drm/radeon: add set_uvd_clocks callback for ON/LN/TN (v4)

v2: write clk registers only once!
v3: update cg scratch register properly
v4: add TN support

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/radeon/evergreen.c

@@ -84,6 +84,53 @@ void evergreen_tiling_fields(unsigned tiling_flags, unsigned *bankw,
 	}
 }
 
+static int sumo_set_uvd_clock(struct radeon_device *rdev, u32 clock,
+			      u32 cntl_reg, u32 status_reg)
+{
+	int r, i;
+	struct atom_clock_dividers dividers;
+
+        r = radeon_atom_get_clock_dividers(rdev, COMPUTE_ENGINE_PLL_PARAM,
+					   clock, false, &dividers);
+	if (r)
+		return r;
+
+	WREG32_P(cntl_reg, dividers.post_div, ~(DCLK_DIR_CNTL_EN|DCLK_DIVIDER_MASK));
+
+	for (i = 0; i < 100; i++) {
+		if (RREG32(status_reg) & DCLK_STATUS)
+			break;
+		mdelay(10);
+	}
+	if (i == 100)
+		return -ETIMEDOUT;
+
+	return 0;
+}
+
+int sumo_set_uvd_clocks(struct radeon_device *rdev, u32 vclk, u32 dclk)
+{
+	int r = 0;
+	u32 cg_scratch = RREG32(CG_SCRATCH1);
+
+	r = sumo_set_uvd_clock(rdev, vclk, CG_VCLK_CNTL, CG_VCLK_STATUS);
+	if (r)
+		goto done;
+	cg_scratch &= 0xffff0000;
+	cg_scratch |= vclk / 100; /* Mhz */
+
+	r = sumo_set_uvd_clock(rdev, dclk, CG_DCLK_CNTL, CG_DCLK_STATUS);
+	if (r)
+		goto done;
+	cg_scratch &= 0x0000ffff;
+	cg_scratch |= (dclk / 100) << 16; /* Mhz */
+
+done:
+	WREG32(CG_SCRATCH1, cg_scratch);
+
+	return r;
+}
+
 void evergreen_fix_pci_max_read_req_size(struct radeon_device *rdev)
 {
 	u16 ctl, v;

drivers/gpu/drm/radeon/evergreend.h

@@ -53,6 +53,16 @@
 #define RCU_IND_INDEX           			0x100
 #define RCU_IND_DATA            			0x104
 
+/* fusion uvd clocks */
+#define CG_DCLK_CNTL                                    0x610
+#       define DCLK_DIVIDER_MASK                        0x7f
+#       define DCLK_DIR_CNTL_EN                         (1 << 8)
+#define CG_DCLK_STATUS                                  0x614
+#       define DCLK_STATUS                              (1 << 0)
+#define CG_VCLK_CNTL                                    0x618
+#define CG_VCLK_STATUS                                  0x61c
+#define	CG_SCRATCH1					0x820
+
 #define GRBM_GFX_INDEX          			0x802C
 #define		INSTANCE_INDEX(x)			((x) << 0)
 #define		SE_INDEX(x)     			((x) << 16)

drivers/gpu/drm/radeon/radeon_asic.c

@@ -1373,6 +1373,7 @@ static struct radeon_asic sumo_asic = {
 		.get_pcie_lanes = NULL,
 		.set_pcie_lanes = NULL,
 		.set_clock_gating = NULL,
+		.set_uvd_clocks = &sumo_set_uvd_clocks,
 	},
 	.pflip = {
 		.pre_page_flip = &evergreen_pre_page_flip,
@@ -1744,6 +1745,7 @@ static struct radeon_asic trinity_asic = {
 		.get_pcie_lanes = NULL,
 		.set_pcie_lanes = NULL,
 		.set_clock_gating = NULL,
+		.set_uvd_clocks = &sumo_set_uvd_clocks,
 	},
 	.pflip = {
 		.pre_page_flip = &evergreen_pre_page_flip,

drivers/gpu/drm/radeon/radeon_asic.h

@@ -459,6 +459,7 @@ extern void evergreen_pm_prepare(struct radeon_device *rdev);
 extern void evergreen_pm_finish(struct radeon_device *rdev);
 extern void sumo_pm_init_profile(struct radeon_device *rdev);
 extern void btc_pm_init_profile(struct radeon_device *rdev);
+int sumo_set_uvd_clocks(struct radeon_device *rdev, u32 vclk, u32 dclk);
 extern void evergreen_pre_page_flip(struct radeon_device *rdev, int crtc);
 extern u32 evergreen_page_flip(struct radeon_device *rdev, int crtc, u64 crtc_base);
 extern void evergreen_post_page_flip(struct radeon_device *rdev, int crtc);