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authorRafał Miłecki <zajec5@gmail.com>2013-04-19 21:01:25 +0400
committerAlex Deucher <alexander.deucher@amd.com>2013-04-24 02:03:58 +0400
commitfe214163cc6e6b33253b7ac14bc3dd616e76b513 (patch)
tree32c17795c76da99c458c61f71127d4897f82deb3 /include/drm/drm_edid.h
parent205996c0776a229052c33688ee58a605a021740d (diff)
downloadlinux-fe214163cc6e6b33253b7ac14bc3dd616e76b513.tar.xz
drm: add drm_edid_to_eld helper extracting SADs from EDID (v2)
Some devices (ATI/AMD cards) don't support passing ELD struct to the hardware but just require filling specific registers and then the hardware/firmware does the rest. In such cases we need to read the info from SAD blocks and put them in the correct registers. agd5f: note that the returned pointer needs to be kfreed as per Christian's suggestion. v2: fix warning Signed-off-by: Rafał Miłecki <zajec5@gmail.com> Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'include/drm/drm_edid.h')
-rw-r--r--include/drm/drm_edid.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h
index 5da1b4ae7d84..fc481fc17085 100644
--- a/include/drm/drm_edid.h
+++ b/include/drm/drm_edid.h
@@ -244,12 +244,21 @@ struct edid {
#define EDID_PRODUCT_ID(e) ((e)->prod_code[0] | ((e)->prod_code[1] << 8))
+/* Short Audio Descriptor */
+struct cea_sad {
+ u8 format;
+ u8 channels; /* max number of channels - 1 */
+ u8 freq;
+ u8 byte2; /* meaning depends on format */
+};
+
struct drm_encoder;
struct drm_connector;
struct drm_display_mode;
struct hdmi_avi_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);
int drm_av_sync_delay(struct drm_connector *connector,
struct drm_display_mode *mode);
struct drm_connector *drm_select_eld(struct drm_encoder *encoder,