From: Ville Syrjälä <[email protected]> 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 <[email protected]> --- 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
