[PATCH 2/2] drm/i915/dsi: Don't use SET_CONTEXT_LATENCY with DSI transcoders

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

ADL DSI transcoders do not have the new SET_CONTEXT_LATENCY
register. Instead they supposedly use the older TGL VBLANK_START
based method of defining the vblank delay.

Completely untested due to lack of suitable hardware.

Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_display.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 00ac65a14029..e9c7e9b8957a 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -2617,7 +2617,7 @@ static void intel_set_transcoder_timings(const struct intel_crtc_state *crtc_sta
 	 * VBLANK_START no longer works on ADL+, instead we must use
 	 * TRANS_SET_CONTEXT_LATENCY to configure the pipe vblank start.
 	 */
-	if (DISPLAY_VER(dev_priv) >= 13) {
+	if (DISPLAY_VER(dev_priv) >= 13 && !transcoder_is_dsi(cpu_transcoder)) {
 		intel_de_write(dev_priv, TRANS_SET_CONTEXT_LATENCY(cpu_transcoder),
 			       crtc_vblank_start - crtc_vdisplay);
 
-- 
2.43.0