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-rw-r--r--linux-core/drm_edid.c737
1 files changed, 0 insertions, 737 deletions
diff --git a/linux-core/drm_edid.c b/linux-core/drm_edid.c
deleted file mode 100644
index 07894720..00000000
--- a/linux-core/drm_edid.c
+++ /dev/null
@@ -1,737 +0,0 @@
-/*
- * Copyright (c) 2006 Luc Verhaegen (quirks list)
- * Copyright (c) 2007 Intel Corporation
- * Jesse Barnes <jesse.barnes@intel.com>
- *
- * DDC probing routines (drm_ddc_read & drm_do_probe_ddc_edid) originally from
- * FB layer.
- * Copyright (C) 2006 Dennis Munsie <dmunsie@cecropia.com>
- *
- * 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, sub license,
- * 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 NON-INFRINGEMENT. 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.
- */
-#include <linux/kernel.h>
-#include <linux/i2c.h>
-#include <linux/i2c-algo-bit.h>
-#include "drmP.h"
-#include "drm_edid.h"
-
-/*
- * TODO:
- * - support EDID 1.4
- * - port quirks from X server code
- */
-
-/*
- * EDID blocks out in the wild have a variety of bugs, try to collect
- * them here (note that userspace may work around broken monitors first,
- * but fixes should make their way here so that the kernel "just works"
- * on as many displays as possible).
- */
-
-/* First detailed mode wrong, use largest 60Hz mode */
-#define EDID_QUIRK_PREFER_LARGE_60 (1 << 0)
-/* Reported 135MHz pixel clock is too high, needs adjustment */
-#define EDID_QUIRK_135_CLOCK_TOO_HIGH (1 << 1)
-/* Prefer the largest mode at 75 Hz */
-#define EDID_QUIRK_PREFER_LARGE_75 (1 << 2)
-/* Detail timing is in cm not mm */
-#define EDID_QUIRK_DETAILED_IN_CM (1 << 3)
-/* Detailed timing descriptors have bogus size values, so just take the
- * maximum size and use that.
- */
-#define EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE (1 << 4)
-/* Monitor forgot to set the first detailed is preferred bit. */
-#define EDID_QUIRK_FIRST_DETAILED_PREFERRED (1 << 5)
-/* use +hsync +vsync for detailed mode */
-#define EDID_QUIRK_DETAILED_SYNC_PP (1 << 6)
-
-static struct edid_quirk {
- char *vendor;
- int product_id;
- u32 quirks;
-} edid_quirk_list[] = {
- /* Acer AL1706 */
- { "ACR", 44358, EDID_QUIRK_PREFER_LARGE_60 },
- /* Acer F51 */
- { "API", 0x7602, EDID_QUIRK_PREFER_LARGE_60 },
- /* Unknown Acer */
- { "ACR", 2423, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
-
- /* Belinea 10 15 55 */
- { "MAX", 1516, EDID_QUIRK_PREFER_LARGE_60 },
- { "MAX", 0x77e, EDID_QUIRK_PREFER_LARGE_60 },
-
- /* Envision Peripherals, Inc. EN-7100e */
- { "EPI", 59264, EDID_QUIRK_135_CLOCK_TOO_HIGH },
-
- /* Funai Electronics PM36B */
- { "FCM", 13600, EDID_QUIRK_PREFER_LARGE_75 |
- EDID_QUIRK_DETAILED_IN_CM },
-
- /* LG Philips LCD LP154W01-A5 */
- { "LPL", 0, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE },
- { "LPL", 0x2a00, EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE },
-
- /* Philips 107p5 CRT */
- { "PHL", 57364, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
-
- /* Proview AY765C */
- { "PTS", 765, EDID_QUIRK_FIRST_DETAILED_PREFERRED },
-
- /* Samsung SyncMaster 205BW. Note: irony */
- { "SAM", 541, EDID_QUIRK_DETAILED_SYNC_PP },
- /* Samsung SyncMaster 22[5-6]BW */
- { "SAM", 596, EDID_QUIRK_PREFER_LARGE_60 },
- { "SAM", 638, EDID_QUIRK_PREFER_LARGE_60 },
-};
-
-
-/* Valid EDID header has these bytes */
-static u8 edid_header[] = { 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 };
-
-/**
- * edid_is_valid - sanity check EDID data
- * @edid: EDID data
- *
- * Sanity check the EDID block by looking at the header, the version number
- * and the checksum. Return 0 if the EDID doesn't check out, or 1 if it's
- * valid.
