Regards
Shashank
On 11/13/2017 10:34 PM, Ville Syrjala wrote:
From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
If the user mode would specify an aspect ratio other than 4:3 or 16:9
we now silently ignore it. Maybe a better apporoach is to return an
error? Let's try that.
Also we must be careful that we don't try to send illegal picture
aspect in the infoframe as it's only capable of signalling none,
4:3, and 16:9. Currently we're sending these bogus infoframes
whenever the cea mode specifies some other aspect ratio.
Cc: Shashank Sharma <shashank.sharma@xxxxxxxxx>
Cc: Sean Paul <seanpaul@xxxxxxxxxxxx>
Cc: Jose Abreu <Jose.Abreu@xxxxxxxxxxxx>
Cc: Daniel Vetter <daniel.vetter@xxxxxxxx>
Cc: Emil Velikov <emil.l.velikov@xxxxxxxxx>
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/drm_edid.c | 23 +++++++++++++++++------
1 file changed, 17 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 00aa98f3e55d..bafb3ee4ea97 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -4786,6 +4786,7 @@ drm_hdmi_avi_infoframe_from_display_mode(struct hdmi_avi_infoframe *frame,
const struct drm_display_mode *mode,
bool is_hdmi2_sink)
{
+ enum hdmi_picture_aspect picture_aspect;
int err;
if (!frame || !mode)
@@ -4828,13 +4829,23 @@ 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.
*/
- if (mode->picture_aspect_ratio == HDMI_PICTURE_ASPECT_4_3 ||
- mode->picture_aspect_ratio == HDMI_PICTURE_ASPECT_16_9)
- frame->picture_aspect = mode->picture_aspect_ratio;
- else if (frame->video_code > 0)
- frame->picture_aspect = drm_get_cea_aspect_ratio(
- frame->video_code);
+ picture_aspect = mode->picture_aspect_ratio;
+ if (picture_aspect == HDMI_PICTURE_ASPECT_NONE)
+ picture_aspect = drm_get_cea_aspect_ratio(frame->video_code);
This is slightly going in the loop.
- During the modeset the driver cant specify the aspect ratio
information, as DRM layer lacks this support.
- So we fill the VIC field, by comparing the mode with the
DRM_CEA_MODES[] list. This will pick the first mode
available in the list (regardless of its aspect ratio), and fill the
VIC, as we don't consider aspect ratio while comparing timings.
- Again, now while sending the aspect ratio, we are picking up the VIC,
which may not be correct.
So if we have 720x480(4:3) and 720x480(16:9) in the list, as 4:3 is
first in list, we will always pick 4:3 aspect ratio.
- Shashank
+ /*
+ * The infoframe can't convey anything but none, 4:3
+ * and 16:9, so if the user has asked for anything else
+ * 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))
+ return -EINVAL;
+ picture_aspect = HDMI_PICTURE_ASPECT_NONE;
+ }
+
+ frame->picture_aspect = picture_aspect;
frame->active_aspect = HDMI_ACTIVE_ASPECT_PICTURE;
frame->scan_mode = HDMI_SCAN_MODE_UNDERSCAN;
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