[PATCH 17/26] drm/amd/display: Add debug option for disabling SLDO optimizations

[Fangzhi Zuo]

From: Nicholas Kazlauskas <nicholas.kazlauskas at amd.com>

[Why]
DM can hook this up to disable SLDO optimizations in firmware during
DMCUB initialization for debug purposes.

[How]
Add the option and pass it through dmub_srv.

Reviewed-by: Hansen Dsouza <hansen.dsouza at amd.com>
Signed-off-by: Jerry Zuo <jerry.zuo at amd.com>
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas at amd.com>
---
 drivers/gpu/drm/amd/display/dmub/dmub_srv.h       | 1 +
 drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h   | 3 ++-
 drivers/gpu/drm/amd/display/dmub/src/dmub_dcn35.c | 1 +
 3 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dmub/dmub_srv.h b/drivers/gpu/drm/amd/display/dmub/dmub_srv.h
index 85dcf6b4fe92..6589bb9aea6b 100644
--- a/drivers/gpu/drm/amd/display/dmub/dmub_srv.h
+++ b/drivers/gpu/drm/amd/display/dmub/dmub_srv.h
@@ -299,6 +299,7 @@ struct dmub_srv_hw_params {
 	enum dmub_memory_access_type mem_access_type;
 	enum dmub_ips_disable_type disable_ips;
 	bool disallow_phy_access;
+	bool disable_sldo_opt;
 };
 
 /**
diff --git a/drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h b/drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h
index 605dd9d45167..5ff0a865705f 100644
--- a/drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h
+++ b/drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h
@@ -684,7 +684,8 @@ union dmub_fw_boot_options {
 		uint32_t ips_pg_disable: 1; /* 1 to disable ONO domains power gating*/
 		uint32_t ips_disable: 3; /* options to disable ips support*/
 		uint32_t ips_sequential_ono: 1; /**< 1 to enable sequential ONO IPS sequence */
-		uint32_t reserved : 8; /**< reserved */
+		uint32_t disable_sldo_opt: 1; /**< 1 to disable SLDO optimizations */
+		uint32_t reserved : 7; /**< reserved */
 	} bits; /**< boot bits */
 	uint32_t all; /**< 32-bit access to bits */
 };
diff --git a/drivers/gpu/drm/amd/display/dmub/src/dmub_dcn35.c b/drivers/gpu/drm/amd/display/dmub/src/dmub_dcn35.c
index 80da117356c0..916ed022e96b 100644
--- a/drivers/gpu/drm/amd/display/dmub/src/dmub_dcn35.c
+++ b/drivers/gpu/drm/amd/display/dmub/src/dmub_dcn35.c
@@ -424,6 +424,7 @@ void dmub_dcn35_enable_dmub_boot_options(struct dmub_srv *dmub, const struct dmu
 	boot_options.bits.disable_clk_gate = params->disable_clock_gate;
 	boot_options.bits.ips_disable = params->disable_ips;
 	boot_options.bits.ips_sequential_ono = params->ips_sequential_ono;
+	boot_options.bits.disable_sldo_opt = params->disable_sldo_opt;
 
 	REG_WRITE(DMCUB_SCRATCH14, boot_options.all);
 }
-- 
2.34.1