Scaler coefficient values are based on experiments
and vary for different tap value/win size. These values
are normalized by taking the sum of all values and then
dividing each value with a sum.
Signed-off-by: Nemesa Garg <nemesa.garg@xxxxxxxxx>
---
drivers/gpu/drm/i915/Makefile | 1 +
drivers/gpu/drm/i915/display/intel_display.c | 3 +
.../drm/i915/display/intel_display_types.h | 9 ++
.../drm/i915/display/intel_sharpen_filter.c | 121 ++++++++++++++++++
.../drm/i915/display/intel_sharpen_filter.h | 27 ++++
drivers/gpu/drm/i915/i915_reg.h | 2 +
drivers/gpu/drm/xe/Makefile | 1 +
7 files changed, 164 insertions(+)
create mode 100644 drivers/gpu/drm/i915/display/intel_sharpen_filter.c
create mode 100644 drivers/gpu/drm/i915/display/intel_sharpen_filter.h
diff --git a/drivers/gpu/drm/i915/Makefile b/drivers/gpu/drm/i915/Makefile
index c13f14edb508..97d1cf705b40 100644
--- a/drivers/gpu/drm/i915/Makefile
+++ b/drivers/gpu/drm/i915/Makefile
@@ -305,6 +305,7 @@ i915-y += \
display/intel_pmdemand.o \
display/intel_psr.o \
display/intel_quirks.o \
+ display/intel_sharpen_filter.o \
display/intel_sprite.o \
display/intel_sprite_uapi.o \
display/intel_tc.o \
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 7db0655d8c9e..5a93bbd1fe25 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -2444,6 +2444,9 @@ static int intel_crtc_compute_config(struct intel_atomic_state *state,
if (crtc_state->has_pch_encoder)
return ilk_fdi_compute_config(crtc, crtc_state);
+ if (crtc_state->hw.casf_params.strength_changed)
+ intel_sharpness_scaler_compute_config(crtc_state);
+
return 0;
}
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index 01eb6e4e6049..a7a24d177586 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -53,6 +53,7 @@
#include "intel_display_limits.h"
#include "intel_display_power.h"
#include "intel_dpll_mgr.h"
+#include "intel_sharpen_filter.h"
#include "intel_wm_types.h"
struct drm_printer;
@@ -794,6 +795,13 @@ struct intel_scaler {
u32 mode;
};
+struct intel_sharpen_filter {
+ struct scaler_filter_coeff coeff[7];
+ u32 scaler_coefficient[119];
+ bool strength_changed;
+ u8 win_size;
+};
+
struct intel_crtc_scaler_state {
#define SKL_NUM_SCALERS 2
struct intel_scaler scalers[SKL_NUM_SCALERS];
@@ -1075,6 +1083,7 @@ struct intel_crtc_state {
struct drm_property_blob *degamma_lut, *gamma_lut, *ctm;
struct drm_display_mode mode, pipe_mode, adjusted_mode;
enum drm_scaling_filter scaling_filter;
+ struct intel_sharpen_filter casf_params;
} hw;
/* actual state of LUTs */
diff --git a/drivers/gpu/drm/i915/display/intel_sharpen_filter.c b/drivers/gpu/drm/i915/display/intel_sharpen_filter.c
new file mode 100644
index 000000000000..366739d9dead
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_sharpen_filter.c
@@ -0,0 +1,121 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2024 Intel Corporation
+ *
+ */
+
+#include "i915_reg.h"
+#include "intel_de.h"
+#include "intel_display_types.h"
+#include "skl_scaler.h"
+
+#define MAX_NUM_UNIQUE_COEF_FOR_SHARPNESS_FILTER 7
+#define SCALER_FILTER_NUM_TAPS 7
+#define SCALER_FILTER_NUM_PHASES 17
+#define filter_coeff_0_125 125
+#define filter_coeff_0_25 250
+#define filter_coeff_0_5 500
+#define filter_coeff_1_0 1000
+#define filter_coeff_0_0 0
+
+void intel_sharpen_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;
+
+ intel_de_write_fw(dev_priv, GLK_PS_COEF_INDEX_SET(crtc->pipe, id, 0),
+ PS_COEF_INDEX_AUTO_INC);
+
+ intel_de_write_fw(dev_priv, GLK_PS_COEF_INDEX_SET(crtc->pipe, id, 1),
+ PS_COEF_INDEX_AUTO_INC);
+
+ for (int index = 0; index < 60; index++) {
+ intel_de_write_fw(dev_priv, GLK_PS_COEF_DATA_SET(crtc->pipe, id, 0),
+ crtc_state->hw.casf_params.scaler_coefficient[index]);
+ intel_de_write_fw(dev_priv, GLK_PS_COEF_DATA_SET(crtc->pipe, id, 1),
+ crtc_state->hw.casf_params. scaler_coefficient[index]);
+ }
+}
+
+static void convert_sharpness_coef_binary(struct scaler_filter_coeff *coeff,
+ u16 coefficient)
+{
+ if (coefficient < 25) {
+ coeff->mantissa = (coefficient * 2048) / 100;
+ coeff->exp = 3;
+ }
+
