[PATCH 03/11] drm/amd/display: Add HDR3DLUT and SHAPER memory shutdown support

[Aurabindo Pillai]

From: Jacky Liao <ziyu.liao at amd.com>

[Why]
The HDR3DLUT and SHAPER memory blocks should be powered down when
they're not in use. This will reduce power consumption.

[How]
1. Write to HDR3DLUT_MEM_PWR_FORCE to put memory to shutdown
   when HDR3DLUT is not used.
2. Write to SHAPER_MEM_PWR_FORCE to put memory to shutdown
   when SHAPER is not used.

Signed-off-by: Jacky Liao <ziyu.liao at amd.com>
Reviewed-by: Eric Yang <eric.yang2 at amd.com>
Acked-by: Yongqiang Sun <yongqiang.sun at amd.com>
Acked-by: Aurabindo Pillai <aurabindo.pillai at amd.com>
---
 .../gpu/drm/amd/display/dc/dcn30/dcn30_dpp.c  | 38 +++++++++++++++++++
 .../gpu/drm/amd/display/dc/dcn30/dcn30_dpp.h  | 14 ++++++-
 2 files changed, 51 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_dpp.c b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_dpp.c
index 052bab3e5e8e..6e864b1a95c4 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_dpp.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_dpp.c
@@ -510,6 +510,32 @@ static void dpp3_power_on_blnd_lut(
 	}
 }
 
+static void dpp3_power_on_hdr3dlut(
+	struct dpp *dpp_base,
+	bool power_on)
+{
+	struct dcn3_dpp *dpp = TO_DCN30_DPP(dpp_base);
+
+	if (dpp_base->ctx->dc->debug.enable_mem_low_power.bits.cm) {
+		REG_UPDATE(CM_MEM_PWR_CTRL2, HDR3DLUT_MEM_PWR_FORCE, power_on ? 0 : 3);
+		if (power_on)
+			REG_WAIT(CM_MEM_PWR_STATUS2, HDR3DLUT_MEM_PWR_STATE, 0, 1, 5);
+	}
+}
+
+static void dpp3_power_on_shaper(
+	struct dpp *dpp_base,
+	bool power_on)
+{
+	struct dcn3_dpp *dpp = TO_DCN30_DPP(dpp_base);
+
+	if (dpp_base->ctx->dc->debug.enable_mem_low_power.bits.cm) {
+		REG_UPDATE(CM_MEM_PWR_CTRL2, SHAPER_MEM_PWR_FORCE, power_on ? 0 : 3);
+		if (power_on)
+			REG_WAIT(CM_MEM_PWR_STATUS2, SHAPER_MEM_PWR_STATE, 0, 1, 5);
+	}
+}
+
 static void dpp3_configure_blnd_lut(
 		struct dpp *dpp_base,
 		bool is_ram_a)
@@ -1095,8 +1121,14 @@ bool dpp3_program_shaper(
 
 	if (params == NULL) {
 		REG_SET(CM_SHAPER_CONTROL, 0, CM_SHAPER_LUT_MODE, 0);
+		if (dpp_base->ctx->dc->debug.enable_mem_low_power.bits.cm)
+			dpp3_power_on_shaper(dpp_base, false);
 		return false;
 	}
+
+	if (dpp_base->ctx->dc->debug.enable_mem_low_power.bits.cm)
+		dpp3_power_on_shaper(dpp_base, true);
+
 	current_mode = dpp3_get_shaper_current(dpp_base);
 
 	if (current_mode == LUT_BYPASS || current_mode == LUT_RAM_A)
@@ -1285,8 +1317,14 @@ bool dpp3_program_3dlut(
 
 	if (params == NULL) {
 		dpp3_set_3dlut_mode(dpp_base, LUT_BYPASS, false, false);
+		if (dpp_base->ctx->dc->debug.enable_mem_low_power.bits.cm)
+			dpp3_power_on_hdr3dlut(dpp_base, false);
 		return false;
 	}
+
+	if (dpp_base->ctx->dc->debug.enable_mem_low_power.bits.cm)
+		dpp3_power_on_hdr3dlut(dpp_base, true);
+
 	mode = get3dlut_config(dpp_base, &is_17x17x17, &is_12bits_color_channel);
 
