For icl+, have hw read out to create hw blob of gamma
lut values. icl+ platforms supports multi segmented gamma
mode, add hw lut creation for this mode.
This will be used to validate gamma programming using dsb
(display state buffer) which is a tgl feature.
v2: -readout code for multisegmented gamma has to come
up with some intermediate entries that aren't preserved
in hardware (Jani N)
-linear interpolation (Ville)
-moved common code to check gamma_enable to specific funcs,
since icl doesn't support that
Signed-off-by: Swati Sharma <swati2.sharma@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_color.c | 243 ++++++++++++++++++++++++++---
drivers/gpu/drm/i915/i915_reg.h | 7 +
2 files changed, 230 insertions(+), 20 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_color.c b/drivers/gpu/drm/i915/display/intel_color.c
index b1f0f7e..0008011 100644
--- a/drivers/gpu/drm/i915/display/intel_color.c
+++ b/drivers/gpu/drm/i915/display/intel_color.c
@@ -1370,6 +1370,9 @@ static int icl_color_check(struct intel_crtc_state *crtc_state)
static int i9xx_gamma_precision(const struct intel_crtc_state *crtc_state)
{
+ if (!crtc_state->gamma_enable)
+ return 0;
+
switch (crtc_state->gamma_mode) {
case GAMMA_MODE_MODE_8BIT:
return 8;
@@ -1383,6 +1386,9 @@ static int i9xx_gamma_precision(const struct intel_crtc_state *crtc_state)
static int ilk_gamma_precision(const struct intel_crtc_state *crtc_state)
{
+ if (!crtc_state->gamma_enable)
+ return 0;
+
if ((crtc_state->csc_mode & CSC_POSITION_BEFORE_GAMMA) == 0)
return 0;
@@ -1399,6 +1405,9 @@ static int ilk_gamma_precision(const struct intel_crtc_state *crtc_state)
static int chv_gamma_precision(const struct intel_crtc_state *crtc_state)
{
+ if (!crtc_state->gamma_enable)
+ return 0;
+
if (crtc_state->cgm_mode & CGM_PIPE_MODE_GAMMA)
return 10;
else
@@ -1407,6 +1416,9 @@ static int chv_gamma_precision(const struct intel_crtc_state *crtc_state)
static int glk_gamma_precision(const struct intel_crtc_state *crtc_state)
{
+ if (!crtc_state->gamma_enable)
+ return 0;
+
switch (crtc_state->gamma_mode) {
case GAMMA_MODE_MODE_8BIT:
return 8;
@@ -1418,21 +1430,39 @@ static int glk_gamma_precision(const struct intel_crtc_state *crtc_state)
}
}
+static int icl_gamma_precision(const struct intel_crtc_state *crtc_state)
+{
+ if ((crtc_state->gamma_mode & POST_CSC_GAMMA_ENABLE) == 0)
+ return 0;
+
+ switch (crtc_state->gamma_mode & GAMMA_MODE_MODE_MASK) {
+ case GAMMA_MODE_MODE_8BIT:
+ return 8;
+ case GAMMA_MODE_MODE_10BIT:
+ return 10;
+ case GAMMA_MODE_MODE_12BIT_MULTI_SEGMENTED:
+ return 16;
+ default:
+ MISSING_CASE(crtc_state->gamma_mode);
+ return 0;
+ }
+
+}
+
int intel_color_get_gamma_bit_precision(const struct intel_crtc_state *crtc_state)
{
struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
- if (!crtc_state->gamma_enable)
- return 0;
-
if (HAS_GMCH(dev_priv)) {
if (IS_CHERRYVIEW(dev_priv))
return chv_gamma_precision(crtc_state);
else
return i9xx_gamma_precision(crtc_state);
} else {
- if (IS_CANNONLAKE(dev_priv) || IS_GEMINILAKE(dev_priv))
+ if (INTEL_GEN(dev_priv) >= 11)
+ return icl_gamma_precision(crtc_state);