- */
-static bool edid_is_valid(struct edid *edid)
-{
- int i;
- u8 csum = 0;
- u8 *raw_edid = (u8 *)edid;
-
- if (memcmp(edid->header, edid_header, sizeof(edid_header)))
- goto bad;
- if (edid->version != 1) {
- DRM_ERROR("EDID has major version %d, instead of 1\n", edid->version);
- goto bad;
- }
- if (edid->revision <= 0 || edid->revision > 3) {
- DRM_ERROR("EDID has minor version %d, which is not between 0-3\n", edid->revision);
- goto bad;
- }
-
- for (i = 0; i < EDID_LENGTH; i++)
- csum += raw_edid[i];
- if (csum) {
- DRM_ERROR("EDID checksum is invalid, remainder is %d\n", csum);
- goto bad;
- }
-
- return 1;
-
-bad:
- if (raw_edid) {
- DRM_ERROR("Raw EDID:\n");
- print_hex_dump_bytes(KERN_ERR, DUMP_PREFIX_NONE, raw_edid, EDID_LENGTH);
- printk("\n");
- }
- return 0;
-}
-
-/**
- * edid_vendor - match a string against EDID's obfuscated vendor field
- * @edid: EDID to match
- * @vendor: vendor string
- *
- * Returns true if @vendor is in @edid, false otherwise
- */
-static bool edid_vendor(struct edid *edid, char *vendor)
-{
- char edid_vendor[3];
-
- edid_vendor[0] = ((edid->mfg_id[0] & 0x7c) >> 2) + '@';
- edid_vendor[1] = (((edid->mfg_id[0] & 0x3) << 3) |
- ((edid->mfg_id[1] & 0xe0) >> 5)) + '@';
- edid_vendor[2] = (edid->mfg_id[2] & 0x1f) + '@';
-
- return !strncmp(edid_vendor, vendor, 3);
-}
-
-/**
- * edid_get_quirks - return quirk flags for a given EDID
- * @edid: EDID to process
- *
- * This tells subsequent routines what fixes they need to apply.
- */
-static u32 edid_get_quirks(struct edid *edid)
-{
- struct edid_quirk *quirk;
- int i;
-
- for (i = 0; i < ARRAY_SIZE(edid_quirk_list); i++) {
- quirk = &edid_quirk_list[i];
-
- if (edid_vendor(edid, quirk->vendor) &&
- (EDID_PRODUCT_ID(edid) == quirk->product_id))
- return quirk->quirks;
- }
-
- return 0;
-}
-
-#define MODE_SIZE(m) ((m)->hdisplay * (m)->vdisplay)
-#define MODE_REFRESH_DIFF(m,r) (abs((m)->vrefresh - target_refresh))
-
-
-/**
- * edid_fixup_preferred - set preferred modes based on quirk list
- * @connector: has mode list to fix up
- * @quirks: quirks list
- *
- * Walk the mode list for @connector, clearing the preferred status
- * on existing modes and setting it anew for the right mode ala @quirks.
- */
-static void edid_fixup_preferred(struct drm_connector *connector,
- u32 quirks)
-{
- struct drm_display_mode *t, *cur_mode, *preferred_mode;
- int target_refresh;
-
- if (list_empty(&connector->probed_modes))
- return;
-
- if (quirks & EDID_QUIRK_PREFER_LARGE_60)
- target_refresh = 60;
- if (quirks & EDID_QUIRK_PREFER_LARGE_75)
- target_refresh = 75;
-
- preferred_mode = list_first_entry(&connector->probed_modes,
- struct drm_display_mode, head);
-
- list_for_each_entry_safe(cur_mode, t, &connector->probed_modes, head) {
- cur_mode->type &= ~DRM_MODE_TYPE_PREFERRED;
-
- if (cur_mode == preferred_mode)
- continue;
-
- /* Largest mode is preferred */
- if (MODE_SIZE(cur_mode) > MODE_SIZE(preferred_mode))
- preferred_mode = cur_mode;
-
- /* At a given size, try to get closest to target refresh */
- if ((MODE_SIZE(cur_mode) == MODE_SIZE(preferred_mode)) &&
- MODE_REFRESH_DIFF(cur_mode, target_refresh) <
- MODE_REFRESH_DIFF(preferred_mode, target_refresh)) {
- preferred_mode = cur_mode;
- }
- }
-
- preferred_mode->type |= DRM_MODE_TYPE_PREFERRED;
-}
-
-/**
- * drm_mode_std - convert standard mode info (width, height, refresh) into mode
- * @t: standard timing params
- *
- * Take the standard timing params (in this case width, aspect, and refresh)
- * and convert them into a real mode using CVT.
