From: Radhakrishna Sripada Date: Tue, 22 May 2018 00:25:51 +0000 (-0700) Subject: drm/i915/icl: Add 10-bit support for hdmi X-Git-Tag: v4.19~298^2~42^2~1 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=cd9e11a8bf259550577e2df7163d43a8a5655739;p=platform%2Fkernel%2Flinux-rpi.git drm/i915/icl: Add 10-bit support for hdmi Starting Icelake silicon supports 10-bpc hdmi to support certain media workloads. Currently hdmi supports 8 and 12 bpc. Plumbed in support for 10 bit hdmi. Cc: James Ausmus Cc: Jani Nikula Cc: Paulo Zanoni Cc: Manasi Navare Cc: Rodrigo Vivi Cc: Ville Syrjälä Reviewed-by: Ville Syrjälä Signed-off-by: Radhakrishna Sripada Signed-off-by: Paulo Zanoni Link: https://patchwork.freedesktop.org/patch/msgid/20180522002558.29262-18-paulo.r.zanoni@intel.com --- diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c index 8398d4b..98ad431 100644 --- a/drivers/gpu/drm/i915/intel_hdmi.c +++ b/drivers/gpu/drm/i915/intel_hdmi.c @@ -1566,14 +1566,23 @@ intel_hdmi_mode_valid(struct drm_connector *connector, /* check if we can do 8bpc */ status = hdmi_port_clock_valid(hdmi, clock, true, force_dvi); - /* if we can't do 8bpc we may still be able to do 12bpc */ - if (!HAS_GMCH_DISPLAY(dev_priv) && status != MODE_OK && hdmi->has_hdmi_sink && !force_dvi) - status = hdmi_port_clock_valid(hdmi, clock * 3 / 2, true, force_dvi); + if (hdmi->has_hdmi_sink && !force_dvi) { + /* if we can't do 8bpc we may still be able to do 12bpc */ + if (status != MODE_OK && !HAS_GMCH_DISPLAY(dev_priv)) + status = hdmi_port_clock_valid(hdmi, clock * 3 / 2, + true, force_dvi); + + /* if we can't do 8,12bpc we may still be able to do 10bpc */ + if (status != MODE_OK && INTEL_GEN(dev_priv) >= 11) + status = hdmi_port_clock_valid(hdmi, clock * 5 / 4, + true, force_dvi); + } return status; } -static bool hdmi_12bpc_possible(const struct intel_crtc_state *crtc_state) +static bool hdmi_deep_color_possible(const struct intel_crtc_state *crtc_state, + int bpc) { struct drm_i915_private *dev_priv = to_i915(crtc_state->base.crtc->dev); @@ -1585,6 +1594,9 @@ static bool hdmi_12bpc_possible(const struct intel_crtc_state *crtc_state) if (HAS_GMCH_DISPLAY(dev_priv)) return false; + if (bpc == 10 && INTEL_GEN(dev_priv) < 11) + return false; + if (crtc_state->pipe_bpp <= 8*3) return false; @@ -1592,7 +1604,7 @@ static bool hdmi_12bpc_possible(const struct intel_crtc_state *crtc_state) return false; /* - * HDMI 12bpc affects the clocks, so it's only possible + * HDMI deep color affects the clocks, so it's only possible * when not cloning with other encoder types. */ if (crtc_state->output_types != 1 << INTEL_OUTPUT_HDMI) @@ -1607,16 +1619,24 @@ static bool hdmi_12bpc_possible(const struct intel_crtc_state *crtc_state) if (crtc_state->ycbcr420) { const struct drm_hdmi_info *hdmi = &info->hdmi; - if (!(hdmi->y420_dc_modes & DRM_EDID_YCBCR420_DC_36)) + if (bpc == 12 && !(hdmi->y420_dc_modes & + DRM_EDID_YCBCR420_DC_36)) + return false; + else if (bpc == 10 && !(hdmi->y420_dc_modes & + DRM_EDID_YCBCR420_DC_30)) return false; } else { - if (!(info->edid_hdmi_dc_modes & DRM_EDID_HDMI_DC_36)) + if (bpc == 12 && !