XE_LPD hardware introduced a new gamma mode i.e, Logarithmic
gamma mode. Added support for the same.
Signed-off-by: Uma Shankar <uma.shankar@xxxxxxxxx>
Signed-off-by: Bhanuprakash Modem <bhanuprakash.modem@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_color.c | 111 ++++++++++++++++++++-
drivers/gpu/drm/i915/i915_reg.h | 1 +
include/drm/drm_crtc.h | 3 +
3 files changed, 110 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_color.c b/drivers/gpu/drm/i915/display/intel_color.c
index 0b59d8a89761..12cacd3aeead 100644
--- a/drivers/gpu/drm/i915/display/intel_color.c
+++ b/drivers/gpu/drm/i915/display/intel_color.c
@@ -75,6 +75,21 @@
#define ILK_CSC_POSTOFF_LIMITED_RANGE (16 * (1 << 12) / 255)
+#define GAMMA_MODE_LEGACY_PALETTE_8BIT BIT(0)
+#define GAMMA_MODE_PRECISION_PALETTE_10BIT BIT(1)
+#define GAMMA_MODE_INTERPOLATED_12BIT BIT(2)
+#define GAMMA_MODE_MULTI_SEGMENTED_12BIT BIT(3)
+#define GAMMA_MODE_SPLIT_12BIT BIT(4)
+#define GAMMA_MODE_LOGARITHMIC_12BIT BIT(5) /* D13+ */
+
+#define INTEL_GAMMA_MODE_MASK (\
+ GAMMA_MODE_LEGACY_PALETTE_8BIT | \
+ GAMMA_MODE_PRECISION_PALETTE_10BIT | \
+ GAMMA_MODE_INTERPOLATED_12BIT | \
+ GAMMA_MODE_MULTI_SEGMENTED_12BIT | \
+ GAMMA_MODE_SPLIT_12BIT \
+ GAMMA_MODE_LOGARITHMIC_12BIT)
+
/* Nop pre/post offsets */
static const u16 ilk_csc_off_zero[3] = {};
@@ -929,12 +944,20 @@ icl_load_gcmax(const struct intel_crtc_state *crtc_state,
const struct drm_color_lut *color)
{
struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+ struct drm_i915_private *i915 = to_i915(crtc_state->uapi.crtc->dev);
enum pipe pipe = crtc->pipe;
- /* FIXME LUT entries are 16 bit only, so we can prog 0xFFFF max */
- intel_dsb_reg_write(crtc_state, PREC_PAL_GC_MAX(pipe, 0), color->red);
- intel_dsb_reg_write(crtc_state, PREC_PAL_GC_MAX(pipe, 1), color->green);
- intel_dsb_reg_write(crtc_state, PREC_PAL_GC_MAX(pipe, 2), color->blue);
+ if (DISPLAY_VER(i915) >= 13) {
+ /* MAx val from UAPI is 16bit only, so setting fixed for GC max */
+ intel_dsb_reg_write(crtc_state, PREC_PAL_GC_MAX(pipe, 0), 1 << 16);
+ intel_dsb_reg_write(crtc_state, PREC_PAL_GC_MAX(pipe, 1), 1 << 16);
+ intel_dsb_reg_write(crtc_state, PREC_PAL_GC_MAX(pipe, 2), 1 << 16);
+ } else {
+ /* FIXME LUT entries are 16 bit only, so we can prog 0xFFFF max */
+ intel_dsb_reg_write(crtc_state, PREC_PAL_GC_MAX(pipe, 0), color->red);
+ intel_dsb_reg_write(crtc_state, PREC_PAL_GC_MAX(pipe, 1), color->green);
+ intel_dsb_reg_write(crtc_state, PREC_PAL_GC_MAX(pipe, 2), color->blue);
+ }
}
static void
@@ -1585,6 +1608,9 @@ static u32 icl_gamma_mode(const struct intel_crtc_state *crtc_state)
if (!crtc_state->hw.gamma_lut ||
crtc_state_is_legacy_gamma(crtc_state))
gamma_mode |= GAMMA_MODE_MODE_8BIT;
+ else if (crtc_state->uapi.gamma_mode_type ==
+ GAMMA_MODE_LOGARITHMIC_12BIT)
+ gamma_mode |= GAMMA_MODE_MODE_12BIT_LOGARITHMIC;
else
gamma_mode |= GAMMA_MODE_MODE_12BIT_MULTI_SEGMENTED;
@@ -1607,12 +1633,33 @@ static u32 icl_csc_mode(const struct intel_crtc_state *crtc_state)
static int icl_color_check(struct intel_crtc_state *crtc_state)
{
+ struct drm_device *dev = crtc_state->uapi.crtc->dev;
+ struct drm_i915_private *dev_priv = to_i915(dev);
+ struct drm_property *property = crtc_state->uapi.crtc->gamma_mode_property;
+ struct drm_property_enum *prop_enum;
+ u32 index = 0;
int ret;
ret = check_luts(crtc_state);
if (ret)
return ret;
+ if (DISPLAY_VER(dev_priv) >= 13) {
