From b22ca995ba1cbe7a04141450b78215e41c361ffa Mon Sep 17 00:00:00 2001 From: Shashank Sharma Date: Mon, 24 Jul 2017 19:19:32 +0530 Subject: [PATCH] drm/i915: prepare pipe for YCBCR420 output To get HDMI YCBCR420 output, the PIPEMISC register should be programmed to: - Generate YCBCR output (bit 11) - In case of YCBCR420 outputs, it should be programmed in full blend mode to use the scaler in 5x3 ratio (bits 26 and 27) This patch: - Adds definition of these bits. - Programs PIPEMISC for YCBCR420 outputs. - Adds readouts to compare HW and SW states. V2: rebase V3: rebase V4: rebase V5: added r-b from Ander V6: Handle only YCBCR420 outputs (ville) V7: rebase V8: Addressed review comments from Ville - Add readouts for state->ycbcr420 and 420 pixel_clock. - Handle warning due to mismatch in clock for ycbcr420 clock. - Rename PIPEMISC macros to match the Bspec. - Add a debug print stating if YCBCR 4:2:0 output enabled. Added r-b from Ville V9: Addressed review comments from Imre: - Add 420 mode clock adjustment in intel_hdmi_mode_valid to prevent 420_only modes getting rejected for high clock. - Add port clock adjustment for ycbcr420 modes in ddi_get_clock - Rename macros as per Ville's suggestion. - Remove unnecessary wl changes. V10: Added r-b from Imre V11: Fixed faulty dotclock handling, and addressed missing comment from previous set of review comments (Imre) V12: Fixed dotclock for 12bpc too, removed 420 check for GEN < 10 Cc: Ville Syrjala Cc: Ander Conselvan de Oliveira Cc: Daniel Vetter Cc: Imre Deak Reviewed-by: Ander Conselvan de Oliveira Reviewed-by: Ville Syrjala Reviewed-by: Imre Deak Signed-off-by: Shashank Sharma Signed-off-by: Imre Deak Link: https://patchwork.freedesktop.org/patch/msgid/1500904172-31717-1-git-send-email-shashank.sharma@intel.com Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_reg.h | 3 +++ drivers/gpu/drm/i915/intel_ddi.c | 3 +++ drivers/gpu/drm/i915/intel_display.c | 27 +++++++++++++++++++++++++++ drivers/gpu/drm/i915/intel_hdmi.c | 3 +++ 4 files changed, 36 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index c83f1095cb21..67be8eb57065 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -5252,6 +5252,9 @@ enum { #define _PIPE_MISC_A 0x70030 #define _PIPE_MISC_B 0x71030 +#define PIPEMISC_YUV420_ENABLE (1<<27) +#define PIPEMISC_YUV420_MODE_FULL_BLEND (1<<26) +#define PIPEMISC_OUTPUT_COLORSPACE_YUV (1<<11) #define PIPEMISC_DITHER_BPC_MASK (7<<5) #define PIPEMISC_DITHER_8_BPC (0<<5) #define PIPEMISC_DITHER_10_BPC (1<<5) diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c index efb13582dc73..4a0e35ede643 100644 --- a/drivers/gpu/drm/i915/intel_ddi.c +++ b/drivers/gpu/drm/i915/intel_ddi.c @@ -1174,6 +1174,9 @@ static void ddi_dotclock_get(struct intel_crtc_state *pipe_config) else dotclock = pipe_config->port_clock; + if (pipe_config->ycbcr420) + dotclock *= 2; + if (pipe_config->pixel_multiplier) dotclock /= pipe_config->pixel_multiplier; diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 77d811993423..146b8173e365 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -7933,6 +7933,7 @@ static void haswell_set_pipemisc(struct drm_crtc *crtc) { struct drm_i915_private *dev_priv = to_i915(crtc->dev); struct intel_crtc *intel_crtc = to_intel_crtc(crtc); + struct intel_crtc_state *config = intel_crtc->config; if (IS_BROADWELL(dev_priv) || INTEL_INFO(dev_priv)->gen >= 9) { u32 val = 0; @@ -7958,6 +7959,12 @@ static void haswell_set_pipemisc(struct drm_crtc *crtc) if (intel_crtc->config->dither) val |= PIPEMISC_DITHER_ENABLE | PIPEMISC_DITHER_TYPE_SP; + if (config->ycbcr420) { + val |= PIPEMISC_OUTPUT_COLORSPACE_YUV | + PIPEMISC_YUV420_ENABLE | + PIPEMISC_YUV420_MODE_FULL_BLEND; + } + I915_WRITE(PIPEMISC(intel_crtc->pipe), val); } } @@ -9022,6 +9029,23 @@ static bool haswell_get_pipe_config(struct intel_crtc *crtc, pipe_config->gamma_mode = I915_READ(GAMMA_MODE(crtc->pipe)) & GAMMA_MODE_MODE_MASK; + if (IS_BROADWELL(dev_priv) || dev_priv->info.gen >= 9) { + u32 tmp = I915_READ(PIPEMISC(crtc->pipe)); + bool clrspace_yuv = tmp & PIPEMISC_OUTPUT_COLORSPACE_YUV; + + if (IS_GEMINILAKE(dev_priv) || dev_priv->info.gen >= 10) { + bool blend_mode_420 = tmp & + PIPEMISC_YUV420_MODE_FULL_BLEND; + + pipe_config->ycbcr420 = tmp & PIPEMISC_YUV420_ENABLE; + if (pipe_config->ycbcr420 != clrspace_yuv || + pipe_config->ycbcr420 != blend_mode_420) + DRM_DEBUG_KMS("Bad 4:2:0 mode (%08x)\n", tmp); + } else if (clrspace_yuv) { + DRM_DEBUG_KMS("YCbCr 4:2:0 Unsupported\n"); + } + } + power_domain = POWER_DOMAIN_PIPE_PANEL_FITTER(crtc->pipe); if (intel_display_power_get_if_enabled(dev_priv, power_domain)) { power_domain_mask |= BIT_ULL(power_domain); @@ -10401,6 +10425,9 @@ static void intel_dump_pipe_config(struct intel_crtc *crtc, pipe_config->fdi_lanes, &pipe_config->fdi_m_n); + if (pipe_config->ycbcr420) + DRM_DEBUG_KMS("YCbCr 4:2:0 output enabled\n"); + if (intel_crtc_has_dp_encoder(pipe_config)) { intel_dump_m_n_config(pipe_config, "dp m_n", pipe_config->lane_count, &pipe_config->dp_m_n); diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c index b62bd8251c2a..b0b6dd19a70d 100644 --- a/drivers/gpu/drm/i915/intel_hdmi.c +++ b/drivers/gpu/drm/i915/intel_hdmi.c @@ -1295,6 +1295,9 @@ intel_hdmi_mode_valid(struct drm_connector *connector, if (mode->flags & DRM_MODE_FLAG_DBLCLK) clock *= 2; + if (drm_mode_is_420_only(&connector->display_info, mode)) + clock /= 2; + /* check if we can do 8bpc */ status = hdmi_port_clock_valid(hdmi, clock, true, force_dvi); -- 2.20.1