From: Dmytro Laktyushkin <Dmytro.Laktyushkin@xxxxxxx> [ Upstream commit 3159d41db3a04330c31ece32f8b29752fc114848 ] Check before programming the register since it isn't present on all IPs using this code. Signed-off-by: Dmytro Laktyushkin <Dmytro.Laktyushkin@xxxxxxx> Reviewed-by: Eric Bernstein <Eric.Bernstein@xxxxxxx> Acked-by: Aurabindo Pillai <aurabindo.pillai@xxxxxxx> Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c index e933f6a369f92..083c42e521f5c 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c +++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c @@ -2015,7 +2015,8 @@ static void dcn20_fpga_init_hw(struct dc *dc) REG_UPDATE(DCHUBBUB_GLOBAL_TIMER_CNTL, DCHUBBUB_GLOBAL_TIMER_REFDIV, 2); REG_UPDATE(DCHUBBUB_GLOBAL_TIMER_CNTL, DCHUBBUB_GLOBAL_TIMER_ENABLE, 1); - REG_WRITE(REFCLK_CNTL, 0); + if (REG(REFCLK_CNTL)) + REG_WRITE(REFCLK_CNTL, 0); // -- 2.20.1
