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drm/amd/powerplay: fix possible hang with 3+ 4K monitors 

If DAL requires to force MCLK high, the FCLK will be
forced to high also.

Signed-off-by: Evan Quan <evan.quan@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Evan Quan 2019-03-26 17:57:53 +08:00 committed by Alex Deucher
parent aaaba51bf1
commit db64a2f43c
1 changed files with 9 additions and 1 deletions
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10
drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c
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@ -3470,6 +3470,7 @@ static int vega20_apply_clocks_adjust_rules(struct pp_hwmgr *hwmgr)
struct vega20_single_dpm_table *dpm_table;
bool vblank_too_short = false;
bool disable_mclk_switching;
bool disable_fclk_switching;
uint32_t i, latency;
disable_mclk_switching = ((1 < hwmgr->display_config->num_display) &&
@ -3545,13 +3546,20 @@ static int vega20_apply_clocks_adjust_rules(struct pp_hwmgr *hwmgr)
if (hwmgr->display_config->nb_pstate_switch_disable)
dpm_table->dpm_state.hard_min_level = dpm_table->dpm_levels[dpm_table->count - 1].value;
if ((disable_mclk_switching &&
(dpm_table->dpm_state.hard_min_level == dpm_table->dpm_levels[dpm_table->count - 1].value)) ||
hwmgr->display_config->min_mem_set_clock / 100 >= dpm_table->dpm_levels[dpm_table->count - 1].value)
disable_fclk_switching = true;
else
disable_fclk_switching = false;
/* fclk */
dpm_table = &(data->dpm_table.fclk_table);
dpm_table->dpm_state.soft_min_level = dpm_table->dpm_levels[0].value;
dpm_table->dpm_state.soft_max_level = VG20_CLOCK_MAX_DEFAULT;
dpm_table->dpm_state.hard_min_level = dpm_table->dpm_levels[0].value;
dpm_table->dpm_state.hard_max_level = VG20_CLOCK_MAX_DEFAULT;
if (hwmgr->display_config->nb_pstate_switch_disable)
if (hwmgr->display_config->nb_pstate_switch_disable || disable_fclk_switching)
dpm_table->dpm_state.soft_min_level = dpm_table->dpm_levels[dpm_table->count - 1].value;
/* vclk */