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authorShobhit Kumar <shobhit.kumar@intel.com>2013-07-11 18:44:56 -0300
committerDaniel Vetter <daniel.vetter@ffwll.ch>2013-07-18 09:59:26 +0200
commit2293bb5c0383f522ac659946ccfadb0e6d2f03c5 (patch)
treea7201285495400ec2a18dba8e8cfe5a067fc6c7a /drivers/gpu/drm/i915/intel_dp.c
parent52604b1ffabac61eb07cce711f18e18ac74fbeae (diff)
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.c13
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 11eb697dec0..fe206a4a0f9 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 */