[Intel-gfx] [PATCH 5/6] drm/i915: Implement color management on bdw/skl/bxt/kbl
Matt Roper
matthew.d.roper at intel.com
Fri Feb 19 00:42:53 UTC 2016
On Tue, Feb 09, 2016 at 12:19:17PM +0000, Lionel Landwerlin wrote:
> Patch based on a previous series by Shashank Sharma.
>
> v2: Do not read GAMMA_MODE register to figure what mode we're in
>
> v3: Program PREC_PAL_GC_MAX to clamp pixel values > 1.0
>
> Add documentation on how the Broadcast RGB property is affected by
> CTM_MATRIX
>
> v4: Update contributors
>
> Signed-off-by: Shashank Sharma <shashank.sharma at intel.com>
> Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin at intel.com>
> Signed-off-by: Kumar, Kiran S <kiran.s.kumar at intel.com>
> Signed-off-by: Kausal Malladi <kausalmalladi at gmail.com>
> ---
> Documentation/DocBook/gpu.tmpl | 6 +-
> drivers/gpu/drm/i915/i915_drv.c | 24 ++-
> drivers/gpu/drm/i915/i915_drv.h | 9 +
> drivers/gpu/drm/i915/i915_reg.h | 22 +++
> drivers/gpu/drm/i915/intel_color.c | 367 ++++++++++++++++++++++++++++++-----
> drivers/gpu/drm/i915/intel_display.c | 22 ++-
> drivers/gpu/drm/i915/intel_drv.h | 6 +-
> 7 files changed, 396 insertions(+), 60 deletions(-)
>
> diff --git a/Documentation/DocBook/gpu.tmpl b/Documentation/DocBook/gpu.tmpl
> index 7c49a92..78b8877 100644
> --- a/Documentation/DocBook/gpu.tmpl
> +++ b/Documentation/DocBook/gpu.tmpl
> @@ -2152,7 +2152,11 @@ void intel_crt_init(struct drm_device *dev)
> <td valign="top" >ENUM</td>
> <td valign="top" >{ "Automatic", "Full", "Limited 16:235" }</td>
> <td valign="top" >Connector</td>
> - <td valign="top" >TBD</td>
> + <td valign="top" >When this property is set to Limited 16:235
> + and CTM_MATRIX is set, the hardware will be programmed with
> + the result of the multiplication of CTM_MATRIX by the limited
> + range matrix to ensure the pixels normaly in the range 0..1.0
> + are remapped to the range 16/255..235/255.</td>
> </tr>
> <tr>
> <td valign="top" >“audio”</td>
> diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
> index 44912ec..b65aa20 100644
> --- a/drivers/gpu/drm/i915/i915_drv.c
> +++ b/drivers/gpu/drm/i915/i915_drv.c
> @@ -66,6 +66,9 @@ static struct drm_driver driver;
> #define IVB_CURSOR_OFFSETS \
> .cursor_offsets = { CURSOR_A_OFFSET, IVB_CURSOR_B_OFFSET, IVB_CURSOR_C_OFFSET }
>
> +#define BDW_COLORS \
> + .color = { .degamma_lut_size = 512, .gamma_lut_size = 512 }
> +
> static const struct intel_device_info intel_i830_info = {
> .gen = 2, .is_mobile = 1, .cursor_needs_physical = 1, .num_pipes = 2,
> .has_overlay = 1, .overlay_needs_physical = 1,
> @@ -288,24 +291,28 @@ static const struct intel_device_info intel_haswell_m_info = {
> .is_mobile = 1,
> };
>
> +#define BDW_FEATURES \
> + HSW_FEATURES, \
> + BDW_COLORS
> +
> static const struct intel_device_info intel_broadwell_d_info = {
> - HSW_FEATURES,
> + BDW_FEATURES,
> .gen = 8,
> };
>
> static const struct intel_device_info intel_broadwell_m_info = {
> - HSW_FEATURES,
> + BDW_FEATURES,
