From c0550305fcbd82c0b0d094e385551d9c63fc8852 Mon Sep 17 00:00:00 2001 From: Matt Roper Date: Wed, 30 Jan 2019 10:51:20 -0800 Subject: [PATCH] drm/i915: Force background color to black for gen9+ (v2) MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit We don't yet allow userspace to control the CRTC background color, but we should manually program the color to black to ensure the BIOS didn't leave us with some other color. We should also set the pipe gamma and pipe CSC bits so that the background color goes through the same color management transformations that a plane with black pixels would. v2: Rename register to SKL_BOTTOM_COLOR to more closely follow bspec naming. (Ville) Cc: Ville Syrjälä Signed-off-by: Matt Roper Link: https://patchwork.freedesktop.org/patch/msgid/20190130185122.10322-2-matthew.d.roper@intel.com Reviewed-by: Ville Syrjälä --- drivers/gpu/drm/i915/i915_reg.h | 6 ++++++ drivers/gpu/drm/i915/intel_display.c | 19 +++++++++++++++++++ 2 files changed, 25 insertions(+) diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 03adcf3838de..a64deeb4e517 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -5710,6 +5710,12 @@ enum { #define PIPEMISC_DITHER_TYPE_SP (0 << 2) #define PIPEMISC(pipe) _MMIO_PIPE2(pipe, _PIPE_MISC_A) +/* Skylake+ pipe bottom (background) color */ +#define _SKL_BOTTOM_COLOR_A 0x70034 +#define SKL_BOTTOM_COLOR_GAMMA_ENABLE (1 << 31) +#define SKL_BOTTOM_COLOR_CSC_ENABLE (1 << 30) +#define SKL_BOTTOM_COLOR(pipe) _MMIO_PIPE2(pipe, _SKL_BOTTOM_COLOR_A) + #define VLV_DPFLIPSTAT _MMIO(VLV_DISPLAY_BASE + 0x70028) #define PIPEB_LINE_COMPARE_INT_EN (1 << 29) #define PIPEB_HLINE_INT_EN (1 << 28) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index efd1683f61bc..b0bb8adcf26f 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -3930,6 +3930,16 @@ static void intel_update_pipe_config(const struct intel_crtc_state *old_crtc_sta else if (old_crtc_state->pch_pfit.enabled) ironlake_pfit_disable(old_crtc_state); } + + /* + * We don't (yet) allow userspace to control the pipe background color, + * so force it to black, but apply pipe gamma and CSC so that its + * handling will match how we program our planes. + */ + if (INTEL_GEN(dev_priv) >= 9) + I915_WRITE(SKL_BOTTOM_COLOR(crtc->pipe), + SKL_BOTTOM_COLOR_GAMMA_ENABLE | + SKL_BOTTOM_COLOR_CSC_ENABLE); } static void intel_fdi_normal_train(struct intel_crtc *crtc) @@ -15488,6 +15498,15 @@ static void intel_sanitize_crtc(struct intel_crtc *crtc, plane->base.type != DRM_PLANE_TYPE_PRIMARY) intel_plane_disable_noatomic(crtc, plane); } + + /* + * Disable any background color set by the BIOS, but enable the + * gamma and CSC to match how we program our planes. + */ + if (INTEL_GEN(dev_priv) >= 9) + I915_WRITE(SKL_BOTTOM_COLOR(crtc->pipe), + SKL_BOTTOM_COLOR_GAMMA_ENABLE | + SKL_BOTTOM_COLOR_CSC_ENABLE); } /* Adjust the state of the output pipe according to whether we -- 2.11.0