- *
- * Punts for now, but should eventually use the FB layer's CVT based mode
- * generation code.
- */
-struct drm_display_mode *drm_mode_std(struct drm_device *dev,
- struct std_timing *t)
-{
-// struct fb_videomode mode;
-
-// fb_find_mode_cvt(&mode, 0, 0);
- /* JJJ: convert to drm_display_mode */
- struct drm_display_mode *mode;
- int hsize = t->hsize * 8 + 248, vsize;
-
- mode = drm_mode_create(dev);
- if (!mode)
- return NULL;
-
- if (t->aspect_ratio == 0)
- vsize = (hsize * 10) / 16;
- else if (t->aspect_ratio == 1)
- vsize = (hsize * 3) / 4;
- else if (t->aspect_ratio == 2)
- vsize = (hsize * 4) / 5;
- else
- vsize = (hsize * 9) / 16;
-
- drm_mode_set_name(mode);
-
- return mode;
-}
-
-/**
- * drm_mode_detailed - create a new mode from an EDID detailed timing section
- * @dev: DRM device (needed to create new mode)
- * @edid: EDID block
- * @timing: EDID detailed timing info
- * @quirks: quirks to apply
- *
- * An EDID detailed timing block contains enough info for us to create and
- * return a new struct drm_display_mode.
- */
-static struct drm_display_mode *drm_mode_detailed(struct drm_device *dev,
- struct edid *edid,
- struct detailed_timing *timing,
- u32 quirks)
-{
- struct drm_display_mode *mode;
- struct detailed_pixel_timing *pt = &timing->data.pixel_data;
-
- if (pt->stereo) {
- printk(KERN_WARNING "stereo mode not supported\n");
- return NULL;
- }
- if (!pt->separate_sync) {
- printk(KERN_WARNING "integrated sync not supported\n");
- return NULL;
- }
-
- mode = drm_mode_create(dev);
- if (!mode)
- return NULL;
-
- mode->type = DRM_MODE_TYPE_DRIVER;
-
- if (quirks & EDID_QUIRK_135_CLOCK_TOO_HIGH)
- timing->pixel_clock = 1088;
-
- mode->clock = timing->pixel_clock * 10;
-
- mode->hdisplay = (pt->hactive_hi << 8) | pt->hactive_lo;
- mode->hsync_start = mode->hdisplay + ((pt->hsync_offset_hi << 8) |
- pt->hsync_offset_lo);
- mode->hsync_end = mode->hsync_start +
- ((pt->hsync_pulse_width_hi << 8) |
- pt->hsync_pulse_width_lo);
- mode->htotal = mode->hdisplay + ((pt->hblank_hi << 8) | pt->hblank_lo);
-
- mode->vdisplay = (pt->vactive_hi << 8) | pt->vactive_lo;
- mode->vsync_start = mode->vdisplay + ((pt->vsync_offset_hi << 8) |
- pt->vsync_offset_lo);
- mode->vsync_end = mode->vsync_start +
- ((pt->vsync_pulse_width_hi << 8) |
- pt->vsync_pulse_width_lo);
- mode->vtotal = mode->vdisplay + ((pt->vblank_hi << 8) | pt->vblank_lo);
-
- drm_mode_set_name(mode);
-
- if (pt->interlaced)
- mode->flags |= DRM_MODE_FLAG_INTERLACE;
-
- if (quirks & EDID_QUIRK_DETAILED_SYNC_PP) {
- pt->hsync_positive = 1;
- pt->vsync_positive = 1;
- }
-
- mode->flags |= pt->hsync_positive ? DRM_MODE_FLAG_PHSYNC : DRM_MODE_FLAG_NHSYNC;
- mode->flags |= pt->vsync_positive ? DRM_MODE_FLAG_PVSYNC : DRM_MODE_FLAG_NVSYNC;
-
- mode->width_mm = pt->width_mm_lo | (pt->width_mm_hi << 8);
- mode->height_mm = pt->height_mm_lo | (pt->height_mm_hi << 8);
-
- if (quirks & EDID_QUIRK_DETAILED_IN_CM) {
- mode->width_mm *= 10;
- mode->height_mm *= 10;
- }
-
- if (quirks & EDID_QUIRK_DETAILED_USE_MAXIMUM_SIZE) {
- mode->width_mm = edid->width_cm * 10;
- mode->height_mm = edid->height_cm * 10;
- }
-
- return mode;
-}
-
-/*
- * Detailed mode info for the EDID "established modes" data to use.
