The moves a couple of functions programming the gamma LUT and CSC units into their own file.
On generations prior to Haswell there is only a gamma LUT. From haswell on there is also a new enhanced color correction unit that isn't used yet. This is why we need to set the GAMMA_MODE register, either we're using the legacy 8bits LUT or enhanced LUTs (of 10 or 12bits).
The CSC unit is only available from Haswell on.
We also need to make a special case for CherryView which is recognized as a gen 8 but doesn't have the same enhanced color correction unit from Haswell on.
v2: Fix access to GAMMA_MODE register on older generations than Haswell (from Matt Roper's comments)
Signed-off-by: Lionel Landwerlin lionel.g.landwerlin@intel.com Reviewed-by: Matt Roper matthew.d.roper@intel.com --- drivers/gpu/drm/i915/Makefile | 1 + drivers/gpu/drm/i915/i915_drv.h | 2 + drivers/gpu/drm/i915/intel_color.c | 190 +++++++++++++++++++++++++++++++++++ drivers/gpu/drm/i915/intel_display.c | 163 +++--------------------------- drivers/gpu/drm/i915/intel_drv.h | 10 ++ 5 files changed, 215 insertions(+), 151 deletions(-) create mode 100644 drivers/gpu/drm/i915/intel_color.c
diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile index 0851de07..0516300 100644 --- a/drivers/gpu/drm/i915/Makefile +++ b/drivers/gpu/drm/i915/Makefile @@ -55,6 +55,7 @@ i915-y += intel_audio.o \ intel_atomic.o \ intel_atomic_plane.o \ intel_bios.o \ + intel_color.o \ intel_display.o \ intel_fbc.o \ intel_fifo_underrun.o \ diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 9e76bfc..8cb4418 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -662,6 +662,8 @@ struct drm_i915_display_funcs { /* render clock increase/decrease */ /* display clock increase/decrease */ /* pll clock increase/decrease */ + + void (*load_luts)(struct drm_crtc *crtc); };
enum forcewake_domain_id { diff --git a/drivers/gpu/drm/i915/intel_color.c b/drivers/gpu/drm/i915/intel_color.c new file mode 100644 index 0000000..5e0b997 --- /dev/null +++ b/drivers/gpu/drm/i915/intel_color.c @@ -0,0 +1,190 @@ +/* + * Copyright © 2016 Intel Corporation + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER + * DEALINGS IN THE SOFTWARE. + * + */ + +#include "intel_drv.h" + +/* + * Set up the pipe CSC unit. + * + * Currently only full range RGB to limited range RGB conversion + * is supported, but eventually this should handle various + * RGB<->YCbCr scenarios as well. + */ +static void i9xx_load_csc_matrix(struct drm_crtc *crtc) +{ + 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 (intel_crtc->config->limited_color_range) + coeff = ((235 - 16) * (1 << 12) / 255) & 0xff8; /* 0.xxx... */ + + 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 (intel_crtc->config->limited_color_range) + postoff = (16 * (1 << 12) / 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 (intel_crtc->config->limited_color_range) + mode |= CSC_BLACK_SCREEN_OFFSET; + + I915_WRITE(PIPE_CSC_MODE(pipe), mode); + } +} + +void intel_color_set_csc(struct drm_crtc *crtc) +{ + i9xx_load_csc_matrix(crtc); +} + +/* Loads the palette/gamma unit for the CRTC with the prepared values. */ +static void i9xx_load_luts(struct drm_crtc *crtc) +{ + struct drm_device *dev = crtc->dev; + struct drm_i915_private *dev_priv = dev->dev_private; + struct intel_crtc *intel_crtc = to_intel_crtc(crtc); + enum pipe pipe = intel_crtc->pipe; + int i; + + if (HAS_GMCH_DISPLAY(dev)) { + if (intel_crtc->config->has_dsi_encoder) + assert_dsi_pll_enabled(dev_priv); + else + assert_pll_enabled(dev_priv, pipe); + } + + for (i = 0; i < 256; i++) { + uint32_t word = (intel_crtc->lut_r[i] << 16) | + (intel_crtc->lut_g[i] << 8) | + intel_crtc->lut_b[i]; + if (HAS_GMCH_DISPLAY(dev)) + I915_WRITE(PALETTE(pipe, i), word); + else + I915_WRITE(LGC_PALETTE(pipe, i), word); + } +} + +/* Loads the legacy palette/gamma unit for the CRTC on Haswell+. */ +static void haswell_load_luts(struct drm_crtc *crtc) +{ + struct drm_device *dev = crtc->dev; + struct drm_i915_private *dev_priv = dev->dev_private; + struct intel_crtc *intel_crtc = to_intel_crtc(crtc); + bool reenable_ips = false; + + /* + * Workaround : Do not read or write the pipe palette/gamma data while + * GAMMA_MODE is configured for split gamma and IPS_CTL has IPS enabled. + */ + if (IS_HASWELL(dev) && intel_crtc->config->ips_enabled && + ((I915_READ(GAMMA_MODE(intel_crtc->pipe)) & GAMMA_MODE_MODE_MASK) == + GAMMA_MODE_MODE_SPLIT)) { + hsw_disable_ips(intel_crtc); + reenable_ips = true; + } + I915_WRITE(GAMMA_MODE(intel_crtc->pipe), GAMMA_MODE_MODE_8BIT); + + i9xx_load_luts(crtc); + + if (reenable_ips) + hsw_enable_ips(intel_crtc); +} + +void intel_color_load_luts(struct drm_crtc *crtc) +{ + struct drm_device *dev = crtc->dev; + struct drm_i915_private *dev_priv = dev->dev_private; + + /* The clocks have to be on to load the palette. */ + if (!crtc->state->active) + return; + + dev_priv->display.load_luts(crtc); +} + +void intel_color_legacy_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green, + u16 *blue, uint32_t start, uint32_t size) +{ + int end = (start + size > 256) ? 256 : start + size, i; + struct intel_crtc *intel_crtc = to_intel_crtc(crtc); + + for (i = start; i < end; i++) { + intel_crtc->lut_r[i] = red[i] >> 8; + intel_crtc->lut_g[i] = green[i] >> 8; + intel_crtc->lut_b[i] = blue[i] >> 8; + } + + intel_color_load_luts(crtc); +} + +void intel_color_init(struct drm_crtc *crtc) +{ + 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 i; + + drm_mode_crtc_set_gamma_size(crtc, 256); + for (i = 0; i < 256; i++) { + intel_crtc->lut_r[i] = i; + intel_crtc->lut_g[i] = i; + intel_crtc->lut_b[i] = i; + } + + if (IS_HASWELL(dev) || + (INTEL_INFO(dev)->gen >= 8 && !IS_CHERRYVIEW(dev))) + dev_priv->display.load_luts = haswell_load_luts; + else + dev_priv->display.load_luts = i9xx_load_luts; +} diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 9a18613..cd47f5b 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -101,7 +101,6 @@ static void intel_cpu_transcoder_set_m_n(struct intel_crtc *crtc, struct intel_link_m_n *m2_n2); static void ironlake_set_pipeconf(struct drm_crtc *crtc); static void haswell_set_pipeconf(struct drm_crtc *crtc); -static void intel_set_pipe_csc(struct drm_crtc *crtc); static void vlv_prepare_pll(struct intel_crtc *crtc, const struct intel_crtc_state *pipe_config); static void chv_prepare_pll(struct intel_crtc *crtc, @@ -1165,7 +1164,7 @@ void assert_pll(struct drm_i915_private *dev_priv, }
/* XXX: the dsi pll is shared between MIPI DSI ports */ -static void assert_dsi_pll(struct drm_i915_private *dev_priv, bool state) +void assert_dsi_pll(struct drm_i915_private *dev_priv, bool state) { u32 val; bool cur_state; @@ -1179,8 +1178,6 @@ static void assert_dsi_pll(struct drm_i915_private *dev_priv, bool state) "DSI PLL state assertion failure (expected %s, current %s)\n", onoff(state), onoff(cur_state)); } -#define assert_dsi_pll_enabled(d) assert_dsi_pll(d, true) -#define assert_dsi_pll_disabled(d) assert_dsi_pll(d, false)
struct intel_shared_dpll * intel_crtc_to_shared_dpll(struct intel_crtc *crtc) @@ -3315,7 +3312,7 @@ static void intel_update_pipe_config(struct intel_crtc *crtc, pipe_config->pipe_src_w, pipe_config->pipe_src_h);
if (HAS_DDI(dev)) - intel_set_pipe_csc(&crtc->base); + intel_color_set_csc(&crtc->base);
