From: Shashank Sharma <shashank.sharma@xxxxxxxxx>
Implement degamma, csc and gamma steps on BDW+.
Signed-off-by: Shashank Sharma <shashank.sharma@xxxxxxxxx>
Signed-off-by: Kausal Malladi <kausalmalladi@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_drv.c | 14 +
drivers/gpu/drm/i915/i915_reg.h | 43 ++-
drivers/gpu/drm/i915/intel_color_manager.c | 451 +++++++++++++++++++++++++++++
drivers/gpu/drm/i915/intel_color_manager.h | 20 ++
4 files changed, 525 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 4396300..395e5ad 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -289,22 +289,30 @@ static const struct intel_device_info intel_haswell_m_info = {
static const struct intel_device_info intel_broadwell_d_info = {
HSW_FEATURES,
.gen = 8,
+ .num_samples_after_ctm = BDW_SPLITGAMMA_MAX_VALS,
+ .num_samples_before_ctm = BDW_DEGAMMA_MAX_VALS,
};
static const struct intel_device_info intel_broadwell_m_info = {
HSW_FEATURES,
.gen = 8, .is_mobile = 1,
+ .num_samples_after_ctm = BDW_SPLITGAMMA_MAX_VALS,
+ .num_samples_before_ctm = BDW_DEGAMMA_MAX_VALS,
};
static const struct intel_device_info intel_broadwell_gt3d_info = {
HSW_FEATURES,
.gen = 8,
+ .num_samples_after_ctm = BDW_SPLITGAMMA_MAX_VALS,
+ .num_samples_before_ctm = BDW_DEGAMMA_MAX_VALS,
.ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING | BSD2_RING,
};
static const struct intel_device_info intel_broadwell_gt3m_info = {
HSW_FEATURES,
.gen = 8, .is_mobile = 1,
+ .num_samples_after_ctm = BDW_SPLITGAMMA_MAX_VALS,
+ .num_samples_before_ctm = BDW_DEGAMMA_MAX_VALS,
.ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING | BSD2_RING,
};
@@ -324,12 +332,16 @@ static const struct intel_device_info intel_skylake_info = {
HSW_FEATURES,
.is_skylake = 1,
.gen = 9,
+ .num_samples_after_ctm = BDW_SPLITGAMMA_MAX_VALS,
+ .num_samples_before_ctm = BDW_DEGAMMA_MAX_VALS,
};
static const struct intel_device_info intel_skylake_gt3_info = {
HSW_FEATURES,
.is_skylake = 1,
.gen = 9,
+ .num_samples_before_ctm = BDW_DEGAMMA_MAX_VALS,
+ .num_samples_after_ctm = BDW_SPLITGAMMA_MAX_VALS,
.ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING | BSD2_RING,
};
@@ -339,6 +351,8 @@ static const struct intel_device_info intel_broxton_info = {
.gen = 9,
.need_gfx_hws = 1, .has_hotplug = 1,
.ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING,
+ .num_samples_after_ctm = BDW_SPLITGAMMA_MAX_VALS,
+ .num_samples_before_ctm = BDW_DEGAMMA_MAX_VALS,
.num_pipes = 3,
.has_ddi = 1,
.has_fpga_dbg = 1,
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 36bb320..c4da842 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -5748,11 +5748,19 @@ enum skl_disp_power_wells {
/* legacy palette */
#define _LGC_PALETTE_A 0x4a000
#define _LGC_PALETTE_B 0x4a800
