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synced 2024-08-25 02:09:42 +00:00
drm/edid: index CEA/HDMI mode tables using the VIC
Add a dummy entry to CEA/HDMI mode tables so they can be indexed directly using the VIC, avoiding a +1/-1 dance here and there. This adds clarity to the error checking for various functions that return the VIC on success and zero on failure; we can now explicitly check for 0 instead of just subtracting one from an unsigned type. Also add drm_valid_cea_vic() and drm_valid_hdmi_vic() helpers for checking valid VICs. v2: add drm_valid_cea_vic and drm_valid_hdmi_vic helpers (Ville) use { } instead of { 0 } for initializing the dummy modes Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1452252111-6439-1-git-send-email-jani.nikula@intel.com Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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14de6c44d1
commit
d9278b4c2c
1 changed files with 53 additions and 41 deletions
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@ -637,8 +637,12 @@ static const struct minimode extra_modes[] = {
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/*
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* Probably taken from CEA-861 spec.
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* This table is converted from xorg's hw/xfree86/modes/xf86EdidModes.c.
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*
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* Index using the VIC.
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*/
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static const struct drm_display_mode edid_cea_modes[] = {
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/* 0 - dummy, VICs start at 1 */
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{ },
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/* 1 - 640x480@60Hz */
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{ DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 25175, 640, 656,
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752, 800, 0, 480, 490, 492, 525, 0,
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@ -987,9 +991,11 @@ static const struct drm_display_mode edid_cea_modes[] = {
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};
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/*
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* HDMI 1.4 4k modes.
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* HDMI 1.4 4k modes. Index using the VIC.
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*/
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static const struct drm_display_mode edid_4k_modes[] = {
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/* 0 - dummy, VICs start at 1 */
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{ },
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/* 1 - 3840x2160@30Hz */
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{ DRM_MODE("3840x2160", DRM_MODE_TYPE_DRIVER, 297000,
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3840, 4016, 4104, 4400, 0,
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@ -2548,13 +2554,13 @@ cea_mode_alternate_clock(const struct drm_display_mode *cea_mode)
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static u8 drm_match_cea_mode_clock_tolerance(const struct drm_display_mode *to_match,
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unsigned int clock_tolerance)
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{
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u8 mode;
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u8 vic;
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if (!to_match->clock)
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return 0;
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for (mode = 0; mode < ARRAY_SIZE(edid_cea_modes); mode++) {
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const struct drm_display_mode *cea_mode = &edid_cea_modes[mode];
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for (vic = 1; vic < ARRAY_SIZE(edid_cea_modes); vic++) {
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const struct drm_display_mode *cea_mode = &edid_cea_modes[vic];
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unsigned int clock1, clock2;
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/* Check both 60Hz and 59.94Hz */
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@ -2566,7 +2572,7 @@ static u8 drm_match_cea_mode_clock_tolerance(const struct drm_display_mode *to_m
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continue;
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if (drm_mode_equal_no_clocks(to_match, cea_mode))
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return mode + 1;
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return vic;
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}
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return 0;
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@ -2581,13 +2587,13 @@ static u8 drm_match_cea_mode_clock_tolerance(const struct drm_display_mode *to_m
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*/
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u8 drm_match_cea_mode(const struct drm_display_mode *to_match)
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{
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u8 mode;
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u8 vic;
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if (!to_match->clock)
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return 0;
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for (mode = 0; mode < ARRAY_SIZE(edid_cea_modes); mode++) {
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const struct drm_display_mode *cea_mode = &edid_cea_modes[mode];
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for (vic = 1; vic < ARRAY_SIZE(edid_cea_modes); vic++) {
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const struct drm_display_mode *cea_mode = &edid_cea_modes[vic];
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unsigned int clock1, clock2;
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/* Check both 60Hz and 59.94Hz */
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@ -2597,12 +2603,17 @@ u8 drm_match_cea_mode(const struct drm_display_mode *to_match)
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if ((KHZ2PICOS(to_match->clock) == KHZ2PICOS(clock1) ||
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KHZ2PICOS(to_match->clock) == KHZ2PICOS(clock2)) &&
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drm_mode_equal_no_clocks_no_stereo(to_match, cea_mode))
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return mode + 1;
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return vic;
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}
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return 0;