> .gen = 8, .is_mobile = 1,
> };
>
> static const struct intel_device_info intel_broadwell_gt3d_info = {
> - HSW_FEATURES,
> + BDW_FEATURES,
> .gen = 8,
> .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING | BSD2_RING,
> };
>
> static const struct intel_device_info intel_broadwell_gt3m_info = {
> - HSW_FEATURES,
> + BDW_FEATURES,
> .gen = 8, .is_mobile = 1,
> .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING | BSD2_RING,
> };
> @@ -321,13 +328,13 @@ static const struct intel_device_info intel_cherryview_info = {
> };
>
> static const struct intel_device_info intel_skylake_info = {
> - HSW_FEATURES,
> + BDW_FEATURES,
> .is_skylake = 1,
> .gen = 9,
> };
>
> static const struct intel_device_info intel_skylake_gt3_info = {
> - HSW_FEATURES,
> + BDW_FEATURES,
> .is_skylake = 1,
> .gen = 9,
> .ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING | BSD2_RING,
> @@ -345,17 +352,18 @@ static const struct intel_device_info intel_broxton_info = {
> .has_fbc = 1,
> GEN_DEFAULT_PIPEOFFSETS,
> IVB_CURSOR_OFFSETS,
> + BDW_COLORS,
> };
>
> static const struct intel_device_info intel_kabylake_info = {
> - HSW_FEATURES,
> + BDW_FEATURES,
> .is_preliminary = 1,
> .is_kabylake = 1,
> .gen = 9,
> };
>
> static const struct intel_device_info intel_kabylake_gt3_info = {
> - HSW_FEATURES,
> + BDW_FEATURES,
> .is_preliminary = 1,
> .is_kabylake = 1,
> .gen = 9,
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index 8216665..c1ca4d0 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -659,6 +659,10 @@ struct drm_i915_display_funcs {
> /* render clock increase/decrease */
> /* display clock increase/decrease */
> /* pll clock increase/decrease */
> +
> + void (*load_degamma_lut)(struct drm_crtc *crtc);
> + void (*load_csc_matrix)(struct drm_crtc *crtc);
> + void (*load_gamma_lut)(struct drm_crtc *crtc);
> };
>
> enum forcewake_domain_id {
> @@ -806,6 +810,11 @@ struct intel_device_info {
> u8 has_slice_pg:1;
> u8 has_subslice_pg:1;
> u8 has_eu_pg:1;
> +
> + struct color_luts {
> + u16 degamma_lut_size;
> + u16 gamma_lut_size;
> + } color;
> };
>
> #undef DEFINE_FLAG
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index f8b0d6c..1dc5d3b 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -7663,6 +7663,28 @@ enum skl_disp_power_wells {
> #define PIPE_CSC_POSTOFF_ME(pipe) _MMIO_PIPE3(pipe, _PIPE_A_CSC_POSTOFF_ME, _PIPE_B_CSC_POSTOFF_ME, _PIPE_C_CSC_POSTOFF_ME)
> #define PIPE_CSC_POSTOFF_LO(pipe) _MMIO_PIPE3(pipe, _PIPE_A_CSC_POSTOFF_LO, _PIPE_B_CSC_POSTOFF_LO, _PIPE_C_CSC_POSTOFF_LO)
>
> +/* pipe degamma/gamma LUTs on IVB+ */
> +#define _PAL_PREC_INDEX_A 0x4A400
> +#define _PAL_PREC_INDEX_B 0x4AC00
> +#define _PAL_PREC_INDEX_C 0x4B400
> +#define PAL_PREC_10_12_BIT (0 << 31)
> +#define PAL_PREC_SPLIT_MODE (1 << 31)
> +#define PAL_PREC_AUTO_INCREMENT (1 << 15)
> +#define _PAL_PREC_DATA_A 0x4A404
> +#define _PAL_PREC_DATA_B 0x4AC04
> +#define _PAL_PREC_DATA_C 0x4B404
> +#define _PAL_PREC_GC_MAX_A 0x4A410