+ else if (IS_CANNONLAKE(dev_priv) || IS_GEMINILAKE(dev_priv))
return glk_gamma_precision(crtc_state);
else if (IS_IRONLAKE(dev_priv))
return ilk_gamma_precision(crtc_state);
@@ -1463,6 +1493,30 @@ static bool intel_color_lut_entry_equal(struct drm_color_lut *lut1,
return true;
}
+static bool intel_color_lut_entry_multi_equal(struct drm_color_lut *lut1,
+ struct drm_color_lut *lut2,
+ int lut_size, u32 err)
+{
+ int i;
+
+ for (i = 0; i < 9; i++) {
+ if (!err_check(&lut1[i], &lut2[i], err))
+ return false;
+ }
+
+ for (i = 1; i < 257; i++) {
+ if (!err_check(&lut1[i * 8], &lut2[i * 8], err))
+ return false;
+ }
+
+ for (i = 0; i < 256; i++) {
+ if (!err_check(&lut1[i * 8 * 128], &lut2[i * 8 * 128], err))
+ return false;
+ }
+
+ return true;
+}
+
bool intel_color_lut_equal(struct drm_property_blob *blob1,
struct drm_property_blob *blob2,
u32 gamma_mode, u32 bit_precision)
@@ -1481,16 +1535,8 @@ bool intel_color_lut_equal(struct drm_property_blob *blob1,
lut_size2 = drm_color_lut_size(blob2);
/* check sw and hw lut size */
- switch (gamma_mode) {
- case GAMMA_MODE_MODE_8BIT:
- case GAMMA_MODE_MODE_10BIT:
- if (lut_size1 != lut_size2)
- return false;
- break;
- default:
- MISSING_CASE(gamma_mode);
- return false;
- }
+ if (lut_size1 != lut_size2)
+ return false;
lut1 = blob1->data;
lut2 = blob2->data;
@@ -1498,13 +1544,18 @@ bool intel_color_lut_equal(struct drm_property_blob *blob1,
err = 0xffff >> bit_precision;
/* check sw and hw lut entry to be equal */
- switch (gamma_mode) {
+ switch (gamma_mode & GAMMA_MODE_MODE_MASK) {
case GAMMA_MODE_MODE_8BIT:
case GAMMA_MODE_MODE_10BIT:
if (!intel_color_lut_entry_equal(lut1, lut2,
lut_size2, err))
return false;
break;
+ case GAMMA_MODE_MODE_12BIT_MULTI_SEGMENTED:
+ if (!intel_color_lut_entry_multi_equal(lut1, lut2,
+ lut_size2, err))
+ return false;
+ break;
default:
MISSING_CASE(gamma_mode);
return false;
@@ -1744,6 +1795,157 @@ static void glk_read_luts(struct intel_crtc_state *crtc_state)
crtc_state->base.gamma_lut = glk_read_lut_10(crtc_state, PAL_PREC_INDEX_VALUE(0));
}
+static struct drm_color_lut *
+icl_compute_interpolated_gamma_blob(struct drm_color_lut *tmp_lut,
+ struct drm_color_lut *lut, u32 lut_size)
+{
+ __u16 a_red, b_red, a_green, b_green, a_blue, b_blue;
+ __u16 red_step, green_step, blue_step;
+ int i, j, k, m, n;
+
+ for (i = 0, k = 0; k < 9; i++, k++) {
+ lut[i].red = tmp_lut[k].red;
+ lut[i].green = tmp_lut[k].green;
+ lut[i].blue = tmp_lut[k].blue;
+ }
+
+ for (k = 9; k < 264; k++) {
+ a_red = tmp_lut[k].red;
+ b_red = tmp_lut[k + 1].red;
+ red_step = (b_red - a_red) / 8;
+
+ a_green = tmp_lut[k].green;
+ b_green = tmp_lut[k + 1].green;
+ green_step = (b_green - a_green) / 8;
+
+ a_blue = tmp_lut[k].blue;
+ b_blue = tmp_lut[k + 1].blue;
+ blue_step = (b_blue - a_blue) / 8;
+
+ for (j = 0; j < 8; j++) {
+ lut[i].red = lut[i - 1].red + red_step;
+ lut[i].green = lut[i - 1].green + green_step;
+ lut[i].blue = lut[i - 1].blue + blue_step;
+
+ i++;
+ }
+ }
+
+ for (k = 265; k < 521; k++) {
+ a_red = tmp_lut[k].red;
+ b_red = tmp_lut[k + 1].red;
+ red_step = ((b_red - a_red) / 127) / 8;
+
+ a_green = tmp_lut[k].green;
+ b_green = tmp_lut[k + 1].green;
