[PATCH 4/5] drm/i915/display: Add registers and compute the strength
Nemesa Garg
nemesa.garg at intel.com
Fri Jul 5 09:02:04 UTC 2024
Add new registers and related bits. Compute the strength
value and tap value based on display mode.
Signed-off-by: Nemesa Garg <nemesa.garg at intel.com>
---
drivers/gpu/drm/i915/display/intel_display.c | 5 +-
.../drm/i915/display/intel_display_types.h | 1 +
.../drm/i915/display/intel_sharpen_filter.c | 105 ++++++++++++++++++
.../drm/i915/display/intel_sharpen_filter.h | 5 +
drivers/gpu/drm/i915/i915_reg.h | 17 +++
5 files changed, 132 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 53c871758848..4c734c557ea8 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -5963,7 +5963,10 @@ static int intel_atomic_check_planes(struct intel_atomic_state *state)
if (ret)
return ret;
- intel_sharpness_scaler_compute_config(new_crtc_state);
+ if (sharp_compute(new_crtc_state)) {
+ intel_sharpness_scaler_compute_config(new_crtc_state);
+ intel_filter_compute_config(new_crtc_state);
+ }
/*
* On some platforms the number of active planes affects
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index 4059d066f161..8ecc5daeed79 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -837,6 +837,7 @@ struct intel_sharpness_filter {
bool strength_changed;
u8 win_size;
bool need_scaler;
+ u8 strength;
};
struct intel_crtc_scaler_state {
diff --git a/drivers/gpu/drm/i915/display/intel_sharpen_filter.c b/drivers/gpu/drm/i915/display/intel_sharpen_filter.c
index 627a0dbd3dfd..6600a66d3960 100644
--- a/drivers/gpu/drm/i915/display/intel_sharpen_filter.c
+++ b/drivers/gpu/drm/i915/display/intel_sharpen_filter.c
@@ -18,11 +18,87 @@
#define FILTER_COEFF_1_0 1000
#define FILTER_COEFF_0_0 0
+/*
+ * Default LUT values to be loaded one time.
+ */
+static const u16 lut_data[] = {
+ 4095, 2047, 1364, 1022, 816, 678, 579,
+ 504, 444, 397, 357, 323, 293, 268, 244, 224,
+ 204, 187, 170, 154, 139, 125, 111, 98, 85,
+ 73, 60, 48, 36, 24, 12, 0
+};
+
+void intel_filter_lut_load(struct intel_crtc *crtc,
+ const struct intel_crtc_state *crtc_state)
+{
+ struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+ int i;
+
+ intel_de_write(dev_priv, SHRPLUT_INDEX(crtc->pipe), INDEX_AUTO_INCR | INDEX_VALUE(0));
+
+ for (i = 0; i < ARRAY_SIZE(lut_data); i++)
+ intel_de_write(dev_priv, SHRPLUT_DATA(crtc->pipe), lut_data[i]);
+}
+
+static void intel_filter_size_compute(struct intel_crtc_state *crtc_state)
+{
+ const struct drm_display_mode *mode = &crtc_state->hw.adjusted_mode;
+
+ if (mode->hdisplay <= 1920 && mode->vdisplay <= 1080)
+ crtc_state->hw.casf_params.win_size = 0;
+ else if (mode->hdisplay <= 3840 && mode->vdisplay <= 2160)
+ crtc_state->hw.casf_params.win_size = 1;
+ else
+ crtc_state->hw.casf_params.win_size = 2;
+}
+
+bool intel_sharpness_strength_changed(struct intel_atomic_state *state)
+{
+ int i;
+ struct intel_crtc_state *old_crtc_state, *new_crtc_state;
+ struct intel_crtc *crtc;
+
+ for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state,
+ new_crtc_state, i) {
+ if (new_crtc_state->uapi.sharpness_strength !=
+ old_crtc_state->uapi.sharpness_strength)
+ return true;
+ }
+
+ return false;
+}
+
void intel_sharpness_filter_enable(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);
int id = crtc_state->scaler_state.scaler_id;
+ u32 sharpness_ctl;
+ u8 val;
+
+ if (crtc_state->uapi.sharpness_strength == 0) {
+ intel_sharpness_disable(crtc_state);
+
+ return;
+ }
+
+ /*
+ * HW takes a value in form (1.0 + strength) in 4.4 fixed format.
+ * Strength is from 0.0-14.9375 ie from 0-239.
+ * User can give value from 0-255 but is clamped to 239.
+ * Ex. User gives 85 which is 5.3125 and adding 1.0 gives 6.3125.
+ * 6.3125 in 4.4 format is 01100101 which is equal to 101.
+ * Also 85 + 16 = 101.
