From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
i965+ have an interpolate 10bit LUT mode. Let's expose that so
that we can actually enjoy real 10bpc.
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/i915_pci.c | 6 +++
drivers/gpu/drm/i915/i915_reg.h | 4 ++
drivers/gpu/drm/i915/intel_color.c | 62 +++++++++++++++++++++++++++++-
3 files changed, 71 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c
index 0971eee4a4d1..0c5258aa13bb 100644
--- a/drivers/gpu/drm/i915/i915_pci.c
+++ b/drivers/gpu/drm/i915/i915_pci.c
@@ -116,6 +116,10 @@
[PIPE_C] = IVB_CURSOR_C_OFFSET, \
}
+#define I965_COLORS \
+ .color = { .gamma_lut_size = 129, \
+ .gamma_lut_tests = DRM_COLOR_LUT_NON_DECREASING, \
+ }
#define ILK_COLORS \
.color = { .gamma_lut_size = 1024 }
#define IVB_COLORS \
@@ -278,6 +282,7 @@ static const struct intel_device_info intel_pineview_info = {
.has_coherent_ggtt = true, \
I9XX_PIPE_OFFSETS, \
I9XX_CURSOR_OFFSETS, \
+ I965_COLORS, \
GEN_DEFAULT_PAGE_SIZES
static const struct intel_device_info intel_i965g_info = {
@@ -462,6 +467,7 @@ static const struct intel_device_info intel_valleyview_info = {
.display_mmio_offset = VLV_DISPLAY_BASE,
I9XX_PIPE_OFFSETS,
I9XX_CURSOR_OFFSETS,
+ I965_COLORS,
GEN_DEFAULT_PAGE_SIZES,
};
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index f6a5d8f11368..0437a3ab6cdc 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -5795,6 +5795,10 @@ enum {
#define PIPEFRAMEPIXEL(pipe) _MMIO_PIPE2(pipe, _PIPEAFRAMEPIXEL)
#define PIPESTAT(pipe) _MMIO_PIPE2(pipe, _PIPEASTAT)
+#define _PIPEAGCMAX 0x70010
+#define _PIPEBGCMAX 0x71010
+#define PIPEGCMAX(pipe, i) _MMIO_PIPE2(pipe, _PIPEAGCMAX + (i) * 4)
+
#define _PIPE_MISC_A 0x70030
#define _PIPE_MISC_B 0x71030
#define PIPEMISC_YUV420_ENABLE (1 << 27)
diff --git a/drivers/gpu/drm/i915/intel_color.c b/drivers/gpu/drm/i915/intel_color.c
index 8e03f066adf7..07d62c7cb386 100644
--- a/drivers/gpu/drm/i915/intel_color.c
+++ b/drivers/gpu/drm/i915/intel_color.c
@@ -359,6 +359,22 @@ static void cherryview_load_csc_matrix(const struct intel_crtc_state *crtc_state
I915_WRITE(CGM_PIPE_MODE(pipe), crtc_state->cgm_mode);
}
+/* i965+ "10.6" bit interpolated format "even DW" (low 8 bits) */
+static u32 i965_lut_10p6_ldw(const struct drm_color_lut *color)
+{
+ return (color->red & 0xff) << 16 |
+ (color->green & 0xff) << 8 |
+ (color->blue & 0xff);
+}
+
+/* i965+ "10.6" interpolated format "odd DW" (high 8 bits) */
+static u32 i965_lut_10p6_udw(const struct drm_color_lut *color)
+{
+ return (color->red >> 8) << 16 |
+ (color->green >> 8) << 8 |
+ (color->blue >> 8);
+}
+
static u32 ilk_lut_10(const struct drm_color_lut *color)
{
return drm_color_lut_extract(color->red, 10) << 20 |
@@ -468,6 +484,37 @@ static void skl_color_commit(const struct intel_crtc_state *crtc_state)
ilk_load_csc_matrix(crtc_state);
}
+static void i965_load_lut_10p6(struct intel_crtc *crtc,
+ const struct drm_property_blob *blob)
+{
+ struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+ const struct drm_color_lut *lut = blob->data;
+ int i, lut_size = drm_color_lut_size(blob);
+ enum pipe pipe = crtc->pipe;
+
+ for (i = 0; i < lut_size - 1; i++) {
+ I915_WRITE_FW(PALETTE(pipe, 2 * i + 0),
+ i965_lut_10p6_ldw(&lut[i]));
+ I915_WRITE_FW(PALETTE(pipe, 2 * i + 1),
+ i965_lut_10p6_udw(&lut[i]));
+ }
+
+ I915_WRITE_FW(PIPEGCMAX(pipe, 0), lut[i].red);
+ I915_WRITE_FW(PIPEGCMAX(pipe, 1), lut[i].green);
+ I915_WRITE_FW(PIPEGCMAX(pipe, 2), lut[i].blue);
+}
+
+static void i965_load_luts(const struct intel_crtc_state *crtc_state)
+{
+ struct intel_crtc *crtc = to_intel_crtc(crtc_state->base.crtc);
+ const struct drm_property_blob *gamma_lut = crtc_state->base.gamma_lut;
+
+ if (crtc_state->gamma_mode == GAMMA_MODE_MODE_8BIT)
+ i9xx_load_luts(crtc_state);
+ else
+ i965_load_lut_10p6(crtc, gamma_lut);
+}
+
static void ilk_load_lut_10(struct intel_crtc *crtc,
const struct drm_property_blob *blob)
{
@@ -911,6 +958,15 @@ static int check_luts(const struct intel_crtc_state *crtc_state)
return 0;
}
+static u32 i9xx_gamma_mode(struct intel_crtc_state *crtc_state)
+{
+ if (!crtc_state->gamma_enable ||
+ crtc_state_is_legacy_gamma(crtc_state))
+ return GAMMA_MODE_MODE_8BIT;
+ else
+ return GAMMA_MODE_MODE_10BIT; /* i965+ only */
+}
+
static int i9xx_color_check(struct intel_crtc_state *crtc_state)
{
int ret;
@@ -923,7 +979,7 @@ static int i9xx_color_check(struct intel_crtc_state *crtc_state)
crtc_state->base.gamma_lut &&
!crtc_state->c8_planes;
- crtc_state->gamma_mode = GAMMA_MODE_MODE_8BIT;
+ crtc_state->gamma_mode = i9xx_gamma_mode(crtc_state);
ret = intel_color_add_affected_planes(crtc_state);
if (ret)
@@ -1178,6 +1234,10 @@ void intel_color_init(struct intel_crtc *crtc)
dev_priv->display.color_check = chv_color_check;
dev_priv->display.color_commit = i9xx_color_commit;
dev_priv->display.load_luts = cherryview_load_luts;
+ } else if (INTEL_GEN(dev_priv) >= 4) {
+ dev_priv->display.color_check = i9xx_color_check;
+ dev_priv->display.color_commit = i9xx_color_commit;
+ dev_priv->display.load_luts = i965_load_luts;
} else {
dev_priv->display.color_check = i9xx_color_check;
dev_priv->display.color_commit = i9xx_color_commit;
--
2.19.2
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