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-rw-r--r--common/recipes-kernel/linux/linux-yocto-4.14.71/4543-drm-amd-display-HLG-support.patch200
1 files changed, 200 insertions, 0 deletions
diff --git a/common/recipes-kernel/linux/linux-yocto-4.14.71/4543-drm-amd-display-HLG-support.patch b/common/recipes-kernel/linux/linux-yocto-4.14.71/4543-drm-amd-display-HLG-support.patch
new file mode 100644
index 00000000..8b681f68
--- /dev/null
+++ b/common/recipes-kernel/linux/linux-yocto-4.14.71/4543-drm-amd-display-HLG-support.patch
@@ -0,0 +1,200 @@
+From b85078591bed8f2359bf04c7f77818d8877387c5 Mon Sep 17 00:00:00 2001
+From: Vitaly Prosyak <vitaly.prosyak@amd.com>
+Date: Thu, 10 May 2018 12:37:35 -0500
+Subject: [PATCH 4543/5725] drm/amd/display: HLG support
+
+Low level calculation methods.
+
+Signed-off-by: Vitaly Prosyak <vitaly.prosyak@amd.com>
+Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
+Acked-by: Harry Wentland <harry.wentland@amd.com>
+---
+ drivers/gpu/drm/amd/display/dc/dc.h | 2 +
+ .../drm/amd/display/modules/color/color_gamma.c | 137 +++++++++++++++++++++
+ 2 files changed, 139 insertions(+)
+
+diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h
+index 693d828..cf076a6 100644
+--- a/drivers/gpu/drm/amd/display/dc/dc.h
++++ b/drivers/gpu/drm/amd/display/dc/dc.h
+@@ -378,6 +378,8 @@ enum dc_transfer_func_predefined {
+ TRANSFER_FUNCTION_PQ,
+ TRANSFER_FUNCTION_LINEAR,
+ TRANSFER_FUNCTION_UNITY,
++ TRANSFER_FUNCTION_HLG,
++ TRANSFER_FUNCTION_HLG12
+ };
+
+ struct dc_transfer_func {
+diff --git a/drivers/gpu/drm/amd/display/modules/color/color_gamma.c b/drivers/gpu/drm/amd/display/modules/color/color_gamma.c
+index e803b37..fa9a199 100644
+--- a/drivers/gpu/drm/amd/display/modules/color/color_gamma.c
++++ b/drivers/gpu/drm/amd/display/modules/color/color_gamma.c
+@@ -131,6 +131,63 @@ static void compute_de_pq(struct fixed31_32 in_x, struct fixed31_32 *out_y)
+ dc_fixpt_div(dc_fixpt_one, m1));
+
+ }
++
++/*de gamma, none linear to linear*/
++static void compute_hlg_oetf(struct fixed31_32 in_x, bool is_light0_12, struct fixed31_32 *out_y)
++{
++ struct fixed31_32 a;
++ struct fixed31_32 b;
++ struct fixed31_32 c;
++ struct fixed31_32 threshold;
++ struct fixed31_32 reference_white_level;
++
++ a = dc_fixpt_from_fraction(17883277, 100000000);
++ if (is_light0_12) {
++ /*light 0-12*/
++ b = dc_fixpt_from_fraction(28466892, 100000000);
++ c = dc_fixpt_from_fraction(55991073, 100000000);
++ threshold = dc_fixpt_one;
++ reference_white_level = dc_fixpt_half;
++ } else {
++ /*light 0-1*/
++ b = dc_fixpt_from_fraction(2372241, 100000000);
++ c = dc_fixpt_add(dc_fixpt_one, dc_fixpt_from_fraction(429347, 100000000));
++ threshold = dc_fixpt_from_fraction(1, 12);
++ reference_white_level = dc_fixpt_pow(dc_fixpt_from_fraction(3, 1), dc_fixpt_half);
++ }
++ if (dc_fixpt_lt(threshold, in_x))
++ *out_y = dc_fixpt_add(c, dc_fixpt_mul(a, dc_fixpt_log(dc_fixpt_sub(in_x, b))));
++ else
++ *out_y = dc_fixpt_mul(dc_fixpt_pow(in_x, dc_fixpt_half), reference_white_level);
++}
++
++/*re gamma, linear to none linear*/
++static void compute_hlg_eotf(struct fixed31_32 in_x, bool is_light0_12, struct fixed31_32 *out_y)
++{
++ struct fixed31_32 a;
++ struct fixed31_32 b;
++ struct fixed31_32 c;
++ struct fixed31_32 reference_white_level;
++
++ a = dc_fixpt_from_fraction(17883277, 100000000);
++ if (is_light0_12) {
++ /*light 0-12*/
++ b = dc_fixpt_from_fraction(28466892, 100000000);
