On Wed, Feb 12, 2025 at 09:57:37AM +0200, Jouni Högander wrote:
> Add drm_WARN_ON(use_dsb) into commit_pipe_{pre,post}_planes() and
> intel_pipe_update_{start,end}() as they are not supposed to get called on
> non-dsb updates.
>
> Signed-off-by: Jouni Högander <jouni.hogan...@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
> ---
> drivers/gpu/drm/i915/display/intel_crtc.c | 4 ++++
> drivers/gpu/drm/i915/display/intel_display.c | 6 +++++-
> 2 files changed, 9 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_crtc.c
> b/drivers/gpu/drm/i915/display/intel_crtc.c
> index 89785da93603..eb089d76ba2a 100644
> --- a/drivers/gpu/drm/i915/display/intel_crtc.c
> +++ b/drivers/gpu/drm/i915/display/intel_crtc.c
> @@ -522,6 +522,8 @@ void intel_pipe_update_start(struct intel_atomic_state
> *state,
> struct intel_vblank_evade_ctx evade;
> int scanline;
>
> + drm_WARN_ON(display->drm, new_crtc_state->use_dsb);
> +
> intel_psr_lock(new_crtc_state);
>
> if (new_crtc_state->do_async_flip) {
> @@ -660,6 +662,8 @@ void intel_pipe_update_end(struct intel_atomic_state
> *state,
> ktime_t end_vbl_time = ktime_get();
> struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
>
> + drm_WARN_ON(display->drm, new_crtc_state->use_dsb);
> +
> if (new_crtc_state->do_async_flip)
> goto out;
>
> diff --git a/drivers/gpu/drm/i915/display/intel_display.c
> b/drivers/gpu/drm/i915/display/intel_display.c
> index cab6852dd9c2..79b8d2ad3b9c 100644
> --- a/drivers/gpu/drm/i915/display/intel_display.c
> +++ b/drivers/gpu/drm/i915/display/intel_display.c
> @@ -7141,11 +7141,13 @@ static void commit_pipe_pre_planes(struct
> intel_atomic_state *state,
> intel_atomic_get_new_crtc_state(state, crtc);
> bool modeset = intel_crtc_needs_modeset(new_crtc_state);
>
> + drm_WARN_ON(&dev_priv->drm, new_crtc_state->use_dsb);
> +
> /*
> * During modesets pipe configuration was programmed as the
> * CRTC was enabled.
> */
> - if (!modeset && !new_crtc_state->use_dsb) {
> + if (!modeset) {
> if (intel_crtc_needs_color_update(new_crtc_state))
> intel_color_commit_arm(NULL, new_crtc_state);
>
> @@ -7168,6 +7170,8 @@ static void commit_pipe_post_planes(struct
> intel_atomic_state *state,
> const struct intel_crtc_state *new_crtc_state =
> intel_atomic_get_new_crtc_state(state, crtc);
>
> + drm_WARN_ON(&dev_priv->drm, new_crtc_state->use_dsb);
> +
> /*
> * Disable the scaler(s) after the plane(s) so that we don't
> * get a catastrophic underrun even if the two operations
> --
> 2.43.0
--
Ville Syrjälä
Intel