+ else if (coefficient < 50) {
+ coeff->mantissa = (coefficient * 1024) / 100;
+ coeff->exp = 2;
+ }
+
+ else if (coefficient < 100) {
+ coeff->mantissa = (coefficient * 512) / 100;
+ coeff->exp = 1;
+ } else {
+ coeff->mantissa = (coefficient * 256) / 100;
+ coeff->exp = 0;
+ }
+}
+
+static void intel_sharpness_filter_coeff(struct intel_crtc_state *crtc_state)
+{
+ u16 filtercoeff[MAX_NUM_UNIQUE_COEF_FOR_SHARPNESS_FILTER];
+ u16 sumcoeff = 0;
+ u8 i;
+
+ if (crtc_state->hw.casf_params.win_size == 0) {
+ filtercoeff[0] = filter_coeff_0_0;
+ filtercoeff[1] = filter_coeff_0_0;
+ filtercoeff[2] = filter_coeff_0_5;
+ filtercoeff[3] = filter_coeff_1_0;
+ filtercoeff[4] = filter_coeff_0_5;
+ filtercoeff[5] = filter_coeff_0_0;
+ filtercoeff[6] = filter_coeff_0_0;
+ }
+
+ else if (crtc_state->hw.casf_params.win_size == 1) {
+ filtercoeff[0] = filter_coeff_0_0;
+ filtercoeff[1] = filter_coeff_0_25;
+ filtercoeff[2] = filter_coeff_0_5;
+ filtercoeff[3] = filter_coeff_1_0;
+ filtercoeff[4] = filter_coeff_0_5;
+ filtercoeff[5] = filter_coeff_0_25;
+ filtercoeff[6] = filter_coeff_0_0;
+ } else {
+ filtercoeff[0] = filter_coeff_0_125;
+ filtercoeff[1] = filter_coeff_0_25;
+ filtercoeff[2] = filter_coeff_0_5;
+ filtercoeff[3] = filter_coeff_1_0;
+ filtercoeff[4] = filter_coeff_0_5;
+ filtercoeff[5] = filter_coeff_0_25;
+ filtercoeff[6] = filter_coeff_0_125;
+ }
+
+ for (i = 0; i < MAX_NUM_UNIQUE_COEF_FOR_SHARPNESS_FILTER; i++)
+ sumcoeff += filtercoeff[i];
+
+ for (i = 0; i < MAX_NUM_UNIQUE_COEF_FOR_SHARPNESS_FILTER; i++) {
+ filtercoeff[i] = (filtercoeff[i] * 100 / sumcoeff);
+ convert_sharpness_coef_binary(&crtc_state->hw.casf_params.coeff[i],
+ filtercoeff[i]);
+ }
+}
+
+void intel_sharpness_scaler_compute_config(struct intel_crtc_state *crtc_state)
+{
+ u16 phase, tapindex, phaseoffset;
+ u16 *coeff = (u16 *)crtc_state->hw.casf_params.scaler_coefficient;
+
+ intel_sharpness_filter_coeff(crtc_state);
+
+ for (phase = 0; phase < SCALER_FILTER_NUM_PHASES; phase++) {
+ phaseoffset = SCALER_FILTER_NUM_TAPS * phase;
+ for (tapindex = 0; tapindex < SCALER_FILTER_NUM_TAPS; tapindex++) {
+ coeff[phaseoffset + tapindex] =
+ SHARP_COEFF_TO_REG_FORMAT(crtc_state->hw.casf_params.coeff[tapindex]);
+ }
+ }
+}
diff --git a/drivers/gpu/drm/i915/display/intel_sharpen_filter.h b/drivers/gpu/drm/i915/display/intel_sharpen_filter.h
new file mode 100644
index 000000000000..6b668aaedf65
--- /dev/null
+++ b/drivers/gpu/drm/i915/display/intel_sharpen_filter.h
@@ -0,0 +1,27 @@
+/* SPDX-License-Identifier: MIT */
+/*
+ * Copyright © 2024 Intel Corporation
+ */
+
+#ifndef __INTEL_SHARPEN_FLITER_H__
+#define __INTEL_SHARPEN_FILTER_H__
+
+#include <linux/types.h>
+
+#define SHARP_COEFF_TO_REG_FORMAT(coefficient) ((u16)(coefficient.sign << 15 | \
+ coefficient.exp << 12 | coefficient.mantissa << 3))
+
+struct intel_crtc;
+struct intel_crtc_state;
+struct intel_atomic_state;
+
+struct scaler_filter_coeff {
+ u16 sign;
+ u16 exp;
+ u16 mantissa;
+};
+
+void intel_sharpen_filter_enable(struct intel_crtc_state *crtc_state);
+void intel_sharpness_scaler_compute_config(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 e00557e1a57f..9d759026add4 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -4072,6 +4072,8 @@
#define PS_VERT_INT_INVERT_FIELD REG_BIT(20)
#define PS_PROG_SCALE_FACTOR REG_BIT(19) /* tgl+ */
#define PS_PWRUP_PROGRESS REG_BIT(17)
+#define PS_BYPASS_ARMING REG_BIT(10)
+#define PS_DB_STALL REG_BIT(9)
#define PS_V_FILTER_BYPASS REG_BIT(8)
#define PS_VADAPT_EN REG_BIT(7) /* skl/bxt */
#define PS_VADAPT_MODE_MASK REG_GENMASK(6, 5) /* skl/bxt */
diff --git a/drivers/gpu/drm/xe/Makefile b/drivers/gpu/drm/xe/Makefile
index c531210695db..4148eb015c11 100644
--- a/drivers/gpu/drm/xe/Makefile
+++ b/drivers/gpu/drm/xe/Makefile
@@ -269,6 +269,7 @@ xe-$(CONFIG_DRM_XE_DISPLAY) += \
i915-display/intel_psr.o \
i915-display/intel_qp_tables.o \
i915-display/intel_quirks.o \
+ i915-display/intel_sharpen_filter.o \
i915-display/intel_snps_phy.o \
i915-display/intel_tc.o \
i915-display/intel_vblank.o \
--
2.25.1