-#define LGC_PALETTE(pipe, i) _MMIO(_PIPE(pipe, _LGC_PALETTE_A, _LGC_PALETTE_B) + (i) * 4)
+#define _LGC_PALETTE_C 0x4b000
+#define LGC_PALETTE(pipe, i) _MMIO(_PIPE3(pipe, \
+ _LGC_PALETTE_A, \
+ _LGC_PALETTE_B, \
+ _LGC_PALETTE_C) + (i) * 4)
#define _GAMMA_MODE_A 0x4a480
#define _GAMMA_MODE_B 0x4ac80
-#define GAMMA_MODE(pipe) _MMIO_PIPE(pipe, _GAMMA_MODE_A, _GAMMA_MODE_B)
+#define _GAMMA_MODE_C 0x4b480
+#define GAMMA_MODE(pipe) _MMIO(_PIPE3(pipe, \
+ _GAMMA_MODE_A, \
+ _GAMMA_MODE_B, \
+ _GAMMA_MODE_C))
#define GAMMA_MODE_MODE_MASK (3 << 0)
#define GAMMA_MODE_MODE_8BIT (0 << 0)
#define GAMMA_MODE_MODE_10BIT (1 << 0)
@@ -8178,6 +8186,35 @@ enum skl_disp_power_wells {
#define _PIPE_CSC_BASE(pipe) \
(_PIPE3(pipe, PIPEA_CGM_CSC, PIPEB_CGM_CSC, PIPEC_CGM_CSC))
-
+/* BDW gamma correction */
+#define PAL_PREC_INDEX_A 0x4A400
+#define PAL_PREC_INDEX_B 0x4AC00
+#define PAL_PREC_INDEX_C 0x4B400
+#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) \
+ (_PIPE3(pipe, PAL_PREC_INDEX_A, PAL_PREC_INDEX_B, PAL_PREC_INDEX_C))
+#define _PREC_PAL_DATA(pipe) \
+ (_PIPE3(pipe, PAL_PREC_DATA_A, PAL_PREC_DATA_B, PAL_PREC_DATA_C))
+#define _PREC_PAL_GC_MAX(pipe) \
+ (_PIPE3(pipe, PAL_PREC_GC_MAX_A, PAL_PREC_GC_MAX_B, PAL_PREC_GC_MAX_C))
+#define _PREC_PAL_EXT_GC_MAX(pipe) \
+ (_PIPE3(pipe, PAL_PREC_EXT_GC_MAX_A, PAL_PREC_EXT_GC_MAX_B, PAL_PREC_EXT_GC_MAX_C))
+
+
+/* BDW CSC correction */
+#define CSC_COEFF_A 0x49010
+#define CSC_COEFF_B 0x49110
+#define CSC_COEFF_C 0x49210
+#define _PIPE_CSC_COEFF(pipe) \
+ (_PIPE3(pipe, CSC_COEFF_A, CSC_COEFF_B, CSC_COEFF_C))
#endif /* _I915_REG_H_ */
diff --git a/drivers/gpu/drm/i915/intel_color_manager.c b/drivers/gpu/drm/i915/intel_color_manager.c
index 02eee98..bca07c1 100644
--- a/drivers/gpu/drm/i915/intel_color_manager.c
+++ b/drivers/gpu/drm/i915/intel_color_manager.c
@@ -27,6 +27,451 @@
#include "intel_color_manager.h"
+static void bdw_write_8bit_gamma_legacy(struct drm_device *dev,
+ struct drm_r32g32b32 *correction_values, i915_reg_t palette)
+{
+ u16 blue_fract, green_fract, red_fract;
+ u32 blue, green, red;
+ u32 count = 0;
+ u32 word = 0;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+
+ while (count < BDW_8BIT_GAMMA_MAX_VALS) {
+ blue = correction_values[count].b32;
+ green = correction_values[count].g32;
+ red = correction_values[count].r32;
+
+ /*
+ * Maximum possible gamma correction value supported
+ * for BDW is 0xFFFFFFFF, so clamp the values accordingly
+ */
+ if (blue >= BDW_MAX_GAMMA)
+ blue = BDW_MAX_GAMMA;
+ if (green >= BDW_MAX_GAMMA)
+ green = BDW_MAX_GAMMA;
+ if (red >= BDW_MAX_GAMMA)
+ red = BDW_MAX_GAMMA;
+
+ blue_fract = GET_BITS(blue, 16, 8);
+ green_fract = GET_BITS(green, 16, 8);
+ red_fract = GET_BITS(red, 16, 8);
+
+ /* Blue (7:0) Green (15:8) and Red (23:16) */
