[PATCH 08/32] drm/amd/display: remove compbuf size wait

[Rodrigo Siqueira]

From: Dmytro Laktyushkin <Dmytro.Laktyushkin at amd.com>

This tends to take miliseconds in certain scenarios and we'd rather not
wait that long. Due to how this interacts with det size update and
locking waiting should not be necessary as compbuf updates before
unlock.

Add a watch for config error instead as that is something we actually do
care about.

Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira at amd.com>
Signed-off-by: Dmytro Laktyushkin <Dmytro.Laktyushkin at amd.com>
---
 drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubbub.h | 1 +
 drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hubbub.c | 2 +-
 drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hubbub.h | 1 +
 3 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubbub.h b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubbub.h
index 32fb22daf4a2..39485bdeb90e 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubbub.h
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubbub.h
@@ -319,6 +319,7 @@ struct dcn_hubbub_registers {
 		type DET3_SIZE_CURRENT;\
 		type COMPBUF_SIZE;\
 		type COMPBUF_SIZE_CURRENT;\
+		type CONFIG_ERROR;\
 		type COMPBUF_RESERVED_SPACE_64B;\
 		type COMPBUF_RESERVED_SPACE_ZS;\
 		type DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_Z8_A;\
diff --git a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hubbub.c b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hubbub.c
index b5a7fa67958b..2043528d3490 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hubbub.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hubbub.c
@@ -124,8 +124,8 @@ static void dcn31_program_compbuf_size(struct hubbub *hubbub, unsigned int compb
 		ASSERT(hubbub2->det0_size + hubbub2->det1_size + hubbub2->det2_size
 				+ hubbub2->det3_size + compbuf_size_segments <= hubbub2->crb_size_segs);
 		REG_UPDATE(DCHUBBUB_COMPBUF_CTRL, COMPBUF_SIZE, compbuf_size_segments);
-		REG_WAIT(DCHUBBUB_COMPBUF_CTRL, COMPBUF_SIZE_CURRENT, compbuf_size_segments, 1, 100);
 		hubbub2->compbuf_size_segments = compbuf_size_segments;
+		ASSERT(REG_GET(DCHUBBUB_COMPBUF_CTRL, CONFIG_ERROR, &compbuf_size_segments) && !compbuf_size_segments);
 	}
 }
 
diff --git a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hubbub.h b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hubbub.h
index 298858d8259b..e3a654bf04e8 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hubbub.h
+++ b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hubbub.h
@@ -98,6 +98,7 @@
 	HUBBUB_SF(DCHUBBUB_DET3_CTRL, DET3_SIZE_CURRENT, mask_sh),\
 	HUBBUB_SF(DCHUBBUB_COMPBUF_CTRL, COMPBUF_SIZE, mask_sh),\
 	HUBBUB_SF(DCHUBBUB_COMPBUF_CTRL, COMPBUF_SIZE_CURRENT, mask_sh),\
+	HUBBUB_SF(DCHUBBUB_COMPBUF_CTRL, CONFIG_ERROR, mask_sh),\
 	HUBBUB_SF(COMPBUF_RESERVED_SPACE, COMPBUF_RESERVED_SPACE_64B, mask_sh),\
 	HUBBUB_SF(COMPBUF_RESERVED_SPACE, COMPBUF_RESERVED_SPACE_ZS, mask_sh),\
 	HUBBUB_SF(DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_Z8_A, DCHUBBUB_ARB_ALLOW_SR_ENTER_WATERMARK_Z8_A, mask_sh), \
-- 
2.25.1