+ green_step = ((b_green - a_green) / 127) / 8;
+
+ a_blue = tmp_lut[k].blue;
+ b_blue = tmp_lut[k + 1].blue;
+ blue_step = ((b_blue - a_blue) / 127) / 8;
+
+ for (m = 0; m < 127; m++) {
+ for (n = 0; n < 8; n++) {
+ lut[i].red = lut[i - 1].red + red_step;
+ lut[i].green = lut[i - 1].green + green_step;
+ lut[i].blue = lut[i - 1].blue + blue_step;
+
+ i++;
+ }
+ }
+ }
+
+ return lut;
+}
+
+static struct drm_property_blob *
+icl_read_lut_multi_seg(const struct intel_crtc_state *crtc_state)
+{
+ struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+ struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+ int lut_size = INTEL_INFO(dev_priv)->color.gamma_lut_size;
+ int tmp_lut_size = 522;
+ enum pipe pipe = crtc->pipe;
+ struct drm_property_blob *blob, *tmp_blob;
+ struct drm_color_lut *blob_data, *tmp_blob_data;
+ u32 i, val1, val2;
+
+ blob = drm_property_create_blob(&dev_priv->drm,
+ sizeof(struct drm_color_lut) * lut_size,
+ NULL);
+ tmp_blob = drm_property_create_blob(&dev_priv->drm,
+ sizeof(struct drm_color_lut) * tmp_lut_size,
+ NULL);
+ if (IS_ERR(blob) || IS_ERR(tmp_blob))
+ return NULL;
+
+ blob_data = blob->data;
+ tmp_blob_data = tmp_blob->data;
+
+ I915_WRITE(PREC_PAL_MULTI_SEG_INDEX(pipe), PAL_PREC_AUTO_INCREMENT);
+
+ for (i = 0; i < 9; i++) {
+ val1 = I915_READ(PREC_PAL_MULTI_SEG_DATA(pipe));
+ val2 = I915_READ(PREC_PAL_MULTI_SEG_DATA(pipe));
+
+ tmp_blob_data[i].red = REG_FIELD_GET(PAL_PREC_MULTI_SEG_RED_UDW_MASK, val2) << 6 |
+ REG_FIELD_GET(PAL_PREC_MULTI_SEG_RED_LDW_MASK, val1);
+ tmp_blob_data[i].green = REG_FIELD_GET(PAL_PREC_MULTI_SEG_GREEN_UDW_MASK, val2) << 6 |
+ REG_FIELD_GET(PAL_PREC_MULTI_SEG_GREEN_LDW_MASK, val1);
+ tmp_blob_data[i].blue = REG_FIELD_GET(PAL_PREC_MULTI_SEG_BLUE_UDW_MASK, val2) << 6 |
+ REG_FIELD_GET(PAL_PREC_MULTI_SEG_BLUE_LDW_MASK, val1);
+ }
+
+ I915_WRITE(PREC_PAL_INDEX(pipe), PAL_PREC_AUTO_INCREMENT);
+
+ for (i = 1; i < 257; i++) {
+ val1 = I915_READ(PREC_PAL_DATA(pipe));
+ val2 = I915_READ(PREC_PAL_DATA(pipe));
+
+ tmp_blob_data[i + 8].red = REG_FIELD_GET(PAL_PREC_MULTI_SEG_RED_UDW_MASK, val2) << 6 |
+ REG_FIELD_GET(PAL_PREC_MULTI_SEG_RED_LDW_MASK, val1);
+ tmp_blob_data[i + 8].green = REG_FIELD_GET(PAL_PREC_MULTI_SEG_GREEN_UDW_MASK, val2) << 6 |
+ REG_FIELD_GET(PAL_PREC_MULTI_SEG_GREEN_LDW_MASK, val1);
+ tmp_blob_data[i + 8].blue = REG_FIELD_GET(PAL_PREC_MULTI_SEG_BLUE_UDW_MASK, val2) << 6 |
+ REG_FIELD_GET(PAL_PREC_MULTI_SEG_BLUE_LDW_MASK, val1);
+ }
+
+ for (i = 0; i < 256; i++) {
+ val1 = I915_READ(PREC_PAL_DATA(pipe));
+ val2 = I915_READ(PREC_PAL_DATA(pipe));
+
+ tmp_blob_data[i + 265].red = REG_FIELD_GET(PAL_PREC_MULTI_SEG_RED_UDW_MASK, val2) << 6 |
+ REG_FIELD_GET(PAL_PREC_MULTI_SEG_RED_LDW_MASK, val1);
+ tmp_blob_data[i + 265].green = REG_FIELD_GET(PAL_PREC_MULTI_SEG_GREEN_UDW_MASK, val2) << 6 |
+ REG_FIELD_GET(PAL_PREC_MULTI_SEG_GREEN_LDW_MASK, val1);
+ tmp_blob_data[i + 265].blue = REG_FIELD_GET(PAL_PREC_MULTI_SEG_BLUE_UDW_MASK, val2) << 6 |
+ REG_FIELD_GET(PAL_PREC_MULTI_SEG_BLUE_LDW_MASK, val1);
+ }
+
+ tmp_blob_data[521].red = REG_FIELD_GET(PREC_PAL_GC_MAX_RGB_MASK,
+ I915_READ(PREC_PAL_GC_MAX(pipe, 0)));