+ SET_BITS(word, blue_fract, 0, 8);
+ SET_BITS(word, green_fract, 8, 8);
+ SET_BITS(word, red_fract, 16, 8);
+ I915_WRITE(palette, word);
+ palette.reg += 4;
+ count++;
+ }
+}
+
+static void bdw_write_10bit_gamma_precision(struct drm_device *dev,
+ struct drm_r32g32b32 *correction_values, i915_reg_t pal_prec_data,
+ u32 no_of_coeff)
+{
+ u16 blue_fract, green_fract, red_fract;
+ u32 word = 0;
+ u32 count = 0;
+ u32 blue, green, red;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+
+ while (count < no_of_coeff) {
+
+ blue = correction_values[count].b32;
+ green = correction_values[count].g32;
+ red = correction_values[count].r32;
+
+ /*
+ * Maximum possible gamma correction value supported
+ * for BDW is 0xFFFFFFFF, so clamp the values accordingly
+ */
+ if (blue >= BDW_MAX_GAMMA)
+ blue = BDW_MAX_GAMMA;
+ if (green >= BDW_MAX_GAMMA)
+ green = BDW_MAX_GAMMA;
+ if (red >= BDW_MAX_GAMMA)
+ red = BDW_MAX_GAMMA;
+
+ /*
+ * Gamma correction values are sent in 8.24 format
+ * with 8 int and 24 fraction bits. BDW 10 bit gamma
+ * unit expects correction registers to be programmed in
+ * 0.10 format, with 0 int and 16 fraction bits. So take
+ * MSB 10 bit values(bits 23-14) from the fraction part and
+ * prepare the correction registers.
+ */
+ blue_fract = GET_BITS(blue, 14, 10);
+ green_fract = GET_BITS(green, 14, 10);
+ red_fract = GET_BITS(red, 14, 10);
+
+ /* Arrange: Red (29:20) Green (19:10) and Blue (9:0) */
+ SET_BITS(word, red_fract, 20, 10);
+ SET_BITS(word, green_fract, 10, 10);
+ SET_BITS(word, blue_fract, 0, 10);
+ I915_WRITE(pal_prec_data, word);
+ count++;
+ }
+ DRM_DEBUG_DRIVER("Gamma correction programmed\n");
+}
+
+static void bdw_write_12bit_gamma_precision(struct drm_device *dev,
+ struct drm_r32g32b32 *correction_values, i915_reg_t pal_prec_data,
+ enum pipe pipe)
+{
+ uint16_t blue_fract, green_fract, red_fract;
+ uint32_t gcmax;
+ uint32_t word = 0;
+ uint32_t count = 0;
+ i915_reg_t gcmax_reg;
+ u32 blue, green, red;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+
+ /* Program first 512 values in precision palette */
+ while (count < BDW_12BIT_GAMMA_MAX_VALS - 1) {
+
+ blue = correction_values[count].b32;
+ green = correction_values[count].g32;
+ red = correction_values[count].r32;
+
+ /*
+ * Maximum possible gamma correction value supported
+ * for BDW is 0xFFFFFFFF, so clamp the values accordingly
+ */
+ if (blue >= BDW_MAX_GAMMA)
+ blue = BDW_MAX_GAMMA;
+ if (green >= BDW_MAX_GAMMA)
+ green = BDW_MAX_GAMMA;
+ if (red >= BDW_MAX_GAMMA)
+ red = BDW_MAX_GAMMA;
+
+ /*
+ * Framework's general gamma format is 8.24 (8 int 16 fraction)
+ * BDW Platform's supported gamma format is 16 bit correction
+ * values in 0.16 format. So extract higher 16 fraction bits
+ * from 8.24 gamma correction values.
