From: Alvin Lee alvin.lee2@amd.com
[ Upstream commit 7e60ab4eb3e4ba2adac46d737fdbbc5732bebd58 ]
[Description] - Previously we wanted to apply extra 60us of prefetch for min DCFCLK (200Mhz), but DCFCLK can be calculated to be 201Mhz which underflows also without the extra prefetch - Instead, apply the the extra 60us prefetch for any DCFCLK freq <= 300Mhz
Reviewed-by: Nevenko Stupar nevenko.stupar@amd.com Reviewed-by: Jun Lei jun.lei@amd.com Acked-by: Tom Chung chiahsuan.chung@amd.com Signed-off-by: Alvin Lee alvin.lee2@amd.com Tested-by: Daniel Wheeler daniel.wheeler@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Sasha Levin sashal@kernel.org --- .../gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_32.c | 4 ++-- .../gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_32.h | 2 +- 2 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_32.c b/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_32.c index 2bb768413c92a..19f55657272e4 100644 --- a/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_32.c +++ b/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_32.c @@ -808,7 +808,7 @@ static void DISPCLKDPPCLKDCFCLKDeepSleepPrefetchParametersWatermarksAndPerforman v->SwathHeightC[k], TWait, (v->DRAMSpeedPerState[mode_lib->vba.VoltageLevel] <= MEM_STROBE_FREQ_MHZ || - v->DCFCLKPerState[mode_lib->vba.VoltageLevel] <= MIN_DCFCLK_FREQ_MHZ) ? + v->DCFCLKPerState[mode_lib->vba.VoltageLevel] <= DCFCLK_FREQ_EXTRA_PREFETCH_REQ_MHZ) ? mode_lib->vba.ip.min_prefetch_in_strobe_us : 0, /* Output */ &v->DSTXAfterScaler[k], @@ -3289,7 +3289,7 @@ void dml32_ModeSupportAndSystemConfigurationFull(struct display_mode_lib *mode_l v->swath_width_chroma_ub_this_state[k], v->SwathHeightYThisState[k], v->SwathHeightCThisState[k], v->TWait, - (v->DRAMSpeedPerState[i] <= MEM_STROBE_FREQ_MHZ || v->DCFCLKState[i][j] <= MIN_DCFCLK_FREQ_MHZ) ? + (v->DRAMSpeedPerState[i] <= MEM_STROBE_FREQ_MHZ || v->DCFCLKState[i][j] <= DCFCLK_FREQ_EXTRA_PREFETCH_REQ_MHZ) ? mode_lib->vba.ip.min_prefetch_in_strobe_us : 0,
/* Output */ diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_32.h b/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_32.h index e92eee2c664d0..a475775bc3894 100644 --- a/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_32.h +++ b/drivers/gpu/drm/amd/display/dc/dml/dcn32/display_mode_vba_32.h @@ -52,7 +52,7 @@ #define BPP_BLENDED_PIPE 0xffffffff
#define MEM_STROBE_FREQ_MHZ 1600 -#define MIN_DCFCLK_FREQ_MHZ 200 +#define DCFCLK_FREQ_EXTRA_PREFETCH_REQ_MHZ 300 #define MEM_STROBE_MAX_DELIVERY_TIME_US 60.0
struct display_mode_lib;