- */
-static struct drm_display_mode edid_est_modes[] = {
- { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 40000, 800, 840,
- 968, 1056, 0, 600, 601, 605, 628, 0,
- DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 800x600@60Hz */
- { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 36000, 800, 824,
- 896, 1024, 0, 600, 601, 603, 625, 0,
- DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 800x600@56Hz */
- { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 31500, 640, 656,
- 720, 840, 0, 480, 481, 484, 500, 0,
- DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@75Hz */
- { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 31500, 640, 664,
- 704, 832, 0, 480, 489, 491, 520, 0,
- DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@72Hz */
- { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 30240, 640, 704,
- 768, 864, 0, 480, 483, 486, 525, 0,
- DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@67Hz */
- { DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 25200, 640, 656,
- 752, 800, 0, 480, 490, 492, 525, 0,
- DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 640x480@60Hz */
- { DRM_MODE("720x400", DRM_MODE_TYPE_DRIVER, 35500, 720, 738,
- 846, 900, 0, 400, 421, 423, 449, 0,
- DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 720x400@88Hz */
- { DRM_MODE("720x400", DRM_MODE_TYPE_DRIVER, 28320, 720, 738,
- 846, 900, 0, 400, 412, 414, 449, 0,
- DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 720x400@70Hz */
- { DRM_MODE("1280x1024", DRM_MODE_TYPE_DRIVER, 135000, 1280, 1296,
- 1440, 1688, 0, 1024, 1025, 1028, 1066, 0,
- DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 1280x1024@75Hz */
- { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 78800, 1024, 1040,
- 1136, 1312, 0, 768, 769, 772, 800, 0,
- DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 1024x768@75Hz */
- { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 75000, 1024, 1048,
- 1184, 1328, 0, 768, 771, 777, 806, 0,
- DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 1024x768@70Hz */
- { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER, 65000, 1024, 1048,
- 1184, 1344, 0, 768, 771, 777, 806, 0,
- DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 1024x768@60Hz */
- { DRM_MODE("1024x768", DRM_MODE_TYPE_DRIVER,44900, 1024, 1032,
- 1208, 1264, 0, 768, 768, 776, 817, 0,
- DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC | DRM_MODE_FLAG_INTERLACE) }, /* 1024x768@43Hz */
- { DRM_MODE("832x624", DRM_MODE_TYPE_DRIVER, 57284, 832, 864,
- 928, 1152, 0, 624, 625, 628, 667, 0,
- DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC) }, /* 832x624@75Hz */
- { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 49500, 800, 816,
- 896, 1056, 0, 600, 601, 604, 625, 0,
- DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 800x600@75Hz */
- { DRM_MODE("800x600", DRM_MODE_TYPE_DRIVER, 50000, 800, 856,
- 976, 1040, 0, 600, 637, 643, 666, 0,
- DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 800x600@72Hz */
- { DRM_MODE("1152x864", DRM_MODE_TYPE_DRIVER, 108000, 1152, 1216,
- 1344, 1600, 0, 864, 865, 868, 900, 0,
- DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) }, /* 1152x864@75Hz */
-};
-
-#define EDID_EST_TIMINGS 16
-#define EDID_STD_TIMINGS 8
-#define EDID_DETAILED_TIMINGS 4
-
-/**
- * add_established_modes - get est. modes from EDID and add them
- * @edid: EDID block to scan
- *
- * Each EDID block contains a bitmap of the supported "established modes" list
- * (defined above). Tease them out and add them to the global modes list.
- */
-static int add_established_modes(struct drm_connector *connector, struct edid *edid)
-{
- struct drm_device *dev = connector->dev;
- unsigned long est_bits = edid->established_timings.t1 |
- (edid->established_timings.t2 << 8) |
- ((edid->established_timings.mfg_rsvd & 0x80) << 9);
- int i, modes = 0;
-
- for (i = 0; i <= EDID_EST_TIMINGS; i++)
- if (est_bits & (1<<i)) {
- struct drm_display_mode *newmode;
- newmode = drm_mode_duplicate(dev, &edid_est_modes[i]);
- if (newmode) {
- drm_mode_probed_add(connector, newmode);
- modes++;
- }
- }
-
- return modes;
-}
-
-/**
- * add_standard_modes - get std. modes from EDID and add them
- * @edid: EDID block to scan
- *
- * Standard modes can be calculated using the CVT standard. Grab them from
- * @edid, calculate them, and add them to the list.