+ */
+ red_fract = GET_BITS(red, 8, 16);
+ green_fract = GET_BITS(green, 8, 16);
+ blue_fract = GET_BITS(blue, 8, 16);
+
+ /*
+ * From the bspec:
+ * For 12 bit gamma correction, program precision palette
+ * with 16 bits per color in a 0.16 format with 0 integer and
+ * 16 fractional bits (upper 10 bits in odd indexes, lower 6
+ * bits in even indexes)
+ */
+
+ /* Even index: Lower 6 bits from correction should go as MSB */
+ SET_BITS(word, GET_BITS(red_fract, 0, 6), 24, 6);
+ SET_BITS(word, GET_BITS(green_fract, 0, 6), 14, 6);
+ SET_BITS(word, GET_BITS(blue_fract, 0, 6), 4, 6);
+ I915_WRITE(pal_prec_data, word);
+
+ word = 0x0;
+ /* Odd index: Upper 10 bits of correction should go as MSB */
+ SET_BITS(word, GET_BITS(red_fract, 6, 10), 20, 10);
+ SET_BITS(word, GET_BITS(green_fract, 6, 10), 10, 10);
+ SET_BITS(word, GET_BITS(blue_fract, 6, 10), 0, 10);
+
+ I915_WRITE(pal_prec_data, word);
+ count++;
+ }
+
+ /* Now program the 513th value in GCMAX regs */
+ word = 0;
+ gcmax_reg = _MMIO(_PREC_PAL_GC_MAX(pipe));
+ gcmax = min_t(u32, GET_BITS(correction_values[count].r32, 8, 17),
+ BDW_MAX_GAMMA);
+ SET_BITS(word, gcmax, 0, 17);
+ I915_WRITE(gcmax_reg, word);
+ gcmax_reg.reg += 4;
+
+ word = 0;
+ gcmax = min_t(u32, GET_BITS(correction_values[count].g32, 8, 17),
+ BDW_MAX_GAMMA);
+ SET_BITS(word, gcmax, 0, 17);
+ I915_WRITE(gcmax_reg, word);
+ gcmax_reg.reg += 4;
+
+ word = 0;
+ gcmax = min_t(u32, GET_BITS(correction_values[count].b32, 8, 17),
+ BDW_MAX_GAMMA);
+ SET_BITS(word, gcmax, 0, 17);
+ I915_WRITE(gcmax_reg, word);
+}
+
+/* Apply unity gamma for gamma reset */
+static void bdw_reset_gamma(struct drm_i915_private *dev_priv,
+ enum pipe pipe)
+{
+ u16 count = 0;
+ u32 val;
+ i915_reg_t pal_prec_data = LGC_PALETTE(pipe, 0);
+
+ DRM_DEBUG_DRIVER("\n");
+
+ /* Reset the palette for unit gamma */
+ while (count < BDW_8BIT_GAMMA_MAX_VALS) {
+ /* Red (23:16) Green (15:8) and Blue (7:0) */
+ val = (count << 16) | (count << 8) | count;
+ I915_WRITE(pal_prec_data, val);
+ pal_prec_data.reg += 4;
+ count++;
+ }
+}
+
+static int bdw_set_gamma(struct drm_device *dev, struct drm_property_blob *blob,
+ struct drm_crtc *crtc)
+{
+ enum pipe pipe;
+ int num_samples;
+ i915_reg_t pal_prec_index, pal_prec_data;
+ u32 mode, index, word = 0;
+ struct drm_palette *gamma_data;
+ struct drm_crtc_state *state = crtc->state;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct drm_r32g32b32 *correction_values = NULL;
+
+ if (WARN_ON(!blob))
+ return -EINVAL;
+
+ gamma_data = (struct drm_palette *)blob->data;
+ pipe = to_intel_crtc(crtc)->pipe;
+ num_samples = blob->length / sizeof(struct drm_r32g32b32);
+
+ pal_prec_index = _MMIO(_PREC_PAL_INDEX(pipe));
+ pal_prec_data = _MMIO(_PREC_PAL_DATA(pipe));
+ correction_values = (struct drm_r32g32b32 *)&gamma_data->lut;
+
+ switch (num_samples) {
+ case GAMMA_DISABLE_VALS:
+ /* Disable Gamma functionality on Pipe */
+ DRM_DEBUG_DRIVER("Disabling gamma on Pipe %c\n",
+ pipe_name(pipe));
+ if ((mode & GAMMA_MODE_MODE_MASK) == GAMMA_MODE_MODE_12BIT)
+ bdw_reset_gamma(dev_priv, pipe);
+ state->palette_after_ctm_blob = NULL;
+ word = GAMMA_MODE_MODE_8BIT;
+ break;
+
+ case BDW_8BIT_GAMMA_MAX_VALS:
+ /* Legacy palette */
+ bdw_write_8bit_gamma_legacy(dev, correction_values,
+ LGC_PALETTE(pipe, 0));
+ word = GAMMA_MODE_MODE_8BIT;
+ break;
+
+ case BDW_SPLITGAMMA_MAX_VALS:
+ index = num_samples;
+ index |= BDW_INDEX_AUTO_INCREMENT | BDW_INDEX_SPLIT_MODE;
+ I915_WRITE(pal_prec_index, index);
+ bdw_write_10bit_gamma_precision(dev, correction_values,
+ pal_prec_data, BDW_SPLITGAMMA_MAX_VALS);
+ word = GAMMA_MODE_MODE_SPLIT;
+ break;
+
+ case BDW_12BIT_GAMMA_MAX_VALS:
+ index = BDW_INDEX_AUTO_INCREMENT;
+ I915_WRITE(pal_prec_index, index);
+ bdw_write_12bit_gamma_precision(dev, correction_values,
+ pal_prec_data, pipe);
+ word = GAMMA_MODE_MODE_12BIT;
+ break;
+
+ case BDW_10BIT_GAMMA_MAX_VALS:
+ index = BDW_INDEX_AUTO_INCREMENT;
+ I915_WRITE(pal_prec_index, index);
+ bdw_write_10bit_gamma_precision(dev, correction_values,
+ pal_prec_data, BDW_10BIT_GAMMA_MAX_VALS);
+ word = GAMMA_MODE_MODE_10BIT;
+ break;
+
+ default:
+ DRM_ERROR("Invalid number of samples\n");
+ return -EINVAL;
+ }
+
+ /* Set gamma mode on pipe control reg */
+ mode = I915_READ(GAMMA_MODE(pipe));
+ mode &= ~GAMMA_MODE_MODE_MASK;
+ I915_WRITE(GAMMA_MODE(pipe), mode | word);
+ DRM_DEBUG_DRIVER("Gamma applied on pipe %c\n",
+ pipe_name(pipe));
+ return 0;
+}
+
+static int bdw_set_degamma(struct drm_device *dev,
+ struct drm_property_blob *blob, struct drm_crtc *crtc)
+{
+ enum pipe pipe;
+ int num_samples;
+ u32 index, mode;
+ i915_reg_t pal_prec_index, pal_prec_data;
+ struct drm_palette *degamma_data;
+ struct drm_crtc_state *state = crtc->state;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct drm_r32g32b32 *correction_values = NULL;
+
+ if (WARN_ON(!blob))
+ return -EINVAL;
+
+ degamma_data = (struct drm_palette *)blob->data;
+ pipe = to_intel_crtc(crtc)->pipe;
+ num_samples = blob->length / sizeof(struct drm_r32g32b32);
+
+ switch (num_samples) {
+ case GAMMA_DISABLE_VALS:
+ /* Disable degamma on Pipe */
+ mode = I915_READ(GAMMA_MODE(pipe)) & ~GAMMA_MODE_MODE_MASK;
+ I915_WRITE(GAMMA_MODE(pipe), mode | GAMMA_MODE_MODE_8BIT);
+
+ state->palette_before_ctm_blob = NULL;
+ DRM_DEBUG_DRIVER("Disabling degamma on Pipe %c\n",
+ pipe_name(pipe));
+ break;
+
+ case BDW_SPLITGAMMA_MAX_VALS:
+ pal_prec_index = _MMIO(_PREC_PAL_INDEX(pipe));
+ pal_prec_data = _MMIO(_PREC_PAL_DATA(pipe));
+ correction_values = degamma_data->lut;
+
+ index = BDW_INDEX_AUTO_INCREMENT | BDW_INDEX_SPLIT_MODE;
+ I915_WRITE(pal_prec_index, index);
+
+ bdw_write_10bit_gamma_precision(dev,
+ correction_values,
+ pal_prec_data,
+ BDW_SPLITGAMMA_MAX_VALS);
+
+ /* Enable degamma on Pipe */