/* * Update pipe size and adjust fitter if needed: the reason for this is @@ -4626,55 +4623,6 @@ void hsw_disable_ips(struct intel_crtc *crtc) intel_wait_for_vblank(dev, crtc->pipe); }
-/** Loads the palette/gamma unit for the CRTC with the prepared values */ -static void intel_crtc_load_lut(struct drm_crtc *crtc) -{ - struct drm_device *dev = crtc->dev; - struct drm_i915_private *dev_priv = dev->dev_private; - struct intel_crtc *intel_crtc = to_intel_crtc(crtc); - enum pipe pipe = intel_crtc->pipe; - int i; - bool reenable_ips = false; - - /* The clocks have to be on to load the palette. */ - if (!crtc->state->active) - return; - - if (HAS_GMCH_DISPLAY(dev_priv->dev)) { - if (intel_crtc->config->has_dsi_encoder) - assert_dsi_pll_enabled(dev_priv); - else - assert_pll_enabled(dev_priv, pipe); - } - - /* Workaround : Do not read or write the pipe palette/gamma data while - * GAMMA_MODE is configured for split gamma and IPS_CTL has IPS enabled. - */ - if (IS_HASWELL(dev) && intel_crtc->config->ips_enabled && - ((I915_READ(GAMMA_MODE(pipe)) & GAMMA_MODE_MODE_MASK) == - GAMMA_MODE_MODE_SPLIT)) { - hsw_disable_ips(intel_crtc); - reenable_ips = true; - } - - for (i = 0; i < 256; i++) { - i915_reg_t palreg; - - if (HAS_GMCH_DISPLAY(dev)) - palreg = PALETTE(pipe, i); - else - palreg = LGC_PALETTE(pipe, i); - - I915_WRITE(palreg, - (intel_crtc->lut_r[i] << 16) | - (intel_crtc->lut_g[i] << 8) | - intel_crtc->lut_b[i]); - } - - if (reenable_ips) - hsw_enable_ips(intel_crtc); -} - static void intel_crtc_dpms_overlay_disable(struct intel_crtc *intel_crtc) { if (intel_crtc->overlay) { @@ -4923,7 +4871,7 @@ static void ironlake_crtc_enable(struct drm_crtc *crtc) * On ILK+ LUT must be loaded before the pipe is running but with * clocks enabled */ - intel_crtc_load_lut(crtc); + intel_color_load_luts(crtc);
intel_update_watermarks(crtc); intel_enable_pipe(intel_crtc); @@ -4989,7 +4937,7 @@ static void haswell_crtc_enable(struct drm_crtc *crtc)
haswell_set_pipeconf(crtc);
- intel_set_pipe_csc(crtc); + intel_color_set_csc(crtc);
intel_crtc->active = true;
@@ -5018,7 +4966,7 @@ static void haswell_crtc_enable(struct drm_crtc *crtc) * On ILK+ LUT must be loaded before the pipe is running but with * clocks enabled */ - intel_crtc_load_lut(crtc); + intel_color_load_luts(crtc);
intel_ddi_set_pipe_settings(crtc); if (!intel_crtc->config->has_dsi_encoder) @@ -6211,7 +6159,7 @@ static void valleyview_crtc_enable(struct drm_crtc *crtc)
i9xx_pfit_enable(intel_crtc);
- intel_crtc_load_lut(crtc); + intel_color_load_luts(crtc);
intel_enable_pipe(intel_crtc);
@@ -6264,7 +6212,7 @@ static void i9xx_crtc_enable(struct drm_crtc *crtc)
i9xx_pfit_enable(intel_crtc);
- intel_crtc_load_lut(crtc); + intel_color_load_luts(crtc);
intel_update_watermarks(crtc); intel_enable_pipe(intel_crtc); @@ -8719,70 +8667,6 @@ static void ironlake_set_pipeconf(struct drm_crtc *crtc) POSTING_READ(PIPECONF(pipe)); }
-/* - * Set up the pipe CSC unit. - * - * Currently only full range RGB to limited range RGB conversion - * is supported, but eventually this should handle various - * RGB<->YCbCr scenarios as well. - */ -static void intel_set_pipe_csc(struct drm_crtc *crtc) -{ - 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 (intel_crtc->config->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 (intel_crtc->config->limited_color_range) - postoff = (16 * (1 << 12) / 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 (intel_crtc->config->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_device *dev = crtc->dev; @@ -8805,9 +8689,6 @@ static void haswell_set_pipeconf(struct drm_crtc *crtc) I915_WRITE(PIPECONF(cpu_transcoder), val); POSTING_READ(PIPECONF(cpu_transcoder));
