diff options
Diffstat (limited to 'ANDROID_3.4.5/drivers/gpu/drm/drm_edid.c')
| -rw-r--r-- | ANDROID_3.4.5/drivers/gpu/drm/drm_edid.c | 1816 |
1 files changed, 0 insertions, 1816 deletions
diff --git a/ANDROID_3.4.5/drivers/gpu/drm/drm_edid.c b/ANDROID_3.4.5/drivers/gpu/drm/drm_edid.c deleted file mode 100644 index 6e38325d..00000000 --- a/ANDROID_3.4.5/drivers/gpu/drm/drm_edid.c +++ /dev/null @@ -1,1816 +0,0 @@ -/* - * Copyright (c) 2006 Luc Verhaegen (quirks list) - * Copyright (c) 2007-2008 Intel Corporation - * Jesse Barnes <jesse.barnes@intel.com> - * Copyright 2010 Red Hat, Inc. - * - * 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/slab.h> -#include <linux/i2c.h> -#include <linux/export.h> -#include "drmP.h" -#include "drm_edid.h" -#include "drm_edid_modes.h" - -#define version_greater(edid, maj, min) \ - (((edid)->version > (maj)) || \ - ((edid)->version == (maj) && (edid)->revision > (min))) - -#define EDID_EST_TIMINGS 16 -#define EDID_STD_TIMINGS 8 -#define EDID_DETAILED_TIMINGS 4 - -/* - * 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) - -struct detailed_mode_closure { - struct drm_connector *connector; - struct edid *edid; - bool preferred; - u32 quirks; - int modes; -}; - -#define LEVEL_DMT 0 -#define LEVEL_GTF 1 -#define LEVEL_GTF2 2 -#define LEVEL_CVT 3 - -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 }, - /* Envision EN2028 */ - { "EPI", 8232, EDID_QUIRK_PREFER_LARGE_60 }, - - /* 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 }, -}; - -/*** DDC fetch and block validation ***/ - -static const u8 edid_header[] = { - 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00 -}; - - /* - * Sanity check the header of the base EDID block. Return 8 if the header - * is perfect, down to 0 if it's totally wrong. - */ -int drm_edid_header_is_valid(const u8 *raw_edid) -{ - int i, score = 0; - - for (i = 0; i < sizeof(edid_header); i++) - if (raw_edid[i] == edid_header[i]) - score++; - - return score; -} -EXPORT_SYMBOL(drm_edid_header_is_valid); - - -/* - * Sanity check the EDID block (base or extension). Return 0 if the block - * doesn't check out, or 1 if it's valid. - */ -bool drm_edid_block_valid(u8 *raw_edid) -{ - int i; - u8 csum = 0; - struct edid *edid = (struct edid *)raw_edid; - - if (raw_edid[0] == 0x00) { - int score = drm_edid_header_is_valid(raw_edid); - if (score == 8) ; - else if (score >= 6) { - DRM_DEBUG("Fixing EDID header, your hardware may be failing\n"); - memcpy(raw_edid, edid_header, sizeof(edid_header)); - } else { - 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); - - /* allow CEA to slide through, switches mangle this */ - if (raw_edid[0] != 0x02) - goto bad; - } - - /* per-block-type checks */ - switch (raw_edid[0]) { - case 0: /* base */ - if (edid->version != 1) { - DRM_ERROR("EDID has major version %d, instead of 1\n", edid->version); - goto bad; - } - - if (edid->revision > 4) - DRM_DEBUG("EDID minor > 4, assuming backward compatibility\n"); - break; - - default: - break; - } - - return 1; - -bad: - if (raw_edid) { - printk(KERN_ERR "Raw EDID:\n"); - print_hex_dump(KERN_ERR, " \t", DUMP_PREFIX_NONE, 16, 1, - raw_edid, EDID_LENGTH, false); - } - return 0; -} -EXPORT_SYMBOL(drm_edid_block_valid); - -/** - * drm_edid_is_valid - sanity check EDID data - * @edid: EDID data - * - * Sanity-check an entire EDID record (including extensions) - */ -bool drm_edid_is_valid(struct edid *edid) -{ - int i; - u8 *raw = (u8 *)edid; - - if (!edid) - return false; - - for (i = 0; i <= edid->extensions; i++) - if (!drm_edid_block_valid(raw + i * EDID_LENGTH)) - return false; - - return true; -} -EXPORT_SYMBOL(drm_edid_is_valid); - -#define DDC_SEGMENT_ADDR 0x30 -/** - * Get EDID information via I2C. - * - * \param adapter : i2c device adaptor - * \param buf : EDID data buffer to be filled - * \param len : EDID data buffer length - * \return 0 on success or -1 on failure. - * - * Try to fetch EDID information by calling i2c driver function. - */ -static int -drm_do_probe_ddc_edid(struct i2c_adapter *adapter, unsigned char *buf, - int block, int len) -{ - unsigned char start = block * EDID_LENGTH; - int ret, retries = 5; - - /* The core i2c driver will automatically retry the transfer if the - * adapter reports EAGAIN. However, we find that bit-banging transfers - * are susceptible to errors under a heavily loaded machine and - * generate spurious NAKs and timeouts. Retrying the transfer - * of the individual block a few times seems to overcome this. - */ - do { - struct i2c_msg msgs[] = { - { - .addr = DDC_ADDR, - .flags = 0, - .len = 1, - .buf = &start, - }, { - .addr = DDC_ADDR, - .flags = I2C_M_RD, - .len = len, - .buf = buf, - } - }; - ret = i2c_transfer(adapter, msgs, 2); - if (ret == -ENXIO) { - DRM_DEBUG_KMS("drm: skipping non-existent adapter %s\n", - adapter->name); - break; - } - } while (ret != 2 && --retries); - - return ret == 2 ? 