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drm/amd/display: Check for null fclk voltage when parsing clock table

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[WHY]
In cases where a clock table is malformed such that fclk entries have
frequencies but not voltages listed, we don't catch the error and set
clocks to 0 instead of using hardcoded values as we should.

[HOW]
Add check for clock tables fclk entry's voltage as well

Signed-off-by: Michael Strauss <michael.strauss@amd.com>
Reviewed-by: Eric Yang <eric.yang2@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
This commit is contained in:
Michael Strauss 2020-04-05 16:41:12 -04:00 committed by Alex Deucher
parent 6dbebf4da3
commit 72f5b5a308
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c
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@ -643,7 +643,7 @@ static void rn_clk_mgr_helper_populate_bw_params(struct clk_bw_params *bw_params
/* Find lowest DPM, FCLK is filled in reverse order*/
for (i = PP_SMU_NUM_FCLK_DPM_LEVELS - 1; i >= 0; i--) {
if (clock_table->FClocks[i].Freq != 0) {
if (clock_table->FClocks[i].Freq != 0 && clock_table->FClocks[i].Vol != 0) {
j = i;
break;
}