diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/modules/color/color_gamma.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/modules/color/color_gamma.c | 147 |
1 files changed, 144 insertions, 3 deletions
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 eee0dfad6962..bf29733958c3 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) @@ -898,7 +997,9 @@ static void scale_user_regamma_ramp(struct pwl_float_data *pwl_rgb, * norm_y = 4095*regamma_y, and index is just truncating to nearest integer * lut1 = lut1D[index], lut2 = lut1D[index+1] * - *adjustedY is then linearly interpolating regamma Y between lut1 and lut2 + * adjustedY is then linearly interpolating regamma Y between lut1 and lut2 + * + * Custom degamma on Linux uses the same interpolation math, so is handled here */ static void apply_lut_1d( const struct dc_gamma *ramp, @@ -919,7 +1020,7 @@ static void apply_lut_1d( struct fixed31_32 delta_lut; struct fixed31_32 delta_index; - if (ramp->type != GAMMA_CS_TFM_1D) + if (ramp->type != GAMMA_CS_TFM_1D && ramp->type != GAMMA_CUSTOM) return; // this is not expected for (i = 0; i < num_hw_points; i++) { @@ -1537,7 +1638,9 @@ bool mod_color_calculate_degamma_params(struct dc_transfer_func *input_tf, map_regamma_hw_to_x_user(ramp, coeff, rgb_user, coordinates_x, axix_x, curve, MAX_HW_POINTS, tf_pts, - mapUserRamp); + mapUserRamp && ramp->type != GAMMA_CUSTOM); + if (ramp->type == GAMMA_CUSTOM) + apply_lut_1d(ramp, MAX_HW_POINTS, tf_pts); ret = true; @@ -1622,6 +1725,25 @@ 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 = kvcalloc(MAX_HW_POINTS + _EXTRA_POINTS, + sizeof(*rgb_regamma), + 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; @@ -1682,6 +1804,25 @@ 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 = kvcalloc(MAX_HW_POINTS + _EXTRA_POINTS, + sizeof(*rgb_degamma), + 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; |