0 : -1; -} - -static bool drm_edid_is_zero(u8 *in_edid, int length) -{ - int i; - u32 *raw_edid = (u32 *)in_edid; - - for (i = 0; i < length / 4; i++) - if (*(raw_edid + i) != 0) - return false; - return true; -} - -static u8 * -drm_do_get_edid(struct drm_connector *connector, struct i2c_adapter *adapter) -{ - int i, j = 0, valid_extensions = 0; - u8 *block, *new; - - if ((block = kmalloc(EDID_LENGTH, GFP_KERNEL)) == NULL) - return NULL; - - /* base block fetch */ - for (i = 0; i < 4; i++) { - if (drm_do_probe_ddc_edid(adapter, block, 0, EDID_LENGTH)) - goto out; - if (drm_edid_block_valid(block)) - break; - if (i == 0 && drm_edid_is_zero(block, EDID_LENGTH)) { - connector->null_edid_counter++; - goto carp; - } - } - if (i == 4) - goto carp; - - /* if there's no extensions, we're done */ - if (block[0x7e] == 0) - return block; - - new = krealloc(block, (block[0x7e] + 1) * EDID_LENGTH, GFP_KERNEL); - if (!new) - goto out; - block = new; - - for (j = 1; j <= block[0x7e]; j++) { - for (i = 0; i < 4; i++) { - if (drm_do_probe_ddc_edid(adapter, - block + (valid_extensions + 1) * EDID_LENGTH, - j, EDID_LENGTH)) - goto out; - if (drm_edid_block_valid(block + (valid_extensions + 1) * EDID_LENGTH)) { - valid_extensions++; - break; - } - } - if (i == 4) - dev_warn(connector->dev->dev, - "%s: Ignoring invalid EDID block %d.\n", - drm_get_connector_name(connector), j); - } - - if (valid_extensions != block[0x7e]) { - block[EDID_LENGTH-1] += block[0x7e] - valid_extensions; - block[0x7e] = valid_extensions; - new = krealloc(block, (valid_extensions + 1) * EDID_LENGTH, GFP_KERNEL); - if (!new) - goto out; - block = new; - } - - return block; - -carp: - dev_warn(connector->dev->dev, "%s: EDID block %d invalid.\n", - drm_get_connector_name(connector), j); - -out: - kfree(block); - return NULL; -} - -/** - * Probe DDC presence. - * - * \param adapter : i2c device adaptor - * \return 1 on success - */ -static bool -drm_probe_ddc(struct i2c_adapter *adapter) -{ - unsigned char out; - - return (drm_do_probe_ddc_edid(adapter, &out, 0, 1) == 0); -} - -/** - * drm_get_edid - get EDID data, if available - * @connector: connector we're probing - * @adapter: i2c adapter to use for DDC - * - * Poke the given i2c channel to grab EDID data if possible. If found, - * attach it to the connector. - * - * 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 = NULL; - - if (drm_probe_ddc(adapter)) - edid = (struct edid *)drm_do_get_edid(connector, adapter); - - connector->display_info.raw_edid = (char *)edid; - - return edid; - -} -EXPORT_SYMBOL(drm_get_edid); - -/*** EDID parsing ***/ - -/** - * 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[1] & 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 = 0; - - 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; -} - -struct drm_display_mode *drm_mode_find_dmt(struct drm_device *dev, - int hsize, int vsize, int fresh) -{ - struct drm_display_mode *mode = NULL; - int i; - - for (i = 0; i < drm_num_dmt_modes; i++) { - const struct drm_display_mode *ptr = &drm_dmt_modes[i]; - if (hsize == ptr->hdisplay && - vsize == ptr->vdisplay && - fresh == drm_mode_vrefresh(ptr)) { - /* get the expected default mode */ - mode = drm_mode_duplicate(dev, ptr); - break; - } - } - return mode; -} -EXPORT_SYMBOL(drm_mode_find_dmt); - -typedef void detailed_cb(struct detailed_timing *timing, void *closure); - -static void -cea_for_each_detailed_block(u8 *ext, detailed_cb *cb, void *closure) -{ - int i, n = 0; - u8 d = ext[0x02]; - u8 *det_base = ext + d; - - n = (127 - d) / 18; - for (i = 0; i < n; i++) - cb((struct detailed_timing *)(det_base + 18 * i), closure); -} - -static void -vtb_for_each_detailed_block(u8 *ext, detailed_cb *cb, void *closure) -{ - unsigned int i, n = min((int)ext[0x02], 6); - u8 *det_base = ext + 5; - - if (ext[0x01] != 1) - return; /* unknown version */ - - for (i = 0; i < n; i++) - cb((struct detailed_timing *)(det_base + 18 * i), closure); -} - -static void -drm_for_each_detailed_block(u8 *raw_edid, detailed_cb *cb, void *closure) -{ - int i; - struct edid *edid = (struct edid *)raw_edid; - - if (edid == NULL) - return; - - for (i = 0; i < EDID_DETAILED_TIMINGS; i++) - cb(&(edid->detailed_timings[i]), closure); - - for (i = 1; i <= raw_edid[0x7e]; i++) { - u8 *ext = raw_edid + (i * EDID_LENGTH); - switch (*ext) { - case CEA_EXT: - cea_for_each_detailed_block(ext, cb, closure); - break; - case VTB_EXT: - vtb_for_each_detailed_block(ext, cb, closure); - break; - default: - break; - } - } -} - -static void -is_rb(struct detailed_timing *t, void *data) -{ - u8 *r = (u8 *)t; - if (r[3] == EDID_DETAIL_MONITOR_RANGE) - if (r[15] & 0x10) - *(bool *)data = true; -} - -/* EDID 1.4 defines this explicitly. For EDID 1.3, we guess, badly. */ -static bool -drm_monitor_supports_rb(struct edid *edid) -{ - if (edid->revision >= 4) { - bool ret = false; - drm_for_each_detailed_block((u8 *)edid, is_rb, &ret); - return ret; - } - - return ((edid->input & DRM_EDID_INPUT_DIGITAL) != 0); -} - -static void -find_gtf2(struct