[PATCH 12/29] drm/amd/display: Temporary workaround to toggle watermark setting

[Bhawanpreet Lakha]

From: Lewis Huang <Lewis.Huang at amd.com>

[Why]
Watermarks not propagated to DCHUBP after it is powered on

[How]
Add temoprary function apply_DEDCN21_147_wa to apply wm settings for Renoir

Signed-off-by: Lewis Huang <Lewis.Huang at amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng at amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha at amd.com>
---
 drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c    | 4 ++++
 drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hubbub.c   | 9 +++++++++
 drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c | 1 +
 drivers/gpu/drm/amd/display/dc/inc/hw/dchubbub.h      | 1 +
 4 files changed, 15 insertions(+)

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 ce2530509e12..6229a8ca0013 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
@@ -1533,6 +1533,10 @@ static void dcn20_program_front_end_for_ctx(
 				msleep(1);
 		}
 	}
+
+	/* WA to apply WM setting*/
+	if (dc->hwseq->wa.DEGVIDCN21)
+		dc->res_pool->hubbub->funcs->apply_DEDCN21_147_wa(dc->res_pool->hubbub);
 }
 
 
diff --git a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hubbub.c b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hubbub.c
index fdfbdeb32459..2232ccf14bdd 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hubbub.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_hubbub.c
@@ -616,6 +616,14 @@ void hubbub21_wm_read_state(struct hubbub *hubbub,
 			DCHUBBUB_ARB_ALLOW_DRAM_CLK_CHANGE_WATERMARK_D, &s->dram_clk_chanage);
 }
 
+void hubbub21_apply_DEDCN21_147_wa(struct hubbub *hubbub)
+{
+	struct dcn20_hubbub *hubbub1 = TO_DCN20_HUBBUB(hubbub);
+	uint32_t prog_wm_value;
+
+	prog_wm_value = REG_READ(DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_A);
+	REG_WRITE(DCHUBBUB_ARB_DATA_URGENCY_WATERMARK_A, prog_wm_value);
+}
 
 static const struct hubbub_funcs hubbub21_funcs = {
 	.update_dchub = hubbub2_update_dchub,
@@ -627,6 +635,7 @@ static const struct hubbub_funcs hubbub21_funcs = {
 	.wm_read_state = hubbub21_wm_read_state,
 	.get_dchub_ref_freq = hubbub2_get_dchub_ref_freq,
 	.program_watermarks = hubbub21_program_watermarks,
+	.apply_DEDCN21_147_wa = hubbub21_apply_DEDCN21_147_wa,
 };
 
 void hubbub21_construct(struct dcn20_hubbub *hubbub,
diff --git a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c
index e39961d0f24e..5e15f800a9f1 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn21/dcn21_resource.c
@@ -1468,6 +1468,7 @@ static struct dce_hwseq *dcn21_hwseq_create(
 		hws->regs = &hwseq_reg;
 		hws->shifts = &hwseq_shift;
 		hws->masks = &hwseq_mask;
+		hws->wa.DEGVIDCN21 = true;
 	}
 	return hws;
 }
diff --git a/drivers/gpu/drm/amd/display/dc/inc/hw/dchubbub.h b/drivers/gpu/drm/amd/display/dc/inc/hw/dchubbub.h
index a6297219d7fc..c81a17aeaa25 100644
--- a/drivers/gpu/drm/amd/display/dc/inc/hw/dchubbub.h
+++ b/drivers/gpu/drm/amd/display/dc/inc/hw/dchubbub.h
@@ -147,6 +147,7 @@ struct hubbub_funcs {
 	bool (*is_allow_self_refresh_enabled)(struct hubbub *hubbub);
 	void (*allow_self_refresh_control)(struct hubbub *hubbub, bool allow);
 
+	void (*apply_DEDCN21_147_wa)(struct hubbub *hubbub);
 };
 
 struct hubbub {
-- 
2.17.1