drm/amdgpu/powerper: add vega20 BACO functions

Signed-off-by: Jim Qu <Jim.Qu@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 81 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_baco.c b/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_baco.c
new file mode 100644
index 000000000000..0d883b358df2
--- /dev/null
+++ b/drivers/gpu/drm/amd/powerplay/hwmgr/vega20_baco.c
@@ -0,0 +1,81 @@
+#include "amdgpu.h"
+#include "soc15.h"
+#include "soc15_hw_ip.h"
+#include "soc15_common.h"
+#include "vega20_inc.h"
+#include "vega20_ppsmc.h"
+#include "vega20_baco.h"
+
+
+
+static const struct soc15_baco_cmd_entry clean_baco_tbl[] =
+{
+	{CMD_WRITE, SOC15_REG_ENTRY(NBIF, 0, mmBIOS_SCRATCH_6), 0, 0, 0, 0},
+	{CMD_WRITE, SOC15_REG_ENTRY(NBIF, 0, mmBIOS_SCRATCH_7), 0, 0, 0, 0},
+};
+
+int vega20_baco_get_capability(struct pp_hwmgr *hwmgr, bool *cap)
+{
+	struct amdgpu_device *adev = (struct amdgpu_device *)(hwmgr->adev);
+	uint32_t reg;
+
+	*cap = false;
+	if (!phm_cap_enabled(hwmgr->platform_descriptor.platformCaps, PHM_PlatformCaps_BACO))
+		return 0;
+
+	if (((RREG32(0x17569) & 0x20000000) >> 29) == 0x1) {
+		reg = RREG32_SOC15(NBIF, 0, mmRCC_BIF_STRAP0);
+
+		if (reg & RCC_BIF_STRAP0__STRAP_PX_CAPABLE_MASK)
+			*cap = true;
+	}
+
+	return 0;
+}
+
+int vega20_baco_get_state(struct pp_hwmgr *hwmgr, enum BACO_STATE *state)
+{
+	struct amdgpu_device *adev = (struct amdgpu_device *)(hwmgr->adev);
+	uint32_t reg;
+
+	reg = RREG32_SOC15(NBIF, 0, mmBACO_CNTL);
+
+	if (reg & BACO_CNTL__BACO_MODE_MASK)
+		/* gfx has already entered BACO state */
+		*state = BACO_STATE_IN;
+	else
+		*state = BACO_STATE_OUT;
+	return 0;
+}
+
+int vega20_baco_set_state(struct pp_hwmgr *hwmgr, enum BACO_STATE state)
+{
+	struct amdgpu_device *adev = (struct amdgpu_device *)(hwmgr->adev);
+	enum BACO_STATE cur_state;
+	uint32_t data;
+
+	vega20_baco_get_state(hwmgr, &cur_state);
+
+	if (cur_state == state)
+		/* aisc already in the target state */
+		return 0;
+
+	if (state == BACO_STATE_IN) {
+		data = RREG32_SOC15(THM, 0, mmTHM_BACO_CNTL);
+		data |= 0x80000000;
+		WREG32_SOC15(THM, 0, mmTHM_BACO_CNTL, data);
+
+
+		if(smum_send_msg_to_smc_with_parameter(hwmgr, PPSMC_MSG_EnterBaco, 0))
+			return -1;
+
+	} else if (state == BACO_STATE_OUT) {
+		if (smum_send_msg_to_smc(hwmgr, PPSMC_MSG_ExitBaco))
+			return -1;
+		if (!soc15_baco_program_registers(hwmgr, clean_baco_tbl,
+						     ARRAY_SIZE(clean_baco_tbl)))
+			return -1;
+	}
+
+	return 0;
+}