[Intel-gfx] [PATCH 08/39] drm/i915/tgl: Change PSR2 transcoder restriction

[Lucas De Marchi]

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

Tiger Lake has eDP-capable transcoders rather than a transcoder
dedicated to eDP. Transcoder A is the one where we have PSR2.
Actually transcoder B also supports PSR2 but only with software
tracking that is not implemented.

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>
Signed-off-by: Lucas De Marchi <lucas.demarchi at intel.com>
---
 drivers/gpu/drm/i915/display/intel_psr.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index 01070eb67571..1d36d7be015d 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -511,12 +511,19 @@ static bool intel_psr2_config_valid(struct intel_dp *intel_dp,
 	int crtc_hdisplay = crtc_state->base.adjusted_mode.crtc_hdisplay;
 	int crtc_vdisplay = crtc_state->base.adjusted_mode.crtc_vdisplay;
 	int psr_max_h = 0, psr_max_v = 0;
+	enum transcoder supported;
 
 	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");
+	/*
+	 * TODO: PSR2 is also supported in TRANSCODER_B on TGL+ but it requires
+	 * software tracking
+	 */
+	supported = INTEL_GEN(dev_priv) >= 12 ? TRANSCODER_A : TRANSCODER_EDP;
+	if (crtc_state->cpu_transcoder != supported) {
+		DRM_DEBUG_KMS("PSR2 not supported in transcoder %s\n",
+			      transcoder_name(supported));
 		return false;
 	}
 
-- 
2.21.0