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drm/amd/display: Default to linear output gamma 

[Why] Our output TF calculation doesn't work if no user-specified gamma
correction. Normally, user provides this, but driver sohuld just assume
default (linear) gamma otherwise.

[How] Remove output TF dependency on user gamma being provided.

Signed-off-by: Krunoslav Kovac <Krunoslav.Kovac@amd.com>
Reviewed-by: Anthony Koo <Anthony.Koo@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Acked-by: Sivapiriyan Kumarasamy <Sivapiriyan.Kumarasamy@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Krunoslav Kovac 2019-01-08 18:32:34 -05:00 committed by Alex Deucher
parent 3cec41769d
commit 130ef745f7
1 changed files with 40 additions and 33 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

73
drivers/gpu/drm/amd/display/modules/color/color_gamma.c
View File

@ -1508,7 +1508,7 @@ static bool map_regamma_hw_to_x_user(
struct hw_x_point *coords = coords_x;
const struct pwl_float_data_ex *regamma = rgb_regamma;
if (mapUserRamp) {
if (ramp && mapUserRamp) {
copy_rgb_regamma_to_coordinates_x(coords,
hw_points_num,
rgb_regamma);
@ -1545,7 +1545,7 @@ bool mod_color_calculate_regamma_params(struct dc_transfer_func *output_tf,
struct pwl_float_data *rgb_user = NULL;
struct pwl_float_data_ex *rgb_regamma = NULL;
struct gamma_pixel *axix_x = NULL;
struct gamma_pixel *axis_x = NULL;
struct pixel_gamma_point *coeff = NULL;
enum dc_transfer_func_predefined tf = TRANSFER_FUNCTION_SRGB;
bool ret = false;
@ -1555,47 +1555,54 @@ bool mod_color_calculate_regamma_params(struct dc_transfer_func *output_tf,
/* we can use hardcoded curve for plain SRGB TF */
if (output_tf->type == TF_TYPE_PREDEFINED && canRomBeUsed == true &&
output_tf->tf == TRANSFER_FUNCTION_SRGB &&
(ramp->is_identity || (!mapUserRamp && ramp->type == GAMMA_RGB_256)))
return true;
output_tf->tf == TRANSFER_FUNCTION_SRGB) {
if (ramp == NULL)
return true;
if (ramp->is_identity || (!mapUserRamp && ramp->type == GAMMA_RGB_256))
return true;
}
output_tf->type = TF_TYPE_DISTRIBUTED_POINTS;
rgb_user = kvcalloc(ramp->num_entries + _EXTRA_POINTS,
if (ramp && (mapUserRamp || ramp->type != GAMMA_RGB_256)) {
rgb_user = kvcalloc(ramp->num_entries + _EXTRA_POINTS,
sizeof(*rgb_user),
GFP_KERNEL);
if (!rgb_user)
goto rgb_user_alloc_fail;
if (!rgb_user)
goto rgb_user_alloc_fail;
axis_x = kvcalloc(ramp->num_entries + 3, sizeof(*axis_x),
GFP_KERNEL);
if (!axis_x)
goto axis_x_alloc_fail;
dividers.divider1 = dc_fixpt_from_fraction(3, 2);
dividers.divider2 = dc_fixpt_from_int(2);
dividers.divider3 = dc_fixpt_from_fraction(5, 2);
build_evenly_distributed_points(
axis_x,
ramp->num_entries,
dividers);
if (ramp->type == GAMMA_RGB_256 && mapUserRamp)
scale_gamma(rgb_user, ramp, dividers);
else if (ramp->type == GAMMA_RGB_FLOAT_1024)
scale_gamma_dx(rgb_user, ramp, dividers);
}
rgb_regamma = kvcalloc(MAX_HW_POINTS + _EXTRA_POINTS,
sizeof(*rgb_regamma),
GFP_KERNEL);
if (!rgb_regamma)
goto rgb_regamma_alloc_fail;
axix_x = kvcalloc(ramp->num_entries + 3, sizeof(*axix_x),
GFP_KERNEL);
if (!axix_x)
goto axix_x_alloc_fail;
coeff = kvcalloc(MAX_HW_POINTS + _EXTRA_POINTS, sizeof(*coeff),
GFP_KERNEL);
if (!coeff)
goto coeff_alloc_fail;
dividers.divider1 = dc_fixpt_from_fraction(3, 2);
dividers.divider2 = dc_fixpt_from_int(2);
dividers.divider3 = dc_fixpt_from_fraction(5, 2);
tf = output_tf->tf;
build_evenly_distributed_points(
axix_x,
ramp->num_entries,
dividers);
if (ramp->type == GAMMA_RGB_256 && mapUserRamp)
scale_gamma(rgb_user, ramp, dividers);
else if (ramp->type == GAMMA_RGB_FLOAT_1024)
scale_gamma_dx(rgb_user, ramp, dividers);
if (tf == TRANSFER_FUNCTION_PQ) {
tf_pts->end_exponent = 7;
tf_pts->x_point_at_y1_red = 125;
@ -1623,22 +1630,22 @@ bool mod_color_calculate_regamma_params(struct dc_transfer_func *output_tf,
coordinates_x, tf == TRANSFER_FUNCTION_SRGB ? true:false);
}
map_regamma_hw_to_x_user(ramp, coeff, rgb_user,
coordinates_x, axix_x, rgb_regamma,
coordinates_x, axis_x, rgb_regamma,
MAX_HW_POINTS, tf_pts,
(mapUserRamp || ramp->type != GAMMA_RGB_256) &&
ramp->type != GAMMA_CS_TFM_1D);
(mapUserRamp || (ramp && ramp->type != GAMMA_RGB_256)) &&
(ramp && ramp->type != GAMMA_CS_TFM_1D));
if (ramp->type == GAMMA_CS_TFM_1D)
if (ramp && ramp->type == GAMMA_CS_TFM_1D)
apply_lut_1d(ramp, MAX_HW_POINTS, tf_pts);
ret = true;
kvfree(coeff);
coeff_alloc_fail:
kvfree(axix_x);
axix_x_alloc_fail:
kvfree(rgb_regamma);
rgb_regamma_alloc_fail:
kvfree(axis_x);
axis_x_alloc_fail:
kvfree(rgb_user);
rgb_user_alloc_fail:
return ret;