> +#define _PAL_PREC_GC_MAX_B 0x4AC10
> +#define _PAL_PREC_GC_MAX_C 0x4B410
> +#define _PAL_PREC_EXT_GC_MAX_A 0x4A420
> +#define _PAL_PREC_EXT_GC_MAX_B 0x4AC20
> +#define _PAL_PREC_EXT_GC_MAX_C 0x4B420
> +
> +#define PREC_PAL_INDEX(pipe) _MMIO_PIPE3(pipe, _PAL_PREC_INDEX_A, _PAL_PREC_INDEX_B, _PAL_PREC_INDEX_C)
> +#define PREC_PAL_DATA(pipe) _MMIO_PIPE3(pipe, _PAL_PREC_DATA_A, _PAL_PREC_DATA_B, _PAL_PREC_DATA_C)
> +#define PREC_PAL_GC_MAX(pipe, i) _MMIO(_PIPE3(pipe, _PAL_PREC_GC_MAX_A, _PAL_PREC_GC_MAX_B, _PAL_PREC_GC_MAX_C) + (i) * 4)
> +#define PREC_PAL_EXT_GC_MAX(pipe, i) _MMIO(_PIPE3(pipe, _PAL_PREC_EXT_GC_MAX_A, _PAL_PREC_EXT_GC_MAX_B, _PAL_PREC_EXT_GC_MAX_C) + (i) * 4)
> +
> /* MIPI DSI registers */
>
> #define _MIPI_PORT(port, a, c) _PORT3(port, a, 0, c) /* ports A and C only */
> diff --git a/drivers/gpu/drm/i915/intel_color.c b/drivers/gpu/drm/i915/intel_color.c
> index 39ca215..782b9d8 100644
> --- a/drivers/gpu/drm/i915/intel_color.c
> +++ b/drivers/gpu/drm/i915/intel_color.c
> @@ -24,44 +24,169 @@
>
> #include "intel_drv.h"
>
> +#define CTM_COEFF_SIGN (1ULL << 63)
> +
> +#define CTM_COEFF_1_0 (1ULL << 32)
> +#define CTM_COEFF_2_0 (CTM_COEFF_1_0 << 1)
> +#define CTM_COEFF_4_0 (CTM_COEFF_2_0 << 1)
> +#define CTM_COEFF_0_5 (CTM_COEFF_1_0 >> 1)
> +#define CTM_COEFF_0_25 (CTM_COEFF_0_5 >> 1)
> +#define CTM_COEFF_0_125 (CTM_COEFF_0_25 >> 1)
> +
> +#define CTM_COEFF_LIMITED_RANGE ((235ULL - 16ULL) * CTM_COEFF_1_0 / 255)
> +
> +#define CTM_COEFF_NEGATIVE(coeff) (((coeff) & CTM_COEFF_SIGN) != 0)
> +#define CTM_COEFF_ABS(coeff) ((coeff) & (CTM_COEFF_SIGN - 1))
> +
> +/*
> + * Extract the CSC coefficient from a CTM coefficient (in U32.32 fixed point
> + * format). This macro takes the coefficient we want transformed and the
> + * number of fractional bits.
> + *
> + * We only have a 9 bits precision window which slides depending on the value
> + * of the CTM coefficient and we write the value from bit 3. We also round the
> + * value.
> + */
> +#define I9XX_CSC_COEFF_FP(coeff, fbits) \
> + (clamp_val(((coeff) >> (32 - (fbits) - 3)) + 4, 0, 0xfff) & 0xff8)
> +
> +#define I9XX_CSC_COEFF_LIMITED_RANGE \
> + I9XX_CSC_COEFF_FP(CTM_COEFF_LIMITED_RANGE, 9)
> +#define I9XX_CSC_COEFF_1_0 \
> + ((7 << 12) | I9XX_CSC_COEFF_FP(CTM_COEFF_1_0, 8))
> +
> +/*
> + * When using limited range, multiply the matrix given by userspace by
> + * the matrix that we would use for the limited range. We do the
> + * multiplication in U2.30 format.
> + */
> +static void ctm_matrix_mult_by_limited(uint64_t *result,
> + int64_t *input)
> +{
> + int i, j;
> + uint64_t limited_coeffs[9] = { CTM_COEFF_LIMITED_RANGE, 0, 0,
> + 0, CTM_COEFF_LIMITED_RANGE, 0,
> + 0, 0, CTM_COEFF_LIMITED_RANGE };
> +
> + for (i = 0; i < ARRAY_SIZE(limited_coeffs); i++) {
> + int column = i % 3, row = i / 3;
> + int negative = 0;
> +
> + input[i] = 0;
Maybe I'm not understanding the matrix math here, but why are we
clearing input[i]? Was this supposed to be result[i] instead?
