drm/amd/display: initialize p_state to proper value

[why]
On some modes SMU will be in infinite loop state at boot, this is
because driver assumes p_state_support is false, but this is the
opposite of the assumed boot state by SMU.  we optimize away
notifying SMU about no pstate, and so they will get stuck

[how]
when we init clk manager, init pstate to true, so it matches driver load
assumption

Signed-off-by: Jun Lei <Jun.Lei@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>

diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn20/dcn20_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn20/dcn20_clk_mgr.c
index 08a774fc7b67f11a59fcac2e340f20dd4c4a6d3e..740f5db22bb5b260b4ea8a0364e5cd05c9e0c3d2 100644 (file)
--- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn20/dcn20_clk_mgr.c
+++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn20/dcn20_clk_mgr.c
@@ -301,6 +301,8 @@ void dcn2_update_clocks_fpga(struct clk_mgr *clk_mgr,
 void dcn2_init_clocks(struct clk_mgr *clk_mgr)
 {
        memset(&(clk_mgr->clks), 0, sizeof(struct dc_clocks));
+       // Assumption is that boot state always supports pstate
+       clk_mgr->clks.p_state_change_support = true;
 }
 
 void dcn2_enable_pme_wa(struct clk_mgr *clk_mgr_base)