 	if (mode == LUT_BYPASS || mode == LUT_RAM_B)
diff --git a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_dpp.h b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_dpp.h
index 2ae5e1f93dd4..6415aaa01d24 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_dpp.h
+++ b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_dpp.h
@@ -161,6 +161,8 @@
 	TF_REG_LIST_DCN20_COMMON(id), \
 	SRI(CM_BLNDGAM_CONTROL, CM, id), \
 	SRI(CM_SHAPER_LUT_DATA, CM, id),\
+	SRI(CM_MEM_PWR_CTRL2, CM, id), \
+	SRI(CM_MEM_PWR_STATUS2, CM, id), \
 	SRI(CM_BLNDGAM_RAMA_START_SLOPE_CNTL_B, CM, id),\
 	SRI(CM_BLNDGAM_RAMA_START_SLOPE_CNTL_G, CM, id),\
 	SRI(CM_BLNDGAM_RAMA_START_SLOPE_CNTL_R, CM, id),\
@@ -344,6 +346,10 @@
 
 #define DPP_REG_LIST_SH_MASK_DCN30_UPDATED(mask_sh)\
 	TF_SF(CM0_CM_MEM_PWR_STATUS, BLNDGAM_MEM_PWR_STATE, mask_sh), \
+	TF_SF(CM0_CM_MEM_PWR_CTRL2, HDR3DLUT_MEM_PWR_FORCE, mask_sh),\
+	TF_SF(CM0_CM_MEM_PWR_CTRL2, SHAPER_MEM_PWR_FORCE, mask_sh),\
+	TF_SF(CM0_CM_MEM_PWR_STATUS2, HDR3DLUT_MEM_PWR_STATE, mask_sh),\
+	TF_SF(CM0_CM_MEM_PWR_STATUS2, SHAPER_MEM_PWR_STATE, mask_sh),\
 	TF_SF(CM0_CM_BLNDGAM_CONTROL, CM_BLNDGAM_MODE, mask_sh), \
 	TF_SF(CM0_CM_BLNDGAM_CONTROL, CM_BLNDGAM_MODE_CURRENT, mask_sh), \
 	TF_SF(CM0_CM_BLNDGAM_CONTROL, CM_BLNDGAM_SELECT_CURRENT, mask_sh), \
@@ -387,6 +393,8 @@
 	type CM_BIAS_CR_R;\
 	type GAMCOR_MEM_PWR_DIS; \
 	type GAMCOR_MEM_PWR_FORCE; \
+	type HDR3DLUT_MEM_PWR_FORCE; \
+	type SHAPER_MEM_PWR_FORCE; \
 	type PRE_DEGAM_MODE;\
 	type PRE_DEGAM_SELECT;\
 	type CNVC_ALPHA_PLANE_ENABLE; \
@@ -448,7 +456,9 @@
 	type CM_BLNDGAM_SELECT_CURRENT; \
 	type CM_BLNDGAM_SELECT; \
 	type GAMCOR_MEM_PWR_STATE; \
-	type BLNDGAM_MEM_PWR_STATE
+	type BLNDGAM_MEM_PWR_STATE; \
+	type HDR3DLUT_MEM_PWR_STATE; \
+	type SHAPER_MEM_PWR_STATE
 
 struct dcn3_dpp_shift {
 	DPP_REG_FIELD_LIST_DCN3(uint8_t);
@@ -461,6 +471,8 @@ struct dcn3_dpp_mask {
 #define DPP_DCN3_REG_VARIABLE_LIST_COMMON \
 	DPP_DCN2_REG_VARIABLE_LIST; \
 	uint32_t CM_MEM_PWR_STATUS;\
+	uint32_t CM_MEM_PWR_STATUS2;\
+	uint32_t CM_MEM_PWR_CTRL2;\
 	uint32_t CM_DEALPHA;\
 	uint32_t CM_BIAS_CR_R;\
 	uint32_t CM_BIAS_Y_G_CB_B;\
-- 
2.25.1