From: Wayne Lin Wayne.Lin@amd.com
[ Upstream commit d2b434730f301a7ad74473eb66422f0008186306 ]
[Why] HDMI 2.0 adds aspect ratio attribute to distinguish different 4k modes. According to Appendix E of HDMI 2.0 spec, source should use VSIF to indicate video mode only when the mode is one defined in HDMI 1.4b 4K modes. Otherwise, use AVI infoframes to convey VIC.
Current code doesn't take aspect ratio into consideration while constructing avi infoframe. Should modify that.
[How] Inherit Ville Syrjälä's work "drm/edid: Prep for HDMI VIC aspect ratio" at https://patchwork.kernel.org/patch/11174639/
Add picture_aspect_ratio attributes to edid_4k_modes[] and construct VIC and HDMI_VIC by taking aspect ratio into consideration.
v2: Correct missing initializer error at adding aspect ratio of SMPTE mode.
Signed-off-by: Wayne Lin Wayne.Lin@amd.com Signed-off-by: Ville Syrjälä ville.syrjala@linux.intel.com Link: https://patchwork.freedesktop.org/patch/msgid/20191118101832.15487-1-Wayne.L... Stable-dep-of: 1cbc1f0d324b ("drm/edid: fix AVI infoframe aspect ratio handling") Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/drm_edid.c | 45 +++++++++++++++++++++++++++++--------- 1 file changed, 35 insertions(+), 10 deletions(-)
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 245e495f57c93..f9735861741c1 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -1292,25 +1292,25 @@ static const struct drm_display_mode edid_4k_modes[] = { 3840, 4016, 4104, 4400, 0, 2160, 2168, 2178, 2250, 0, DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC), - .vrefresh = 30, }, + .vrefresh = 30, .picture_aspect_ratio = HDMI_PICTURE_ASPECT_16_9, }, /* 2 - 3840x2160@25Hz */ { DRM_MODE("3840x2160", DRM_MODE_TYPE_DRIVER, 297000, 3840, 4896, 4984, 5280, 0, 2160, 2168, 2178, 2250, 0, DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC), - .vrefresh = 25, }, + .vrefresh = 25, .picture_aspect_ratio = HDMI_PICTURE_ASPECT_16_9, }, /* 3 - 3840x2160@24Hz */ { DRM_MODE("3840x2160", DRM_MODE_TYPE_DRIVER, 297000, 3840, 5116, 5204, 5500, 0, 2160, 2168, 2178, 2250, 0, DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC), - .vrefresh = 24, }, + .vrefresh = 24, .picture_aspect_ratio = HDMI_PICTURE_ASPECT_16_9, }, /* 4 - 4096x2160@24Hz (SMPTE) */ { DRM_MODE("4096x2160", DRM_MODE_TYPE_DRIVER, 297000, 4096, 5116, 5204, 5500, 0, 2160, 2168, 2178, 2250, 0, DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC), - .vrefresh = 24, }, + .vrefresh = 24, .picture_aspect_ratio = HDMI_PICTURE_ASPECT_256_135, }, };
/*** DDC fetch and block validation ***/ @@ -3122,6 +3122,11 @@ enum hdmi_picture_aspect drm_get_cea_aspect_ratio(const u8 video_code) } EXPORT_SYMBOL(drm_get_cea_aspect_ratio);
+static enum hdmi_picture_aspect drm_get_hdmi_aspect_ratio(const u8 video_code) +{ + return edid_4k_modes[video_code].picture_aspect_ratio; +} + /* * Calculate the alternate clock for HDMI modes (those from the HDMI vendor * specific block). @@ -3148,6 +3153,9 @@ static u8 drm_match_hdmi_mode_clock_tolerance(const struct drm_display_mode *to_ if (!to_match->clock) return 0;
+ if (to_match->picture_aspect_ratio) + match_flags |= DRM_MODE_MATCH_ASPECT_RATIO; + for (vic = 1; vic < ARRAY_SIZE(edid_4k_modes); vic++) { const struct drm_display_mode *hdmi_mode = &edid_4k_modes[vic]; unsigned int clock1, clock2; @@ -3183,6 +3191,9 @@ static u8 drm_match_hdmi_mode(const struct drm_display_mode *to_match) if (!to_match->clock) return 0;
+ if (to_match->picture_aspect_ratio) + match_flags |= DRM_MODE_MATCH_ASPECT_RATIO; + for (vic = 1; vic < ARRAY_SIZE(edid_4k_modes); vic++) { const struct drm_display_mode *hdmi_mode = &edid_4k_modes[vic]; unsigned int clock1, clock2; @@ -5123,6 +5134,7 @@ drm_hdmi_avi_infoframe_from_display_mode(struct hdmi_avi_infoframe *frame, const struct drm_display_mode *mode) { enum hdmi_picture_aspect picture_aspect; + u8 vic, hdmi_vic; int err;
if (!frame || !mode) @@ -5135,7 +5147,8 @@ drm_hdmi_avi_infoframe_from_display_mode(struct hdmi_avi_infoframe *frame, if (mode->flags & DRM_MODE_FLAG_DBLCLK) frame->pixel_repeat = 1;
- frame->video_code = drm_mode_cea_vic(connector, mode); + vic = drm_mode_cea_vic(connector, mode); + hdmi_vic = drm_mode_hdmi_vic(connector, mode);
frame->picture_aspect = HDMI_PICTURE_ASPECT_NONE;
@@ -5149,11 +5162,15 @@ drm_hdmi_avi_infoframe_from_display_mode(struct hdmi_avi_infoframe *frame,
/* * Populate picture aspect ratio from either - * user input (if specified) or from the CEA mode list. + * user input (if specified) or from the CEA/HDMI mode lists. */ picture_aspect = mode->picture_aspect_ratio; - if (picture_aspect == HDMI_PICTURE_ASPECT_NONE) - picture_aspect = drm_get_cea_aspect_ratio(frame->video_code); + if (picture_aspect == HDMI_PICTURE_ASPECT_NONE) { + if (vic) + picture_aspect = drm_get_cea_aspect_ratio(vic); + else if (hdmi_vic) + picture_aspect = drm_get_hdmi_aspect_ratio(hdmi_vic); + }
/* * The infoframe can't convey anything but none, 4:3 @@ -5161,12 +5178,20 @@ drm_hdmi_avi_infoframe_from_display_mode(struct hdmi_avi_infoframe *frame, * we can only satisfy it by specifying the right VIC. */ if (picture_aspect > HDMI_PICTURE_ASPECT_16_9) { - if (picture_aspect != - drm_get_cea_aspect_ratio(frame->video_code)) + if (vic) { + if (picture_aspect != drm_get_cea_aspect_ratio(vic)) + return -EINVAL; + } else if (hdmi_vic) { + if (picture_aspect != drm_get_hdmi_aspect_ratio(hdmi_vic)) + return -EINVAL; + } else { return -EINVAL; + } + picture_aspect = HDMI_PICTURE_ASPECT_NONE; }
+ frame->video_code = vic; frame->picture_aspect = picture_aspect; frame->active_aspect = HDMI_ACTIVE_ASPECT_PICTURE; frame->scan_mode = HDMI_SCAN_MODE_UNDERSCAN;