DEBUG_DRIVER("Found MIPI Config block, panel index = %d\n",
								panel_type);

	/*
         * get hold of the correct configuration block and pps data as per
         * the panel_type as index
         */
	config = &start->config[panel_type];
	pps = &start->pps[panel_type];

	/* store as of now full data. Trim when we realise all is not needed */
	dev_priv->vbt.dsi.config = kmemdup(config, sizeof(struct mipi_config), GFP_KERNEL);
	if (!dev_priv->vbt.dsi.config)
		return;

	dev_priv->vbt.dsi.pps = kmemdup(pps, sizeof(struct mipi_pps_data), GFP_KERNEL);
	if (!dev_priv->vbt.dsi.pps) {
		kfree(dev_priv->vbt.dsi.config);
		return;
	}

	/*
         * These fields are introduced from the VBT version 197 onwards,
         * so making sure that these bits are set zero in the previous
         * versions.
         */
	if (dev_priv->vbt.dsi.config->dual_link && bdb->version < 197) {
		dev_priv->vbt.dsi.config->dl_dcs_cabc_ports = 0;
		dev_priv->vbt.dsi.config->dl_dcs_backlight_ports = 0;
	}

	/* We have mandatory mipi config blocks. Initialize as generic panel */
	dev_priv->vbt.dsi.panel_id = MIPI_DSI_GENERIC_PANEL_ID;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Shobhit Kumar
188
73.73%
4
36.36%
Deepak M
45
17.65%
1
9.09%
Jani Nikula
11
4.31%
4
36.36%
Ville Syrjälä
9
3.53%
1
9.09%
Zhenyu Wang
2
0.78%
1
9.09%
Total
255
100.00%
11
100.00%

/* Find the sequence block and size for the given panel. */

static const u8 *

find_panel_sequence_block(const struct bdb_mipi_sequence *sequence,
			  u16 panel_id, u32 *seq_size)
{
	u32 total = get_blocksize(sequence);
	const u8 *data = &sequence->data[0];
	u8 current_id;
	u32 current_size;
	int header_size = sequence->version >= 3 ? 5 : 3;
	int index = 0;
	int i;

	/* skip new block size */
	if (sequence->version >= 3)
		data += 4;

	for (i = 0; i < MAX_MIPI_CONFIGURATIONS && index < total; i++) {
		if (index + header_size > total) {
			DRM_ERROR("Invalid sequence block (header)\n");
			return NULL;
		}

		current_id = *(data + index);
		if (sequence->version >= 3)
			current_size = *((const u32 *)(data + index + 1));
		else
			current_size = *((const u16 *)(data + index + 1));

		index += header_size;

		if (index + current_size > total) {
			DRM_ERROR("Invalid sequence block\n");
			return NULL;
		}

		if (current_id == panel_id) {
			*seq_size = current_size;
			return data + index;
		}

		index += current_size;
	}

	DRM_ERROR("Sequence block detected but no valid configuration\n");

	return NULL;
}

Contributors
Person
Tokens
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CommitProp
Jani Nikula
225
100.00%
2
100.00%
Total
225
100.00%
2
100.00%



static int goto_next_sequence(const u8 *data, int index, int total)
{
	u16 len;

	/* Skip Sequence Byte. */
	for (index = index + 1; index < total; index += len) {
		u8 operation_byte = *(data + index);
		index++;

		switch (operation_byte) {
		case MIPI_SEQ_ELEM_END:
			return index;
		case MIPI_SEQ_ELEM_SEND_PKT:
			if (index + 4 > total)
				return 0;

			len = *((const u16 *)(data + index + 2)) + 4;
			break;
		case MIPI_SEQ_ELEM_DELAY:
			len = 4;
			break;
		case MIPI_SEQ_ELEM_GPIO:
			len = 2;
			break;
		case MIPI_SEQ_ELEM_I2C:
			if (index + 7 > total)
				return 0;
			len = *(data + index + 6) + 7;
			break;
		default:
			DRM_ERROR("Unknown operation byte\n");
			return 0;
		}
	}

	return 0;
}

Contributors
Person
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CommitProp
Jani Nikula
155
100.00%
2
100.00%
Total
155
100.00%
2
100.00%



static int goto_next_sequence_v3(const u8 *data, int index, int total)
{
	int seq_end;
	u16 len;
	u32 size_of_sequence;

	/*
         * Could skip sequence based on Size of Sequence alone, but also do some
         * checking on the structure.
         */
	if (total < 5) {
		DRM_ERROR("Too small sequence size\n");
		return 0;
	}

	/* Skip Sequence Byte. */
	index++;

	/*
         * Size of Sequence. Excludes the Sequence Byte and the size itself,
         * includes MIPI_SEQ_ELEM_END byte, excludes the final MIPI_SEQ_END
         * byte.
         */
	size_of_sequence = *((const uint32_t *)(data + index));
	index += 4;

	seq_end = index + size_of_sequence;
	if (seq_end > total) {
		DRM_ERROR("Invalid sequence size\n");
		return 0;
	}

	for (; index < total; index += len) {
		u8 operation_byte = *(data + index);
		index++;

		if (operation_byte == MIPI_SEQ_ELEM_END) {
			if (index != seq_end) {
				DRM_ERROR("Invalid element structure\n");
				return 0;
			}
			return index;
		}

		len = *(data + index);
		index++;

