[PATCH 11/22] drm/amd/display: Fix programming of gamma end points
Harry Wentland
harry.wentland at amd.com
Wed Dec 21 16:30:05 UTC 2016
From: Anthony Koo <Anthony.Koo at amd.com>
Change-Id: I500e10ac78d4eac236c994257d530c5ed86b69ba
Signed-off-by: Anthony Koo <anthony.koo at amd.com>
Reviewed-by: Anthony Koo <Anthony.Koo at amd.com>
Acked-by: Harry Wentland <Harry.Wentland at amd.com>
---
drivers/gpu/drm/amd/display/dc/calcs/gamma_calcs.c | 51 ++++++++++++----------
1 file changed, 27 insertions(+), 24 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/calcs/gamma_calcs.c b/drivers/gpu/drm/amd/display/dc/calcs/gamma_calcs.c
index 729652a3763d..5cd408dadb20 100644
--- a/drivers/gpu/drm/amd/display/dc/calcs/gamma_calcs.c
+++ b/drivers/gpu/drm/amd/display/dc/calcs/gamma_calcs.c
@@ -245,6 +245,8 @@ static bool build_hw_curve_configuration(
uint32_t segments = 0;
uint32_t max_number;
+ int8_t num_regions = 0;
+
bool result = false;
if (!number_of_points) {
@@ -273,6 +275,7 @@ static bool build_hw_curve_configuration(
ASSERT(curve_config->segments[i] >= 0);
segments += (1 << curve_config->segments[i]);
+ ++num_regions;
++i;
}
@@ -284,12 +287,14 @@ static bool build_hw_curve_configuration(
uint32_t offset = 0;
int8_t begin = curve_config->begin;
int32_t region_number = 0;
+ struct fixed31_32 magic_number =
+ dal_fixed31_32_from_fraction(249, 1000);
i = begin;
while ((index < max_number) &&
(region_number < max_regions_number) &&
- (i <= 1)) {
+ (i < (begin + num_regions))) {
int32_t j = 0;
segments = curve_config->segments[region_number];
@@ -345,8 +350,7 @@ static bool build_hw_curve_configuration(
divisor);
points[index].x = region1;
-
- round_custom_float_6_12(points + index);
+ points[index].adjusted_x = region1;
++index;
++region_number;
@@ -366,9 +370,10 @@ static bool build_hw_curve_configuration(
++i;
}
- points[index].x = region1;
-
- round_custom_float_6_12(points + index);
+ points[index].x =
+ dal_fixed31_32_add(region1, magic_number);
+ points[index].adjusted_x =
+ dal_fixed31_32_add(region1, magic_number);
*number_of_points = index;
@@ -1215,15 +1220,11 @@ static void rebuild_curve_configuration_magic(
const struct hw_x_point *coordinates_x,
uint32_t hw_points_num)
{
- const struct fixed31_32 magic_number =
- dal_fixed31_32_from_fraction(249, 1000);
-
struct fixed31_32 y_r;
struct fixed31_32 y_g;
struct fixed31_32 y_b;
struct fixed31_32 y1_min;
- struct fixed31_32 y2_max;
struct fixed31_32 y3_max;
y_r = rgb_resulted[0].red;
@@ -1238,29 +1239,31 @@ static void rebuild_curve_configuration_magic(
arr_points[0].y,
arr_points[0].x);
- arr_points[1].x = dal_fixed31_32_add(
- coordinates_x[hw_points_num - 1].adjusted_x,
- magic_number);
-
- arr_points[2].x = arr_points[1].x;
-
- y_r = rgb_resulted[hw_points_num - 1].red;
- y_g = rgb_resulted[hw_points_num - 1].green;
- y_b = rgb_resulted[hw_points_num - 1].blue;
-
- y2_max = dal_fixed31_32_max(y_r, dal_fixed31_32_max(y_g, y_b));
-
- arr_points[1].y = y2_max;
+ /* this should be cleaned up as it's confusing my understanding (KK) is
+ * that REGAMMA_CNTLA_EXP_REGION_END is the X value for the region end
+ * REGAMMA_CNTLA_EXP_REGION_END_BASE is Y value for the above X
+ * REGAMMA_CNTLA_EXP_REGION_END_SLOPE is the slope beyond (X,Y) above
+ * currently when programming REGION_END = m_arrPoints[1].x,
+ * REGION_END_BASE = m_arrPoints[1].y, REGION_END_SLOPE=1
+ * we don't use m_arrPoints[2] at all after this function,
+ * and its purpose isn't clear to me
+ */
+ arr_points[1].x = coordinates_x[hw_points_num].adjusted_x;
+ arr_points[2].x = coordinates_x[hw_points_num].adjusted_x;
y_r = rgb_resulted[hw_points_num].red;
y_g = rgb_resulted[hw_points_num].green;
y_b = rgb_resulted[hw_points_num].blue;
+ /* see comment above, m_arrPoints[1].y should be the Y value for the
+ * region end (m_numOfHwPoints), not last HW point(m_numOfHwPoints - 1)
+ */
y3_max = dal_fixed31_32_max(y_r, dal_fixed31_32_max(y_g, y_b));
+ arr_points[1].y = y3_max;
arr_points[2].y = y3_max;
- arr_points[2].slope = dal_fixed31_32_one;
+ arr_points[2].slope = dal_fixed31_32_zero;
}
static bool convert_to_custom_float_format(
--
2.9.3
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