- I915_WRITE(GAMMA_MODE(intel_crtc->pipe), GAMMA_MODE_MODE_8BIT); - POSTING_READ(GAMMA_MODE(intel_crtc->pipe)); - if (IS_BROADWELL(dev) || INTEL_INFO(dev)->gen >= 9) { val = 0;
@@ -10220,21 +10101,6 @@ static bool cursor_size_ok(struct drm_device *dev, return true; }
-static void intel_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green, - u16 *blue, uint32_t start, uint32_t size) -{ - int end = (start + size > 256) ? 256 : start + size, i; - struct intel_crtc *intel_crtc = to_intel_crtc(crtc); - - for (i = start; i < end; i++) { - intel_crtc->lut_r[i] = red[i] >> 8; - intel_crtc->lut_g[i] = green[i] >> 8; - intel_crtc->lut_b[i] = blue[i] >> 8; - } - - intel_crtc_load_lut(crtc); -} - /* VESA 640x480x72Hz mode to set on the pipe */ static struct drm_display_mode load_detect_mode = { DRM_MODE("640x480", DRM_MODE_TYPE_DEFAULT, 31500, 640, 664, @@ -11983,7 +11849,7 @@ static int intel_crtc_atomic_check(struct drm_crtc *crtc,
static const struct drm_crtc_helper_funcs intel_helper_funcs = { .mode_set_base_atomic = intel_pipe_set_base_atomic, - .load_lut = intel_crtc_load_lut, + .load_lut = intel_color_load_luts, .atomic_begin = intel_begin_crtc_commit, .atomic_flush = intel_finish_crtc_commit, .atomic_check = intel_crtc_atomic_check, @@ -13609,7 +13475,7 @@ out: #undef for_each_intel_crtc_masked
static const struct drm_crtc_funcs intel_crtc_funcs = { - .gamma_set = intel_crtc_gamma_set, + .gamma_set = intel_color_legacy_gamma_set, .set_config = drm_atomic_helper_set_config, .destroy = intel_crtc_destroy, .page_flip = intel_crtc_page_flip, @@ -14216,7 +14082,7 @@ static void intel_crtc_init(struct drm_device *dev, int pipe) struct intel_crtc_state *crtc_state = NULL; struct drm_plane *primary = NULL; struct drm_plane *cursor = NULL; - int i, ret; + int ret;
intel_crtc = kzalloc(sizeof(*intel_crtc), GFP_KERNEL); if (intel_crtc == NULL) @@ -14252,13 +14118,6 @@ static void intel_crtc_init(struct drm_device *dev, int pipe) if (ret) goto fail;
- drm_mode_crtc_set_gamma_size(&intel_crtc->base, 256); - for (i = 0; i < 256; i++) { - intel_crtc->lut_r[i] = i; - intel_crtc->lut_g[i] = i; - intel_crtc->lut_b[i] = i; - } - /* * On gen2/3 only plane A can do fbc, but the panel fitter and lvds port * is hooked to pipe B. Hence we want plane A feeding pipe B. @@ -14283,6 +14142,8 @@ static void intel_crtc_init(struct drm_device *dev, int pipe)
drm_crtc_helper_add(&intel_crtc->base, &intel_helper_funcs);
+ intel_color_init(&intel_crtc->base); + WARN_ON(drm_crtc_index(&intel_crtc->base) != intel_crtc->pipe); return;
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index 4852049..7532f61 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -1166,6 +1166,9 @@ void assert_pll(struct drm_i915_private *dev_priv, enum pipe pipe, bool state); #define assert_pll_enabled(d, p) assert_pll(d, p, true) #define assert_pll_disabled(d, p) assert_pll(d, p, false) +void assert_dsi_pll(struct drm_i915_private *dev_priv, bool state); +#define assert_dsi_pll_enabled(d) assert_dsi_pll(d, true) +#define assert_dsi_pll_disabled(d) assert_dsi_pll(d, false) void assert_fdi_rx_pll(struct drm_i915_private *dev_priv, enum pipe pipe, bool state); #define assert_fdi_rx_pll_enabled(d, p) assert_fdi_rx_pll(d, p, true) @@ -1618,4 +1621,11 @@ void intel_plane_destroy_state(struct drm_plane *plane, struct drm_plane_state *state); extern const struct drm_plane_helper_funcs intel_plane_helper_funcs;
+/* intel_color.c */ +void intel_color_init(struct drm_crtc *crtc); +void intel_color_set_csc(struct drm_crtc *crtc); +void intel_color_load_luts(struct drm_crtc *crtc); +void intel_color_legacy_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green, + u16 *blue, uint32_t start, uint32_t size); + #endif /* __INTEL_DRV_H__ */