> + for (j = 0; j < 3; j++) {
> + int64_t user_coeff = input[j * 3 + column];
> + uint64_t limited_coeff =
> + limited_coeffs[row * 3 + j] >> 2;
> + uint64_t abs_coeff =
> + clamp_val(CTM_COEFF_ABS(user_coeff),
> + 0,
> + CTM_COEFF_4_0 - 1) >> 2;
> +
> + if (CTM_COEFF_NEGATIVE(user_coeff))
> + negative = !negative;
> + result[i] += limited_coeff * abs_coeff;
> + }
> +
> + result[i] >>= 27;
> + if (negative)
> + result[i] |= CTM_COEFF_SIGN;
Given that the limited_coeffs[] matrix is a diagonal matrix, we don't
actually need an inner loop here, right? Would it be simpler to just
replace this with something more like the following?
absuser_coeff = clamp_val(input[i]);
limited_coeff = limited_coeffs[column * 3 + column] >> 2;
result[i] = (absuser_coeff * limited_coeff) >> 27;
if (CTM_COEFF_NEGATIVE(input[i]))
result[i] |= CTM_COEFF_SIGN;
Technically you don't even need to actually store limited_coeffs[] in a
square matrix, although doing so does help clarify for the reader the
kind of matrix math you're performing.
> + }
> +}
> +
> /*
> * 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.
> + * 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_crtc_state *crtc_state = crtc->state;
> 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 */
> + int i, pipe = intel_crtc->pipe;
> + uint16_t coeffs[9] = { 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 (crtc_state->ctm_matrix) {
> + struct drm_color_ctm *ctm =
> + (struct drm_color_ctm *)crtc_state->ctm_matrix->data;
> + uint64_t input[9] = { 0, };
> +
> + if (intel_crtc->config->limited_color_range)
> + ctm_matrix_mult_by_limited(input, ctm->matrix);
> + else {
Minor nitpick; kernel coding standard says we need to use braces on both
branches of an if/else if either of them needs it.
> + for (i = 0; i < ARRAY_SIZE(input); i++)
> + input[i] = ctm->matrix[i];
> + }
>
> - if (intel_crtc->config->limited_color_range)
> - coeff = ((235 - 16) * (1 << 12) / 255) & 0xff8; /* 0.xxx... */
> +
> + /*
> + * Convert fixed point S31.32 input to format supported by the
> + * hardware.
> + */
> + for (i = 0; i < ARRAY_SIZE(coeffs); i++) {
> + uint64_t abs_coeff = ((1ULL << 63) - 1) & input[i];
> +
> + /*
> + * Clamp input value to min/max supported by
> + * hardware.
> + */
> + abs_coeff = clamp_val(abs_coeff, 0, CTM_COEFF_4_0 - 1);
> +
> + /* sign bit */
> + if (CTM_COEFF_NEGATIVE(input[i]))
> + coeffs[i] |= 1 << 15;
> +
> + if (abs_coeff < CTM_COEFF_0_125)
> + coeffs[i] |= (3 << 12) |
> + I9XX_CSC_COEFF_FP(abs_coeff, 12);
> + else if (abs_coeff < CTM_COEFF_0_25)
> + coeffs[i] |= (2 << 12) |
> + I9XX_CSC_COEFF_FP(abs_coeff, 11);
> + else if (abs_coeff < CTM_COEFF_0_5)
> + coeffs[i] |= (1 << 12) |
> + I9XX_CSC_COEFF_FP(abs_coeff, 10);
> + else if (abs_coeff < CTM_COEFF_1_0)
> + coeffs[i] |= I9XX_CSC_COEFF_FP(abs_coeff, 9);
> + else if (abs_coeff < CTM_COEFF_2_0)
> + coeffs[i] |= (7 << 12) |
> + I9XX_CSC_COEFF_FP(abs_coeff, 8);
> + else
> + coeffs[i] |= (6 << 12) |
> + I9XX_CSC_COEFF_FP(abs_coeff, 7);
> + }
> + } else {
> + /*
> + * Load an identify matrix if no coefficients are provided.
