From: Hugo Hu Date: Wed, 21 Nov 2018 06:34:10 +0000 (+0800) Subject: drm/amd/display: Add debug option to force fclk request X-Git-Tag: v5.1-rc1~117^2~20^2~155 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=51ba137ef226255bb13578da13e8a9030c5ad019;p=linux.git drm/amd/display: Add debug option to force fclk request [Why] So that we can adjust fclk for debugging purposes. [How] Add option to force adjust fclk request to pplib. Signed-off-by: Hugo Hu Reviewed-by: Tony Cheng Acked-by: Leo Li Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h index b4ad48b0bff3..da08c7122497 100644 --- a/drivers/gpu/drm/amd/display/dc/dc.h +++ b/drivers/gpu/drm/amd/display/dc/dc.h @@ -255,6 +255,7 @@ struct dc_debug_options { bool scl_reset_length10; bool hdmi20_disable; bool skip_detection_link_training; + unsigned int force_fclk_khz; }; struct dc_debug_data { diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_clk_mgr.c index 54abedbf1b43..c39db5bfa7cf 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_clk_mgr.c +++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_clk_mgr.c @@ -218,6 +218,7 @@ static void dcn1_update_clocks(struct clk_mgr *clk_mgr, bool safe_to_lower) { struct dc *dc = clk_mgr->ctx->dc; + struct dc_debug_options *debug = &dc->debug; struct dc_clocks *new_clocks = &context->bw.dcn.clk; struct pp_smu_display_requirement_rv *smu_req_cur = &dc->res_pool->pp_smu_req; @@ -261,6 +262,9 @@ static void dcn1_update_clocks(struct clk_mgr *clk_mgr, } // F Clock + if (debug->force_fclk_khz != 0) + new_clocks->fclk_khz = debug->force_fclk_khz; + if (should_set_clock(safe_to_lower, new_clocks->fclk_khz, clk_mgr->clks.fclk_khz)) { clk_mgr->clks.fclk_khz = new_clocks->fclk_khz; smu_req.hard_min_fclk_mhz = new_clocks->fclk_khz / 1000;