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drm/amd/display: remove legacy DSC functions 

[why]
Clean up some dsc legacy functions that are
no longer needed.

[how]
remove two dsc functions in dc_dsc, use dc_bandwidth_in_kbps_from_timing
instead of calc_required_bandwidth_for_timing.

Signed-off-by: Wenjing Liu <Wenjing.Liu@amd.com>
Reviewed-by: Nikola Cornij <Nikola.Cornij@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Wenjing Liu 2019-03-23 16:28:31 -04:00 committed by Alex Deucher
parent 2e2e73fc63
commit 390fdfbd2d
2 changed files with 9 additions and 124 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/gpu/drm/amd/display/dc/dc_dsc.h
View File

@ -47,15 +47,5 @@ bool dc_dsc_compute_config(
int target_bandwidth,
const struct dc_crtc_timing *timing,
struct dc_dsc_config *dsc_cfg);
bool dc_check_and_fit_timing_into_bandwidth_with_dsc_legacy(
const struct dc *pDC,
const struct dc_link *link,
struct dc_crtc_timing *timing);
bool dc_setup_dsc_in_timing_legacy(const struct dc *pDC,
const struct dsc_dec_dpcd_caps *dsc_sink_caps,
int available_bandwidth_kbps,
struct dc_crtc_timing *timing);
#endif
#endif