> + *
> + * 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.
> + */
> + for (i = 0; i < 3; i++) {
> + if (intel_crtc->config->limited_color_range)
> + coeffs[i * 3 + i] =
> + I9XX_CSC_COEFF_LIMITED_RANGE;
> + else
> + coeffs[i * 3 + i] = I9XX_CSC_COEFF_1_0;
> + }
> + }
>
> /*
> * 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.
> */
Is this comment still relevant/correct? It looks to me like you're
programming the same way the bspec recommends now, at least as far as
the BDW-SKL section goes.
> - I915_WRITE(PIPE_CSC_COEFF_RY_GY(pipe), coeff << 16);
> - I915_WRITE(PIPE_CSC_COEFF_BY(pipe), 0);
> + I915_WRITE(PIPE_CSC_COEFF_RY_GY(pipe), coeffs[0] << 16 | coeffs[1]);
> + I915_WRITE(PIPE_CSC_COEFF_BY(pipe), coeffs[2] << 16);
>
> - I915_WRITE(PIPE_CSC_COEFF_RU_GU(pipe), coeff);
> - I915_WRITE(PIPE_CSC_COEFF_BU(pipe), 0);
> + I915_WRITE(PIPE_CSC_COEFF_RU_GU(pipe), coeffs[3] << 16 | coeffs[4]);
> + I915_WRITE(PIPE_CSC_COEFF_BU(pipe), coeffs[5] << 16);
>
> - I915_WRITE(PIPE_CSC_COEFF_RV_GV(pipe), 0);
> - I915_WRITE(PIPE_CSC_COEFF_BV(pipe), coeff << 16);
> + I915_WRITE(PIPE_CSC_COEFF_RV_GV(pipe), coeffs[6] << 16 | coeffs[7]);
> + I915_WRITE(PIPE_CSC_COEFF_BV(pipe), coeffs[8] << 16);
>
> I915_WRITE(PIPE_CSC_PREOFF_HI(pipe), 0);
> I915_WRITE(PIPE_CSC_PREOFF_ME(pipe), 0);
> @@ -88,21 +213,146 @@ static void i9xx_load_csc_matrix(struct drm_crtc *crtc)
> }
> }
>
> -void intel_color_set_csc(struct drm_crtc *crtc)
> +/** Loads the legacy palette/gamma unit for the CRTC with the prepared
> + * values.
> + */
> +static void i9xx_load_legacy_gamma_lut(struct drm_crtc *crtc)
> {
> - i9xx_load_csc_matrix(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);
> + struct intel_crtc_state *intel_state = to_intel_crtc_state(crtc->state);
> + enum pipe pipe = to_intel_crtc(crtc)->pipe;
> + int i;
> +
> + 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);
> + }
> +
> + intel_state->gamma_mode = GAMMA_MODE_MODE_8BIT;
> + I915_WRITE(GAMMA_MODE(intel_crtc->pipe), GAMMA_MODE_MODE_8BIT);
> }
>
> -/** Loads the palette/gamma unit for the CRTC with the prepared values on */
> -static void i9xx_load_legacy_gamma_lut(struct drm_crtc *crtc)
> +static void broadwell_load_degamma_lut(struct drm_crtc *crtc)
> +{
> + struct drm_device *dev = crtc->dev;
> + struct drm_i915_private *dev_priv = dev->dev_private;
> + struct drm_crtc_state *state = crtc->state;
> + struct intel_crtc_state *intel_state = to_intel_crtc_state(state);
> + enum pipe pipe = to_intel_crtc(crtc)->pipe;
> + uint32_t i, lut_size = INTEL_INFO(dev)->color.degamma_lut_size;
> +
> + I915_WRITE(PREC_PAL_INDEX(pipe),
> + PAL_PREC_SPLIT_MODE | PAL_PREC_AUTO_INCREMENT);
> +
> + if (state->degamma_lut) {
> + struct drm_color_lut *lut =
> + (struct drm_color_lut *) state->degamma_lut->data;
> +
> + for (i = 0; i < lut_size; i++) {
> + uint32_t word =
> + drm_color_lut_extract(lut[i].red, 10) << 20 |
> + drm_color_lut_extract(lut[i].green, 10) << 10 |
> + drm_color_lut_extract(lut[i].blue, 10);
> +
> + I915_WRITE(PREC_PAL_DATA(pipe), word);
> + }
> + } else {
> + for (i = 0; i < lut_size; i++) {
> + uint32_t v = (i * ((1 << 10) - 1)) / (lut_size - 1);
> +
> + I915_WRITE(PREC_PAL_DATA(pipe),
> + (v << 20) | (v << 10) | v);
> + }
> + }
> +
> + intel_state->gamma_mode = GAMMA_MODE_MODE_SPLIT;
> + I915_WRITE(GAMMA_MODE(pipe), GAMMA_MODE_MODE_SPLIT);
> + POSTING_READ(GAMMA_MODE(pipe));
> +
> + /* Reset the index, otherwise it prevents the legacy palette to be
> + * written properly.
