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drm/amd/display: Add debug option to force fclk request

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[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 <hugo.hu@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Hugo Hu 2018-11-21 14:34:10 +08:00 • committed by Alex Deucher
parent 987741af33
commit 51ba137ef2
2 changed files with 5 additions and 0 deletions
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1
drivers/gpu/drm/amd/display/dc/dc.h
View file

@ -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 {

4
drivers/gpu/drm/amd/display/dc/dcn10/dcn10_clk_mgr.c
View file

@ -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;