[PATCH 03/39] drm/i915: Add transcoder restriction to PSR2

[Lucas De Marchi <lucas.demarchi@intel.com>]

From: José Roberto de Souza <jose.souza@intel.com>

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@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@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 795e25d45357..d4d2f1f272fe 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
-- 
2.21.0

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