> + */
> + I915_WRITE(PREC_PAL_INDEX(pipe), 0);
> +}
> +
> +static void broadwell_load_gamma_lut(struct drm_crtc *crtc)
> +{
> + struct drm_device *dev = crtc->dev;
> + struct drm_i915_private *dev_priv = dev->dev_private;
> + struct drm_crtc_state *state = crtc->state;
> + struct intel_crtc_state *intel_state = to_intel_crtc_state(state);
> + enum pipe pipe = to_intel_crtc(crtc)->pipe;
> + uint32_t i, lut_offset = INTEL_INFO(dev)->color.degamma_lut_size,
> + lut_size = INTEL_INFO(dev)->color.gamma_lut_size;
> +
> +
> + I915_WRITE(PREC_PAL_INDEX(pipe),
> + PAL_PREC_SPLIT_MODE | PAL_PREC_AUTO_INCREMENT | lut_offset);
> +
> + if (state->gamma_lut) {
> + struct drm_color_lut *lut =
> + (struct drm_color_lut *) state->gamma_lut->data;
> +
> + for (i = 0; i < lut_size; i++) {
> + uint32_t word =
> + (drm_color_lut_extract(lut[i].red, 10) << 20) |
> + (drm_color_lut_extract(lut[i].green, 10) << 10) |
> + drm_color_lut_extract(lut[i].blue, 10);
> +
> + I915_WRITE(PREC_PAL_DATA(pipe), word);
> + }
> +
> + /* Program the max register to clamp values > 1.0. */
> + I915_WRITE(PREC_PAL_GC_MAX(pipe, 0),
> + drm_color_lut_extract(lut[i].red, 16));
> + I915_WRITE(PREC_PAL_GC_MAX(pipe, 1),
> + drm_color_lut_extract(lut[i].green, 16));
> + I915_WRITE(PREC_PAL_GC_MAX(pipe, 2),
> + drm_color_lut_extract(lut[i].blue, 16));
> + } else {
> + for (i = 0; i < lut_size; i++) {
> + uint32_t v = (i * ((1 << 10) - 1)) / (lut_size - 1);
> +
> + I915_WRITE(PREC_PAL_DATA(pipe),
> + (v << 20) | (v << 10) | v);
> + }
> +
> + I915_WRITE(PREC_PAL_GC_MAX(pipe, 0), (1 << 16) - 1);
> + I915_WRITE(PREC_PAL_GC_MAX(pipe, 1), (1 << 16) - 1);
> + I915_WRITE(PREC_PAL_GC_MAX(pipe, 2), (1 << 16) - 1);
> + }
> +
> + intel_state->gamma_mode = GAMMA_MODE_MODE_SPLIT;
> + I915_WRITE(GAMMA_MODE(pipe), GAMMA_MODE_MODE_SPLIT);
> + POSTING_READ(GAMMA_MODE(pipe));
> +
> + /* Reset the index, otherwise it prevents the legacy palette to be
> + * written properly.