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}
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EXPORT_SYMBOL(drm_match_cea_mode);
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static bool drm_valid_cea_vic(u8 vic)
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{
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return vic > 0 && vic < ARRAY_SIZE(edid_cea_modes);
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}
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/**
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* drm_get_cea_aspect_ratio - get the picture aspect ratio corresponding to
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* the input VIC from the CEA mode list
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@ -2612,10 +2623,7 @@ EXPORT_SYMBOL(drm_match_cea_mode);
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*/
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enum hdmi_picture_aspect drm_get_cea_aspect_ratio(const u8 video_code)
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{
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/* return picture aspect ratio for video_code - 1 to access the
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* right array element
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*/
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return edid_cea_modes[video_code-1].picture_aspect_ratio;
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return edid_cea_modes[video_code].picture_aspect_ratio;
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}
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EXPORT_SYMBOL(drm_get_cea_aspect_ratio);
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@ -2639,13 +2647,13 @@ hdmi_mode_alternate_clock(const struct drm_display_mode *hdmi_mode)
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static u8 drm_match_hdmi_mode_clock_tolerance(const struct drm_display_mode *to_match,
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unsigned int clock_tolerance)
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{
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u8 mode;
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u8 vic;
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if (!to_match->clock)
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return 0;
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for (mode = 0; mode < ARRAY_SIZE(edid_4k_modes); mode++) {
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const struct drm_display_mode *hdmi_mode = &edid_4k_modes[mode];
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for (vic = 1; vic < ARRAY_SIZE(edid_4k_modes); vic++) {
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const struct drm_display_mode *hdmi_mode = &edid_4k_modes[vic];
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unsigned int clock1, clock2;
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/* Make sure to also match alternate clocks */
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@ -2657,7 +2665,7 @@ static u8 drm_match_hdmi_mode_clock_tolerance(const struct drm_display_mode *to_
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continue;
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if (drm_mode_equal_no_clocks(to_match, hdmi_mode))
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return mode + 1;
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return vic;
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}
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return 0;
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@ -2673,13 +2681,13 @@ static u8 drm_match_hdmi_mode_clock_tolerance(const struct drm_display_mode *to_
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*/
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static u8 drm_match_hdmi_mode(const struct drm_display_mode *to_match)
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{
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u8 mode;
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u8 vic;
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if (!to_match->clock)
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return 0;
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for (mode = 0; mode < ARRAY_SIZE(edid_4k_modes); mode++) {
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const struct drm_display_mode *hdmi_mode = &edid_4k_modes[mode];
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for (vic = 1; vic < ARRAY_SIZE(edid_4k_modes); vic++) {
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const struct drm_display_mode *hdmi_mode = &edid_4k_modes[vic];
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unsigned int clock1, clock2;
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/* Make sure to also match alternate clocks */
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@ -2689,11 +2697,16 @@ static u8 drm_match_hdmi_mode(const struct drm_display_mode *to_match)
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if ((KHZ2PICOS(to_match->clock) == KHZ2PICOS(clock1) ||
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KHZ2PICOS(to_match->clock) == KHZ2PICOS(clock2)) &&
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drm_mode_equal_no_clocks_no_stereo(to_match, hdmi_mode))
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return mode + 1;
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return vic;
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}
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return 0;
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}
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static bool drm_valid_hdmi_vic(u8 vic)
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{
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return vic > 0 && vic < ARRAY_SIZE(edid_4k_modes);
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}
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static int
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add_alternate_cea_modes(struct drm_connector *connector, struct edid *edid)
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{
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@ -2713,16 +2726,16 @@ add_alternate_cea_modes(struct drm_connector *connector, struct edid *edid)
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list_for_each_entry(mode, &connector->probed_modes, head) {
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const struct drm_display_mode *cea_mode = NULL;
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struct drm_display_mode *newmode;
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u8 mode_idx = drm_match_cea_mode(mode) - 1;
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u8 vic = drm_match_cea_mode(mode);
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unsigned int clock1, clock2;
