drm/i915/skl: Program the DDB allocation

v2: Adapt to the planes/cursor split
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/i915_reg.h

@@ -4696,6 +4696,8 @@ enum punit_power_well {
 #define _PLANE_KEYMSK_2_A			0x70298
 #define _PLANE_KEYMAX_1_A			0x701a0
 #define _PLANE_KEYMAX_2_A			0x702a0
+#define _PLANE_BUF_CFG_1_A			0x7027c
+#define _PLANE_BUF_CFG_2_A			0x7037c
 
 #define _PLANE_CTL_1_B				0x71180
 #define _PLANE_CTL_2_B				0x71280
@@ -4773,6 +4775,20 @@ enum punit_power_well {
 #define PLANE_KEYMAX(pipe, plane)	\
 	_PLANE(plane, _PLANE_KEYMAX_1(pipe), _PLANE_KEYMAX_2(pipe))
 
+#define _PLANE_BUF_CFG_1_B			0x7127c
+#define _PLANE_BUF_CFG_2_B			0x7137c
+#define _PLANE_BUF_CFG_1(pipe)	\
+	_PIPE(pipe, _PLANE_BUF_CFG_1_A, _PLANE_BUF_CFG_1_B)
+#define _PLANE_BUF_CFG_2(pipe)	\
+	_PIPE(pipe, _PLANE_BUF_CFG_2_A, _PLANE_BUF_CFG_2_B)
+#define PLANE_BUF_CFG(pipe, plane)	\
+	_PLANE(plane, _PLANE_BUF_CFG_1(pipe), _PLANE_BUF_CFG_2(pipe))
+
+/* SKL new cursor registers */
+#define _CUR_BUF_CFG_A				0x7017c
+#define _CUR_BUF_CFG_B				0x7117c
+#define CUR_BUF_CFG(pipe)	_PIPE(pipe, _CUR_BUF_CFG_A, _CUR_BUF_CFG_B)
+
 /* VBIOS regs */
 #define VGACNTRL		0x71400
 # define VGA_DISP_DISABLE			(1 << 31)

drivers/gpu/drm/i915/intel_pm.c

@@ -3426,6 +3426,15 @@ static void skl_write_wm_values(struct drm_i915_private *dev_priv,
 				I915_WRITE(PLANE_WM_TRANS(pipe, i),
 						new->plane_trans[pipe][i]);
 			I915_WRITE(CUR_WM_TRANS(pipe), new->cursor_trans[pipe]);
+
+			for (i = 0; i < intel_num_planes(crtc); i++)
+				I915_WRITE(PLANE_BUF_CFG(pipe, i),
+					   new->ddb.plane[pipe][i].end << 16 |
+					   new->ddb.plane[pipe][i].start);
+
+			I915_WRITE(CUR_BUF_CFG(pipe),
+				   new->ddb.cursor[pipe].end << 16 |
+				   new->ddb.cursor[pipe].start);
 		}
 	}