		/*
                 * FIXME: Would be nice to check elements like for v1/v2 in
                 * goto_next_sequence() above.
                 */
		switch (operation_byte) {
		case MIPI_SEQ_ELEM_SEND_PKT:
		case MIPI_SEQ_ELEM_DELAY:
		case MIPI_SEQ_ELEM_GPIO:
		case MIPI_SEQ_ELEM_I2C:
		case MIPI_SEQ_ELEM_SPI:
		case MIPI_SEQ_ELEM_PMIC:
			break;
		default:
			DRM_ERROR("Unknown operation byte %u\n",
				  operation_byte);
			break;
		}
	}

	return 0;
}

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Jani Nikula
193
100.00%
2
100.00%
Total
193
100.00%
2
100.00%


static void

parse_mipi_sequence(struct drm_i915_private *dev_priv,
		    const struct bdb_header *bdb)
{
	int panel_type = dev_priv->vbt.panel_type;
	const struct bdb_mipi_sequence *sequence;
	const u8 *seq_data;
	u32 seq_size;
	u8 *data;
	int index = 0;

	/* Only our generic panel driver uses the sequence block. */
	if (dev_priv->vbt.dsi.panel_id != MIPI_DSI_GENERIC_PANEL_ID)
		return;

	sequence = find_section(bdb, BDB_MIPI_SEQUENCE);
	if (!sequence) {
		DRM_DEBUG_KMS("No MIPI Sequence found, parsing complete\n");
		return;
	}

	/* Fail gracefully for forward incompatible sequence block. */
	if (sequence->version >= 4) {
		DRM_ERROR("Unable to parse MIPI Sequence Block v%u\n",
			  sequence->version);
		return;
	}

	DRM_DEBUG_DRIVER("Found MIPI sequence block v%u\n", sequence->version);

	seq_data = find_panel_sequence_block(sequence, panel_type, &seq_size);
	if (!seq_data)
		return;

	data = kmemdup(seq_data, seq_size, GFP_KERNEL);
	if (!data)
		return;

	/* Parse the sequences, store pointers to each sequence. */
	for (;;) {
		u8 seq_id = *(data + index);
		if (seq_id == MIPI_SEQ_END)
			break;

		if (seq_id >= MIPI_SEQ_MAX) {
			DRM_ERROR("Unknown sequence %u\n", seq_id);
			goto err;
		}

		/* Log about presence of sequences we won't run. */
		if (seq_id == MIPI_SEQ_TEAR_ON || seq_id == MIPI_SEQ_TEAR_OFF)
			DRM_DEBUG_KMS("Unsupported sequence %u\n", seq_id);

		dev_priv->vbt.dsi.sequence[seq_id] = data + index;

		if (sequence->version >= 3)
			index = goto_next_sequence_v3(data, index, seq_size);
		else
			index = goto_next_sequence(data, index, seq_size);
		if (!index) {
			DRM_ERROR("Invalid sequence %u\n", seq_id);
			goto err;
		}
	}

	dev_priv->vbt.dsi.data = data;
	dev_priv->vbt.dsi.size = seq_size;
	dev_priv->vbt.dsi.seq_version = sequence->version;

	DRM_DEBUG_DRIVER("MIPI related VBT parsing complete\n");
	return;

err:
	kfree(data);
	memset(dev_priv->vbt.dsi.sequence, 0, sizeof(dev_priv->vbt.dsi.sequence));
}

Contributors
Person
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CommitProp
Jani Nikula
191
55.69%
6
60.00%
Shobhit Kumar
133
38.78%
2
20.00%
Rafael Barbalho
10
2.92%
1
10.00%
Ville Syrjälä
9
2.62%
1
10.00%
Total
343
100.00%
10
100.00%



static u8 translate_iboost(u8 val)
{
	static const u8 mapping[] = { 1, 3, 7 }; /* See VBT spec */

	if (val >= ARRAY_SIZE(mapping)) {
		DRM_DEBUG_KMS("Unsupported I_boost value found in VBT (%d), display may not work properly\n", val);
		return 0;
	}
	return mapping[val];
}

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Antti Koskipaa
51
100.00%
1
100.00%
Total
51
100.00%
1
100.00%



static void sanitize_ddc_pin(struct drm_i915_private *dev_priv,
			     enum port port)
{
	const struct ddi_vbt_port_info *info =
		&dev_priv->vbt.ddi_port_info[port];
	enum port p;

	if (!info->alternate_ddc_pin)
		return;

	for_each_port_masked(p, (1 << port) - 1) {
		struct ddi_vbt_port_info *i = &dev_priv->vbt.ddi_port_info[p];

		if (info->alternate_ddc_pin != i->alternate_ddc_pin)
			continue;

		DRM_DEBUG_KMS("port %c trying to use the same DDC pin (0x%x) as port %c, "
			      "disabling port %c DVI/HDMI support\n",
			      port_name(p), i->alternate_ddc_pin,
			      port_name(port), port_name(p));

		/*
                 * If we have multiple ports supposedly sharing the
                 * pin, then dvi/hdmi couldn't exist on the shared
                 * port. Otherwise they share the same ddc bin and
                 * system couldn't communicate with them separately.
                 *
                 * Due to parsing the ports in alphabetical order,
                 * a higher port will always clobber a lower one.
                 */
		i->supports_dvi = false;
		i->supports_hdmi = false;
		i->alternate_ddc_pin = 0;
	}
}

