From: Michael Strauss <michael.stra...@amd.com>
[WHY]
dprefclk is improperly read due to incorrect units used.
Causes an audio clock to be improperly set, making audio
non-functional and videos play back too fast
[HOW]
Scale dprefclk value from MHz to KHz (multiply by 1000)
to ensure that dprefclk_khz is in correct units
Signed-off-by: Michael Strauss <michael.stra...@amd.com>
Acked-by: Bhawanpreet Lakha <bhawanpreet.la...@amd.com>
---
.../drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c | 15 +++++++--------
1 file changed, 7 insertions(+), 8 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c
b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c
index 93e46e376bb1..fb8aa9436bf0 100644
--- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c
+++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn21/rn_clk_mgr.c
@@ -377,7 +377,7 @@ void rn_get_clk_states(struct clk_mgr *clk_mgr_base, struct
clk_states *s)
rn_dump_clk_registers(&sb, clk_mgr_base, &log_info);
- s->dprefclk_khz = sb.dprefclk;
+ s->dprefclk_khz = sb.dprefclk * 1000;
}
void rn_enable_pme_wa(struct clk_mgr *clk_mgr_base)
@@ -633,16 +633,15 @@ void rn_clk_mgr_construct(
clk_mgr->dentist_vco_freq_khz = 3600000;
rn_dump_clk_registers(&s, &clk_mgr->base, &log_info);
- clk_mgr->base.dprefclk_khz = s.dprefclk;
-
- if (clk_mgr->base.dprefclk_khz != 600000) {
- clk_mgr->base.dprefclk_khz = 600000;
- ASSERT(1); //TODO: Renoir follow up.
- }
+ /* Convert dprefclk units from MHz to KHz */
+ /* Value already divided by 10, some resolution lost */
+ clk_mgr->base.dprefclk_khz = s.dprefclk * 1000;
/* in case we don't get a value from the register, use default
*/
- if (clk_mgr->base.dprefclk_khz == 0)
+ if (clk_mgr->base.dprefclk_khz == 0) {
+ ASSERT(clk_mgr->base.dprefclk_khz == 600000);
clk_mgr->base.dprefclk_khz = 600000;
+ }
}
dce_clock_read_ss_info(clk_mgr);
--
2.17.1
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