From: Nicholas Susanto <[email protected]> [Why]
Causes hard hangs when resuming after display off on extended/duplicate modes [How] Set the min dispclk to 50Mhz for DCN35 Reviewed-by: Nicholas Kazlauskas <[email protected]> Signed-off-by: Nicholas Susanto <[email protected]> Signed-off-by: Roman Li <[email protected]> --- drivers/gpu/drm/amd/display/dc/clk_mgr/dcn35/dcn35_clk_mgr.c | 3 +++ drivers/gpu/drm/amd/display/dc/resource/dcn35/dcn35_resource.c | 1 + 2 files changed, 4 insertions(+) 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 e2d906327e2e..0ce9b40dfc68 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 @@ -305,6 +305,9 @@ void dcn35_update_clocks(struct clk_mgr *clk_mgr_base, if (new_clocks->dtbclk_en && !new_clocks->ref_dtbclk_khz) new_clocks->ref_dtbclk_khz = 600000; + if (dc->debug.min_disp_clk_khz > 0 && new_clocks->dispclk_khz < dc->debug.min_disp_clk_khz) + new_clocks->dispclk_khz = dc->debug.min_disp_clk_khz; + /* * if it is safe to lower, but we are already in the lower state, we don't have to do anything * also if safe to lower is false, we just go in the higher state diff --git a/drivers/gpu/drm/amd/display/dc/resource/dcn35/dcn35_resource.c b/drivers/gpu/drm/amd/display/dc/resource/dcn35/dcn35_resource.c index 5f3705f97bd7..46ad684fe192 100644 --- a/drivers/gpu/drm/amd/display/dc/resource/dcn35/dcn35_resource.c +++ b/drivers/gpu/drm/amd/display/dc/resource/dcn35/dcn35_resource.c @@ -786,6 +786,7 @@ static const struct dc_debug_options debug_defaults_drv = { .disable_dmub_reallow_idle = false, .static_screen_wait_frames = 2, .disable_timeout = true, + .min_disp_clk_khz = 50000, }; static const struct dc_panel_config panel_config_defaults = { -- 2.34.1
