diff options
| author | Lespiau, Damien <damien.lespiau@intel.com> | 2013-08-19 16:58:56 +0100 |
|---|---|---|
| committer | Dave Airlie <airlied@gmail.com> | 2013-08-30 08:40:29 +1000 |
| commit | a5ad3dcf358475dfc5ccf11e28d3822fc3c8e5fe (patch) | |
| tree | ef41ba92f882da0c4422402cbacaecb034893fbc | |
| parent | 3f2f653378112c1453c0d83c81746a9225e4bc75 (diff) | |
| download | blackbird-op-linux-a5ad3dcf358475dfc5ccf11e28d3822fc3c8e5fe.tar.gz blackbird-op-linux-a5ad3dcf358475dfc5ccf11e28d3822fc3c8e5fe.zip | |
video/hdmi: Don't let the user of this API create invalid infoframes
To set the active aspect ratio value in the AVI infoframe today, you not
only have to set the active_aspect field, but also the active_info_valid
bit. Out of the 1 user of this API, we had 100% misuse, forgetting the
_valid bit. This was fixed in:
Author: Damien Lespiau <damien.lespiau@intel.com>
Date: Tue Aug 6 20:32:17 2013 +0100
drm: Don't generate invalid AVI infoframes for CEA modes
We can do better and derive the _valid bit from the user wanting to set
the active aspect ratio.
v2: Fix multi-lines comment style (Thierry Reding)
Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Dave Airlie <airlied@gmail.com>
| -rw-r--r-- | drivers/gpu/drm/drm_edid.c | 1 | ||||
| -rw-r--r-- | drivers/video/hdmi.c | 6 | ||||
| -rw-r--r-- | include/linux/hdmi.h | 1 |
3 files changed, 5 insertions, 3 deletions
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 2381abd452f1..d76d6089106f 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -3259,7 +3259,6 @@ drm_hdmi_avi_infoframe_from_display_mode(struct hdmi_avi_infoframe *frame, frame->video_code = drm_match_cea_mode(mode); frame->picture_aspect = HDMI_PICTURE_ASPECT_NONE; - frame->active_info_valid = 1; frame->active_aspect = HDMI_ACTIVE_ASPECT_PICTURE; return 0; diff --git a/drivers/video/hdmi.c b/drivers/video/hdmi.c index 635d5690dd5a..7ccc118fefed 100644 --- a/drivers/video/hdmi.c +++ b/drivers/video/hdmi.c @@ -96,7 +96,11 @@ ssize_t hdmi_avi_infoframe_pack(struct hdmi_avi_infoframe *frame, void *buffer, ptr[0] = ((frame->colorspace & 0x3) << 5) | (frame->scan_mode & 0x3); - if (frame->active_info_valid) + /* + * Data byte 1, bit 4 has to be set if we provide the active format + * aspect ratio + */ + if (frame->active_aspect & 0xf) ptr[0] |= BIT(4); if (frame->horizontal_bar_valid) diff --git a/include/linux/hdmi.h b/include/linux/hdmi.h index bc6743e76e37..931474c60b71 100644 --- a/include/linux/hdmi.h +++ b/include/linux/hdmi.h @@ -109,7 +109,6 @@ struct hdmi_avi_infoframe { unsigned char version; unsigned char length; enum hdmi_colorspace colorspace; - bool active_info_valid; bool horizontal_bar_valid; bool vertical_bar_valid; enum hdmi_scan_mode scan_mode; |