+ list_for_each_entry(prop_enum, &property->enum_list, head) {
+ if (prop_enum->value == crtc_state->uapi.gamma_mode) {
+ if (!strcmp(prop_enum->name,
+ "logarithmic gamma")) {
+ crtc_state->uapi.gamma_mode_type =
+ GAMMA_MODE_LOGARITHMIC_12BIT;
+ drm_dbg_kms(dev,
+ "logarithmic gamma enabled\n");
+ }
+ break;
+ }
+ index++;
+ }
+ }
+
crtc_state->gamma_mode = icl_gamma_mode(crtc_state);
crtc_state->csc_mode = icl_csc_mode(crtc_state);
@@ -2325,6 +2372,58 @@ static const struct drm_color_lut_range d13_logarithmic_gamma[] = {
},
};
+static void
+d13_program_logarithmic_gamma_lut(const struct intel_crtc_state *crtc_state)
+{
+ struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+ struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+ const struct drm_property_blob *blob = crtc_state->hw.gamma_lut;
+ const u32 lut_size = INTEL_INFO(dev_priv)->color.gamma_lut_size;
+ const struct drm_color_lut *lut;
+ enum pipe pipe = crtc->pipe;
+ u32 i;
+
+ if (!blob || !blob->data)
+ return;
+
+ lut = blob->data;
+ intel_dsb_reg_write(crtc_state, PREC_PAL_INDEX(pipe),
+ PAL_PREC_AUTO_INCREMENT);
+
+ for (i = 0; i < lut_size - 3; i++) {
+ intel_dsb_indexed_reg_write(crtc_state, PREC_PAL_DATA(pipe),
+ ilk_lut_12p4_ldw(&lut[i]));
+ intel_dsb_indexed_reg_write(crtc_state, PREC_PAL_DATA(pipe),
+ ilk_lut_12p4_udw(&lut[i]));
+ }
+
+ icl_load_gcmax(crtc_state, &lut[i]);
+ ivb_load_lut_ext_max(crtc_state);
+}
+
+static void d13_load_luts(const struct intel_crtc_state *crtc_state)
+{
+ const struct drm_property_blob *gamma_lut = crtc_state->hw.gamma_lut;
+ struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+
+ if (crtc_state->hw.degamma_lut)
+ glk_load_degamma_lut(crtc_state);
+
+ switch (crtc_state->gamma_mode & GAMMA_MODE_MODE_MASK) {
+ case GAMMA_MODE_MODE_8BIT:
+ ilk_load_lut_8(crtc, gamma_lut);
+ break;
+ case GAMMA_MODE_MODE_12BIT_LOGARITHMIC:
+ d13_program_logarithmic_gamma_lut(crtc_state);
+ break;
+ default:
+ bdw_load_lut_10(crtc, gamma_lut, PAL_PREC_INDEX_VALUE(0));
+ ivb_load_lut_ext_max(crtc_state);
+ }
+
+ intel_dsb_commit(crtc_state);
+}
+
void intel_color_init(struct intel_crtc *crtc)
{
struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
@@ -2376,7 +2475,9 @@ void intel_color_init(struct intel_crtc *crtc)
else
dev_priv->display.color_commit = ilk_color_commit;
- if (DISPLAY_VER(dev_priv) >= 11) {
+ if (DISPLAY_VER(dev_priv) >= 13) {
+ dev_priv->display.load_luts = d13_load_luts;
+ } else if (DISPLAY_VER(dev_priv) >= 11) {
dev_priv->display.load_luts = icl_load_luts;
dev_priv->display.read_luts = icl_read_luts;
} else if (DISPLAY_VER(dev_priv) == 10) {
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 24307c49085f..957f97edf035 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -7749,6 +7749,7 @@ enum {
#define GAMMA_MODE_MODE_12BIT (2 << 0)
#define GAMMA_MODE_MODE_SPLIT (3 << 0) /* ivb-bdw */
#define GAMMA_MODE_MODE_12BIT_MULTI_SEGMENTED (3 << 0) /* icl + */
+#define GAMMA_MODE_MODE_12BIT_LOGARITHMIC (3 << 0) /* D13+ + */
/* DMC */
#define DMC_PROGRAM(i) _MMIO(0x80000 + (i) * 4)
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index b1eead03ebe8..5a594f134a81 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -269,6 +269,9 @@ struct drm_crtc_state {
*/
u32 gamma_mode;
+ /** Gamma mode type programmed on the pipe */
+ u32 gamma_mode_type;
+
/**
* @degamma_lut:
*
--
2.26.2
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