From 7c7d80e927909e440b7ab527b5f9e31b9412a25b Mon Sep 17 00:00:00 2001
From: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Date: Wed, 11 Dec 2019 21:26:40 -0500
Subject: drm/amd/display: Soft reset DMUIF during DMUB reset
Git-commit: 1295524e6fee9a978ea2d97a0efc269252b07487
Patch-mainline: v5.6-rc1
References: jsc#SLE-12680, jsc#SLE-12880, jsc#SLE-12882, jsc#SLE-12883, jsc#SLE-13496, jsc#SLE-15322
[Why]
We need to ensure that the DMUIF in MMHUBBUB is also in reset so we
aren't generating requests while the DMCUB is in reset.
[How]
Set DMUIF_SOFT_RESET=1 on reset and DMUIF_SOFT_RESET=0 on reset
release.
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/amd/display/dmub/src/dmub_dcn20.c | 2 ++
drivers/gpu/drm/amd/display/dmub/src/dmub_dcn20.h | 6 ++++--
2 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dmub/src/dmub_dcn20.c b/drivers/gpu/drm/amd/display/dmub/src/dmub_dcn20.c
index f45e14ada685..cd51c6138894 100644
--- a/drivers/gpu/drm/amd/display/dmub/src/dmub_dcn20.c
+++ b/drivers/gpu/drm/amd/display/dmub/src/dmub_dcn20.c
@@ -66,10 +66,12 @@ void dmub_dcn20_reset(struct dmub_srv *dmub)
{
REG_UPDATE(DMCUB_CNTL, DMCUB_SOFT_RESET, 1);
REG_UPDATE(DMCUB_CNTL, DMCUB_ENABLE, 0);
+ REG_UPDATE(MMHUBBUB_SOFT_RESET, DMUIF_SOFT_RESET, 1);
}
void dmub_dcn20_reset_release(struct dmub_srv *dmub)
{
+ REG_UPDATE(MMHUBBUB_SOFT_RESET, DMUIF_SOFT_RESET, 0);
REG_WRITE(DMCUB_SCRATCH15, dmub->psp_version & 0x001100FF);
REG_UPDATE_2(DMCUB_CNTL, DMCUB_ENABLE, 1, DMCUB_TRACEPORT_EN, 1);
REG_UPDATE(DMCUB_CNTL, DMCUB_SOFT_RESET, 0);
diff --git a/drivers/gpu/drm/amd/display/dmub/src/dmub_dcn20.h b/drivers/gpu/drm/amd/display/dmub/src/dmub_dcn20.h
index 68af9b190288..53bfd4da69ad 100644
--- a/drivers/gpu/drm/amd/display/dmub/src/dmub_dcn20.h
+++ b/drivers/gpu/drm/amd/display/dmub/src/dmub_dcn20.h
@@ -91,7 +91,8 @@ struct dmub_srv;
DMUB_SR(DMCUB_SCRATCH13) \
DMUB_SR(DMCUB_SCRATCH14) \
DMUB_SR(DMCUB_SCRATCH15) \
- DMUB_SR(CC_DC_PIPE_DIS)
+ DMUB_SR(CC_DC_PIPE_DIS) \
+ DMUB_SR(MMHUBBUB_SOFT_RESET)
#define DMUB_COMMON_FIELDS() \
DMUB_SF(DMCUB_CNTL, DMCUB_ENABLE) \
@@ -119,7 +120,8 @@ struct dmub_srv;
DMUB_SF(DMCUB_REGION3_CW7_TOP_ADDRESS, DMCUB_REGION3_CW7_ENABLE) \
DMUB_SF(DMCUB_REGION4_TOP_ADDRESS, DMCUB_REGION4_TOP_ADDRESS) \
DMUB_SF(DMCUB_REGION4_TOP_ADDRESS, DMCUB_REGION4_ENABLE) \
- DMUB_SF(CC_DC_PIPE_DIS, DC_DMCUB_ENABLE)
+ DMUB_SF(CC_DC_PIPE_DIS, DC_DMCUB_ENABLE) \
+ DMUB_SF(MMHUBBUB_SOFT_RESET, DMUIF_SOFT_RESET)
struct dmub_srv_common_reg_offset {
#define DMUB_SR(reg) uint32_t reg;
--
2.28.0