123
drivers/gpu/drm/amd/display/dc/dsc/dc_dsc.c
View File

@ -231,66 +231,6 @@ static bool dc_intersect_dsc_caps(
return true;
}
// TODO DSC: Can this be moved to a common helper module and replace WindowsDM::calcRequiredBandwidthForTiming()?
static int bpp_from_dc_color_depth(enum dc_color_depth color_depth)
{
int bits_per_pixel;
// Get color depth in bits per pixel
switch (color_depth) {
case COLOR_DEPTH_UNDEFINED:
bits_per_pixel = 0;
break;
case COLOR_DEPTH_666:
bits_per_pixel = 6;
break;
case COLOR_DEPTH_888:
bits_per_pixel = 8;
break;
case COLOR_DEPTH_101010:
bits_per_pixel = 10;
break;
case COLOR_DEPTH_121212:
bits_per_pixel = 12;
break;
case COLOR_DEPTH_141414:
bits_per_pixel = 14;
break;
case COLOR_DEPTH_161616:
bits_per_pixel = 16;
break;
case COLOR_DEPTH_999:
bits_per_pixel = 9;
break;
case COLOR_DEPTH_111111:
bits_per_pixel = 11;
break;
case COLOR_DEPTH_COUNT:
default:
bits_per_pixel = 0;
break;
}
return bits_per_pixel;
}
// TODO DSC: Can this be moved to a common helper module and replace WindowsDM::calcRequiredBandwidthForTiming()?
static int calc_required_bandwidth_for_timing(const struct dc_crtc_timing *crtc_timing)
{
int timing_bandwidth_kbps = 0;
int bits_per_pixel = bpp_from_dc_color_depth(crtc_timing->display_color_depth);
if (crtc_timing->pixel_encoding == PIXEL_ENCODING_RGB ||
crtc_timing->pixel_encoding == PIXEL_ENCODING_YCBCR444)
timing_bandwidth_kbps = crtc_timing->pix_clk_100hz * bits_per_pixel * 3 / 10;
else if (crtc_timing->pixel_encoding == PIXEL_ENCODING_YCBCR422)
timing_bandwidth_kbps = crtc_timing->pix_clk_100hz * 8 * 3 / 10;
else if (crtc_timing->pixel_encoding == PIXEL_ENCODING_YCBCR420)
timing_bandwidth_kbps = crtc_timing->pix_clk_100hz * bits_per_pixel * 3 / 20;
return timing_bandwidth_kbps;
}
struct dc_dsc_policy {
float max_compression_ratio_legacy;
float sst_compression_legacy; // Maximum quality if 0.0
@ -346,7 +286,7 @@ static void get_dsc_bandwidth_range(
struct dc_dsc_bw_range *range)
{
/* native stream bandwidth */
range->stream_kbps = calc_required_bandwidth_for_timing(timing);
range->stream_kbps = dc_bandwidth_in_kbps_from_timing(timing);
/* max dsc target bpp */
range->max_kbps = dsc_round_up(policy->max_target_bpp * timing->pix_clk_100hz);
@ -367,6 +307,13 @@ static void get_dsc_bandwidth_range(
}
}
/* Decides if DSC should be used and calculates target bpp if it should, applying DSC policy.
*
* Returns:
* - 'true' if DSC was required by policy and was successfully applied
* - 'false' if DSC was not necessary (e.g. if uncompressed stream fits 'target_bandwidth'),
* or if it couldn't be applied based on DSC policy.
*/
static bool decide_dsc_target_bpp_x16(
const struct dc_dsc_policy *policy,
const struct dsc_enc_caps *dsc_common_caps,
@ -402,7 +349,6 @@ static bool decide_dsc_target_bpp_x16(
return should_use_dsc;
}
#define MIN_AVAILABLE_SLICES_SIZE 4
static int get_available_dsc_slices(union dsc_enc_slice_caps slice_caps, int *available_slices)
@ -588,7 +534,7 @@ static bool setup_dsc_config(
if (target_bandwidth > 0) {
is_dsc_possible = decide_dsc_target_bpp_x16(&dsc_policy, &dsc_common_caps, target_bandwidth, timing, &target_bpp);
} else if (timing->pix_clk_100hz * 12 <= calc_required_bandwidth_for_timing(timing) * 10) {
} else if (timing->pix_clk_100hz * 12 <= dc_bandwidth_in_kbps_from_timing(timing) * 10) {
/* use 12 target bpp for MST display
* TODO: implement new MST DSC target bpp policy */
target_bpp = 16*12;
@ -841,55 +787,4 @@ bool dc_dsc_compute_config(
timing, dsc_cfg);
return is_dsc_possible;
}
bool dc_check_and_fit_timing_into_bandwidth_with_dsc_legacy(
const struct dc *pDC,
const struct dc_link *link,
struct dc_crtc_timing *timing)
{
int requiredBandwidth_Kbps;
bool stream_fits_into_bandwidth = false;
int total_link_bandwdith_kbps = dc_link_bandwidth_kbps(link, &link->verified_link_cap);
if (link->preferred_link_setting.lane_count != LANE_COUNT_UNKNOWN &&
link->preferred_link_setting.link_rate != LINK_RATE_UNKNOWN) {
total_link_bandwdith_kbps = dc_link_bandwidth_kbps(link, &link->preferred_link_setting);
}
timing->flags.DSC = 0;
requiredBandwidth_Kbps = calc_required_bandwidth_for_timing(timing);
if (total_link_bandwdith_kbps >= requiredBandwidth_Kbps)
stream_fits_into_bandwidth = true;
else {
// There's not enough bandwidth in the link. See if DSC can be used to resolve this.
int link_bandwidth_kbps = link->type == dc_connection_mst_branch ? 0 : total_link_bandwdith_kbps;
stream_fits_into_bandwidth = dc_setup_dsc_in_timing_legacy(pDC, &link->dpcd_caps.dsc_sink_caps, link_bandwidth_kbps, timing);
}
return stream_fits_into_bandwidth;
}
bool dc_setup_dsc_in_timing_legacy(const struct dc *pDC,
const struct dsc_dec_dpcd_caps *dsc_sink_caps,
int available_bandwidth_kbps,
struct dc_crtc_timing *timing)
{
bool isDscOK = false;
struct dsc_enc_caps dsc_enc_caps;
timing->flags.DSC = 0;
get_dsc_enc_caps(pDC, &dsc_enc_caps, timing->pix_clk_100hz);
if (dsc_enc_caps.dsc_version) {
struct dc_dsc_config dscCfg = {0};
isDscOK = setup_dsc_config(dsc_sink_caps, &dsc_enc_caps, available_bandwidth_kbps, timing, &dscCfg);
memcpy(&timing->dsc_cfg, &dscCfg, sizeof(dscCfg));
timing->flags.DSC = isDscOK ? 1 : 0;
}
return isDscOK;
}
#endif /* CONFIG_DRM_AMD_DC_DSC_SUPPORT */