From: Leo Li <[email protected]> [Why & How]
On Framework laptops with DDR5 modules, underflow can be observed. It's unclear why it only occurs on specific desktop contents. However, increasing enter/exit latencies by 3us seems to resolve it. Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/4463 Reviewed-by: Nicholas Kazlauskas <[email protected]> Signed-off-by: Leo Li <[email protected]> Signed-off-by: Tom Chung <[email protected]> --- .../amd/display/dc/clk_mgr/dcn35/dcn35_clk_mgr.c | 16 ++++++++-------- .../gpu/drm/amd/display/dc/dml/dcn35/dcn35_fpu.c | 4 ++-- 2 files changed, 10 insertions(+), 10 deletions(-) diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn35/dcn35_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn35/dcn35_clk_mgr.c index 7abe6811e4df..6fc524752613 100644 --- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn35/dcn35_clk_mgr.c +++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn35/dcn35_clk_mgr.c @@ -766,32 +766,32 @@ static struct wm_table ddr5_wm_table = { .wm_inst = WM_A, .wm_type = WM_TYPE_PSTATE_CHG, .pstate_latency_us = 11.72, - .sr_exit_time_us = 28.0, - .sr_enter_plus_exit_time_us = 30.0, + .sr_exit_time_us = 31.0, + .sr_enter_plus_exit_time_us = 33.0, .valid = true, }, { .wm_inst = WM_B, .wm_type = WM_TYPE_PSTATE_CHG, .pstate_latency_us = 11.72, - .sr_exit_time_us = 28.0, - .sr_enter_plus_exit_time_us = 30.0, + .sr_exit_time_us = 31.0, + .sr_enter_plus_exit_time_us = 33.0, .valid = true, }, { .wm_inst = WM_C, .wm_type = WM_TYPE_PSTATE_CHG, .pstate_latency_us = 11.72, - .sr_exit_time_us = 28.0, - .sr_enter_plus_exit_time_us = 30.0, + .sr_exit_time_us = 31.0, + .sr_enter_plus_exit_time_us = 33.0, .valid = true, }, { .wm_inst = WM_D, .wm_type = WM_TYPE_PSTATE_CHG, .pstate_latency_us = 11.72, - .sr_exit_time_us = 28.0, - .sr_enter_plus_exit_time_us = 30.0, + .sr_exit_time_us = 31.0, + .sr_enter_plus_exit_time_us = 33.0, .valid = true, }, } diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn35/dcn35_fpu.c b/drivers/gpu/drm/amd/display/dc/dml/dcn35/dcn35_fpu.c index 817a370e80a7..8a177d5ae213 100644 --- a/drivers/gpu/drm/amd/display/dc/dml/dcn35/dcn35_fpu.c +++ b/drivers/gpu/drm/amd/display/dc/dml/dcn35/dcn35_fpu.c @@ -164,8 +164,8 @@ struct _vcs_dpi_soc_bounding_box_st dcn3_5_soc = { }, }, .num_states = 5, - .sr_exit_time_us = 28.0, - .sr_enter_plus_exit_time_us = 30.0, + .sr_exit_time_us = 31.0, + .sr_enter_plus_exit_time_us = 33.0, .sr_exit_z8_time_us = 250.0, .sr_enter_plus_exit_z8_time_us = 350.0, .fclk_change_latency_us = 24.0, -- 2.43.0