+ mode = I915_READ(GAMMA_MODE(pipe));
+ mode &= ~GAMMA_MODE_MODE_MASK;
+ I915_WRITE(GAMMA_MODE(pipe), mode | GAMMA_MODE_MODE_SPLIT);
+ DRM_DEBUG_DRIVER("degamma correction enabled on Pipe %c\n",
+ pipe_name(pipe));
+ break;
+
+ default:
+ DRM_ERROR("Invalid number of samples\n");
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static uint32_t bdw_prepare_csc_coeff(int64_t coeff)
+{
+ uint32_t reg_val, ls_bit_pos, exponent_bits, sign_bit = 0;
+ int32_t mantissa;
+ uint64_t abs_coeff;
+
+ coeff = min_t(int64_t, coeff, BDW_CSC_COEFF_MAX_VAL);
+ coeff = max_t(int64_t, coeff, BDW_CSC_COEFF_MIN_VAL);
+
+ abs_coeff = abs(coeff);
+ if (abs_coeff < (BDW_CSC_COEFF_UNITY_VAL >> 3)) {
+ /* abs_coeff < 0.125 */
+ exponent_bits = 3;
+ ls_bit_pos = 19;
+ } else if (abs_coeff >= (BDW_CSC_COEFF_UNITY_VAL >> 3) &&
+ abs_coeff < (BDW_CSC_COEFF_UNITY_VAL >> 2)) {
+ /* abs_coeff >= 0.125 && val < 0.25 */
+ exponent_bits = 2;
+ ls_bit_pos = 20;
+ } else if (abs_coeff >= (BDW_CSC_COEFF_UNITY_VAL >> 2)
+ && abs_coeff < (BDW_CSC_COEFF_UNITY_VAL >> 1)) {
+ /* abs_coeff >= 0.25 && val < 0.5 */
+ exponent_bits = 1;
+ ls_bit_pos = 21;
+ } else if (abs_coeff >= (BDW_CSC_COEFF_UNITY_VAL >> 1)
+ && abs_coeff < BDW_CSC_COEFF_UNITY_VAL) {
+ /* abs_coeff >= 0.5 && val < 1.0 */
+ exponent_bits = 0;
+ ls_bit_pos = 22;
+ } else if (abs_coeff >= BDW_CSC_COEFF_UNITY_VAL &&
+ abs_coeff < (BDW_CSC_COEFF_UNITY_VAL << 1)) {
+ /* abs_coeff >= 1.0 && val < 2.0 */
+ exponent_bits = 7;
+ ls_bit_pos = 23;
+ } else {
+ /* abs_coeff >= 2.0 && val < 4.0 */
+ exponent_bits = 6;
+ ls_bit_pos = 24;
+ }
+
+ mantissa = GET_BITS_ROUNDOFF(abs_coeff, ls_bit_pos, CSC_MAX_VALS);
+ if (coeff < 0)
+ sign_bit = 1;
+
+ reg_val = 0;
+ SET_BITS(reg_val, exponent_bits, 12, 3);
+ SET_BITS(reg_val, mantissa, 3, 9);
+ SET_BITS(reg_val, sign_bit, 15, 1);
+ return reg_val;
+}
+
+static int bdw_set_csc(struct drm_device *dev, struct drm_property_blob *blob,
+ struct drm_crtc *crtc)
+{
+ enum pipe pipe;
+ enum plane plane;
+ int temp, word;
+ int count = 0;
+ u32 plane_ctl, mode;
+ i915_reg_t reg;
+ struct drm_ctm *csc_data;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+
+ if (WARN_ON(!blob))
+ return -EINVAL;
+
+ if (blob->length != sizeof(struct drm_ctm)) {
+ DRM_ERROR("Invalid length of data received\n");
+ return -EINVAL;
+ }
+
+ csc_data = (struct drm_ctm *)blob->data;
+ pipe = to_intel_crtc(crtc)->pipe;
+ plane = to_intel_crtc(crtc)->plane;
+
+ plane_ctl = I915_READ(PLANE_CTL(pipe, plane));
+ plane_ctl |= PLANE_CTL_PIPE_CSC_ENABLE;
+ I915_WRITE(PLANE_CTL(pipe, plane), plane_ctl);
+ reg = _MMIO(_PIPE_CSC_COEFF(pipe));
+
+ /*
+ * BDW CSC correction coefficients are written like this:
+ * first two values go in a pair, into first register(0:15 and 16:31)
+ * third one alone goes into second register (16:31). Same
+ * pattern repeats for 3 times = 3 * 3 = 9 values.