Contributors
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Ville Syrjälä
124
100.00%
1
100.00%
Total
124
100.00%
1
100.00%



static void sanitize_aux_ch(struct drm_i915_private *dev_priv,
			    enum port port)
{
	const struct ddi_vbt_port_info *info =
		&dev_priv->vbt.ddi_port_info[port];
	enum port p;

	if (!info->alternate_aux_channel)
		return;

	for_each_port_masked(p, (1 << port) - 1) {
		struct ddi_vbt_port_info *i = &dev_priv->vbt.ddi_port_info[p];

		if (info->alternate_aux_channel != i->alternate_aux_channel)
			continue;

		DRM_DEBUG_KMS("port %c trying to use the same AUX CH (0x%x) as port %c, "
			      "disabling port %c DP support\n",
			      port_name(p), i->alternate_aux_channel,
			      port_name(port), port_name(p));

		/*
                 * If we have multiple ports supposedlt sharing the
                 * aux channel, then DP couldn't exist on the shared
                 * port. Otherwise they share the same aux channel
                 * and system couldn't communicate with them separately.
                 *
                 * Due to parsing the ports in alphabetical order,
                 * a higher port will always clobber a lower one.
                 */
		i->supports_dp = false;
		i->alternate_aux_channel = 0;
	}
}

Contributors
Person
Tokens
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CommitProp
Ville Syrjälä
118
100.00%
1
100.00%
Total
118
100.00%
1
100.00%



static void parse_ddi_port(struct drm_i915_private *dev_priv, enum port port,
			   const struct bdb_header *bdb)
{
	union child_device_config *it, *child = NULL;
	struct ddi_vbt_port_info *info = &dev_priv->vbt.ddi_port_info[port];
	uint8_t hdmi_level_shift;
	int i, j;
	bool is_dvi, is_hdmi, is_dp, is_edp, is_crt;
	uint8_t aux_channel, ddc_pin;
	/* Each DDI port can have more than one value on the "DVO Port" field,
         * so look for all the possible values for each port and abort if more
         * than one is found. */
	int dvo_ports[][3] = {
		{DVO_PORT_HDMIA, DVO_PORT_DPA, -1},
		{DVO_PORT_HDMIB, DVO_PORT_DPB, -1},
		{DVO_PORT_HDMIC, DVO_PORT_DPC, -1},
		{DVO_PORT_HDMID, DVO_PORT_DPD, -1},
		{DVO_PORT_CRT, DVO_PORT_HDMIE, DVO_PORT_DPE},
        };

	/* Find the child device to use, abort if more than one found. */
	for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
		it = dev_priv->vbt.child_dev + i;

		for (j = 0; j < 3; j++) {
			if (dvo_ports[port][j] == -1)
				break;

			if (it->common.dvo_port == dvo_ports[port][j]) {
				if (child) {
					DRM_DEBUG_KMS("More than one child device for port %c in VBT.\n",
						      port_name(port));
					return;
				}
				child = it;
			}
		}
	}
	if (!child)
		return;

	aux_channel = child->common.aux_channel;
	ddc_pin = child->common.ddc_pin;

	is_dvi = child->common.device_type & DEVICE_TYPE_TMDS_DVI_SIGNALING;
	is_dp = child->common.device_type & DEVICE_TYPE_DISPLAYPORT_OUTPUT;
	is_crt = child->common.device_type & DEVICE_TYPE_ANALOG_OUTPUT;
	is_hdmi = is_dvi && (child->common.device_type & DEVICE_TYPE_NOT_HDMI_OUTPUT) == 0;
	is_edp = is_dp && (child->common.device_type & DEVICE_TYPE_INTERNAL_CONNECTOR);

	info->supports_dvi = is_dvi;
	info->supports_hdmi = is_hdmi;
	info->supports_dp = is_dp;
	info->supports_edp = is_edp;

	DRM_DEBUG_KMS("Port %c VBT info: DP:%d HDMI:%d DVI:%d EDP:%d CRT:%d\n",
		      port_name(port), is_dp, is_hdmi, is_dvi, is_edp, is_crt);

	if (is_edp && is_dvi)
		DRM_DEBUG_KMS("Internal DP port %c is TMDS compatible\n",
			      port_name(port));
	if (is_crt && port != PORT_E)
		DRM_DEBUG_KMS("Port %c is analog\n", port_name(port));
	if (is_crt && (is_dvi || is_dp))
		DRM_DEBUG_KMS("Analog port %c is also DP or TMDS compatible\n",
			      port_name(port));
	if (is_dvi && (port == PORT_A || port == PORT_E))
		DRM_DEBUG_KMS("Port %c is TMDS compatible\n", port_name(port));
	if (!is_dvi && !is_dp && !is_crt)
		DRM_DEBUG_KMS("Port %c is not DP/TMDS/CRT compatible\n",
			      port_name(port));
	if (is_edp && (port == PORT_B || port == PORT_C || port == PORT_E))
		DRM_DEBUG_KMS("Port %c is internal DP\n", port_name(port));

	if (is_dvi) {
		info->alternate_ddc_pin = ddc_pin;

		sanitize_ddc_pin(dev_priv, port);
	}

	if (is_dp) {
		info->alternate_aux_channel = aux_channel;

		sanitize_aux_ch(dev_priv, port);
	}

	if (bdb->version >= 158) {
		/* The VBT HDMI level shift values match the table we have. */
		hdmi_level_shift = child->raw[7] & 0xF;
		DRM_DEBUG_KMS("VBT HDMI level shift for port %c: %d\n",
			      port_name(port),
			      hdmi_level_shift);
		info->hdmi_level_shift = hdmi_level_shift;
	}

