[AMD Official Use Only - Internal Distribution Only] Reviewed-by: Hersen Wu <[email protected]>
-----Original Message----- From: Vishwakarma, Pratik <[email protected]> Sent: Monday, November 9, 2020 12:39 AM To: Wu, Hersen <[email protected]>; [email protected] Cc: Vishwakarma, Pratik <[email protected]> Subject: [PATCH] drm/amd/display: Tune fclk for 4K OLED display [Why] On 4K SKU, in DC mode, there is a visible slowness observed on system compared to AC mode. [How] Tuning min fclk up by 2% resolved this issue. Signed-off-by: Pratik Vishwakarma <[email protected]> --- .../gpu/drm/amd/display/dc/clk_mgr/dcn10/rv1_clk_mgr.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn10/rv1_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn10/rv1_clk_mgr.c index 832a43053420..ead009628c48 100644 --- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn10/rv1_clk_mgr.c +++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn10/rv1_clk_mgr.c @@ -210,6 +210,7 @@ static void rv1_update_clocks(struct clk_mgr *clk_mgr_base, bool send_request_to_increase = false; bool send_request_to_lower = false; int display_count; + int i, clock_factor = 0; bool enter_display_off = false; @@ -217,6 +218,12 @@ static void rv1_update_clocks(struct clk_mgr *clk_mgr_base, pp_smu = &clk_mgr->pp_smu->rv_funcs; + for (i = 0; i < context->stream_count; i++) { + if (context->streams[i]->timing.h_total > 3840 + || context->streams[i]->timing.v_total > 2160) + clock_factor = 2; + } + display_count = clk_mgr_helper_get_active_display_cnt(dc, context); if (display_count == 0) @@ -302,7 +309,7 @@ static void rv1_update_clocks(struct clk_mgr *clk_mgr_base, (new_clocks->dcfclk_deep_sleep_khz + 999) / 1000); } else { pp_smu->set_hard_min_fclk_by_freq(&pp_smu->pp_smu, - new_clocks->fclk_khz / 1000); + ((new_clocks->fclk_khz / 1000) * (100 + clock_factor)) / 100); pp_smu->set_hard_min_dcfclk_by_freq(&pp_smu->pp_smu, new_clocks->dcfclk_khz / 1000); pp_smu->set_min_deep_sleep_dcfclk(&pp_smu->pp_smu, -- 2.25.1 _______________________________________________ amd-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/amd-gfx
