openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

drm/i915: Read the EDP DPCD and PSR Capability 

v2: reuse of just created is_edp_psr and put it at right place.
v3: move is_edp_psr above intel_edp_disable
v4: remove parentheses. Noticed by Paulo.

Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Shobhit Kumar <shobhit.kumar@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Shobhit Kumar 2013-07-11 18:44:56 -03:00 committed by Daniel Vetter
parent 52604b1ffa
commit 2293bb5c03
2 changed files with 14 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/gpu/drm/i915/intel_dp.c
View File

@ -1364,6 +1364,12 @@ static void intel_dp_get_config(struct intel_encoder *encoder,
}
}
static bool is_edp_psr(struct intel_dp *intel_dp)
{
return is_edp(intel_dp) &&
intel_dp->psr_dpcd[0] & DP_PSR_IS_SUPPORTED;
}
static void intel_disable_dp(struct intel_encoder *encoder)
{
struct intel_dp *intel_dp = enc_to_intel_dp(&encoder->base);
@ -2277,6 +2283,13 @@ intel_dp_get_dpcd(struct intel_dp *intel_dp)
if (intel_dp->dpcd[DP_DPCD_REV] == 0)
return false; /* DPCD not present */
/* Check if the panel supports PSR */
memset(intel_dp->psr_dpcd, 0, sizeof(intel_dp->psr_dpcd));
intel_dp_aux_native_read_retry(intel_dp, DP_PSR_SUPPORT,
intel_dp->psr_dpcd,
sizeof(intel_dp->psr_dpcd));
if (is_edp_psr(intel_dp))
DRM_DEBUG_KMS("Detected EDP PSR Panel.\n");
if (!(intel_dp->dpcd[DP_DOWNSTREAMPORT_PRESENT] &
DP_DWN_STRM_PORT_PRESENT))
return true; /* native DP sink */

1
drivers/gpu/drm/i915/intel_drv.h
View File

@ -487,6 +487,7 @@ struct intel_dp {
uint8_t link_bw;
uint8_t lane_count;
uint8_t dpcd[DP_RECEIVER_CAP_SIZE];
uint8_t psr_dpcd[EDP_PSR_RECEIVER_CAP_SIZE];
uint8_t downstream_ports[DP_MAX_DOWNSTREAM_PORTS];
struct i2c_adapter adapter;
struct i2c_algo_dp_aux_data algo;