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drm/amd/display: Rework DCE transform bit depth reduction programming.

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Clear up the logic, and enable programming truncation as a bit reduction
mode.

Signed-off-by: Leo (Sunpeng) Li <sunpeng.li@amd.com>
Reviewed-by: Harry Wentland <Harry.Wentland@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Leo (Sunpeng) Li 2018-02-06 16:35:21 -05:00 committed by Alex Deucher
parent aed7b06e49
commit 60c118c643
1 changed files with 35 additions and 67 deletions
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102
drivers/gpu/drm/amd/display/dc/dce/dce_transform.c
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@ -618,80 +618,48 @@ static void program_bit_depth_reduction(
enum dc_color_depth depth,
const struct bit_depth_reduction_params *bit_depth_params)
{
enum dcp_bit_depth_reduction_mode depth_reduction_mode;
enum dcp_spatial_dither_mode spatial_dither_mode;
bool frame_random_enable;
bool rgb_random_enable;
bool highpass_random_enable;
enum dcp_out_trunc_round_depth trunc_round_depth;
enum dcp_out_trunc_round_mode trunc_mode;
bool spatial_dither_enable;
ASSERT(depth < COLOR_DEPTH_121212); /* Invalid clamp bit depth */
if (bit_depth_params->flags.SPATIAL_DITHER_ENABLED) {
depth_reduction_mode = DCP_BIT_DEPTH_REDUCTION_MODE_DITHER;
frame_random_enable = true;
rgb_random_enable = true;
highpass_random_enable = true;
spatial_dither_enable = bit_depth_params->flags.SPATIAL_DITHER_ENABLED;
/* Default to 12 bit truncation without rounding */
trunc_round_depth = DCP_OUT_TRUNC_ROUND_DEPTH_12BIT;
trunc_mode = DCP_OUT_TRUNC_ROUND_MODE_TRUNCATE;
} else {
depth_reduction_mode = DCP_BIT_DEPTH_REDUCTION_MODE_DISABLED;
frame_random_enable = false;
rgb_random_enable = false;
highpass_random_enable = false;
if (bit_depth_params->flags.TRUNCATE_ENABLED) {
/* Don't enable dithering if truncation is enabled */
spatial_dither_enable = false;
trunc_mode = bit_depth_params->flags.TRUNCATE_MODE ?
DCP_OUT_TRUNC_ROUND_MODE_ROUND :
DCP_OUT_TRUNC_ROUND_MODE_TRUNCATE;
if (bit_depth_params->flags.TRUNCATE_DEPTH == 0 ||
bit_depth_params->flags.TRUNCATE_DEPTH == 1)
trunc_round_depth = DCP_OUT_TRUNC_ROUND_DEPTH_8BIT;
else if (bit_depth_params->flags.TRUNCATE_DEPTH == 2)
trunc_round_depth = DCP_OUT_TRUNC_ROUND_DEPTH_10BIT;
else {
/*
* Invalid truncate/round depth. Setting here to 12bit
* to prevent use-before-initialize errors.
*/
trunc_round_depth = DCP_OUT_TRUNC_ROUND_DEPTH_12BIT;
BREAK_TO_DEBUGGER();
}
}
spatial_dither_mode = DCP_SPATIAL_DITHER_MODE_A_AA_A;
set_clamp(xfm_dce, depth);
switch (depth_reduction_mode) {
case DCP_BIT_DEPTH_REDUCTION_MODE_DITHER:
/* Spatial Dither: Set round/truncate to bypass (12bit),
* enable Dither (30bpp) */
set_round(xfm_dce,
DCP_OUT_TRUNC_ROUND_MODE_TRUNCATE,
DCP_OUT_TRUNC_ROUND_DEPTH_12BIT);
set_dither(xfm_dce, true, spatial_dither_mode,
DCP_SPATIAL_DITHER_DEPTH_30BPP, frame_random_enable,
rgb_random_enable, highpass_random_enable);
break;
case DCP_BIT_DEPTH_REDUCTION_MODE_ROUND:
/* Round: Enable round (10bit), disable Dither */
set_round(xfm_dce,
DCP_OUT_TRUNC_ROUND_MODE_ROUND,
DCP_OUT_TRUNC_ROUND_DEPTH_10BIT);
set_dither(xfm_dce, false, spatial_dither_mode,
DCP_SPATIAL_DITHER_DEPTH_30BPP, frame_random_enable,
rgb_random_enable, highpass_random_enable);
break;
case DCP_BIT_DEPTH_REDUCTION_MODE_TRUNCATE: /* Truncate */
/* Truncate: Enable truncate (10bit), disable Dither */
set_round(xfm_dce,
DCP_OUT_TRUNC_ROUND_MODE_TRUNCATE,
DCP_OUT_TRUNC_ROUND_DEPTH_10BIT);
set_dither(xfm_dce, false, spatial_dither_mode,
DCP_SPATIAL_DITHER_DEPTH_30BPP, frame_random_enable,
rgb_random_enable, highpass_random_enable);
break;
case DCP_BIT_DEPTH_REDUCTION_MODE_DISABLED: /* Disabled */
/* Truncate: Set round/truncate to bypass (12bit),
* disable Dither */
set_round(xfm_dce,
DCP_OUT_TRUNC_ROUND_MODE_TRUNCATE,
DCP_OUT_TRUNC_ROUND_DEPTH_12BIT);
set_dither(xfm_dce, false, spatial_dither_mode,
DCP_SPATIAL_DITHER_DEPTH_30BPP, frame_random_enable,
rgb_random_enable, highpass_random_enable);
break;
default:
/* Invalid DCP Depth reduction mode */
BREAK_TO_DEBUGGER();
break;
}
set_round(xfm_dce, trunc_mode, trunc_round_depth);
set_dither(xfm_dce,
spatial_dither_enable,
DCP_SPATIAL_DITHER_MODE_A_AA_A,
DCP_SPATIAL_DITHER_DEPTH_30BPP,
bit_depth_params->flags.FRAME_RANDOM,
bit_depth_params->flags.RGB_RANDOM,
bit_depth_params->flags.HIGHPASS_RANDOM);
}
static int dce_transform_get_max_num_of_supported_lines(