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drm/amd/display: update DCN2 uclk switch time 

[why]
value commited to by HW team is going to be higher
than pre-silicon, and will cause underflow if driver not
updated

[how]
update hardcoded value, update pstate switching logic
to fix case where with long uclk time we won't allow switch
even when we should

Signed-off-by: Jun Lei <Jun.Lei@amd.com>
Reviewed-by: Eric Yang <eric.yang2@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Jun Lei 2019-05-27 14:15:27 -04:00 committed by Alex Deucher
parent cf020d49b3
commit 6e17b5b8a8
2 changed files with 9 additions and 5 deletions
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8
drivers/gpu/drm/amd/display/dc/clk_mgr/dcn20/dcn20_clk_mgr.c
View File

@ -195,12 +195,10 @@ void dcn2_update_clocks(struct clk_mgr *clk_mgr_base,
pp_smu->set_hard_min_socclk_by_freq(&pp_smu->pp_smu, clk_mgr_base->clks.socclk_khz / 1000);
}
if (!safe_to_lower && pp_smu && pp_smu->set_pstate_handshake_support) {
clk_mgr_base->clks.p_state_change_support = false;
pp_smu->set_pstate_handshake_support(&pp_smu->pp_smu, false);
} else if (safe_to_lower && pp_smu && pp_smu->set_pstate_handshake_support) {
if (should_update_pstate_support(safe_to_lower, new_clocks->p_state_change_support, clk_mgr_base->clks.p_state_change_support)) {
clk_mgr_base->clks.p_state_change_support = new_clocks->p_state_change_support;
pp_smu->set_pstate_handshake_support(&pp_smu->pp_smu, clk_mgr_base->clks.p_state_change_support);
if (pp_smu && pp_smu->set_pstate_handshake_support)
pp_smu->set_pstate_handshake_support(&pp_smu->pp_smu, clk_mgr_base->clks.p_state_change_support);
}
if (should_set_clock(safe_to_lower, new_clocks->dramclk_khz, clk_mgr_base->clks.dramclk_khz)) {

6
drivers/gpu/drm/amd/display/dc/inc/hw/clk_mgr_internal.h
View File

@ -274,6 +274,12 @@ static inline bool should_set_clock(bool safe_to_lower, int calc_clk, int cur_cl
return ((safe_to_lower && calc_clk < cur_clk) || calc_clk > cur_clk);
}
static inline bool should_update_pstate_support(bool safe_to_lower, bool calc_support, bool cur_support)
{
// Whenever we are transitioning pstate support, we always want to notify prior to committing state
return (calc_support != cur_support) ? !safe_to_lower : false;
}
int clk_mgr_helper_get_active_display_cnt(
struct dc *dc,
struct dc_state *context);