	/* Parse the I_boost config for SKL and above */
	if (bdb->version >= 196 && child->common.iboost) {
		info->dp_boost_level = translate_iboost(child->common.iboost_level & 0xF);
		DRM_DEBUG_KMS("VBT (e)DP boost level for port %c: %d\n",
			      port_name(port), info->dp_boost_level);
		info->hdmi_boost_level = translate_iboost(child->common.iboost_level >> 4);
		DRM_DEBUG_KMS("VBT HDMI boost level for port %c: %d\n",
			      port_name(port), info->hdmi_boost_level);
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Paulo Zanoni
493
78.50%
4
26.67%
Antti Koskipaa
74
11.78%
1
6.67%
Rodrigo Vivi
23
3.66%
2
13.33%
Xiong Zhang
15
2.39%
1
6.67%
Ville Syrjälä
14
2.23%
3
20.00%
Imre Deak
6
0.96%
1
6.67%
Jani Nikula
1
0.16%
1
6.67%
Masanari Iida
1
0.16%
1
6.67%
Shubhangi Shrivastava
1
0.16%
1
6.67%
Total
628
100.00%
15
100.00%



static void parse_ddi_ports(struct drm_i915_private *dev_priv,
			    const struct bdb_header *bdb)
{
	enum port port;

	if (!HAS_DDI(dev_priv))
		return;

	if (!dev_priv->vbt.child_dev_num)
		return;

	if (bdb->version < 155)
		return;

	for (port = PORT_A; port < I915_MAX_PORTS; port++)
		parse_ddi_port(dev_priv, port, bdb);
}

Contributors
Person
Tokens
Prop
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CommitProp
Paulo Zanoni
69
97.18%
1
33.33%
Jani Nikula
2
2.82%
2
66.67%
Total
71
100.00%
3
100.00%


static void

parse_device_mapping(struct drm_i915_private *dev_priv,
		     const struct bdb_header *bdb)
{
	const struct bdb_general_definitions *p_defs;
	const union child_device_config *p_child;
	union child_device_config *child_dev_ptr;
	int i, child_device_num, count;
	u8 expected_size;
	u16 block_size;

	p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
	if (!p_defs) {
		DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n");
		return;
	}
	if (bdb->version < 106) {
		expected_size = 22;
	} else if (bdb->version < 111) {
		expected_size = 27;
	} else if (bdb->version < 195) {
		BUILD_BUG_ON(sizeof(struct old_child_dev_config) != 33);
		expected_size = sizeof(struct old_child_dev_config);
	} else if (bdb->version == 195) {
		expected_size = 37;
	} else if (bdb->version <= 197) {
		expected_size = 38;
	} else {
		expected_size = 38;
		BUILD_BUG_ON(sizeof(*p_child) < 38);
		DRM_DEBUG_DRIVER("Expected child device config size for VBT version %u not known; assuming %u\n",
				 bdb->version, expected_size);
	}

	/* Flag an error for unexpected size, but continue anyway. */
	if (p_defs->child_dev_size != expected_size)
		DRM_ERROR("Unexpected child device config size %u (expected %u for VBT version %u)\n",
			  p_defs->child_dev_size, expected_size, bdb->version);

	/* The legacy sized child device config is the minimum we need. */
	if (p_defs->child_dev_size < sizeof(struct old_child_dev_config)) {
		DRM_DEBUG_KMS("Child device config size %u is too small.\n",
			      p_defs->child_dev_size);
		return;
	}

	/* get the block size of general definitions */
	block_size = get_blocksize(p_defs);
	/* get the number of child device */
	child_device_num = (block_size - sizeof(*p_defs)) /
				p_defs->child_dev_size;
	count = 0;
	/* get the number of child device that is present */
	for (i = 0; i < child_device_num; i++) {
		p_child = child_device_ptr(p_defs, i);
		if (!p_child->common.device_type) {
			/* skip the device block if device type is invalid */
			continue;
		}
		count++;
	}
	if (!count) {
		DRM_DEBUG_KMS("no child dev is parsed from VBT\n");
		return;
	}
	dev_priv->vbt.child_dev = kcalloc(count, sizeof(*p_child), GFP_KERNEL);
	if (!dev_priv->vbt.child_dev) {
		DRM_DEBUG_KMS("No memory space for child device\n");
		return;
	}

	dev_priv->vbt.child_dev_num = count;
	count = 0;
	for (i = 0; i < child_device_num; i++) {
		p_child = child_device_ptr(p_defs, i);
		if (!p_child->common.device_type) {
			/* skip the device block if device type is invalid */
			continue;
		}

		child_dev_ptr = dev_priv->vbt.child_dev + count;
		count++;