- */
-static int add_standard_modes(struct drm_connector *connector, struct edid *edid)
-{
- struct drm_device *dev = connector->dev;
- int i, modes = 0;
-
- for (i = 0; i < EDID_STD_TIMINGS; i++) {
- struct std_timing *t = &edid->standard_timings[i];
- struct drm_display_mode *newmode;
-
- /* If std timings bytes are 1, 1 it's empty */
- if (t->hsize == 1 && (t->aspect_ratio | t->vfreq) == 1)
- continue;
-
- newmode = drm_mode_std(dev, &edid->standard_timings[i]);
- if (newmode) {
- drm_mode_probed_add(connector, newmode);
- modes++;
- }
- }
-
- return modes;
-}
-
-/**
- * add_detailed_modes - get detailed mode info from EDID data
- * @connector: attached connector
- * @edid: EDID block to scan
- * @quirks: quirks to apply
- *
- * Some of the detailed timing sections may contain mode information. Grab
- * it and add it to the list.
- */
-static int add_detailed_info(struct drm_connector *connector,
- struct edid *edid, u32 quirks)
-{
- struct drm_device *dev = connector->dev;
- int i, j, modes = 0;
-
- for (i = 0; i < EDID_DETAILED_TIMINGS; i++) {
- struct detailed_timing *timing = &edid->detailed_timings[i];
- struct detailed_non_pixel *data = &timing->data.other_data;
- struct drm_display_mode *newmode;
-
- /* EDID up to and including 1.2 may put monitor info here */
- if (edid->version == 1 && edid->revision < 3)
- continue;
-
- /* Detailed mode timing */
- if (timing->pixel_clock) {
- newmode = drm_mode_detailed(dev, edid, timing, quirks);
- if (!newmode)
- continue;
-
- /* First detailed mode is preferred */
- if (i == 0 && edid->preferred_timing)
- newmode->type |= DRM_MODE_TYPE_PREFERRED;
- drm_mode_probed_add(connector, newmode);
-
- modes++;
- continue;
- }
-
- /* Other timing or info */
- switch (data->type) {
- case EDID_DETAIL_MONITOR_SERIAL:
- break;
- case EDID_DETAIL_MONITOR_STRING:
- break;
- case EDID_DETAIL_MONITOR_RANGE:
- /* Get monitor range data */
- break;
- case EDID_DETAIL_MONITOR_NAME:
- break;
- case EDID_DETAIL_MONITOR_CPDATA:
- break;
- case EDID_DETAIL_STD_MODES:
- /* Five modes per detailed section */
- for (j = 0; j < 5; i++) {
- struct std_timing *std;
- struct drm_display_mode *newmode;
-
- std = &data->data.timings[j];
- newmode = drm_mode_std(dev, std);
- if (newmode) {
- drm_mode_probed_add(connector, newmode);
- modes++;
- }
- }
- break;
- default:
- break;
- }
- }
-
- return modes;
-}
-
-#define DDC_ADDR 0x50
-
-unsigned char *drm_do_probe_ddc_edid(struct i2c_adapter *adapter)
-{
- unsigned char start = 0x0;
- unsigned char *buf = kmalloc(EDID_LENGTH, GFP_KERNEL);
- struct i2c_msg msgs[] = {
- {
- .addr = DDC_ADDR,
- .flags = 0,
- .len = 1,
- .buf = &start,
- }, {
- .addr = DDC_ADDR,
- .flags = I2C_M_RD,
- .len = EDID_LENGTH,
- .buf = buf,
- }
- };
-
- if (!buf) {
- dev_warn(&adapter->dev, "unable to allocate memory for EDID "
- "block.\n");
- return NULL;
- }
-
- if (i2c_transfer(adapter, msgs, 2) == 2)
- return buf;
-
- dev_info(&adapter->dev, "unable to read EDID block.\n");
- kfree(buf);
- return NULL;
-}
-EXPORT_SYMBOL(drm_do_probe_ddc_edid);
-
-static unsigned char *drm_ddc_read(struct i2c_adapter *adapter)
-{
- struct i2c_algo_bit_data *algo_data = adapter->algo_data;
- unsigned char *edid = NULL;
- int i, j;
-
- algo_data->setscl(algo_data->data, 1);
-
- for (i = 0; i < 3; i++) {
- /* For some old monitors we need the
- * following process to initialize/stop DDC
- */
- algo_data->setsda(algo_data->data, 1);
- msleep(13);
-
- algo_data->setscl(algo_data->data, 1);
- for (j = 0; j < 5; j++) {
- msleep(10);
- if (algo_data->getscl(algo_data->data))
- break;
- }
- if (j == 5)
- continue;
-
- algo_data->setsda(algo_data->data, 0);
