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drm/amd/display: Get replay info from VSDB

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We need to make sure that the panel supports replay.

This info is inside the amd vsdb (vendor specific data block). Create a
function to parse the block and read the replay_mode bit.

Signed-off-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Bhawanpreet Lakha
2023-06-12 14:06:39 -04:00
committed by Alex Deucher
parent 7957ec80ef
commit ec8e59cb4e
3 changed files with 64 additions and 0 deletions
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43
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
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@@ -10490,6 +10490,41 @@ static bool parse_edid_cea(struct amdgpu_dm_connector *aconnector,
return ret;
}
static int parse_amd_vsdb(struct amdgpu_dm_connector *aconnector,
struct edid *edid, struct amdgpu_hdmi_vsdb_info *vsdb_info)
{
u8 *edid_ext = NULL;
int i;
int j = 0;
if (edid == NULL || edid->extensions == 0)
return -ENODEV;
/* Find DisplayID extension */
for (i = 0; i < edid->extensions; i++) {
edid_ext = (void *)(edid + (i + 1));
if (edid_ext[0] == DISPLAYID_EXT)
break;
}
while (j < EDID_LENGTH) {
struct amd_vsdb_block *amd_vsdb = (struct amd_vsdb_block *)&edid_ext[j];
unsigned int ieeeId = (amd_vsdb->ieee_id[2] << 16) | (amd_vsdb->ieee_id[1] << 8) | (amd_vsdb->ieee_id[0]);
if (ieeeId == HDMI_AMD_VENDOR_SPECIFIC_DATA_BLOCK_IEEE_REGISTRATION_ID &&
amd_vsdb->version == HDMI_AMD_VENDOR_SPECIFIC_DATA_BLOCK_VERSION_3) {
vsdb_info->replay_mode = (amd_vsdb->feature_caps & AMD_VSDB_VERSION_3_FEATURECAP_REPLAYMODE) ? true : false;
vsdb_info->amd_vsdb_version = HDMI_AMD_VENDOR_SPECIFIC_DATA_BLOCK_VERSION_3;
DRM_DEBUG_KMS("Panel supports Replay Mode: %d\n", vsdb_info->replay_mode);
return true;
}
j++;
}
return false;
}
static int parse_hdmi_amd_vsdb(struct amdgpu_dm_connector *aconnector,
struct edid *edid, struct amdgpu_hdmi_vsdb_info *vsdb_info)
{
@@ -10625,6 +10660,14 @@ void amdgpu_dm_update_freesync_caps(struct drm_connector *connector,
freesync_capable = true;
}
}
parse_amd_vsdb(amdgpu_dm_connector, edid, &vsdb_info);
if (vsdb_info.replay_mode) {
amdgpu_dm_connector->vsdb_info.replay_mode = vsdb_info.replay_mode;
amdgpu_dm_connector->vsdb_info.amd_vsdb_version = vsdb_info.amd_vsdb_version;
amdgpu_dm_connector->as_type = ADAPTIVE_SYNC_TYPE_EDP;
}
} else if (edid && sink->sink_signal == SIGNAL_TYPE_HDMI_TYPE_A) {
i = parse_hdmi_amd_vsdb(amdgpu_dm_connector, edid, &vsdb_info);
if (i >= 0 && vsdb_info.freesync_supported) {