		/*
                 * Copy as much as we know (sizeof) and is available
                 * (child_dev_size) of the child device. Accessing the data must
                 * depend on VBT version.
                 */
		memcpy(child_dev_ptr, p_child,
		       min_t(size_t, p_defs->child_dev_size, sizeof(*p_child)));

		/*
                 * copied full block, now init values when they are not
                 * available in current version
                 */
		if (bdb->version < 196) {
			/* Set default values for bits added from v196 */
			child_dev_ptr->common.iboost = 0;
			child_dev_ptr->common.hpd_invert = 0;
		}

		if (bdb->version < 192)
			child_dev_ptr->common.lspcon = 0;
	}
	return;
}

Contributors
Person
Tokens
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CommitProp
Yakui Zhao
231
47.63%
1
6.25%
David Weinehall
103
21.24%
1
6.25%
Ville Syrjälä
75
15.46%
3
18.75%
Shubhangi Shrivastava
44
9.07%
1
6.25%
Jani Nikula
11
2.27%
3
18.75%
Rodrigo Vivi
8
1.65%
1
6.25%
Paulo Zanoni
5
1.03%
1
6.25%
Thomas Meyer
3
0.62%
1
6.25%
Shobhit Kumar
2
0.41%
1
6.25%
Chris Wilson
2
0.41%
2
12.50%
Akshay Joshi
1
0.21%
1
6.25%
Total
485
100.00%
16
100.00%


static void

init_vbt_defaults(struct drm_i915_private *dev_priv)
{
	enum port port;

	dev_priv->vbt.crt_ddc_pin = GMBUS_PIN_VGADDC;

	/* Default to having backlight */
	dev_priv->vbt.backlight.present = true;

	/* LFP panel data */
	dev_priv->vbt.lvds_dither = 1;
	dev_priv->vbt.lvds_vbt = 0;

	/* SDVO panel data */
	dev_priv->vbt.sdvo_lvds_vbt_mode = NULL;

	/* general features */
	dev_priv->vbt.int_tv_support = 1;
	dev_priv->vbt.int_crt_support = 1;

	/* Default to using SSC */
	dev_priv->vbt.lvds_use_ssc = 1;
	/*
         * Core/SandyBridge/IvyBridge use alternative (120MHz) reference
         * clock for LVDS.
         */
	dev_priv->vbt.lvds_ssc_freq = intel_bios_ssc_frequency(dev_priv,
			!HAS_PCH_SPLIT(dev_priv));
	DRM_DEBUG_KMS("Set default to SSC at %d kHz\n", dev_priv->vbt.lvds_ssc_freq);

	for (port = PORT_A; port < I915_MAX_PORTS; port++) {
		struct ddi_vbt_port_info *info =
			&dev_priv->vbt.ddi_port_info[port];

		info->hdmi_level_shift = HDMI_LEVEL_SHIFT_UNKNOWN;

		info->supports_dvi = (port != PORT_A && port != PORT_E);
		info->supports_hdmi = info->supports_dvi;
		info->supports_dp = (port != PORT_E);
	}
}

Contributors
Person
Tokens
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CommitProp
Paulo Zanoni
71
38.80%
2
16.67%
Simon Que
54
29.51%
1
8.33%
Bryan Freed
18
9.84%
1
8.33%
Rodrigo Vivi
18
9.84%
1
8.33%
Jani Nikula
14
7.65%
3
25.00%
Duncan Laurie
5
2.73%
1
8.33%
Keith Packard
1
0.55%
1
8.33%
Ville Syrjälä
1
0.55%
1
8.33%
Damien Lespiau
1
0.55%
1
8.33%
Total
183
100.00%
12
100.00%



static const struct bdb_header *get_bdb_header(const struct vbt_header *vbt)
{
	const void *_vbt = vbt;

	return _vbt + vbt->bdb_offset;
}

Contributors
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Jani Nikula
25
86.21%
2
66.67%
Chris Wilson
4
13.79%
1
33.33%
Total
29
100.00%
3
100.00%

/**
 * intel_bios_is_valid_vbt - does the given buffer contain a valid VBT
 * @buf:        pointer to a buffer to validate
 * @size:       size of the buffer
 *
 * Returns true on valid VBT.
 */


bool intel_bios_is_valid_vbt(const void *buf, size_t size)
{
	const struct vbt_header *vbt = buf;
	const struct bdb_header *bdb;

	if (!vbt)
		return false;

	if (sizeof(struct vbt_header) > size) {
		DRM_DEBUG_DRIVER("VBT header incomplete\n");
		return false;
	}

	if (memcmp(vbt->signature, "$VBT", 4)) {
		DRM_DEBUG_DRIVER("VBT invalid signature\n");
		return false;
	}

	if (range_overflows_t(size_t,
			      vbt->bdb_offset,
			      sizeof(struct bdb_header),
			      size)) {
		DRM_DEBUG_DRIVER("BDB header incomplete\n");
		return false;
	}

	bdb = get_bdb_header(vbt);
	if (range_overflows_t(size_t, vbt->bdb_offset, bdb->bdb_size, size)) {
		DRM_DEBUG_DRIVER("BDB incomplete\n");
		return false;
	}

	return vbt;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Chris Wilson
109
75.69%
2
40.00%
Jani Nikula
35
24.31%
3
60.00%
Total
144
100.00%
5
100.00%



static const struct vbt_header *find_vbt(void __iomem *bios, size_t size)
{
	size_t i;