> + */
> + I915_WRITE(PREC_PAL_INDEX(pipe), 0);
> +}
> +
> +static void intel_color_load_luts_internal(struct drm_crtc *crtc,
> + bool legacy)
> {
> 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;
> + struct intel_crtc_state *intel_state = to_intel_crtc_state(crtc->state);
> + enum pipe pipe = to_intel_crtc(crtc)->pipe;
> bool reenable_ips = false;
>
> + /* The clocks have to be on to load the palette. */
> + if (!crtc->state->active)
> + return;
> +
> if (HAS_GMCH_DISPLAY(dev)) {
> if (intel_crtc->config->has_dsi_encoder)
> assert_dsi_pll_enabled(dev_priv);
> @@ -114,42 +364,32 @@ static void i9xx_load_legacy_gamma_lut(struct drm_crtc *crtc)
> * 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)) {
> + intel_state->gamma_mode == GAMMA_MODE_MODE_SPLIT) {
> hsw_disable_ips(intel_crtc);
> reenable_ips = true;
> }
>
> - 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);
> + if (legacy)
> + i9xx_load_legacy_gamma_lut(crtc);
> + else {
> + dev_priv->display.load_degamma_lut(crtc);
> + dev_priv->display.load_gamma_lut(crtc);
> }
>
> - I915_WRITE(GAMMA_MODE(intel_crtc->pipe), GAMMA_MODE_MODE_8BIT);
> -
> if (reenable_ips)
> hsw_enable_ips(intel_crtc);
> }
>
> -void intel_color_load_gamma_lut(struct drm_crtc *crtc)
> +void intel_color_legacy_load_lut(struct drm_crtc *crtc)
> {
> - /* The clocks have to be on to load the palette. */
> - if (!crtc->state->active)
> - return;
> -
> - i9xx_load_legacy_gamma_lut(crtc);
> + intel_color_load_luts_internal(crtc, true);
> }
>
> 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);
> + int end = (start + size > 256) ? 256 : start + size, i;
>
> for (i = start; i < end; i++) {
> intel_crtc->lut_r[i] = red[i] >> 8;
> @@ -157,11 +397,29 @@ void intel_color_legacy_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
> intel_crtc->lut_b[i] = blue[i] >> 8;
> }
>
> - intel_color_load_gamma_lut(crtc);
> + intel_color_load_luts_internal(crtc, true);
> +}
> +
> +void intel_color_load_luts(struct drm_crtc *crtc)
> +{
> + intel_color_load_luts_internal(crtc,
> + !crtc->state->degamma_lut &&
> + !crtc->state->gamma_lut);
> +}
> +
> +void intel_color_set_csc(struct drm_crtc *crtc)
> +{
> + struct drm_device *dev = crtc->dev;
> + struct drm_i915_private *dev_priv = dev->dev_private;
> +
> + if (dev_priv->display.load_csc_matrix)
> + dev_priv->display.load_csc_matrix(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;
>
> @@ -171,4 +429,23 @@ void intel_color_init(struct drm_crtc *crtc)
> intel_crtc->lut_g[i] = i;
> intel_crtc->lut_b[i] = i;
> }
> +
> + if (IS_BROADWELL(dev) || IS_SKYLAKE(dev) ||
> + IS_BROXTON(dev) || IS_KABYLAKE(dev)) {
> + dev_priv->display.load_degamma_lut = broadwell_load_degamma_lut;
> + dev_priv->display.load_gamma_lut = broadwell_load_gamma_lut;
> + dev_priv->display.load_csc_matrix = i9xx_load_csc_matrix;
> + } else {
> + dev_priv->display.load_csc_matrix = i9xx_load_csc_matrix;
> + }
> +
> + if (INTEL_INFO(dev)->color.degamma_lut_size != 0 &&
> + INTEL_INFO(dev)->color.gamma_lut_size != 0) {
> + WARN_ON(!dev_priv->display.load_degamma_lut ||
> + !dev_priv->display.load_gamma_lut ||
> + !dev_priv->display.load_csc_matrix);
> + drm_helper_crtc_enable_color_mgmt(crtc,
> + INTEL_INFO(dev)->color.degamma_lut_size,
> + INTEL_INFO(dev)->color.gamma_lut_size);
> + }
> }