detailed_timing *t, void *data) -{ - u8 *r = (u8 *)t; - if (r[3] == EDID_DETAIL_MONITOR_RANGE && r[10] == 0x02) - *(u8 **)data = r; -} - -/* Secondary GTF curve kicks in above some break frequency */ -static int -drm_gtf2_hbreak(struct edid *edid) -{ - u8 *r = NULL; - drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r); - return r ? (r[12] * 2) : 0; -} - -static int -drm_gtf2_2c(struct edid *edid) -{ - u8 *r = NULL; - drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r); - return r ? r[13] : 0; -} - -static int -drm_gtf2_m(struct edid *edid) -{ - u8 *r = NULL; - drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r); - return r ? (r[15] << 8) + r[14] : 0; -} - -static int -drm_gtf2_k(struct edid *edid) -{ - u8 *r = NULL; - drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r); - return r ? r[16] : 0; -} - -static int -drm_gtf2_2j(struct edid *edid) -{ - u8 *r = NULL; - drm_for_each_detailed_block((u8 *)edid, find_gtf2, &r); - return r ? r[17] : 0; -} - -/** - * standard_timing_level - get std. timing level(CVT/GTF/DMT) - * @edid: EDID block to scan - */ -static int standard_timing_level(struct edid *edid) -{ - if (edid->revision >= 2) { - if (edid->revision >= 4 && (edid->features & DRM_EDID_FEATURE_DEFAULT_GTF)) - return LEVEL_CVT; - if (drm_gtf2_hbreak(edid)) - return LEVEL_GTF2; - return LEVEL_GTF; - } - return LEVEL_DMT; -} - -/* - * 0 is reserved. The spec says 0x01 fill for unused timings. Some old - * monitors fill with ascii space (0x20) instead. - */ -static int -bad_std_timing(u8 a, u8 b) -{ - return (a == 0x00 && b == 0x00) || - (a == 0x01 && b == 0x01) || - (a == 0x20 && b == 0x20); -} - -/** - * drm_mode_std - convert standard mode info (width, height, refresh) into mode - * @t: standard timing params - * @timing_level: standard timing level - * - * Take the standard timing params (in this case width, aspect, and refresh) - * and convert them into a real mode using CVT/GTF/DMT. - */ -static struct drm_display_mode * -drm_mode_std(struct drm_connector *connector, struct edid *edid, - struct std_timing *t, int revision) -{ - struct drm_device *dev = connector->dev; - struct drm_display_mode *m, *mode = NULL; - int hsize, vsize; - int vrefresh_rate; - unsigned aspect_ratio = (t->vfreq_aspect & EDID_TIMING_ASPECT_MASK) - >> EDID_TIMING_ASPECT_SHIFT; - unsigned vfreq = (t->vfreq_aspect & EDID_TIMING_VFREQ_MASK) - >> EDID_TIMING_VFREQ_SHIFT; - int timing_level = standard_timing_level(edid); - - if (bad_std_timing(t->hsize, t->vfreq_aspect)) - return NULL; - - /* According to the EDID spec, the hdisplay = hsize * 8 + 248 */ - hsize = t->hsize * 8 + 248; - /* vrefresh_rate = vfreq + 60 */ - vrefresh_rate = vfreq + 60; - /* the vdisplay is calculated based on the aspect ratio */ - if (aspect_ratio == 0) { - if (revision < 3) - vsize = hsize; - else - vsize = (hsize * 10) / 16; - } else if (aspect_ratio == 1) - vsize = (hsize * 3) / 4; - else if (aspect_ratio == 2) - vsize = (hsize * 4) / 5; - else - vsize = (hsize * 9) / 16; - - /* HDTV hack, part 1 */ - if (vrefresh_rate == 60 && - ((hsize == 1360 && vsize == 765) || - (hsize == 1368 && vsize == 769))) { - hsize = 1366; - vsize = 768; - } - - /* - * If this connector already has a mode for this size and refresh - * rate (because it came from detailed or CVT info), use that - * instead. This way we don't have to guess at interlace or - * reduced blanking. - */ - list_for_each_entry(m, &connector->probed_modes, head) - if (m->hdisplay == hsize && m->vdisplay == vsize && - drm_mode_vrefresh(m) == vrefresh_rate) - return NULL; - - /* HDTV hack, part 2 */ - if (hsize == 1366 && vsize == 768 && vrefresh_rate == 60) { - mode = drm_cvt_mode(dev, 1366, 768, vrefresh_rate, 0, 0, - false); - mode->hdisplay = 1366; - mode->hsync_start = mode->hsync_start - 1; - mode->hsync_end = mode->hsync_end - 1; - return mode; - } - - /* check whether it can be found in default mode table */ - mode = drm_mode_find_dmt(dev, hsize, vsize, vrefresh_rate); - if (mode) - return mode; - - switch (timing_level) { - case LEVEL_DMT: - break; - case LEVEL_GTF: - mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0); - break; - case LEVEL_GTF2: - /* - * This is potentially wrong if there's ever a monitor with - * more than one ranges section, each claiming a different - * secondary GTF curve. Please don't do that. - */ - mode = drm_gtf_mode(dev, hsize, vsize, vrefresh_rate, 0, 0); - if (drm_mode_hsync(mode) > drm_gtf2_hbreak(edid)) { - drm_mode_destroy(dev, mode); - mode = drm_gtf_mode_complex(dev, hsize, vsize, - vrefresh_rate, 0, 0, - drm_gtf2_m(edid), - drm_gtf2_2c(edid), - drm_gtf2_k(edid), - drm_gtf2_2j(edid)); - } - break; - case LEVEL_CVT: - mode = drm_cvt_mode(dev, hsize, vsize, vrefresh_rate, 0, 0, - false); - break; - } - return mode; -} - -/* - * EDID is delightfully ambiguous about how interlaced modes are to be - * encoded. Our internal representation is of frame height, but some - * HDTV detailed timings are encoded as field height. - * - * The format list here is from CEA, in frame size. Technically we - * should be checking refresh rate too. Whatever. - */ -static void -drm_mode_do_interlace_quirk(struct drm_display_mode *mode, - struct detailed_pixel_timing *pt) -{ - int i; - static const struct { - int w, h; - } cea_interlaced[] = { - { 1920, 1080 }, - { 720, 480 }, - { 1440, 480 }, - { 2880, 480 }, - { 720, 576 }, - { 1440, 576 }, - { 2880, 576 }, - }; - - if (!