	/* Scour memory looking for the VBT signature. */
	for (i = 0; i + 4 < size; i++) {
		void *vbt;

		if (ioread32(bios + i) != *((const u32 *) "$VBT"))
			continue;

		/*
                 * This is the one place where we explicitly discard the address
                 * space (__iomem) of the BIOS/VBT.
                 */
		vbt = (void __force *) bios + i;
		if (intel_bios_is_valid_vbt(vbt, size - i))
			return vbt;

		break;
	}

	return NULL;
}

Contributors
Person
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CommitProp
Jani Nikula
86
93.48%
4
80.00%
Dan J Williams
6
6.52%
1
20.00%
Total
92
100.00%
5
100.00%

/**
 * intel_bios_init - find VBT and initialize settings from the BIOS
 * @dev_priv: i915 device instance
 *
 * Loads the Video BIOS and checks that the VBT exists.  Sets scratch registers
 * to appropriate values.
 *
 * Returns 0 on success, nonzero on failure.
 */

int

intel_bios_init(struct drm_i915_private *dev_priv)
{
	struct pci_dev *pdev = dev_priv->drm.pdev;
	const struct vbt_header *vbt = dev_priv->opregion.vbt;
	const struct bdb_header *bdb;
	u8 __iomem *bios = NULL;

	if (HAS_PCH_NOP(dev_priv))
		return -ENODEV;

	init_vbt_defaults(dev_priv);

	if (!vbt) {
		size_t size;

		bios = pci_map_rom(pdev, &size);
		if (!bios)
			return -1;

		vbt = find_vbt(bios, size);
		if (!vbt) {
			pci_unmap_rom(pdev, bios);
			return -1;
		}

		DRM_DEBUG_KMS("Found valid VBT in PCI ROM\n");
	}

	bdb = get_bdb_header(vbt);

	DRM_DEBUG_KMS("VBT signature \"%.*s\", BDB version %d\n",
		      (int)sizeof(vbt->signature), vbt->signature, bdb->version);

	/* Grab useful general definitions */
	parse_general_features(dev_priv, bdb);
	parse_general_definitions(dev_priv, bdb);
	parse_lfp_panel_data(dev_priv, bdb);
	parse_lfp_backlight(dev_priv, bdb);
	parse_sdvo_panel_data(dev_priv, bdb);
	parse_sdvo_device_mapping(dev_priv, bdb);
	parse_device_mapping(dev_priv, bdb);
	parse_driver_features(dev_priv, bdb);
	parse_edp(dev_priv, bdb);
	parse_psr(dev_priv, bdb);
	parse_mipi_config(dev_priv, bdb);
	parse_mipi_sequence(dev_priv, bdb);
	parse_ddi_ports(dev_priv, bdb);

	if (bios)
		pci_unmap_rom(pdev, bios);

	return 0;
}

Contributors
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Tokens
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Commits
CommitProp
Jesse Barnes
86
33.20%
1
3.70%
Jani Nikula
74
28.57%
10
37.04%
Chris Wilson
22
8.49%
4
14.81%
Zhenyu Wang
14
5.41%
2
7.41%
Yakui Zhao
14
5.41%
2
7.41%
Ben Widawsky
10
3.86%
1
3.70%
Ma Ling
8
3.09%
1
3.70%
Rodrigo Vivi
7
2.70%
1
3.70%
Paulo Zanoni
7
2.70%
1
3.70%
Dave Müller
7
2.70%
1
3.70%
Shobhit Kumar
6
2.32%
1
3.70%
Simon Que
3
1.16%
1
3.70%
Dan Carpenter
1
0.39%
1
3.70%
Total
259
100.00%
27
100.00%

/**
 * intel_bios_is_tv_present - is integrated TV present in VBT
 * @dev_priv:   i915 device instance
 *
 * Return true if TV is present. If no child devices were parsed from VBT,
 * assume TV is present.
 */


bool intel_bios_is_tv_present(struct drm_i915_private *dev_priv)
{
	union child_device_config *p_child;
	int i;

	if (!dev_priv->vbt.int_tv_support)
		return false;

	if (!dev_priv->vbt.child_dev_num)
		return true;

	for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
		p_child = dev_priv->vbt.child_dev + i;
		/*
                 * If the device type is not TV, continue.
                 */
		switch (p_child->old.device_type) {
		case DEVICE_TYPE_INT_TV:
		case DEVICE_TYPE_TV:
		case DEVICE_TYPE_TV_SVIDEO_COMPOSITE:
			break;
		default:
			continue;
		}
		/* Only when the addin_offset is non-zero, it is regarded
                 * as present.
                 */
		if (p_child->old.addin_offset)
			return true;
	}

	return false;
}

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Jani Nikula
109
100.00%
1
100.00%
Total
109
100.00%
1
100.00%

/**
 * intel_bios_is_lvds_present - is LVDS present in VBT
 * @dev_priv:   i915 device instance
 * @i2c_pin:    i2c pin for LVDS if present
 *
 * Return true if LVDS is present. If no child devices were parsed from VBT,
 * assume LVDS is present.
 */


bool intel_bios_is_lvds_present(struct drm_i915_private *dev_priv, u8 *i2c_pin)
{
	int i;

	if (!dev_priv->vbt.child_dev_num)
		return true;

	for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
		union child_device_config *uchild = dev_priv->vbt.child_dev + i;
		struct old_child_dev_config *child = &uchild->old;

