diff options
Diffstat (limited to 'linux-core/drm_edid.c')
| -rw-r--r-- | linux-core/drm_edid.c | 737 |
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); |