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drm/amd/display: Add interface to adjust DSC max target bpp limit

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[Why]
For some use cases we need to be able to adjust the maximum target bpp
allowed by DSC policy.

[How]
New interface dc_dsc_policy_set_max_target_bpp_limit

Signed-off-by: Joshua Aberback <joshua.aberback@amd.com>
Reviewed-by: Nikola Cornij <Nikola.Cornij@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Joshua Aberback 2019-11-19 18:46:26 -05:00 committed by Alex Deucher
parent 663bfef0da
commit 6026be6961
2 changed files with 13 additions and 3 deletions
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2
drivers/gpu/drm/amd/display/dc/dc_dsc.h
View File

@ -77,4 +77,6 @@ bool dc_dsc_compute_config(
void dc_dsc_get_policy_for_timing(const struct dc_crtc_timing *timing,
struct dc_dsc_policy *policy);
void dc_dsc_policy_set_max_target_bpp_limit(uint32_t limit);
#endif

14
drivers/gpu/drm/amd/display/dc/dsc/dc_dsc.c
View File

@ -29,6 +29,9 @@
/* This module's internal functions */
/* default DSC policy target bitrate limit is 16bpp */
static uint32_t dsc_policy_max_target_bpp_limit = 16;
static uint32_t dc_dsc_bandwidth_in_kbps_from_timing(
const struct dc_crtc_timing *timing)
{
@ -951,7 +954,12 @@ void dc_dsc_get_policy_for_timing(const struct dc_crtc_timing *timing, struct dc
default:
return;
}
/* internal upper limit to 16 bpp */
if (policy->max_target_bpp > 16)
policy->max_target_bpp = 16;
/* internal upper limit, default 16 bpp */
if (policy->max_target_bpp > dsc_policy_max_target_bpp_limit)
policy->max_target_bpp = dsc_policy_max_target_bpp_limit;
}
void dc_dsc_policy_set_max_target_bpp_limit(uint32_t limit)
{
dsc_policy_max_target_bpp_limit = limit;
}