		/* If the device type is not LFP, continue.
                 * We have to check both the new identifiers as well as the
                 * old for compatibility with some BIOSes.
                 */
		if (child->device_type != DEVICE_TYPE_INT_LFP &&
		    child->device_type != DEVICE_TYPE_LFP)
			continue;

		if (intel_gmbus_is_valid_pin(dev_priv, child->i2c_pin))
			*i2c_pin = child->i2c_pin;

		/* However, we cannot trust the BIOS writers to populate
                 * the VBT correctly.  Since LVDS requires additional
                 * information from AIM blocks, a non-zero addin offset is
                 * a good indicator that the LVDS is actually present.
                 */
		if (child->addin_offset)
			return true;

		/* But even then some BIOS writers perform some black magic
                 * and instantiate the device without reference to any
                 * additional data.  Trust that if the VBT was written into
                 * the OpRegion then they have validated the LVDS's existence.
                 */
		if (dev_priv->opregion.vbt)
			return true;
	}

	return false;
}

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/**
 * intel_bios_is_port_present - is the specified digital port present
 * @dev_priv:   i915 device instance
 * @port:       port to check
 *
 * Return true if the device in %port is present.
 */


bool intel_bios_is_port_present(struct drm_i915_private *dev_priv, enum port port)
{
	static const struct {
		u16 dp, hdmi;
	} port_mapping[] = {
		[PORT_B] = { DVO_PORT_DPB, DVO_PORT_HDMIB, },
		[PORT_C] = { DVO_PORT_DPC, DVO_PORT_HDMIC, },
		[PORT_D] = { DVO_PORT_DPD, DVO_PORT_HDMID, },
		[PORT_E] = { DVO_PORT_DPE, DVO_PORT_HDMIE, },
        };
	int i;

	/* FIXME maybe deal with port A as well? */
	if (WARN_ON(port == PORT_A) || port >= ARRAY_SIZE(port_mapping))
		return false;

	if (!dev_priv->vbt.child_dev_num)
		return false;

	for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
		const union child_device_config *p_child =
			&dev_priv->vbt.child_dev[i];
		if ((p_child->common.dvo_port == port_mapping[port].dp ||
		     p_child->common.dvo_port == port_mapping[port].hdmi) &&
		    (p_child->common.device_type & (DEVICE_TYPE_TMDS_DVI_SIGNALING |
						    DEVICE_TYPE_DISPLAYPORT_OUTPUT)))
			return true;
	}

	return false;
}

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/**
 * intel_bios_is_port_edp - is the device in given port eDP
 * @dev_priv:   i915 device instance
 * @port:       port to check
 *
 * Return true if the device in %port is eDP.
 */


bool intel_bios_is_port_edp(struct drm_i915_private *dev_priv, enum port port)
{
	union child_device_config *p_child;
	static const short port_mapping[] = {
		[PORT_B] = DVO_PORT_DPB,
		[PORT_C] = DVO_PORT_DPC,
		[PORT_D] = DVO_PORT_DPD,
		[PORT_E] = DVO_PORT_DPE,
        };
	int i;

	if (HAS_DDI(dev_priv))
		return dev_priv->vbt.ddi_port_info[port].supports_edp;

	if (!dev_priv->vbt.child_dev_num)
		return false;

	for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
		p_child = dev_priv->vbt.child_dev + i;

		if (p_child->common.dvo_port == port_mapping[port] &&
		    (p_child->common.device_type & DEVICE_TYPE_eDP_BITS) ==
		    (DEVICE_TYPE_eDP & DEVICE_TYPE_eDP_BITS))
			return true;
	}

	return false;
}

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static bool child_dev_is_dp_dual_mode(const union child_device_config *p_child,
				      enum port port)
{
	static const struct {
		u16 dp, hdmi;
	} port_mapping[] = {
		/*
                 * Buggy VBTs may declare DP ports as having
                 * HDMI type dvo_port :( So let's check both.
                 */
		[PORT_B] = { DVO_PORT_DPB, DVO_PORT_HDMIB, },
		[PORT_C] = { DVO_PORT_DPC, DVO_PORT_HDMIC, },
		[PORT_D] = { DVO_PORT_DPD, DVO_PORT_HDMID, },
		[PORT_E] = { DVO_PORT_DPE, DVO_PORT_HDMIE, },
        };

	if (port == PORT_A || port >= ARRAY_SIZE(port_mapping))
		return false;

	if ((p_child->common.device_type & DEVICE_TYPE_DP_DUAL_MODE_BITS) !=
	    (DEVICE_TYPE_DP_DUAL_MODE & DEVICE_TYPE_DP_DUAL_MODE_BITS))
		return false;

	if (p_child->common.dvo_port == port_mapping[port].dp)
		return true;

