From 0488a56465877a48596a874bc0f4f31d6fbf334e Mon Sep 17 00:00:00 2001 From: Eric Yang Date: Sat, 29 Jun 2019 16:02:37 -0400 Subject: [PATCH] drm/amd/display: fix mpcc assert condition [Why] In DCN2x asic, the MPCC status register definition changed, and our logic for assert is incorrect. disabled is valid state, where we should see idle and not busy, where as in not disabled state, we should see not idle. [How] Change assert condition to be more sensible. Signed-off-by: Eric Yang Reviewed-by: Yongqiang Sun Acked-by: Leo Li Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/dc/dcn20/dcn20_mpc.c | 23 +++++++++++------------ 1 file changed, 11 insertions(+), 12 deletions(-) diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_mpc.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_mpc.c index f4d3008..67f0128 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_mpc.c +++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_mpc.c @@ -446,23 +446,22 @@ void mpc2_assert_mpcc_idle_before_connect(struct mpc *mpc, int mpcc_id) { struct dcn20_mpc *mpc20 = TO_DCN20_MPC(mpc); unsigned int top_sel, mpc_busy, mpc_idle, mpc_disabled; - REG_GET(MPCC_STATUS[mpcc_id], MPCC_DISABLED, &mpc_disabled); - - if (mpc_disabled) { - ASSERT(0); - return; - } REG_GET(MPCC_TOP_SEL[mpcc_id], MPCC_TOP_SEL, &top_sel); - if (top_sel == 0xf) { - REG_GET_2(MPCC_STATUS[mpcc_id], - MPCC_BUSY, &mpc_busy, - MPCC_IDLE, &mpc_idle); + REG_GET_3(MPCC_STATUS[mpcc_id], + MPCC_BUSY, &mpc_busy, + MPCC_IDLE, &mpc_idle, + MPCC_DISABLED, &mpc_disabled); - ASSERT(mpc_busy == 0); - ASSERT(mpc_idle == 1); + if (top_sel == 0xf) { + ASSERT(!mpc_busy); + ASSERT(mpc_idle); + ASSERT(mpc_disabled); + } else { + ASSERT(!mpc_disabled); + ASSERT(!mpc_idle); } } -- 2.7.4