+ */
+ val = min(crtc_state->uapi.sharpness_strength, 0xEF) + 0x10;
+
+ drm_dbg(&dev_priv->drm, "Filter strength value: %d\n", val);
+
+ sharpness_ctl = FILTER_EN | FILTER_STRENGTH(val) |
+ FILTER_SIZE(crtc_state->hw.casf_params.win_size);
+
+ intel_de_write(dev_priv, SHARPNESS_CTL(crtc->pipe),
+ sharpness_ctl);
intel_de_write_fw(dev_priv, GLK_PS_COEF_INDEX_SET(crtc->pipe, id, 0),
PS_COEF_INDEX_AUTO_INC);
@@ -42,9 +118,21 @@ void intel_sharpness_filter_enable(struct intel_crtc_state *crtc_state)
int intel_filter_compute_config(struct intel_crtc_state *crtc_state)
{
+ struct intel_crtc *intel_crtc = to_intel_crtc(crtc_state->uapi.crtc);
+ struct drm_i915_private *dev_priv = to_i915(intel_crtc->base.dev);
+
+ if (crtc_state->uapi.sharpness_strength == 0) {
+ crtc_state->hw.casf_params.need_scaler = false;
+ return 0;
+ }
+
if (!crtc_state->pch_pfit.enabled)
crtc_state->hw.casf_params.need_scaler = true;
+ intel_filter_size_compute(crtc_state);
+ drm_dbg(&dev_priv->drm, "Tap Size: %d\n",
+ crtc_state->hw.casf_params.win_size);
+
return 0;
}
@@ -129,3 +217,20 @@ void intel_sharpness_scaler_compute_config(struct intel_crtc_state *crtc_state)
}
}
}
+
+void intel_sharpness_disable(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);
+
+ intel_de_write(dev_priv, SHARPNESS_CTL(crtc->pipe), 0);
+ drm_dbg(&dev_priv->drm, "Filter strength value: %d\n", 0);
+}
+
+bool sharp_compute(struct intel_crtc_state *crtc_state)
+{
+ if (!(FILTER_EN & 1) && crtc_state->uapi.sharpness_strength != 0)
+ return true;
+
+ return false;
+}
diff --git a/drivers/gpu/drm/i915/display/intel_sharpen_filter.h b/drivers/gpu/drm/i915/display/intel_sharpen_filter.h
index 0dcdb5a967c0..21daea80b6aa 100644
--- a/drivers/gpu/drm/i915/display/intel_sharpen_filter.h
+++ b/drivers/gpu/drm/i915/display/intel_sharpen_filter.h
@@ -24,5 +24,10 @@ struct scaler_filter_coeff {
void intel_sharpness_filter_enable(struct intel_crtc_state *crtc_state);
void intel_sharpness_scaler_compute_config(struct intel_crtc_state *crtc_state);
int intel_filter_compute_config(struct intel_crtc_state *crtc_state);
+void intel_filter_lut_load(struct intel_crtc *crtc,
+ const struct intel_crtc_state *crtc_state);
+bool intel_sharpness_strength_changed(struct intel_atomic_state *state);
+void intel_sharpness_disable(struct intel_crtc_state *crtc_state);
+bool sharp_compute(struct intel_crtc_state *crtc_state);
#endif /* __INTEL_SHARPEN_FLITER_H__ */
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 32118ae1023d..c33688f72e5d 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -2396,6 +2396,23 @@
_ID(id, _PS_COEF_SET0_DATA_1A, _PS_COEF_SET0_DATA_2A) + (set) * 8, \
_ID(id, _PS_COEF_SET0_DATA_1B, _PS_COEF_SET0_DATA_2B) + (set) * 8)
+#define _SHARPNESS_CTL_A 0x682B0
+#define SHARPNESS_CTL(trans) _MMIO_PIPE2(dev_priv, trans, _SHARPNESS_CTL_A)
+#define FILTER_EN REG_BIT(31)
+#define FILTER_STRENGTH_MASK REG_GENMASK(15, 8)
+#define FILTER_STRENGTH(x) REG_FIELD_PREP(FILTER_STRENGTH_MASK, (x))
+#define FILTER_SIZE_MASK REG_GENMASK(1, 0)
+#define FILTER_SIZE(x) REG_FIELD_PREP(FILTER_SIZE_MASK, (x))
+
+#define _SHRPLUT_DATA_A 0x682B8
+#define SHRPLUT_DATA(trans) _MMIO_PIPE2(dev_priv, trans, _SHRPLUT_DATA_A)
+
+#define _SHRPLUT_INDEX_A 0x682B4
+#define SHRPLUT_INDEX(trans) _MMIO_PIPE2(dev_priv, trans, _SHRPLUT_INDEX_A)
+#define INDEX_AUTO_INCR REG_BIT(10)
+#define INDEX_VALUE_MASK REG_GENMASK(4, 0)
+#define INDEX_VALUE(x) REG_FIELD_PREP(INDEX_VALUE_MASK, (x))
+
/* Display Internal Timeout Register */
#define RM_TIMEOUT _MMIO(0x42060)
#define MMIO_TIMEOUT_US(us) ((us) << 0)
--
2.25.1
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