[Intel-gfx] [PATCH v7 4/4] drm/i915: Add transcoder restriction to PSR2

[José Roberto de Souza]

According to PSR2_CTL definition on BSpec there is only one instance
of PSR2_CTL also ICL display overview state that PSR2 is only
supported in EDP transcoder, so now that is possible to have PSR in
any transcoder lets add this hardware restriction.

BSpec: 7713
BSpec: 20584
Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan at intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
Signed-off-by: José Roberto de Souza <jose.souza at intel.com>
---
 drivers/gpu/drm/i915/display/intel_psr.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index f06b4a0b9e26..526990767c52 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -545,6 +545,11 @@ static bool intel_psr2_config_valid(struct intel_dp *intel_dp,
 	if (!dev_priv->psr.sink_psr2_support)
 		return false;
 
+	if (crtc_state->cpu_transcoder != TRANSCODER_EDP) {
+		DRM_DEBUG_KMS("PSR2 is only supported in EDP transcoder\n");
+		return false;
+	}
+
 	/*
 	 * DSC and PSR2 cannot be enabled simultaneously. If a requested
 	 * resolution requires DSC to be enabled, priority is given to DSC
-- 
2.22.0