From: Ville Syrjälä <[email protected]> On TGL VBLANK.VBLANK_START was the mechanism by which we can delay the pipe's internal vblank in relation to the transcoder's vblank. On ADL+ that no longer does anything. Instead we must now use the new TRANS_SET_CONTEXT_LATENCY register. Program it accordingly.
And since VBLANK.VBLANK_START is no longer used by the hardware on ADL+ let's just zero it out to make it stand out in register dumps. Seeing the zeroed value should hopefully remind people to check the other register instead. Signed-off-by: Ville Syrjälä <[email protected]> --- drivers/gpu/drm/i915/display/intel_display.c | 28 +++++++++++++++++--- 1 file changed, 25 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c index 1d92a789baab..92306246e907 100644 --- a/drivers/gpu/drm/i915/display/intel_display.c +++ b/drivers/gpu/drm/i915/display/intel_display.c @@ -2821,12 +2821,14 @@ static void intel_set_transcoder_timings(const struct intel_crtc_state *crtc_sta enum pipe pipe = crtc->pipe; enum transcoder cpu_transcoder = crtc_state->cpu_transcoder; const struct drm_display_mode *adjusted_mode = &crtc_state->hw.adjusted_mode; - u32 crtc_vtotal, crtc_vblank_end; + u32 crtc_vdisplay, crtc_vtotal, crtc_vblank_start, crtc_vblank_end; int vsyncshift = 0; /* We need to be careful not to changed the adjusted mode, for otherwise * the hw state checker will get angry at the mismatch. */ + crtc_vdisplay = adjusted_mode->crtc_vdisplay; crtc_vtotal = adjusted_mode->crtc_vtotal; + crtc_vblank_start = adjusted_mode->crtc_vblank_start; crtc_vblank_end = adjusted_mode->crtc_vblank_end; if (adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE) { @@ -2843,6 +2845,21 @@ static void intel_set_transcoder_timings(const struct intel_crtc_state *crtc_sta vsyncshift += adjusted_mode->crtc_htotal; } + /* + * 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) { + intel_de_write(dev_priv, TRANS_SET_CONTEXT_LATENCY(cpu_transcoder), + crtc_vblank_start - crtc_vdisplay); + + /* + * VBLANK_START not used by hw, just clear it + * to make it stand out in register dumps. + */ + crtc_vblank_start = 1; + } + if (DISPLAY_VER(dev_priv) > 3) intel_de_write(dev_priv, TRANS_VSYNCSHIFT(cpu_transcoder), vsyncshift); @@ -2858,10 +2875,10 @@ static void intel_set_transcoder_timings(const struct intel_crtc_state *crtc_sta HSYNC_END(adjusted_mode->crtc_hsync_end - 1)); intel_de_write(dev_priv, TRANS_VTOTAL(cpu_transcoder), - VACTIVE(adjusted_mode->crtc_vdisplay - 1) | + VACTIVE(crtc_vdisplay - 1) | VTOTAL(crtc_vtotal - 1)); intel_de_write(dev_priv, TRANS_VBLANK(cpu_transcoder), - VBLANK_START(adjusted_mode->crtc_vblank_start - 1) | + VBLANK_START(crtc_vblank_start - 1) | VBLANK_END(crtc_vblank_end - 1)); intel_de_write(dev_priv, TRANS_VSYNC(cpu_transcoder), VSYNC_START(adjusted_mode->crtc_vsync_start - 1) | @@ -2949,6 +2966,11 @@ static void intel_get_transcoder_timings(struct intel_crtc *crtc, adjusted_mode->crtc_vtotal += 1; adjusted_mode->crtc_vblank_end += 1; } + + if (DISPLAY_VER(dev_priv) >= 13 && !transcoder_is_dsi(cpu_transcoder)) + adjusted_mode->crtc_vblank_start = + adjusted_mode->crtc_vdisplay + + intel_de_read(dev_priv, TRANS_SET_CONTEXT_LATENCY(cpu_transcoder)); } static void intel_bigjoiner_adjust_pipe_src(struct intel_crtc_state *crtc_state) -- 2.39.1