	/* Only accept a HDMI dvo_port as DP++ if it has an AUX channel */
	if (p_child->common.dvo_port == port_mapping[port].hdmi &&
	    p_child->common.aux_channel != 0)
		return true;

	return false;
}

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bool intel_bios_is_port_dp_dual_mode(struct drm_i915_private *dev_priv,
				     enum port port)
{
	int i;

	for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
		const union child_device_config *p_child =
			&dev_priv->vbt.child_dev[i];

		if (child_dev_is_dp_dual_mode(p_child, port))
			return true;
	}

	return false;
}

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/**
 * intel_bios_is_dsi_present - is DSI present in VBT
 * @dev_priv:   i915 device instance
 * @port:       port for DSI if present
 *
 * Return true if DSI is present, and return the port in %port.
 */


bool intel_bios_is_dsi_present(struct drm_i915_private *dev_priv,
			       enum port *port)
{
	union child_device_config *p_child;
	u8 dvo_port;
	int i;

	for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
		p_child = dev_priv->vbt.child_dev + i;

		if (!(p_child->common.device_type & DEVICE_TYPE_MIPI_OUTPUT))
			continue;

		dvo_port = p_child->common.dvo_port;

		switch (dvo_port) {
		case DVO_PORT_MIPIA:
		case DVO_PORT_MIPIC:
			if (port)
				*port = dvo_port - DVO_PORT_MIPIA;
			return true;
		case DVO_PORT_MIPIB:
		case DVO_PORT_MIPID:
			DRM_DEBUG_KMS("VBT has unsupported DSI port %c\n",
				      port_name(dvo_port - DVO_PORT_MIPIA));
			break;
		}
	}

	return false;
}

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/**
 * intel_bios_is_port_hpd_inverted - is HPD inverted for %port
 * @dev_priv:   i915 device instance
 * @port:       port to check
 *
 * Return true if HPD should be inverted for %port.
 */

bool

intel_bios_is_port_hpd_inverted(struct drm_i915_private *dev_priv,
				enum port port)
{
	int i;

	if (WARN_ON_ONCE(!IS_GEN9_LP(dev_priv)))
		return false;

	for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
		if (!dev_priv->vbt.child_dev[i].common.hpd_invert)
			continue;

		switch (dev_priv->vbt.child_dev[i].common.dvo_port) {
		case DVO_PORT_DPA:
		case DVO_PORT_HDMIA:
			if (port == PORT_A)
				return true;
			break;
		case DVO_PORT_DPB:
		case DVO_PORT_HDMIB:
			if (port == PORT_B)
				return true;
			break;
		case DVO_PORT_DPC:
		case DVO_PORT_HDMIC:
			if (port == PORT_C)
				return true;
			break;
		default:
			break;
		}
	}

	return false;
}

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/**
 * intel_bios_is_lspcon_present - if LSPCON is attached on %port
 * @dev_priv:   i915 device instance
 * @port:       port to check
 *
 * Return true if LSPCON is present on this port
 */

bool

intel_bios_is_lspcon_present(struct drm_i915_private *dev_priv,
				enum port port)
{
	int i;

	if (!HAS_LSPCON(dev_priv))
		return false;

	for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
		if (!dev_priv->vbt.child_dev[i].common.lspcon)
			continue;

		switch (dev_priv->vbt.child_dev[i].common.dvo_port) {
		case DVO_PORT_DPA:
		case DVO_PORT_HDMIA:
			if (port == PORT_A)
				return true;
			break;
		case DVO_PORT_DPB:
		case DVO_PORT_HDMIB:
			if (port == PORT_B)
				return true;
			break;
		case DVO_PORT_DPC:
		case DVO_PORT_HDMIC:
			if (port == PORT_C)
				return true;
			break;
		case DVO_PORT_DPD:
		case DVO_PORT_HDMID:
			if (port == PORT_D)
				return true;
			break;
		default:
			break;
		}
	}

	return false;
}
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10.22%
Paulo Zanoni
658
8.57%
6
4.38%
Jesse Barnes
586
7.63%
5
3.65%
Yakui Zhao
533
6.94%
4
2.92%
Chris Wilson
392
5.11%
12
8.76%
Shobhit Kumar
329
4.29%
4
2.92%
Rodrigo Vivi
322
4.19%
4
2.92%
Ma Ling
209
2.72%
1
0.73%
Takashi Iwai
195
2.54%
1
0.73%
Shubhangi Shrivastava
182
2.37%
2
1.46%
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155
2.02%
3
2.19%
Shashank Sharma
151
1.97%
1
0.73%
Antti Koskipaa
125
1.63%
1
0.73%
Deepak M
104
1.35%
2
1.46%
David Weinehall
103
1.34%
1
0.73%
Pradeep Bhat
98
1.28%
1
0.73%
Dave Müller
98
1.28%
1
0.73%
Bryan Freed
68
0.89%
1
0.73%
Sonika Jindal
65
0.85%
3
2.19%
Simon Que
57
0.74%
1
0.73%
Adam Jackson
46
0.60%
3
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Keith Packard
34
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3
2.19%
Vincente Tsou
33
0.43%
1
0.73%
Imre Deak
25
0.33%
1
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Vidya Srinivas
21
0.27%
1
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17
0.22%
1
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15
0.20%
1
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Xiong Zhang
15
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1
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Ben Widawsky
10
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1
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Rafael Barbalho
10
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1
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Eric Anholt
6
0.08%
2
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Dan J Williams
6
0.08%
1
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Duncan Laurie
5
0.07%
1
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Thomas Meyer
3
0.04%
1
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Daniel Kurtz
2
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1
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2
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2
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1
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1
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1
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1
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1
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1
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1
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1
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1
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Directory: drivers/gpu/drm/i915

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