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if (mode_idx < ARRAY_SIZE(edid_cea_modes)) {
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cea_mode = &edid_cea_modes[mode_idx];
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if (drm_valid_cea_vic(vic)) {
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cea_mode = &edid_cea_modes[vic];
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clock2 = cea_mode_alternate_clock(cea_mode);
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} else {
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mode_idx = drm_match_hdmi_mode(mode) - 1;
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if (mode_idx < ARRAY_SIZE(edid_4k_modes)) {
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cea_mode = &edid_4k_modes[mode_idx];
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vic = drm_match_hdmi_mode(mode);
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if (drm_valid_hdmi_vic(vic)) {
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cea_mode = &edid_4k_modes[vic];
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clock2 = hdmi_mode_alternate_clock(cea_mode);
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}
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}
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@ -2773,17 +2786,17 @@ drm_display_mode_from_vic_index(struct drm_connector *connector,
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{
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struct drm_device *dev = connector->dev;
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struct drm_display_mode *newmode;
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u8 cea_mode;
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u8 vic;
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if (video_db == NULL || video_index >= video_len)
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return NULL;
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/* CEA modes are numbered 1..127 */
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cea_mode = (video_db[video_index] & 127) - 1;
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if (cea_mode >= ARRAY_SIZE(edid_cea_modes))
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vic = (video_db[video_index] & 127);
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if (!drm_valid_cea_vic(vic))
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return NULL;
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newmode = drm_mode_duplicate(dev, &edid_cea_modes[cea_mode]);
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newmode = drm_mode_duplicate(dev, &edid_cea_modes[vic]);
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if (!newmode)
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return NULL;
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@ -2878,8 +2891,7 @@ static int add_hdmi_mode(struct drm_connector *connector, u8 vic)
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struct drm_device *dev = connector->dev;
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struct drm_display_mode *newmode;
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vic--; /* VICs start at 1 */
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if (vic >= ARRAY_SIZE(edid_4k_modes)) {
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if (!drm_valid_hdmi_vic(vic)) {
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DRM_ERROR("Unknown HDMI VIC: %d\n", vic);
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return 0;
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}
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@ -3170,24 +3182,24 @@ static void fixup_detailed_cea_mode_clock(struct drm_display_mode *mode)
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{
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const struct drm_display_mode *cea_mode;
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int clock1, clock2, clock;
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u8 mode_idx;
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u8 vic;
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const char *type;
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/*
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* allow 5kHz clock difference either way to account for
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* the 10kHz clock resolution limit of detailed timings.
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*/
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mode_idx = drm_match_cea_mode_clock_tolerance(mode, 5) - 1;
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if (mode_idx < ARRAY_SIZE(edid_cea_modes)) {
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vic = drm_match_cea_mode_clock_tolerance(mode, 5);
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if (drm_valid_cea_vic(vic)) {
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type = "CEA";
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cea_mode = &edid_cea_modes[mode_idx];
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cea_mode = &edid_cea_modes[vic];
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clock1 = cea_mode->clock;
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clock2 = cea_mode_alternate_clock(cea_mode);
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} else {
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mode_idx = drm_match_hdmi_mode_clock_tolerance(mode, 5) - 1;
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if (mode_idx < ARRAY_SIZE(edid_4k_modes)) {
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vic = drm_match_hdmi_mode_clock_tolerance(mode, 5);
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if (drm_valid_hdmi_vic(vic)) {
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type = "HDMI";
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cea_mode = &edid_4k_modes[mode_idx];
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cea_mode = &edid_4k_modes[vic];
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clock1 = cea_mode->clock;
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clock2 = hdmi_mode_alternate_clock(cea_mode);
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} else {
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@ -3205,7 +3217,7 @@ static void fixup_detailed_cea_mode_clock(struct drm_display_mode *mode)
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return;
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DRM_DEBUG("detailed mode matches %s VIC %d, adjusting clock %d -> %d\n",
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type, mode_idx + 1, mode->clock, clock);
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type, vic, mode->clock, clock);
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mode->clock = clock;
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}
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