On Tue, Oct 27, 2020 at 10:39:48PM +0200, Ville Syrjala wrote: > From: Ville Syrjälä <[email protected]> > > skl_ddb_get_pipe_allocation_limits() doesn't care how the weights > for distributing the ddb are caclculated for each pipe. Put that > calculation into a separate function so that such mundane details > are hidden from view. > > Cc: Stanislav Lisovskiy <[email protected]> > Signed-off-by: Ville Syrjälä <[email protected]>
Reviewed-by: Stanislav Lisovskiy <[email protected]> > --- > drivers/gpu/drm/i915/intel_pm.c | 46 ++++++++++++++++++++------------- > 1 file changed, 28 insertions(+), 18 deletions(-) > > diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c > index 0ef01a01ef8d..d14cdedc4ac3 100644 > --- a/drivers/gpu/drm/i915/intel_pm.c > +++ b/drivers/gpu/drm/i915/intel_pm.c > @@ -4084,6 +4084,25 @@ u32 skl_ddb_dbuf_slice_mask(struct drm_i915_private > *dev_priv, > return slice_mask; > } > > +static unsigned int intel_crtc_ddb_weight(const struct intel_crtc_state > *crtc_state) > +{ > + const struct drm_display_mode *adjusted_mode = > + &crtc_state->hw.adjusted_mode; > + int hdisplay, vdisplay; > + > + if (!crtc_state->hw.active) > + return 0; > + > + /* > + * Watermark/ddb requirement highly depends upon width of the > + * framebuffer, So instead of allocating DDB equally among pipes > + * distribute DDB based on resolution/width of the display. > + */ > + drm_mode_get_hv_timing(adjusted_mode, &hdisplay, &vdisplay); > + > + return hdisplay; > +} > + > static u8 skl_compute_dbuf_slices(const struct intel_crtc_state *crtc_state, > u8 active_pipes); > > @@ -4098,7 +4117,7 @@ skl_ddb_get_pipe_allocation_limits(struct > drm_i915_private *dev_priv, > struct intel_atomic_state *intel_state = to_intel_atomic_state(state); > struct drm_crtc *for_crtc = crtc_state->uapi.crtc; > const struct intel_crtc *crtc; > - u32 pipe_width = 0, total_width_in_range = 0, > width_before_pipe_in_range = 0; > + unsigned int pipe_weight = 0, total_weight = 0, weight_before_pipe = 0; > enum pipe for_pipe = to_intel_crtc(for_crtc)->pipe; > struct intel_dbuf_state *new_dbuf_state = > intel_atomic_get_new_dbuf_state(intel_state); > @@ -4167,18 +4186,11 @@ skl_ddb_get_pipe_allocation_limits(struct > drm_i915_private *dev_priv, > */ > ddb_range_size = hweight8(dbuf_slice_mask) * slice_size; > > - /* > - * Watermark/ddb requirement highly depends upon width of the > - * framebuffer, So instead of allocating DDB equally among pipes > - * distribute DDB based on resolution/width of the display. > - */ > total_slice_mask = dbuf_slice_mask; > for_each_new_intel_crtc_in_state(intel_state, crtc, crtc_state, i) { > - const struct drm_display_mode *adjusted_mode = > - &crtc_state->hw.adjusted_mode; > enum pipe pipe = crtc->pipe; > - int hdisplay, vdisplay; > - u32 pipe_dbuf_slice_mask; > + unsigned int weight; > + u8 pipe_dbuf_slice_mask; > > if (!crtc_state->hw.active) > continue; > @@ -4205,14 +4217,13 @@ skl_ddb_get_pipe_allocation_limits(struct > drm_i915_private *dev_priv, > if (dbuf_slice_mask != pipe_dbuf_slice_mask) > continue; > > - drm_mode_get_hv_timing(adjusted_mode, &hdisplay, &vdisplay); > - > - total_width_in_range += hdisplay; > + weight = intel_crtc_ddb_weight(crtc_state); > + total_weight += weight; > > if (pipe < for_pipe) > - width_before_pipe_in_range += hdisplay; > + weight_before_pipe += weight; > else if (pipe == for_pipe) > - pipe_width = hdisplay; > + pipe_weight = weight; > } > > /* > @@ -4227,9 +4238,8 @@ skl_ddb_get_pipe_allocation_limits(struct > drm_i915_private *dev_priv, > return ret; > } > > - start = ddb_range_size * width_before_pipe_in_range / > total_width_in_range; > - end = ddb_range_size * > - (width_before_pipe_in_range + pipe_width) / > total_width_in_range; > + start = ddb_range_size * weight_before_pipe / total_weight; > + end = ddb_range_size * (weight_before_pipe + pipe_weight) / > total_weight; > > alloc->start = offset + start; > alloc->end = offset + end; > -- > 2.26.2 > _______________________________________________ Intel-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/intel-gfx
