From: Ville Syrjälä Date: Wed, 18 Jan 2023 16:30:30 +0000 (+0200) Subject: drm/i915/dsb: Split intel_dsb_wait() from intel_dsb_commit() X-Git-Tag: v6.6.7~1918^2~17^2~589 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=4b284831c6f3656627958bced181215e7b9fd322;p=platform%2Fkernel%2Flinux-starfive.git drm/i915/dsb: Split intel_dsb_wait() from intel_dsb_commit() Starting the DSB execution vs. waiting for it stop are two totally different things. Split intel_dsb_wait() from intel_dsb_commit() so that we can eventually allow the DSB to execute asynchronously. Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20230118163040.29808-4-ville.syrjala@linux.intel.com Reviewed-by: Animesh Manna --- diff --git a/drivers/gpu/drm/i915/display/intel_color.c b/drivers/gpu/drm/i915/display/intel_color.c index 256f8ce..c5bf801 100644 --- a/drivers/gpu/drm/i915/display/intel_color.c +++ b/drivers/gpu/drm/i915/display/intel_color.c @@ -1256,8 +1256,10 @@ static void icl_load_luts(const struct intel_crtc_state *crtc_state) break; } - if (crtc_state->dsb) + if (crtc_state->dsb) { intel_dsb_commit(crtc_state->dsb); + intel_dsb_wait(crtc_state->dsb); + } } static u32 chv_cgm_degamma_ldw(const struct drm_color_lut *color) diff --git a/drivers/gpu/drm/i915/display/intel_dsb.c b/drivers/gpu/drm/i915/display/intel_dsb.c index f41146f..0b2faa3 100644 --- a/drivers/gpu/drm/i915/display/intel_dsb.c +++ b/drivers/gpu/drm/i915/display/intel_dsb.c @@ -235,7 +235,7 @@ void intel_dsb_commit(struct intel_dsb *dsb) if (is_dsb_busy(dev_priv, pipe, dsb->id)) { drm_err(&dev_priv->drm, "[CRTC:%d:%s] DSB %d is busy\n", crtc->base.base.id, crtc->base.name, dsb->id); - goto reset; + return; } intel_de_write(dev_priv, DSB_CTRL(pipe, dsb->id), @@ -249,13 +249,20 @@ void intel_dsb_commit(struct intel_dsb *dsb) "DSB execution started - head 0x%x, tail 0x%x\n", i915_ggtt_offset(dsb->vma), i915_ggtt_offset(dsb->vma) + tail); +} + +void intel_dsb_wait(struct intel_dsb *dsb) +{ + struct intel_crtc *crtc = dsb->crtc; + struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); + enum pipe pipe = crtc->pipe; if (wait_for(!is_dsb_busy(dev_priv, pipe, dsb->id), 1)) drm_err(&dev_priv->drm, "[CRTC:%d:%s] DSB %d timed out waiting for idle\n", crtc->base.base.id, crtc->base.name, dsb->id); -reset: + /* Attempt to reset it */ dsb->free_pos = 0; dsb->ins_start_offset = 0; intel_de_write(dev_priv, DSB_CTRL(pipe, dsb->id), 0); diff --git a/drivers/gpu/drm/i915/display/intel_dsb.h b/drivers/gpu/drm/i915/display/intel_dsb.h index 05c221b..7999199 100644 --- a/drivers/gpu/drm/i915/display/intel_dsb.h +++ b/drivers/gpu/drm/i915/display/intel_dsb.h @@ -19,5 +19,6 @@ void intel_dsb_cleanup(struct intel_dsb *dsb); void intel_dsb_reg_write(struct intel_dsb *dsb, i915_reg_t reg, u32 val); void intel_dsb_commit(struct intel_dsb *dsb); +void intel_dsb_wait(struct intel_dsb *dsb); #endif