(pt->misc & DRM_EDID_PT_INTERLACED)) - return; - - for (i = 0; i < ARRAY_SIZE(cea_interlaced); i++) { - if ((mode->hdisplay == cea_interlaced[i].w) && - (mode->vdisplay == cea_interlaced[i].h / 2)) { - mode->vdisplay *= 2; - mode->vsync_start *= 2; - mode->vsync_end *= 2; - mode->vtotal *= 2; - mode->vtotal |= 1; - } - } - - mode->flags |= DRM_MODE_FLAG_INTERLACE; -} - -/** - * 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; - unsigned hactive = (pt->hactive_hblank_hi & 0xf0) << 4 | pt->hactive_lo; - unsigned vactive = (pt->vactive_vblank_hi & 0xf0) << 4 | pt->vactive_lo; - unsigned hblank = (pt->hactive_hblank_hi & 0xf) << 8 | pt->hblank_lo; - unsigned vblank = (pt->vactive_vblank_hi & 0xf) << 8 | pt->vblank_lo; - unsigned hsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc0) << 2 | pt->hsync_offset_lo; - unsigned hsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x30) << 4 | pt->hsync_pulse_width_lo; - unsigned vsync_offset = (pt->hsync_vsync_offset_pulse_width_hi & 0xc) >> 2 | pt->vsync_offset_pulse_width_lo >> 4; - unsigned vsync_pulse_width = (pt->hsync_vsync_offset_pulse_width_hi & 0x3) << 4 | (pt->vsync_offset_pulse_width_lo & 0xf); - - /* ignore tiny modes */ - if (hactive < 64 || vactive < 64) - return NULL; - - if (pt->misc & DRM_EDID_PT_STEREO) { - printk(KERN_WARNING "stereo mode not supported\n"); - return NULL; - } - if (!(pt->misc & DRM_EDID_PT_SEPARATE_SYNC)) { - printk(KERN_WARNING "composite sync not supported\n"); - } - - /* it is incorrect if hsync/vsync width is zero */ - if (!hsync_pulse_width || !vsync_pulse_width) { - DRM_DEBUG_KMS("Incorrect Detailed timing. " - "Wrong Hsync/Vsync pulse width\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 = cpu_to_le16(1088); - - mode->clock = le16_to_cpu(timing->pixel_clock) * 10; - - mode->hdisplay = hactive; - mode->hsync_start = mode->hdisplay + hsync_offset; - mode->hsync_end = mode->hsync_start + hsync_pulse_width; - mode->htotal = mode->hdisplay + hblank; - - mode->vdisplay = vactive; - mode->vsync_start = mode->vdisplay + vsync_offset; - mode->vsync_end = mode->vsync_start + vsync_pulse_width; - mode->vtotal = mode->vdisplay + vblank; - - /* Some EDIDs have bogus h/vtotal values */ - if (mode->hsync_end > mode->htotal) - mode->htotal = mode->hsync_end + 1; - if (mode->vsync_end > mode->vtotal) - mode->vtotal = mode->vsync_end + 1; - - drm_mode_do_interlace_quirk(mode, pt); - - drm_mode_set_name(mode); - - if (quirks & EDID_QUIRK_DETAILED_SYNC_PP) { - pt->misc |= DRM_EDID_PT_HSYNC_POSITIVE | DRM_EDID_PT_VSYNC_POSITIVE; - } - - mode->flags |= (pt->misc & DRM_EDID_PT_HSYNC_POSITIVE) ? - DRM_MODE_FLAG_PHSYNC : DRM_MODE_FLAG_NHSYNC; - mode->flags |= (pt->misc & DRM_EDID_PT_VSYNC_POSITIVE) ? - DRM_MODE_FLAG_PVSYNC : DRM_MODE_FLAG_NVSYNC; - - mode->width_mm = pt->width_mm_lo | (pt->width_height_mm_hi & 0xf0) << 4; - mode->height_mm = pt->height_mm_lo | (pt->width_height_mm_hi & 0xf) << 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; -} - -static bool -mode_is_rb(const struct drm_display_mode *mode) -{ - return (mode->htotal - mode->hdisplay == 160) && - (mode->hsync_end - mode->hdisplay == 80) && - (mode->hsync_end - mode->hsync_start == 32) && - (mode->vsync_start - mode->vdisplay == 3); -} - -static bool -mode_in_hsync_range(const struct drm_display_mode *mode, - struct edid *edid, u8 *t) -{ - int hsync, hmin, hmax; - - hmin = t[7]; - if (edid->revision >= 4) - hmin += ((t[4] & 0x04) ? 255 : 0); - hmax = t[8]; - if (edid->revision >= 4) - hmax += ((t[4] & 0x08) ? 255 : 0); - hsync = drm_mode_hsync(mode); - - return (hsync <= hmax && hsync >= hmin); -} - -static bool -mode_in_vsync_range(const struct drm_display_mode *mode, - struct edid *edid, u8 *t) -{ - int vsync, vmin, vmax; - - vmin = t[5]; - if (edid->revision >= 4) - vmin += ((t[4] & 0x01) ? 255 : 0); - vmax = t[6]; - if (edid->revision >= 4) - vmax += ((t[4] & 0x02) ? 