From: Ville Syrjälä Date: Fri, 18 Jan 2013 17:11:38 +0000 (+0200) Subject: drm/i915: Implement pipe CSC based limited range RGB output X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=86d3efce2c37d3fb98f75f56f21e6ab75c745bb6;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git drm/i915: Implement pipe CSC based limited range RGB output HSW no longer has the PIPECONF bit for limited range RGB output. Instead the pipe CSC unit must be used to perform that task. The CSC pre offset are set to 0, since the incoming data is full [0:255] range RGB, the coefficients are programmed to compress the data into [0:219] range, and then we use either the CSC_MODE black screen offset bit, or the CSC post offsets to shift the data to the correct [16:235] range. Also have to change the confiuration of all planes so that the data is sent through the pipe CSC unit. For simplicity send the plane data through the pipe CSC unit always, and in case full range output is requested, the pipe CSC unit is set up with an identity transform to pass the plane data through unchanged. I've been told by some hardware people that the use of the pipe CSC unit shouldn't result in any measurable increase in power consumption numbers. Signed-off-by: Ville Syrjälä Reviewed-by: Paulo Zanoni Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 7e77396a154e..527b664d3434 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -2949,6 +2949,7 @@ #define CURSOR_ENABLE 0x80000000 #define CURSOR_GAMMA_ENABLE 0x40000000 #define CURSOR_STRIDE_MASK 0x30000000 +#define CURSOR_PIPE_CSC_ENABLE (1<<24) #define CURSOR_FORMAT_SHIFT 24 #define CURSOR_FORMAT_MASK (0x07 << CURSOR_FORMAT_SHIFT) #define CURSOR_FORMAT_2C (0x00 << CURSOR_FORMAT_SHIFT) @@ -3010,6 +3011,7 @@ #define DISPPLANE_RGBA888 (0xf<<26) #define DISPPLANE_STEREO_ENABLE (1<<25) #define DISPPLANE_STEREO_DISABLE 0 +#define DISPPLANE_PIPE_CSC_ENABLE (1<<24) #define DISPPLANE_SEL_PIPE_SHIFT 24 #define DISPPLANE_SEL_PIPE_MASK (3<YCbCr scenarios as well. + */ +static void intel_set_pipe_csc(struct drm_crtc *crtc, + const struct drm_display_mode *adjusted_mode) +{ + struct drm_device *dev = crtc->dev; + struct drm_i915_private *dev_priv = dev->dev_private; + struct intel_crtc *intel_crtc = to_intel_crtc(crtc); + int pipe = intel_crtc->pipe; + uint16_t coeff = 0x7800; /* 1.0 */ + + /* + * TODO: Check what kind of values actually come out of the pipe + * with these coeff/postoff values and adjust to get the best + * accuracy. Perhaps we even need to take the bpc value into + * consideration. + */ + + if (adjusted_mode->private_flags & INTEL_MODE_LIMITED_COLOR_RANGE) + coeff = ((235 - 16) * (1 << 12) / 255) & 0xff8; /* 0.xxx... */ + + /* + * GY/GU and RY/RU should be the other way around according + * to BSpec, but reality doesn't agree. Just set them up in + * a way that results in the correct picture. + */ + I915_WRITE(PIPE_CSC_COEFF_RY_GY(pipe), coeff << 16); + I915_WRITE(PIPE_CSC_COEFF_BY(pipe), 0); + + I915_WRITE(PIPE_CSC_COEFF_RU_GU(pipe), coeff); + I915_WRITE(PIPE_CSC_COEFF_BU(pipe), 0); + + I915_WRITE(PIPE_CSC_COEFF_RV_GV(pipe), 0); + I915_WRITE(PIPE_CSC_COEFF_BV(pipe), coeff << 16); + + I915_WRITE(PIPE_CSC_PREOFF_HI(pipe), 0); + I915_WRITE(PIPE_CSC_PREOFF_ME(pipe), 0); + I915_WRITE(PIPE_CSC_PREOFF_LO(pipe), 0); + + if (INTEL_INFO(dev)->gen > 6) { + uint16_t postoff = 0; + + if (adjusted_mode->private_flags & INTEL_MODE_LIMITED_COLOR_RANGE) + postoff = (16 * (1 << 13) / 255) & 0x1fff; + + I915_WRITE(PIPE_CSC_POSTOFF_HI(pipe), postoff); + I915_WRITE(PIPE_CSC_POSTOFF_ME(pipe), postoff); + I915_WRITE(PIPE_CSC_POSTOFF_LO(pipe), postoff); + + I915_WRITE(PIPE_CSC_MODE(pipe), 0); + } else { + uint32_t mode = CSC_MODE_YUV_TO_RGB; + + if (adjusted_mode->private_flags & INTEL_MODE_LIMITED_COLOR_RANGE) + mode |= CSC_BLACK_SCREEN_OFFSET; + + I915_WRITE(PIPE_CSC_MODE(pipe), mode); + } +} + static void haswell_set_pipeconf(struct drm_crtc *crtc, struct drm_display_mode *adjusted_mode, bool dither) @@ -5714,8 +5779,10 @@ static int haswell_crtc_mode_set(struct drm_crtc *crtc, haswell_set_pipeconf(crtc, adjusted_mode, dither); + intel_set_pipe_csc(crtc, adjusted_mode); + /* Set up the display plane register */ - I915_WRITE(DSPCNTR(plane), DISPPLANE_GAMMA_ENABLE); + I915_WRITE(DSPCNTR(plane), DISPPLANE_GAMMA_ENABLE | DISPPLANE_PIPE_CSC_ENABLE); POSTING_READ(DSPCNTR(plane)); ret = intel_pipe_set_base(crtc, x, y, fb); @@ -6120,6 +6187,8 @@ static void ivb_update_cursor(struct drm_crtc *crtc, u32 base) cntl &= ~(CURSOR_MODE | MCURSOR_GAMMA_ENABLE); cntl |= CURSOR_MODE_DISABLE; } + if (IS_HASWELL(dev)) + cntl |= CURSOR_PIPE_CSC_ENABLE; I915_WRITE(CURCNTR_IVB(pipe), cntl); intel_crtc->cursor_visible = visible; diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c index 03cfd62d17e2..d086e48a831a 100644 --- a/drivers/gpu/drm/i915/intel_sprite.c +++ b/drivers/gpu/drm/i915/intel_sprite.c @@ -90,6 +90,9 @@ ivb_update_plane(struct drm_plane *plane, struct drm_framebuffer *fb, sprctl |= SPRITE_TRICKLE_FEED_DISABLE; sprctl |= SPRITE_ENABLE; + if (IS_HASWELL(dev)) + sprctl |= SPRITE_PIPE_CSC_ENABLE; + /* Sizes are 0 based */ src_w--; src_h--;