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index f10bba2..e38b31b 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -4864,7 +4864,7 @@ 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_color_load_gamma_lut(crtc);
> + intel_color_load_luts(crtc);
>
> intel_update_watermarks(crtc);
> intel_enable_pipe(intel_crtc);
> @@ -4959,7 +4959,7 @@ 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_color_load_gamma_lut(crtc);
> + intel_color_load_luts(crtc);
>
> intel_ddi_set_pipe_settings(crtc);
> if (!intel_crtc->config->has_dsi_encoder)
> @@ -6174,7 +6174,7 @@ static void valleyview_crtc_enable(struct drm_crtc *crtc)
>
> i9xx_pfit_enable(intel_crtc);
>
> - intel_color_load_gamma_lut(crtc);
> + intel_color_load_luts(crtc);
>
> intel_enable_pipe(intel_crtc);
>
> @@ -6227,7 +6227,7 @@ static void i9xx_crtc_enable(struct drm_crtc *crtc)
>
> i9xx_pfit_enable(intel_crtc);
>
> - intel_color_load_gamma_lut(crtc);
> + intel_color_load_luts(crtc);
>
> intel_update_watermarks(crtc);
> intel_enable_pipe(intel_crtc);
> @@ -11898,7 +11898,7 @@ 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_color_load_gamma_lut,
> + .load_lut = intel_color_legacy_load_lut,
> .atomic_begin = intel_begin_crtc_commit,
> .atomic_flush = intel_finish_crtc_commit,
> .atomic_check = intel_crtc_atomic_check,
> @@ -13428,6 +13428,17 @@ static int intel_atomic_commit(struct drm_device *dev,
> hw_check = true;
> }
>
> + if (!modeset &&
> + crtc->state->active &&
> + crtc->state->color_mgmt_changed) {
> + /* Only update color management when not doing
Minor nitpick; kernel coding style says the opening "/*" of multi-line
comments should be on a line by itself.
> + * a modeset as this will be done by
> + * crtc_enable already.
> + */
> + intel_color_set_csc(crtc);
> + intel_color_load_luts(crtc);
> + }
> +
> if (!modeset)
> intel_pre_plane_update(to_intel_crtc_state(crtc_state));
>
> @@ -13519,6 +13530,7 @@ out:
> static const struct drm_crtc_funcs intel_crtc_funcs = {
> .gamma_set = intel_color_legacy_gamma_set,
> .set_config = drm_atomic_helper_set_config,
> + .set_property = drm_atomic_helper_crtc_set_property,
> .destroy = intel_crtc_destroy,
> .page_flip = intel_crtc_page_flip,
> .atomic_duplicate_state = intel_crtc_duplicate_state,
> diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
> index 2b5d03a..c384c78 100644
> --- a/drivers/gpu/drm/i915/intel_drv.h
> +++ b/drivers/gpu/drm/i915/intel_drv.h
> @@ -507,6 +507,8 @@ struct intel_crtc_state {
> /* IVB sprite scaling w/a (WaCxSRDisabledForSpriteScaling:ivb) */
> bool disable_lp_wm;
>
> + uint32_t gamma_mode;
> +
> struct {
> /*
> * optimal watermarks, programmed post-vblank when this state
> @@ -1620,9 +1622,11 @@ 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_update(struct drm_crtc *crtc);
> void intel_color_set_csc(struct drm_crtc *crtc);
> -void intel_color_load_gamma_lut(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);
> +void intel_color_legacy_load_lut(struct drm_crtc *crtc);
intel_color_load_gamma_lut() was a rename from patch #1 of the series.
Maybe we should squash this name change back into that patch, even
though we only have a single LUT at that point? I guess it doesn't
really matter too much either way.
Matt
>
> #endif /* __INTEL_DRV_H__ */
> --
> 2.7.0
>
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/intel-gfx
--
Matt Roper
Graphics Software Engineer
IoTG Platform Enabling & Development
Intel Corporation
(916) 356-2795
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