- msleep(15);
- algo_data->setscl(algo_data->data, 0);
- msleep(15);
- algo_data->setsda(algo_data->data, 1);
- msleep(15);
-
- /* Do the real work */
- edid = drm_do_probe_ddc_edid(adapter);
- algo_data->setsda(algo_data->data, 0);
- algo_data->setscl(algo_data->data, 0);
- msleep(15);
-
- algo_data->setscl(algo_data->data, 1);
- for (j = 0; j < 10; j++) {
- msleep(10);
- if (algo_data->getscl(algo_data->data))
- break;
- }
-
- algo_data->setsda(algo_data->data, 1);
- msleep(15);
- algo_data->setscl(algo_data->data, 0);
- algo_data->setsda(algo_data->data, 0);
- if (edid)
- break;
- }
- /* Release the DDC lines when done or the Apple Cinema HD display
- * will switch off
- */
- algo_data->setsda(algo_data->data, 1);
- algo_data->setscl(algo_data->data, 1);
-
- return edid;
-}
-
-/**
- * drm_get_edid - get EDID data, if available
- * @connector: connector we're probing
- * @adapter: i2c adapter to use for DDC
- *
- * Poke the given connector's i2c channel to grab EDID data if possible.
- *
- * Return edid data or NULL if we couldn't find any.
- */
-struct edid *drm_get_edid(struct drm_connector *connector,
- struct i2c_adapter *adapter)
-{
- struct edid *edid;
-
- edid = (struct edid *)drm_ddc_read(adapter);
- if (!edid) {
- dev_warn(&connector->dev->pdev->dev, "%s: no EDID data\n",
- drm_get_connector_name(connector));
- return NULL;
- }
- if (!edid_is_valid(edid)) {
- dev_warn(&connector->dev->pdev->dev, "%s: EDID invalid.\n",
- drm_get_connector_name(connector));
- kfree(edid);
- return NULL;
- }
-
- connector->display_info.raw_edid = (char *)edid;
-
- return edid;
-}
-EXPORT_SYMBOL(drm_get_edid);
-
-/**
- * drm_add_edid_modes - add modes from EDID data, if available
- * @connector: connector we're probing
- * @edid: edid data
- *
- * Add the specified modes to the connector's mode list.
- *
- * Return number of modes added or 0 if we couldn't find any.
- */
-int drm_add_edid_modes(struct drm_connector *connector, struct edid *edid)
-{
- int num_modes = 0;
- u32 quirks;
-
- if (edid == NULL) {
- return 0;
- }
- if (!edid_is_valid(edid)) {
- dev_warn(&connector->dev->pdev->dev, "%s: EDID invalid.\n",
- drm_get_connector_name(connector));
- return 0;
- }
-
- quirks = edid_get_quirks(edid);
-
- num_modes += add_established_modes(connector, edid);
- num_modes += add_standard_modes(connector, edid);
- num_modes += add_detailed_info(connector, edid, quirks);
-
- if (quirks & (EDID_QUIRK_PREFER_LARGE_60 | EDID_QUIRK_PREFER_LARGE_75))
- edid_fixup_preferred(connector, quirks);
-
- connector->display_info.serration_vsync = edid->serration_vsync;
- connector->display_info.sync_on_green = edid->sync_on_green;
- connector->display_info.composite_sync = edid->composite_sync;
- connector->display_info.separate_syncs = edid->separate_syncs;
- connector->display_info.blank_to_black = edid->blank_to_black;
- connector->display_info.video_level = edid->video_level;
- connector->display_info.digital = edid->digital;
- connector->display_info.width_mm = edid->width_cm * 10;
- connector->display_info.height_mm = edid->height_cm * 10;
- connector->display_info.gamma = edid->gamma;
- connector->display_info.gtf_supported = edid->default_gtf;
- connector->display_info.standard_color = edid->standard_color;
- connector->display_info.display_type = edid->display_type;
- connector->display_info.active_off_supported = edid->pm_active_off;
- connector->display_info.suspend_supported = edid->pm_suspend;
- connector->display_info.standby_supported = edid->pm_standby;
- connector->display_info.gamma = edid->gamma;
-
- return num_modes;
-}
-EXPORT_SYMBOL(drm_add_edid_modes);