diff options
| author | Shobhit Kumar <shobhit.kumar@intel.com> | 2013-07-11 18:44:56 -0300 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2013-07-18 09:59:26 +0200 |
| commit | 2293bb5c0383f522ac659946ccfadb0e6d2f03c5 (patch) | |
| tree | a7201285495400ec2a18dba8e8cfe5a067fc6c7a /drivers/gpu/drm/i915/intel_dp.c | |
| parent | 52604b1ffabac61eb07cce711f18e18ac74fbeae (diff) | |
| download | linux-2293bb5c0383f522ac659946ccfadb0e6d2f03c5.tar.bz2 | |
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>
Diffstat (limited to 'drivers/gpu/drm/i915/intel_dp.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_dp.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 11eb697dec01..fe206a4a0f9e 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -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 */ |