diff options
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_dp_mst.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp_mst.c | 40 |
1 files changed, 30 insertions, 10 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c index 15541932b809..eeaedd979354 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_mst.c +++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c @@ -89,25 +89,19 @@ static int intel_dp_mst_max_dpt_bpp(const struct intel_crtc_state *crtc_state, static int intel_dp_mst_bw_overhead(const struct intel_crtc_state *crtc_state, const struct intel_connector *connector, - bool ssc, bool dsc, int bpp_x16) + bool ssc, int dsc_slice_count, int bpp_x16) { const struct drm_display_mode *adjusted_mode = &crtc_state->hw.adjusted_mode; unsigned long flags = DRM_DP_BW_OVERHEAD_MST; - int dsc_slice_count = 0; int overhead; flags |= intel_dp_is_uhbr(crtc_state) ? DRM_DP_BW_OVERHEAD_UHBR : 0; flags |= ssc ? DRM_DP_BW_OVERHEAD_SSC_REF_CLK : 0; flags |= crtc_state->fec_enable ? DRM_DP_BW_OVERHEAD_FEC : 0; - if (dsc) { + if (dsc_slice_count) flags |= DRM_DP_BW_OVERHEAD_DSC; - dsc_slice_count = intel_dp_dsc_get_slice_count(connector, - adjusted_mode->clock, - adjusted_mode->hdisplay, - crtc_state->joiner_pipes); - } overhead = drm_dp_bw_overhead(crtc_state->lane_count, adjusted_mode->hdisplay, @@ -153,6 +147,19 @@ static int intel_dp_mst_calc_pbn(int pixel_clock, int bpp_x16, int bw_overhead) return DIV_ROUND_UP(effective_data_rate * 64, 54 * 1000); } +static int intel_dp_mst_dsc_get_slice_count(const struct intel_connector *connector, + const struct intel_crtc_state *crtc_state) +{ + const struct drm_display_mode *adjusted_mode = + &crtc_state->hw.adjusted_mode; + int num_joined_pipes = crtc_state->joiner_pipes; + + return intel_dp_dsc_get_slice_count(connector, + adjusted_mode->clock, + adjusted_mode->hdisplay, + num_joined_pipes); +} + static int intel_dp_mst_find_vcpi_slots_for_bpp(struct intel_encoder *encoder, struct intel_crtc_state *crtc_state, int max_bpp, @@ -172,6 +179,7 @@ static int intel_dp_mst_find_vcpi_slots_for_bpp(struct intel_encoder *encoder, const struct drm_display_mode *adjusted_mode = &crtc_state->hw.adjusted_mode; int bpp, slots = -EINVAL; + int dsc_slice_count = 0; int max_dpt_bpp; int ret = 0; @@ -203,6 +211,15 @@ static int intel_dp_mst_find_vcpi_slots_for_bpp(struct intel_encoder *encoder, drm_dbg_kms(&i915->drm, "Looking for slots in range min bpp %d max bpp %d\n", min_bpp, max_bpp); + if (dsc) { + dsc_slice_count = intel_dp_mst_dsc_get_slice_count(connector, crtc_state); + if (!dsc_slice_count) { + drm_dbg_kms(&i915->drm, "Can't get valid DSC slice count\n"); + + return -ENOSPC; + } + } + for (bpp = max_bpp; bpp >= min_bpp; bpp -= step) { int local_bw_overhead; int remote_bw_overhead; @@ -216,9 +233,9 @@ static int intel_dp_mst_find_vcpi_slots_for_bpp(struct intel_encoder *encoder, intel_dp_output_bpp(crtc_state->output_format, bpp)); local_bw_overhead = intel_dp_mst_bw_overhead(crtc_state, connector, - false, dsc, link_bpp_x16); + false, dsc_slice_count, link_bpp_x16); remote_bw_overhead = intel_dp_mst_bw_overhead(crtc_state, connector, - true, dsc, link_bpp_x16); + true, dsc_slice_count, link_bpp_x16); intel_dp_mst_compute_m_n(crtc_state, connector, local_bw_overhead, @@ -449,6 +466,9 @@ hblank_expansion_quirk_needs_dsc(const struct intel_connector *connector, if (mode_hblank_period_ns(adjusted_mode) > hblank_limit) return false; + if (!intel_dp_mst_dsc_get_slice_count(connector, crtc_state)) + return false; + return true; } |