+ */
+ while (count < CSC_MAX_VALS) {
+ word = 0;
+ temp = bdw_prepare_csc_coeff(csc_data->ctm_coeff[count++]);
+ SET_BITS(word, temp, 16, 16);
+
+ temp = bdw_prepare_csc_coeff(csc_data->ctm_coeff[count++]);
+ SET_BITS(word, temp, 0, 16);
+
+ I915_WRITE(reg, word);
+ reg.reg += 4;
+
+ word = 0;
+ temp = bdw_prepare_csc_coeff(csc_data->ctm_coeff[count++]);
+ SET_BITS(word, temp, 16, 16);
+ I915_WRITE(reg, word);
+ reg.reg += 4;
+ }
+
+ /* Enable CSC functionality */
+ mode = I915_READ(PIPE_CSC_MODE(pipe));
+ mode |= CSC_POSITION_BEFORE_GAMMA;
+ I915_WRITE(PIPE_CSC_MODE(pipe), mode);
+ DRM_DEBUG_DRIVER("CSC enabled on Pipe %c\n", pipe_name(pipe));
+ return 0;
+}
+
static u16 chv_prepare_csc_coeff(s64 csc_coeff)
{
u16 csc_s3_12_format = 0;
@@ -314,6 +759,8 @@ void intel_color_manager_commit(struct drm_device *dev,
/* Gamma correction is platform specific */
if (IS_CHERRYVIEW(dev))
ret = chv_set_gamma(dev, blob, crtc);
+ else if (IS_BROADWELL(dev) || IS_GEN9(dev))
+ ret = bdw_set_gamma(dev, blob, crtc);
if (ret)
DRM_ERROR("set Gamma correction failed\n");
@@ -326,6 +773,8 @@ void intel_color_manager_commit(struct drm_device *dev,
/* Degamma correction */
if (IS_CHERRYVIEW(dev))
ret = chv_set_degamma(dev, blob, crtc);
+ else if (IS_BROADWELL(dev) || IS_GEN9(dev))
+ ret = bdw_set_degamma(dev, blob, crtc);
if (ret)
DRM_ERROR("set degamma correction failed\n");
@@ -338,6 +787,8 @@ void intel_color_manager_commit(struct drm_device *dev,
/* CSC correction */
if (IS_CHERRYVIEW(dev))
ret = chv_set_csc(dev, blob, crtc);
+ else if (IS_BROADWELL(dev) || IS_GEN9(dev))
+ ret = bdw_set_csc(dev, blob, crtc);
if (ret)
DRM_ERROR("set CSC correction failed\n");
diff --git a/drivers/gpu/drm/i915/intel_color_manager.h b/drivers/gpu/drm/i915/intel_color_manager.h
index 04185ac..3ceec3d 100644
--- a/drivers/gpu/drm/i915/intel_color_manager.h
+++ b/drivers/gpu/drm/i915/intel_color_manager.h
@@ -89,3 +89,23 @@
#define CGM_GAMMA_EN (1 << 2)
#define CGM_CSC_EN (1 << 1)
#define CGM_DEGAMMA_EN (1 << 0)
+
+/* BDW CSC */
+/* 1.0000000 in S31.32 format */
+#define BDW_CSC_COEFF_UNITY_VAL 0x100000000
+/* 3.9921875 in S31.32 format */
+#define BDW_CSC_COEFF_MAX_VAL 0x3FE000000
+/*-4.000000 in S31.32 format */
+#define BDW_CSC_COEFF_MIN_VAL 0xFFFFFFFC00000000
+
+/* Gamma on BDW */
+#define BDW_SPLITGAMMA_MAX_VALS 512
+#define BDW_8BIT_GAMMA_MAX_VALS 256
+#define BDW_10BIT_GAMMA_MAX_VALS 1024
+#define BDW_12BIT_GAMMA_MAX_VALS 513
+#define BDW_MAX_GAMMA ((1 << 24) - 1)
+#define BDW_INDEX_AUTO_INCREMENT (1 << 15)
+#define BDW_INDEX_SPLIT_MODE (1 << 31)
+
+/* Degamma on BDW */
+#define BDW_DEGAMMA_MAX_VALS 512
--
2.6.3
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