(info->edid_hdmi_dc_modes & + DRM_EDID_HDMI_DC_36)) + return false; + else if (bpc == 10 && !(info->edid_hdmi_dc_modes & + DRM_EDID_HDMI_DC_30)) return false; } } /* Display WA #1139: glk */ - if (IS_GLK_REVID(dev_priv, 0, GLK_REVID_A1) && + if (bpc == 12 && IS_GLK_REVID(dev_priv, 0, GLK_REVID_A1) && crtc_state->base.adjusted_mode.htotal > 5460) return false; @@ -1626,7 +1646,8 @@ static bool hdmi_12bpc_possible(const struct intel_crtc_state *crtc_state) static bool intel_hdmi_ycbcr420_config(struct drm_connector *connector, struct intel_crtc_state *config, - int *clock_12bpc, int *clock_8bpc) + int *clock_12bpc, int *clock_10bpc, + int *clock_8bpc) { struct intel_crtc *intel_crtc = to_intel_crtc(config->base.crtc); @@ -1638,6 +1659,7 @@ intel_hdmi_ycbcr420_config(struct drm_connector *connector, /* YCBCR420 TMDS rate requirement is half the pixel clock */ config->port_clock /= 2; *clock_12bpc /= 2; + *clock_10bpc /= 2; *clock_8bpc /= 2; config->ycbcr420 = true; @@ -1665,6 +1687,7 @@ bool intel_hdmi_compute_config(struct intel_encoder *encoder, struct intel_digital_connector_state *intel_conn_state = to_intel_digital_connector_state(conn_state); int clock_8bpc = pipe_config->base.adjusted_mode.crtc_clock; + int clock_10bpc = clock_8bpc * 5 / 4; int clock_12bpc = clock_8bpc * 3 / 2; int desired_bpp; bool force_dvi = intel_conn_state->force_audio == HDMI_AUDIO_OFF_DVI; @@ -1691,12 +1714,14 @@ bool intel_hdmi_compute_config(struct intel_encoder *encoder, if (adjusted_mode->flags & DRM_MODE_FLAG_DBLCLK) { pipe_config->pixel_multiplier = 2; clock_8bpc *= 2; + clock_10bpc *= 2; clock_12bpc *= 2; } if (drm_mode_is_420_only(&connector->display_info, adjusted_mode)) { if (!intel_hdmi_ycbcr420_config(connector, pipe_config, - &clock_12bpc, &clock_8bpc)) { + &clock_12bpc, &clock_10bpc, + &clock_8bpc)) { DRM_ERROR("Can't support YCBCR420 output\n"); return false; } @@ -1714,18 +1739,25 @@ bool intel_hdmi_compute_config(struct intel_encoder *encoder, } /* - * HDMI is either 12 or 8, so if the display lets 10bpc sneak - * through, clamp it down. Note that g4x/vlv don't support 12bpc hdmi - * outputs. We also need to check that the higher clock still fits - * within limits. + * Note that g4x/vlv don't support 12bpc hdmi outputs. We also need + * to check that the higher clock still fits within limits. */ - if (hdmi_12bpc_possible(pipe_config) && - hdmi_port_clock_valid(intel_hdmi, clock_12bpc, true, force_dvi) == MODE_OK) { + if (hdmi_deep_color_possible(pipe_config, 12) && + hdmi_port_clock_valid(intel_hdmi, clock_12bpc, + true, force_dvi) == MODE_OK) { DRM_DEBUG_KMS("picking bpc to 12 for HDMI output\n"); desired_bpp = 12*3; /* Need to adjust the port link by 1.5x for 12bpc. */ pipe_config->port_clock = clock_12bpc; + } else if (hdmi_deep_color_possible(pipe_config, 10) && + hdmi_port_clock_valid(intel_hdmi, clock_10bpc, + true, force_dvi) == MODE_OK) { + DRM_DEBUG_KMS("picking bpc to 10 for HDMI output\n"); + desired_bpp = 10 * 3; + + /* Need to adjust the port link by 1.25x for 10bpc. */ + pipe_config->port_clock = clock_10bpc; } else { DRM_DEBUG_KMS("picking bpc to 8 for HDMI output\n"); desired_bpp = 8*3;