diff options
| author | Lespiau, Damien <damien.lespiau@intel.com> | 2013-08-19 16:59:03 +0100 |
|---|---|---|
| committer | Dave Airlie <airlied@gmail.com> | 2013-08-30 08:41:49 +1000 |
| commit | 83dd000865eaaeb0799bf5e6d12f8d8cdb740e91 (patch) | |
| tree | 3a5f3a0fc7b50e44e58f1c666bdffb62a9afe599 | |
| parent | ae84b900b009589a7017a1f8f060edd7de501642 (diff) | |
drm: Add a helper to forge HDMI vendor infoframes
This can then be used by DRM drivers to setup their vendor infoframes.
v2: Fix hmdi typo (Simon Farnsworth)
v3: Adapt to the hdmi_vendor_infoframe rename
Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Reviewed-by: Simon Farnsworth <simon.farnsworth@onelan.co.uk>
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 | 36 | ||||
| -rw-r--r-- | include/drm/drm_edid.h | 4 |
2 files changed, 40 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 3aa653fd03a7..ed3505fe8ace 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -3263,3 +3263,39 @@ drm_hdmi_avi_infoframe_from_display_mode(struct hdmi_avi_infoframe *frame, return 0; } EXPORT_SYMBOL(drm_hdmi_avi_infoframe_from_display_mode); + +/** + * drm_hdmi_vendor_infoframe_from_display_mode() - fill an HDMI infoframe with + * data from a DRM display mode + * @frame: HDMI vendor infoframe + * @mode: DRM display mode + * + * Note that there's is a need to send HDMI vendor infoframes only when using a + * 4k or stereoscopic 3D mode. So when giving any other mode as input this + * function will return -EINVAL, error that can be safely ignored. + * + * Returns 0 on success or a negative error code on failure. + */ +int +drm_hdmi_vendor_infoframe_from_display_mode(struct hdmi_vendor_infoframe *frame, + const struct drm_display_mode *mode) +{ + int err; + u8 vic; + + if (!frame || !mode) + return -EINVAL; + + vic = drm_match_hdmi_mode(mode); + if (!vic) + return -EINVAL; + + err = hdmi_vendor_infoframe_init(frame); + if (err < 0) + return err; + + frame->vic = vic; + + return 0; +} +EXPORT_SYMBOL(drm_hdmi_vendor_infoframe_from_display_mode); diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h index fc481fc17085..7b75621fda4c 100644 --- a/include/drm/drm_edid.h +++ b/include/drm/drm_edid.h @@ -256,6 +256,7 @@ struct drm_encoder; struct drm_connector; struct drm_display_mode; struct hdmi_avi_infoframe; +struct hdmi_vendor_infoframe; void drm_edid_to_eld(struct drm_connector *connector, struct edid *edid); int drm_edid_to_sad(struct edid *edid, struct cea_sad **sads); @@ -268,5 +269,8 @@ int drm_load_edid_firmware(struct drm_connector *connector); int drm_hdmi_avi_infoframe_from_display_mode(struct hdmi_avi_infoframe *frame, const struct drm_display_mode *mode); +int +drm_hdmi_vendor_infoframe_from_display_mode(struct hdmi_vendor_infoframe *frame, + const struct drm_display_mode *mode); #endif /* __DRM_EDID_H__ */ |