diff options
| author | Leo Li <sunpeng.li@amd.com> | 2025-11-03 11:14:59 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2026-02-12 15:12:26 -0500 |
| commit | 318917e1d8ecc89f820f4fabf79935f4fed718cd (patch) | |
| tree | 99f189d35fe686476fbc99927874a4840c754166 | |
| parent | 4d687d06c3409e4e041c65645eab10520bd78afe (diff) | |
| download | linux-318917e1d8ecc89f820f4fabf79935f4fed718cd.tar.gz linux-318917e1d8ecc89f820f4fabf79935f4fed718cd.zip | |
drm/amd/display: Increase DCN35 SR enter/exit latency
[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 <nicholas.kazlauskas@amd.com>
Signed-off-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Tom Chung <chiahsuan.chung@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/clk_mgr/dcn35/dcn35_clk_mgr.c | 16 | ||||
| -rw-r--r-- | drivers/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, |