+ tmp_blob_data[521].green = REG_FIELD_GET(PREC_PAL_GC_MAX_RGB_MASK,
+ I915_READ(PREC_PAL_GC_MAX(pipe, 1)));
+ tmp_blob_data[521].blue = REG_FIELD_GET(PREC_PAL_GC_MAX_RGB_MASK,
+ I915_READ(PREC_PAL_GC_MAX(pipe, 1)));
+
+ blob_data = icl_compute_interpolated_gamma_blob(tmp_blob_data, blob_data, lut_size);
+
+ return blob;
+}
+
+static void icl_read_luts(struct intel_crtc_state *crtc_state)
+{
+ if ((crtc_state->gamma_mode & GAMMA_MODE_MODE_MASK) ==
+ GAMMA_MODE_MODE_8BIT)
+ crtc_state->base.gamma_lut = i9xx_read_lut_8(crtc_state);
+ else if ((crtc_state->gamma_mode & GAMMA_MODE_MODE_MASK) ==
+ GAMMA_MODE_MODE_12BIT_MULTI_SEGMENTED)
+ crtc_state->base.gamma_lut = icl_read_lut_multi_seg(crtc_state);
+ else
+ crtc_state->base.gamma_lut = glk_read_lut_10(crtc_state, PAL_PREC_INDEX_VALUE(0));
+}
+
void intel_color_init(struct intel_crtc *crtc)
{
struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
@@ -1785,16 +1987,17 @@ void intel_color_init(struct intel_crtc *crtc)
else
dev_priv->display.color_commit = ilk_color_commit;
- if (INTEL_GEN(dev_priv) >= 11)
+ if (INTEL_GEN(dev_priv) >= 11) {
dev_priv->display.load_luts = icl_load_luts;
- else if (IS_CANNONLAKE(dev_priv) || IS_GEMINILAKE(dev_priv)) {
+ dev_priv->display.read_luts = icl_read_luts;
+ } else if (IS_CANNONLAKE(dev_priv) || IS_GEMINILAKE(dev_priv)) {
dev_priv->display.load_luts = glk_load_luts;
dev_priv->display.read_luts = glk_read_luts;
- } else if (INTEL_GEN(dev_priv) >= 8)
+ } else if (INTEL_GEN(dev_priv) >= 8) {
dev_priv->display.load_luts = bdw_load_luts;
- else if (INTEL_GEN(dev_priv) >= 7)
+ } else if (INTEL_GEN(dev_priv) >= 7) {
dev_priv->display.load_luts = ivb_load_luts;
- else {
+ } else {
dev_priv->display.load_luts = ilk_load_luts;
dev_priv->display.read_luts = ilk_read_luts;
}
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index bf37ece..844dd62 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -10378,6 +10378,7 @@ enum skl_power_gate {
#define PREC_PAL_INDEX(pipe) _MMIO_PIPE(pipe, _PAL_PREC_INDEX_A, _PAL_PREC_INDEX_B)
#define PREC_PAL_DATA(pipe) _MMIO_PIPE(pipe, _PAL_PREC_DATA_A, _PAL_PREC_DATA_B)
+#define PREC_PAL_GC_MAX_RGB_MASK REG_GENMASK(15, 0)
#define PREC_PAL_GC_MAX(pipe, i) _MMIO(_PIPE(pipe, _PAL_PREC_GC_MAX_A, _PAL_PREC_GC_MAX_B) + (i) * 4)
#define PREC_PAL_EXT_GC_MAX(pipe, i) _MMIO(_PIPE(pipe, _PAL_PREC_EXT_GC_MAX_A, _PAL_PREC_EXT_GC_MAX_B) + (i) * 4)
#define PREC_PAL_EXT2_GC_MAX(pipe, i) _MMIO(_PIPE(pipe, _PAL_PREC_EXT2_GC_MAX_A, _PAL_PREC_EXT2_GC_MAX_B) + (i) * 4)
@@ -10401,6 +10402,12 @@ enum skl_power_gate {
#define _PAL_PREC_MULTI_SEG_DATA_A 0x4A40C
#define _PAL_PREC_MULTI_SEG_DATA_B 0x4AC0C
+#define PAL_PREC_MULTI_SEG_RED_LDW_MASK REG_GENMASK(29, 24)
+#define PAL_PREC_MULTI_SEG_RED_UDW_MASK REG_GENMASK(29, 20)
+#define PAL_PREC_MULTI_SEG_GREEN_LDW_MASK REG_GENMASK(19, 14)
+#define PAL_PREC_MULTI_SEG_GREEN_UDW_MASK REG_GENMASK(19, 10)
+#define PAL_PREC_MULTI_SEG_BLUE_LDW_MASK REG_GENMASK(9, 4)
+#define PAL_PREC_MULTI_SEG_BLUE_UDW_MASK REG_GENMASK(9, 0)
#define PREC_PAL_MULTI_SEG_INDEX(pipe) _MMIO_PIPE(pipe, \
_PAL_PREC_MULTI_SEG_INDEX_A, \
--
1.9.1
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