255 : 0); - vsync = drm_mode_vrefresh(mode); - - return (vsync <= vmax && vsync >= vmin); -} - -static u32 -range_pixel_clock(struct edid *edid, u8 *t) -{ - /* unspecified */ - if (t[9] == 0 || t[9] == 255) - return 0; - - /* 1.4 with CVT support gives us real precision, yay */ - if (edid->revision >= 4 && t[10] == 0x04) - return (t[9] * 10000) - ((t[12] >> 2) * 250); - - /* 1.3 is pathetic, so fuzz up a bit */ - return t[9] * 10000 + 5001; -} - -static bool -mode_in_range(const struct drm_display_mode *mode, struct edid *edid, - struct detailed_timing *timing) -{ - u32 max_clock; - u8 *t = (u8 *)timing; - - if (!mode_in_hsync_range(mode, edid, t)) - return false; - - if (!mode_in_vsync_range(mode, edid, t)) - return false; - - if ((max_clock = range_pixel_clock(edid, t))) - if (mode->clock > max_clock) - return false; - - /* 1.4 max horizontal check */ - if (edid->revision >= 4 && t[10] == 0x04) - if (t[13] && mode->hdisplay > 8 * (t[13] + (256 * (t[12]&0x3)))) - return false; - - if (mode_is_rb(mode) && !drm_monitor_supports_rb(edid)) - return false; - - return true; -} - -/* - * XXX If drm_dmt_modes ever regrows the CVT-R modes (and it will) this will - * need to account for them. - */ -static int -drm_gtf_modes_for_range(struct drm_connector *connector, struct edid *edid, - struct detailed_timing *timing) -{ - int i, modes = 0; - struct drm_display_mode *newmode; - struct drm_device *dev = connector->dev; - - for (i = 0; i < drm_num_dmt_modes; i++) { - if (mode_in_range(drm_dmt_modes + i, edid, timing)) { - newmode = drm_mode_duplicate(dev, &drm_dmt_modes[i]); - if (newmode) { - drm_mode_probed_add(connector, newmode); - modes++; - } - } - } - - return modes; -} - -static void -do_inferred_modes(struct detailed_timing *timing, void *c) -{ - struct detailed_mode_closure *closure = c; - struct detailed_non_pixel *data = &timing->data.other_data; - int gtf = (closure->edid->features & DRM_EDID_FEATURE_DEFAULT_GTF); - - if (gtf && data->type == EDID_DETAIL_MONITOR_RANGE) - closure->modes += drm_gtf_modes_for_range(closure->connector, - closure->edid, - timing); -} - -static int -add_inferred_modes(struct drm_connector *connector, struct edid *edid) -{ - struct detailed_mode_closure closure = { - connector, edid, 0, 0, 0 - }; - - if (version_greater(edid, 1, 0)) - drm_for_each_detailed_block((u8 *)edid, do_inferred_modes, - &closure); - - return closure.modes; -} - -static int -drm_est3_modes(struct drm_connector *connector, struct detailed_timing *timing) -{ - int i, j, m, modes = 0; - struct drm_display_mode *mode; - u8 *est = ((u8 *)timing) + 5; - - for (i = 0; i < 6; i++) { - for (j = 7; j > 0; j--) { - m = (i * 8) + (7 - j); - if (m >= ARRAY_SIZE(est3_modes)) - break; - if (est[i] & (1 << j)) { - mode = drm_mode_find_dmt(connector->dev, - est3_modes[m].w, - est3_modes[m].h, - est3_modes[m].r - /*, est3_modes[m].rb */); - if (mode) { - drm_mode_probed_add(connector, mode); - modes++; - } - } - } - } - - return modes; -} - -static void -do_established_modes(struct detailed_timing *timing, void *c) -{ - struct detailed_mode_closure *closure = c; - struct detailed_non_pixel *data = &timing->data.other_data; - - if (data->type == EDID_DETAIL_EST_TIMINGS) - closure->modes += drm_est3_modes(closure->connector, timing); -} - -/** - * 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; - struct detailed_mode_closure closure = { - connector, edid, 0, 0, 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++; - } - } - } - - if (version_greater(edid, 1, 0)) - drm_for_each_detailed_block((u8 *)edid, - do_established_modes, &closure); - - return modes + closure.modes; -} - -static void -do_standard_modes(struct detailed_timing *timing, void *c) -{ - struct detailed_mode_closure *closure = c; - struct detailed_non_pixel *data = &timing->data.other_data; - struct drm_connector *connector = closure->connector; - struct edid *edid = closure->edid; - - if (data->type == EDID_DETAIL_STD_MODES) { - int i; - for (i = 0; i < 6; i++) { - struct std_timing *std; - struct drm_display_mode *newmode; - - std = &data->data.timings[i]; - newmode = drm_mode_std(connector, edid, std, - edid->revision); - if (newmode) { - drm_mode_probed_add(connector, newmode); - closure->modes++; - } - } - } -} - -/** - * add_standard_modes - get std. modes from EDID and add them - * @edid: EDID block to scan - * - * Standard modes can be calculated using the appropriate standard (DMT, - * GTF or CVT. Grab them from @edid and add them to the list. - */ -static int -add_standard_modes(struct drm_connector *connector, struct edid *edid) -{ - int i, modes = 0; - struct detailed_mode_closure closure = { - connector, edid, 0, 0, 0 - }; - - for (i = 0; i < EDID_STD_TIMINGS; i++) { - struct drm_display_mode *newmode; - - newmode = drm_mode_std(connector, edid, - &edid->standard_timings[i], - edid->revision); - if (newmode) { - drm_mode_probed_add(connector, newmode); - modes++; - } - } - - if (version_greater(edid, 1, 0)) - drm_for_each_detailed_block((u8 *)edid, do_standard_modes, - &closure); - - /* XXX should also look for standard codes in VTB blocks */ - - return modes + closure.modes; -} - -static int drm_cvt_modes(struct drm_connector *connector, - struct detailed_timing *timing) -{ - int i, j, modes = 0; - struct drm_display_mode *newmode; - struct drm_device *dev = connector->dev; - struct cvt_timing *cvt; - const int rates[] = { 60, 85, 75, 60, 50 }; - const u8 empty[3] = { 0, 0, 0 }; - - for (i = 0; i < 4; i++) { - int uninitialized_var(width), height; - cvt = &(timing->data.other_data.data.cvt[i]); - - if (!memcmp(cvt->code, empty, 3)) - continue; - - height = (cvt->code[0] + ((cvt->code[1] & 0xf0) << 4) + 1) * 2; - switch (cvt->code[1] & 0x0c) { - case 0x00: - width = height * 4 / 3; - break; - case 0x04: - width = height * 16 / 9; - break; - case 0x08: - width = height * 16 / 10; - break; - case 0x0c: - width = height * 15 / 9; - break; - } - - for (j = 1; j < 5; j++) { - if (cvt->code[2] & (1 << j)) { - newmode = drm_cvt_mode(dev, width, height, - rates[j], j == 0, - false, false); - if (newmode) { - drm_mode_probed_add(connector, newmode); - modes++; - } - } - } - } - - return modes; -} - -static void -do_cvt_mode(struct detailed_timing *timing, void *c) -{ - struct detailed_mode_closure *closure = c; - struct detailed_non_pixel *data = &timing->data.other_data; - - if (data->type == EDID_DETAIL_CVT_3BYTE) - closure->modes += drm_cvt_modes(closure->connector, timing); -} - -static int -add_cvt_modes(struct drm_connector *connector, struct edid *edid) -{ - struct detailed_mode_closure closure = { - connector, edid, 0, 0, 0 - }; - - if (version_greater(edid, 1, 2)) - drm_for_each_detailed_block((u8 *)edid, do_cvt_mode, &closure); - - /* XXX should also look for CVT codes in VTB blocks */ - - return closure.modes; -} - -static void -do_detailed_mode(struct detailed_timing *timing, void *c) -{ - struct detailed_mode_closure *closure = c; - struct drm_display_mode *newmode; - - if (timing->pixel_clock) { - newmode = drm_mode_detailed(closure->connector->dev, - closure->edid, timing, - closure->quirks); - if (!newmode) - return; - - if (closure->preferred) - newmode->type |= DRM_MODE_TYPE_PREFERRED; - - drm_mode_probed_add(closure->connector, newmode); - closure->modes++; - closure->preferred = 0; - } -} - -/* - * add_detailed_modes - Add modes from detailed timings - * @connector: attached connector - * @edid: EDID block to scan - * @quirks: quirks to apply - */ -static int -add_detailed_modes(struct drm_connector *connector, struct edid *edid, - u32 quirks) -{ - struct detailed_mode_closure closure = { - connector, - edid, - 1, - quirks, - 0 - }; - - if (closure.preferred && !version_greater(edid, 1, 3)) - closure.preferred = - (edid->features & DRM_EDID_FEATURE_PREFERRED_TIMING); - - drm_for_each_detailed_block((u8 *)edid, do_detailed_mode, &closure); - - return closure.modes; -} - -#define HDMI_IDENTIFIER 0x000C03 -#define AUDIO_BLOCK 0x01 -#define VIDEO_BLOCK 0x02 -#define VENDOR_BLOCK 0x03 -#define SPEAKER_BLOCK 0x04 -#define EDID_BASIC_AUDIO (1 << 6) - -/** - * Search EDID for CEA extension block. - */ -u8 *drm_find_cea_extension(struct edid *edid) -{ - u8 *edid_ext = NULL; - int i; - - /* No EDID or EDID extensions */ - if (edid == NULL || edid->extensions == 0) - return NULL; - - /* Find CEA extension */ - for (i = 0; i < edid->extensions; i++) { - edid_ext = (u8 *)edid + EDID_LENGTH * (i + 1); - if (edid_ext[0] == CEA_EXT) - break; - } - - if (i == edid->extensions) - return NULL; - - return edid_ext; -} -EXPORT_SYMBOL(drm_find_cea_extension); - -static int -do_cea_modes (struct drm_connector *connector, u8 *db, u8 len) -{ - struct drm_device *dev = connector->dev; - u8 * mode, cea_mode; - int modes = 0; - - for (mode = db; mode < db + len; mode++) { - cea_mode = (*mode & 127) - 1; /* CEA modes are numbered 1..127 */ - if (cea_mode < drm_num_cea_modes) { - struct drm_display_mode *newmode; - newmode = drm_mode_duplicate(dev, - &edid_cea_modes[cea_mode]); - if (newmode) { - drm_mode_probed_add(connector, newmode); - modes++; - } - } - } - - return modes; -} - -static int -add_cea_modes(struct drm_connector *connector, struct edid *edid) -{ - u8 * cea = drm_find_cea_extension(edid); - u8 * db, dbl; - int modes = 0; - - if (cea && cea[1] >= 3) { - for (db = cea + 4; db < cea + cea[2]; db += dbl + 1) { - dbl = db[0] & 0x1f; - if (((db[0] & 0xe0) >> 5) == VIDEO_BLOCK) - modes += do_cea_modes (connector, db+1, dbl); - } - } - - return modes; -} - -static void -parse_hdmi_vsdb(struct drm_connector *connector, uint8_t *db) -{ - connector->eld[5] |= (db[6] >> 7) << 1; /* Supports_AI */ - - connector->dvi_dual = db[6] & 1; - connector->max_tmds_clock = db[7] * 5; - - connector->latency_present[0] = db[8] >> 7; - connector->latency_present[1] = (db[8] >> 6) & 1; - connector->video_latency[0] = db[9]; - connector->audio_latency[0] = db[10]; - connector->video_latency[1] = db[11]; - connector->audio_latency[1] = db[12]; - - DRM_LOG_KMS("HDMI: DVI dual %d, " - "max TMDS clock %d, " - "latency present %d %d, " - "video latency %d %d, " - "audio latency %d %d\n", - connector->dvi_dual, - connector->max_tmds_clock, - (int) connector->latency_present[0], - (int) connector->latency_present[1], - connector->video_latency[0], - connector->video_latency[1], - connector->audio_latency[0], - connector->audio_latency[1]); -} - -static void -monitor_name(struct detailed_timing *t, void *data) -{ - if (t->data.other_data.type == EDID_DETAIL_MONITOR_NAME) - *(u8 **)data = t->data.other_data.data.str.str; -} - -/** - * drm_edid_to_eld - build ELD from EDID - * @connector: connector corresponding to the HDMI/DP sink - * @edid: EDID to parse - * - * Fill the ELD (EDID-Like Data) buffer for passing to the audio driver. - * Some ELD fields are left to the graphics driver caller: - * - Conn_Type - * - HDCP - * - Port_ID - */ -void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid) -{ - uint8_t *eld = connector->eld; - u8 *cea; - u8 *name; - u8 *db; - int sad_count = 0; - int mnl; - int dbl; - - memset(eld, 0, sizeof(connector->eld)); - - cea = drm_find_cea_extension(edid); - if (!cea) { - DRM_DEBUG_KMS("ELD: no CEA Extension found\n"); - return; - } - - name = NULL; - drm_for_each_detailed_block((u8 *)edid, monitor_name, &name); - for (mnl = 0; name && mnl < 13; mnl++) { - if (name[mnl] == 0x0a) - break; - eld[20 + mnl] = name[mnl]; - } - eld[4] = (cea[1] << 5) | mnl; - DRM_DEBUG_KMS("ELD monitor %s\n", eld + 20); - - eld[0] = 2 << 3; /* ELD version: 2 */ - - eld[16] = edid->mfg_id[0]; - eld[17] = edid->mfg_id[1]; - eld[18] = edid->prod_code[0]; - eld[19] = edid->prod_code[1]; - - if (cea[1] >= 3) - for (db = cea + 4; db < cea + cea[2]; db += dbl + 1) { - dbl = db[0] & 0x1f; - - switch ((db[0] & 0xe0) >> 5) { - case AUDIO_BLOCK: - /* Audio Data Block, contains SADs */ - sad_count = dbl / 3; - memcpy(eld + 20 + mnl, &db[1], dbl); - break; - case SPEAKER_BLOCK: - /* Speaker Allocation Data Block */ - eld[7] = db[1]; - break; - case VENDOR_BLOCK: - /* HDMI Vendor-Specific Data Block */ - if (db[1] == 0x03 && db[2] == 0x0c && db[3] == 0) - parse_hdmi_vsdb(connector, db); - break; - default: - break; - } - } - eld[5] |= sad_count << 4; - eld[2] = (20 + mnl + sad_count * 3 + 3) / 4; - - DRM_DEBUG_KMS("ELD size %d, SAD count %d\n", (int)eld[2], sad_count); -} -EXPORT_SYMBOL(drm_edid_to_eld); - -/** - * drm_av_sync_delay - HDMI/DP sink audio-video sync delay in millisecond - * @connector: connector associated with the HDMI/DP sink - * @mode: the display mode - */ -int drm_av_sync_delay(struct drm_connector *connector, - struct drm_display_mode *mode) -{ - int i = !!(mode->flags & DRM_MODE_FLAG_INTERLACE); - int a, v; - - if (!connector->latency_present[0]) - return 0; - if (!connector->latency_present[1]) - i = 0; - - a = connector->audio_latency[i]; - v = connector->video_latency[i]; - - /* - * HDMI/DP sink doesn't support audio or video? - */ - if (a == 255 || v == 255) - return 0; - - /* - * Convert raw EDID values to millisecond. - * Treat unknown latency as 0ms. - */ - if (a) - a = min(2 * (a - 1), 500); - if (v) - v = min(2 * (v - 1), 500); - - return max(v - a, 0); -} -EXPORT_SYMBOL(drm_av_sync_delay); - -/** - * drm_select_eld - select one ELD from multiple HDMI/DP sinks - * @encoder: the encoder just changed display mode - * @mode: the adjusted display mode - * - * It's possible for one encoder to be associated with multiple HDMI/DP sinks. - * The policy is now hard coded to simply use the first HDMI/DP sink's ELD. - */ -struct drm_connector *drm_select_eld(struct drm_encoder *encoder, - struct drm_display_mode *mode) -{ - struct drm_connector *connector; - struct drm_device *dev = encoder->dev; - - list_for_each_entry(connector, &dev->mode_config.connector_list, head) - if (connector->encoder == encoder && connector->eld[0]) - return connector; - - return NULL; -} -EXPORT_SYMBOL(drm_select_eld); - -/** - * drm_detect_hdmi_monitor - detect whether monitor is hdmi. - * @edid: monitor EDID information - * - * Parse the CEA extension according to CEA-861-B. - * Return true if HDMI, false if not or unknown. - */ -bool drm_detect_hdmi_monitor(struct edid *edid) -{ - u8 *edid_ext; - int i, hdmi_id; - int start_offset, end_offset; - bool is_hdmi = false; - - edid_ext = drm_find_cea_extension(edid); - if (!edid_ext) - goto end; - - /* Data block offset in CEA extension block */ - start_offset = 4; - end_offset = edid_ext[2]; - - /* - * Because HDMI identifier is in Vendor Specific Block, - * search it from all data blocks of CEA extension. - */ - for (i = start_offset; i < end_offset; - /* Increased by data block len */ - i += ((edid_ext[i] & 0x1f) + 1)) { - /* Find vendor specific block */ - if ((edid_ext[i] >> 5) == VENDOR_BLOCK) { - hdmi_id = edid_ext[i + 1] | (edid_ext[i + 2] << 8) | - edid_ext[i + 3] << 16; - /* Find HDMI identifier */ - if (hdmi_id == HDMI_IDENTIFIER) - is_hdmi = true; - break; - } - } - -end: - return is_hdmi; -} -EXPORT_SYMBOL(drm_detect_hdmi_monitor); - -/** - * drm_detect_monitor_audio - check monitor audio capability - * - * Monitor should have CEA extension block. - * If monitor has 'basic audio', but no CEA audio blocks, it's 'basic - * audio' only. If there is any audio extension block and supported - * audio format, assume at least 'basic audio' support, even if 'basic - * audio' is not defined in EDID. - * - */ -bool drm_detect_monitor_audio(struct edid *edid) -{ - u8 *edid_ext; - int