diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index bf1fed201c66..1f690b8f31d2 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -2803,33 +2803,24 @@ bool intel_dp_joiner_needs_dsc(struct intel_display *display, } static int -intel_dp_compute_link_config(struct intel_encoder *encoder, - struct intel_crtc_state *pipe_config, - struct drm_connector_state *conn_state, - bool respect_downstream_limits) +intel_dp_compute_link_for_joined_pipes(struct intel_encoder *encoder, + struct intel_crtc_state *pipe_config, + struct drm_connector_state *conn_state, + bool respect_downstream_limits) { struct intel_display *display = to_intel_display(encoder); - struct intel_crtc *crtc = to_intel_crtc(pipe_config->uapi.crtc); + int num_joined_pipes = intel_crtc_num_joined_pipes(pipe_config); struct intel_connector *connector = to_intel_connector(conn_state->connector); const struct drm_display_mode *adjusted_mode = &pipe_config->hw.adjusted_mode; struct intel_dp *intel_dp = enc_to_intel_dp(encoder); + int max_dotclk = display->cdclk.max_dotclk_freq; struct link_config_limits limits; bool dsc_needed, joiner_needs_dsc; - int num_joined_pipes; int ret = 0; - if (pipe_config->fec_enable && - !intel_dp_supports_fec(intel_dp, connector, pipe_config)) - return -EINVAL; - - num_joined_pipes = intel_dp_num_joined_pipes(intel_dp, connector, - adjusted_mode->crtc_hdisplay, - adjusted_mode->crtc_clock); - if (num_joined_pipes > 1) - pipe_config->joiner_pipes = GENMASK(crtc->pipe + num_joined_pipes - 1, crtc->pipe); - + max_dotclk *= num_joined_pipes; joiner_needs_dsc = intel_dp_joiner_needs_dsc(display, num_joined_pipes); dsc_needed = joiner_needs_dsc || intel_dp->force_dsc_en || @@ -2852,7 +2843,8 @@ intel_dp_compute_link_config(struct intel_encoder *encoder, fxp_q4_from_int(pipe_config->pipe_bpp), fxp_q4_from_int(pipe_config->pipe_bpp), 0, false); - if (ret) + + if (ret || adjusted_mode->crtc_clock > max_dotclk) dsc_needed = true; } @@ -2877,6 +2869,9 @@ intel_dp_compute_link_config(struct intel_encoder *encoder, conn_state, &limits, 64); if (ret < 0) return ret; + + if (adjusted_mode->crtc_clock > max_dotclk) + return -EINVAL; } drm_dbg_kms(display->drm, @@ -2892,6 +2887,67 @@ intel_dp_compute_link_config(struct intel_encoder *encoder, return 0; } +static int +intel_dp_compute_link_config(struct intel_encoder *encoder, + struct intel_crtc_state *crtc_state, + struct drm_connector_state *conn_state, + bool respect_downstream_limits) +{ + struct intel_display *display = to_intel_display(encoder); + struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc); + struct intel_connector *connector = + to_intel_connector(conn_state->connector); + const struct drm_display_mode *adjusted_mode = + &crtc_state->hw.adjusted_mode; + struct intel_dp *intel_dp = enc_to_intel_dp(encoder); + int num_joined_pipes; + int ret = -EINVAL; + + if (crtc_state->fec_enable && + !intel_dp_supports_fec(intel_dp, connector, crtc_state)) + return -EINVAL; + + for (num_joined_pipes = 1; num_joined_pipes <= I915_MAX_PIPES; num_joined_pipes++) { + if (connector->force_joined_pipes && + num_joined_pipes != connector->force_joined_pipes) + continue; + + if (!intel_dp_can_join(display, num_joined_pipes)) + continue; + + if (adjusted_mode->hdisplay > + num_joined_pipes * intel_dp_max_hdisplay_per_pipe(display)) + continue; + + /* + * NOTE: + * The crtc_state->joiner_pipes should have been set at the end + * only if all the conditions are met. However that would mean + * that num_joined_pipes is passed around to all helpers and + * make them use it instead of using crtc_state->joiner_pipes + * directly or indirectly (via intel_crtc_num_joined_pipes()). + * + * For now, setting crtc_state->joiner_pipes to the candidate + * value to avoid the above churn and resetting it to 0, in case + * no joiner candidate is found to be suitable for the given + * configuration. + */ + if (num_joined_pipes > 1) + crtc_state->joiner_pipes = GENMASK(crtc->pipe + num_joined_pipes - 1, + crtc->pipe); + + ret = intel_dp_compute_link_for_joined_pipes(encoder, crtc_state, conn_state, + respect_downstream_limits); + if (ret == 0) + break; + } + + if (ret < 0) + crtc_state->joiner_pipes = 0; + + return ret; +} + bool intel_dp_limited_color_range(const struct intel_crtc_state *crtc_state, const struct drm_connector_state *conn_state) {