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drm/amd/display: Fix assert observed when performing dummy p-state check

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[WHY]
V.Active dram clock change workaround need a small modification for DMLv2
to ensure that the dummy p-state check doesn't fail.

Signed-off-by: David Galiffi <David.Galiffi@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
David Galiffi 2019-10-12 16:18:32 -04:00 committed by Alex Deucher
parent 37f1b9f919
commit 47f365645a
3 changed files with 7 additions and 0 deletions
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4
drivers/gpu/drm/amd/display/dc/dml/dcn20/display_mode_vba_20v2.c
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@ -2611,9 +2611,13 @@ static void dml20v2_DISPCLKDPPCLKDCFCLKDeepSleepPrefetchParametersWatermarksAndP
mode_lib->vba.MinActiveDRAMClockChangeMargin
+ mode_lib->vba.DRAMClockChangeLatency;
if (mode_lib->vba.MinActiveDRAMClockChangeMargin > 50) {
mode_lib->vba.DRAMClockChangeWatermark += 25;
mode_lib->vba.DRAMClockChangeSupport[0][0] = dm_dram_clock_change_vactive;
} else if (mode_lib->vba.DummyPStateCheck &&
mode_lib->vba.MinActiveDRAMClockChangeMargin > 0) {
mode_lib->vba.DRAMClockChangeSupport[0][0] = dm_dram_clock_change_vactive;
} else {
if (mode_lib->vba.SynchronizedVBlank || mode_lib->vba.NumberOfActivePlanes == 1) {
mode_lib->vba.DRAMClockChangeSupport[0][0] = dm_dram_clock_change_vblank;

2
drivers/gpu/drm/amd/display/dc/dml/display_mode_vba.c
View File

@ -222,6 +222,8 @@ static void fetch_socbb_params(struct display_mode_lib *mode_lib)
mode_lib->vba.SRExitTime = soc->sr_exit_time_us;
mode_lib->vba.SREnterPlusExitTime = soc->sr_enter_plus_exit_time_us;
mode_lib->vba.DRAMClockChangeLatency = soc->dram_clock_change_latency_us;
mode_lib->vba.DummyPStateCheck = soc->dram_clock_change_latency_us == soc->dummy_pstate_latency_us;
mode_lib->vba.Downspreading = soc->downspread_percent;
mode_lib->vba.DRAMChannelWidth = soc->dram_channel_width_bytes; // new!
mode_lib->vba.FabricDatapathToDCNDataReturn = soc->fabric_datapath_to_dcn_data_return_bytes; // new!

1
drivers/gpu/drm/amd/display/dc/dml/display_mode_vba.h
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@ -155,6 +155,7 @@ struct vba_vars_st {
double UrgentLatencySupportUsChroma;
unsigned int DSCFormatFactor;
bool DummyPStateCheck;
bool PrefetchModeSupported;
enum self_refresh_affinity AllowDRAMSelfRefreshOrDRAMClockChangeInVblank; // Mode Support only
double XFCRemoteSurfaceFlipDelay;