i, j; - bool has_audio = false; - int start_offset, end_offset; - - edid_ext = drm_find_cea_extension(edid); - if (!edid_ext) - goto end; - - has_audio = ((edid_ext[3] & EDID_BASIC_AUDIO) != 0); - - if (has_audio) { - DRM_DEBUG_KMS("Monitor has basic audio support\n"); - goto end; - } - - /* Data block offset in CEA extension block */ - start_offset = 4; - end_offset = edid_ext[2]; - - for (i = start_offset; i < end_offset; - i += ((edid_ext[i] & 0x1f) + 1)) { - if ((edid_ext[i] >> 5) == AUDIO_BLOCK) { - has_audio = true; - for (j = 1; j < (edid_ext[i] & 0x1f); j += 3) - DRM_DEBUG_KMS("CEA audio format %d\n", - (edid_ext[i + j] >> 3) & 0xf); - goto end; - } - } -end: - return has_audio; -} -EXPORT_SYMBOL(drm_detect_monitor_audio); - -/** - * drm_add_display_info - pull display info out if present - * @edid: EDID data - * @info: display info (attached to connector) - * - * Grab any available display info and stuff it into the drm_display_info - * structure that's part of the connector. Useful for tracking bpp and - * color spaces. - */ -static void drm_add_display_info(struct edid *edid, - struct drm_display_info *info) -{ - u8 *edid_ext; - - info->width_mm = edid->width_cm * 10; - info->height_mm = edid->height_cm * 10; - - /* driver figures it out in this case */ - info->bpc = 0; - info->color_formats = 0; - - /* Only defined for 1.4 with digital displays */ - if (edid->revision < 4) - return; - - if (!(edid->input & DRM_EDID_INPUT_DIGITAL)) - return; - - switch (edid->input & DRM_EDID_DIGITAL_DEPTH_MASK) { - case DRM_EDID_DIGITAL_DEPTH_6: - info->bpc = 6; - break; - case DRM_EDID_DIGITAL_DEPTH_8: - info->bpc = 8; - break; - case DRM_EDID_DIGITAL_DEPTH_10: - info->bpc = 10; - break; - case DRM_EDID_DIGITAL_DEPTH_12: - info->bpc = 12; - break; - case DRM_EDID_DIGITAL_DEPTH_14: - info->bpc = 14; - break; - case DRM_EDID_DIGITAL_DEPTH_16: - info->bpc = 16; - break; - case DRM_EDID_DIGITAL_DEPTH_UNDEF: - default: - info->bpc = 0; - break; - } - - info->color_formats = DRM_COLOR_FORMAT_RGB444; - if (info->color_formats & DRM_EDID_FEATURE_RGB_YCRCB444) - info->color_formats = DRM_COLOR_FORMAT_YCRCB444; - if (info->color_formats & DRM_EDID_FEATURE_RGB_YCRCB422) - info->color_formats = DRM_COLOR_FORMAT_YCRCB422; - - /* Get data from CEA blocks if present */ - edid_ext = drm_find_cea_extension(edid); - if (!edid_ext) - return; - - info->cea_rev = edid_ext[1]; -} - -/** - * 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 (!drm_edid_is_valid(edid)) { - dev_warn(connector->dev->dev, "%s: EDID invalid.\n", - drm_get_connector_name(connector)); - return 0; - } - - quirks = edid_get_quirks(edid); - - /* - * EDID spec says modes should be preferred in this order: - * - preferred detailed mode - * - other detailed modes from base block - * - detailed modes from extension blocks - * - CVT 3-byte code modes - * - standard timing codes - * - established timing codes - * - modes inferred from GTF or CVT range information - * - * We get this pretty much right. - * - * XXX order for additional mode types in extension blocks? - */ - num_modes += add_detailed_modes(connector, edid, quirks); - num_modes += add_cvt_modes(connector, edid); - num_modes += add_standard_modes(connector, edid); - num_modes += add_established_modes(connector, edid); - num_modes += add_inferred_modes(connector, edid); - num_modes += add_cea_modes(connector, edid); - - if (quirks & (EDID_QUIRK_PREFER_LARGE_60 | EDID_QUIRK_PREFER_LARGE_75)) - edid_fixup_preferred(connector, quirks); - - drm_add_display_info(edid, &connector->display_info); - - return num_modes; -} -EXPORT_SYMBOL(drm_add_edid_modes); - -/** - * drm_add_modes_noedid - add modes for the connectors without EDID - * @connector: connector we're probing - * @hdisplay: the horizontal display limit - * @vdisplay: the vertical display limit - * - * Add the specified modes to the connector's mode list. Only when the - * hdisplay/vdisplay is not beyond the given limit, it will be added. - * - * Return number of modes added or 0 if we couldn't find any. - */ -int drm_add_modes_noedid(struct drm_connector *connector, - int hdisplay, int vdisplay) -{ - int i, count, num_modes = 0; - struct drm_display_mode *mode; - struct drm_device *dev = connector->dev; - - count = sizeof(drm_dmt_modes) / sizeof(struct drm_display_mode); - if (hdisplay < 0) - hdisplay = 0; - if (vdisplay < 0) - vdisplay = 0; - - for (i = 0; i < count; i++) { - const struct drm_display_mode *ptr = &drm_dmt_modes[i]; - if (hdisplay && vdisplay) { - /* - * Only when two are valid, they will be used to check - * whether the mode should be added to the mode list of - * the connector. - */ - if (ptr->hdisplay > hdisplay || - ptr->vdisplay > vdisplay) - continue; - } - if (drm_mode_vrefresh(ptr) > 61) - continue; - mode = drm_mode_duplicate(dev, ptr); - if (mode) { - drm_mode_probed_add(connector, mode); - num_modes++; - } - } - return num_modes; -} -EXPORT_SYMBOL(drm_add_modes_noedid); |