++ c = dc_fixpt_from_fraction(55991073, 100000000);
++ reference_white_level = dc_fixpt_from_fraction(4, 1);
++ } else {
++ /*light 0-1*/
++ b = dc_fixpt_from_fraction(2372241, 100000000);
++ c = dc_fixpt_add(dc_fixpt_one, dc_fixpt_from_fraction(429347, 100000000));
++ reference_white_level = dc_fixpt_from_fraction(1, 3);
++ }
++ if (dc_fixpt_lt(dc_fixpt_half, in_x))
++ *out_y = dc_fixpt_add(dc_fixpt_exp(dc_fixpt_div(dc_fixpt_sub(in_x, c), a)), b);
++ else
++ *out_y = dc_fixpt_mul(dc_fixpt_pow(in_x, dc_fixpt_from_fraction(2, 1)), reference_white_level);
++}
++
++
+ /* one-time pre-compute PQ values - only for sdr_white_level 80 */
+ void precompute_pq(void)
+ {
+@@ -691,6 +748,48 @@ static void build_degamma(struct pwl_float_data_ex *curve,
+ }
+ }
+
++static void build_hlg_degamma(struct pwl_float_data_ex *degamma,
++ uint32_t hw_points_num,
++ const struct hw_x_point *coordinate_x, bool is_light0_12)
++{
++ uint32_t i;
++
++ struct pwl_float_data_ex *rgb = degamma;
++ const struct hw_x_point *coord_x = coordinate_x;
++
++ i = 0;
++
++ while (i != hw_points_num + 1) {
++ compute_hlg_oetf(coord_x->x, is_light0_12, &rgb->r);
++ rgb->g = rgb->r;
++ rgb->b = rgb->r;
++ ++coord_x;
++ ++rgb;
++ ++i;
++ }
++}
++
++static void build_hlg_regamma(struct pwl_float_data_ex *regamma,
++ uint32_t hw_points_num,
++ const struct hw_x_point *coordinate_x, bool is_light0_12)
++{
++ uint32_t i;
++
++ struct pwl_float_data_ex *rgb = regamma;
++ const struct hw_x_point *coord_x = coordinate_x;
++
++ i = 0;
++
++ while (i != hw_points_num + 1) {
++ compute_hlg_eotf(coord_x->x, is_light0_12, &rgb->r);
++ rgb->g = rgb->r;
++ rgb->b = rgb->r;
++ ++coord_x;
++ ++rgb;
++ ++i;
++ }
++}
++
+ static void scale_gamma(struct pwl_float_data *pwl_rgb,
+ const struct dc_gamma *ramp,
+ struct dividers dividers)
+@@ -1615,6 +1714,25 @@ bool mod_color_calculate_curve(enum dc_transfer_func_predefined trans,
+ ret = true;
+
+ kvfree(rgb_regamma);
++ } else if (trans == TRANSFER_FUNCTION_HLG ||
++ trans == TRANSFER_FUNCTION_HLG12) {
++ rgb_regamma = kvzalloc(sizeof(*rgb_regamma) *
++ (MAX_HW_POINTS + _EXTRA_POINTS),
++ GFP_KERNEL);
++ if (!rgb_regamma)
++ goto rgb_regamma_alloc_fail;
++
++ build_hlg_regamma(rgb_regamma,
++ MAX_HW_POINTS,
++ coordinates_x,
++ trans == TRANSFER_FUNCTION_HLG12 ? true:false);
++ for (i = 0; i <= MAX_HW_POINTS ; i++) {
++ points->red[i] = rgb_regamma[i].r;
++ points->green[i] = rgb_regamma[i].g;
++ points->blue[i] = rgb_regamma[i].b;
++ }
++ ret = true;
++ kvfree(rgb_regamma);
+ }
+ rgb_regamma_alloc_fail:
+ return ret;
+@@ -1675,6 +1793,25 @@ bool mod_color_calculate_degamma_curve(enum dc_transfer_func_predefined trans,
+ ret = true;
+
+ kvfree(rgb_degamma);
++ } else if (trans == TRANSFER_FUNCTION_HLG ||
++ trans == TRANSFER_FUNCTION_HLG12) {
++ rgb_degamma = kvzalloc(sizeof(*rgb_degamma) *
++ (MAX_HW_POINTS + _EXTRA_POINTS),
++ GFP_KERNEL);
++ if (!rgb_degamma)
++ goto rgb_degamma_alloc_fail;
++
++ build_hlg_degamma(rgb_degamma,
++ MAX_HW_POINTS,
++ coordinates_x,
++ trans == TRANSFER_FUNCTION_HLG12 ? true:false);
++ for (i = 0; i <= MAX_HW_POINTS ; i++) {
++ points->red[i] = rgb_degamma[i].r;
++ points->green[i] = rgb_degamma[i].g;
++ points->blue[i] = rgb_degamma[i].b;
++ }
++ ret = true;
++ kvfree(rgb_degamma);
+ }
+ points->end_exponent = 0;
+ points->x_point_at_y1_red = 1;
+--
+2.7.4
+
generated by cgit 1.2.3-korg (git 2.39.0) at 2024-04-23 13:28:13 +0000