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drm/amd/display: Remove additional FEC link bandwidth reduction 

[why]
This is now done in the original link bandwidth calculation and DSC
must not do this anymore.

[how]
Remove the line of code that should have been removed when transition
to correctly applying FEC overhead was made.

Signed-off-by: Nikola Cornij <nikola.cornij@amd.com>
Reviewed-by: Wenjing Liu <Wenjing.Liu@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Nikola Cornij 2019-03-27 18:54:19 -04:00 committed by Alex Deucher
parent b7d39c5878
commit 87029eb4fa
1 changed files with 2 additions and 3 deletions
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5
drivers/gpu/drm/amd/display/dc/dsc/dc_dsc.c
View File

@ -311,19 +311,18 @@ static void get_dsc_bandwidth_range(
* *
* Returns: * Returns:
* - 'true' if DSC was required by policy and was successfully applied * - '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'), * - 'false' if DSC was not necessary (e.g. if uncompressed stream fits 'target_bandwidth_kbps'),
* or if it couldn't be applied based on DSC policy. * or if it couldn't be applied based on DSC policy.
*/ */
static bool decide_dsc_target_bpp_x16( static bool decide_dsc_target_bpp_x16(
const struct dc_dsc_policy *policy, const struct dc_dsc_policy *policy,
const struct dsc_enc_caps *dsc_common_caps, const struct dsc_enc_caps *dsc_common_caps,
const int target_bandwidth, const int target_bandwidth_kbps,
const struct dc_crtc_timing *timing, const struct dc_crtc_timing *timing,
int *target_bpp_x16) int *target_bpp_x16)
{ {
bool should_use_dsc = false; bool should_use_dsc = false;
struct dc_dsc_bw_range range; struct dc_dsc_bw_range range;
float target_bandwidth_kbps = target_bandwidth * 0.97f; // 3% overhead for FEC
memset(&range, 0, sizeof(range)); memset(&range, 0, sizeof(range));