OMAPDSS: DISPC: Add writeback register offsets and dss features structs

Since writeback has many overlay like properties, and most of it's registers are
similar to that of overlays, it's possible to reuse most of the overlay related
DISPC code for writeback when considering it as a plane. Writeback was added as
a plane in the omap_plane field as OMAP_DSS_WB.

Add the writeback register offsets in dispc.h, add minimal WB plane related info
needed in dss_features. Add a function which returns the number of writeback
pipelines an OMAP version has.

Signed-off-by: Archit Taneja <archit@ti.com>
diff --git a/drivers/video/omap2/dss/dispc.h b/drivers/video/omap2/dss/dispc.h
index 42e56cc..222363c6 100644
--- a/drivers/video/omap2/dss/dispc.h
+++ b/drivers/video/omap2/dss/dispc.h
@@ -373,6 +373,7 @@
 	case OMAP_DSS_VIDEO2:
 		return 0x0000;
 	case OMAP_DSS_VIDEO3:
+	case OMAP_DSS_WB:
 		return 0x0008;
 	default:
 		BUG();
@@ -388,6 +389,7 @@
 	case OMAP_DSS_VIDEO2:
 		return 0x0004;
 	case OMAP_DSS_VIDEO3:
+	case OMAP_DSS_WB:
 		return 0x000C;
 	default:
 		BUG();
@@ -407,6 +409,8 @@
 		return 0x04BC;
 	case OMAP_DSS_VIDEO3:
 		return 0x0310;
+	case OMAP_DSS_WB:
+		return 0x0118;
 	default:
 		BUG();
 		return 0;
@@ -425,6 +429,8 @@
 		return 0x04C0;
 	case OMAP_DSS_VIDEO3:
 		return 0x0314;
+	case OMAP_DSS_WB:
+		return 0x011C;
 	default:
 		BUG();
 		return 0;
@@ -454,6 +460,7 @@
 	case OMAP_DSS_VIDEO2:
 		return 0x000C;
 	case OMAP_DSS_VIDEO3:
+	case OMAP_DSS_WB:
 		return 0x00A8;
 	default:
 		BUG();
@@ -470,6 +477,7 @@
 	case OMAP_DSS_VIDEO2:
 		return 0x0010;
 	case OMAP_DSS_VIDEO3:
+	case OMAP_DSS_WB:
 		return 0x0070;
 	default:
 		BUG();
@@ -489,6 +497,8 @@
 		return 0x04DC;
 	case OMAP_DSS_VIDEO3:
 		return 0x032C;
+	case OMAP_DSS_WB:
+		return 0x0310;
 	default:
 		BUG();
 		return 0;
@@ -504,6 +514,7 @@
 	case OMAP_DSS_VIDEO2:
 		return 0x0014;
 	case OMAP_DSS_VIDEO3:
+	case OMAP_DSS_WB:
 		return 0x008C;
 	default:
 		BUG();
@@ -537,6 +548,7 @@
 	case OMAP_DSS_VIDEO2:
 		return 0x001C;
 	case OMAP_DSS_VIDEO3:
+	case OMAP_DSS_WB:
 		return 0x00A4;
 	default:
 		BUG();
@@ -553,6 +565,7 @@
 	case OMAP_DSS_VIDEO2:
 		return 0x0020;
 	case OMAP_DSS_VIDEO3:
+	case OMAP_DSS_WB:
 		return 0x0098;
 	default:
 		BUG();
@@ -602,6 +615,7 @@
 	case OMAP_DSS_VIDEO2:
 		return 0x0024;
 	case OMAP_DSS_VIDEO3:
+	case OMAP_DSS_WB:
 		return 0x0090;
 	default:
 		BUG();
@@ -621,6 +635,8 @@
 		return 0x055C;
 	case OMAP_DSS_VIDEO3:
 		return 0x0424;
+	case OMAP_DSS_WB:
+		return 0x290;
 	default:
 		BUG();
 		return 0;
@@ -637,6 +653,7 @@
 	case OMAP_DSS_VIDEO2:
 		return 0x0028;
 	case OMAP_DSS_VIDEO3:
+	case OMAP_DSS_WB:
 		return 0x0094;
 	default:
 		BUG();
@@ -655,6 +672,7 @@
 	case OMAP_DSS_VIDEO2:
 		return 0x002C;
 	case OMAP_DSS_VIDEO3:
+	case OMAP_DSS_WB:
 		return 0x0000;
 	default:
 		BUG();
@@ -674,6 +692,8 @@
 		return 0x0560;
 	case OMAP_DSS_VIDEO3:
 		return 0x0428;
+	case OMAP_DSS_WB:
+		return 0x0294;
 	default:
 		BUG();
 		return 0;
@@ -690,6 +710,7 @@
 	case OMAP_DSS_VIDEO2:
 		return 0x0030;
 	case OMAP_DSS_VIDEO3:
+	case OMAP_DSS_WB:
 		return 0x0004;
 	default:
 		BUG();
@@ -709,6 +730,8 @@
 		return 0x0564;
 	case OMAP_DSS_VIDEO3:
 		return 0x042C;
+	case OMAP_DSS_WB:
+		return 0x0298;
 	default:
 		BUG();
 		return 0;
@@ -726,6 +749,7 @@
 	case OMAP_DSS_VIDEO2:
 		return 0x0034 + i * 0x8;
 	case OMAP_DSS_VIDEO3:
+	case OMAP_DSS_WB:
 		return 0x0010 + i * 0x8;
 	default:
 		BUG();
@@ -746,6 +770,8 @@
 		return 0x0568 + i * 0x8;
 	case OMAP_DSS_VIDEO3:
 		return 0x0430 + i * 0x8;
+	case OMAP_DSS_WB:
+		return 0x02A0 + i * 0x8;
 	default:
 		BUG();
 		return 0;
@@ -763,6 +789,7 @@
 	case OMAP_DSS_VIDEO2:
 		return 0x0038 + i * 0x8;
 	case OMAP_DSS_VIDEO3:
+	case OMAP_DSS_WB:
 		return 0x0014 + i * 0x8;
 	default:
 		BUG();
@@ -783,6 +810,8 @@
 		return 0x056C + i * 0x8;
 	case OMAP_DSS_VIDEO3:
 		return 0x0434 + i * 0x8;
+	case OMAP_DSS_WB:
+		return 0x02A4 + i * 0x8;
 	default:
 		BUG();
 		return 0;
@@ -799,6 +828,7 @@
 	case OMAP_DSS_VIDEO1:
 	case OMAP_DSS_VIDEO2:
 	case OMAP_DSS_VIDEO3:
+	case OMAP_DSS_WB:
 		return 0x0074 + i * 0x4;
 	default:
 		BUG();
@@ -818,6 +848,7 @@
 	case OMAP_DSS_VIDEO2:
 		return 0x00B4 + i * 0x4;
 	case OMAP_DSS_VIDEO3:
+	case OMAP_DSS_WB:
 		return 0x0050 + i * 0x4;
 	default:
 		BUG();
@@ -838,6 +869,8 @@
 		return 0x05A8 + i * 0x4;
 	case OMAP_DSS_VIDEO3:
 		return 0x0470 + i * 0x4;
+	case OMAP_DSS_WB:
+		return 0x02E0 + i * 0x4;
 	default:
 		BUG();
 		return 0;
diff --git a/drivers/video/omap2/dss/dss_features.c b/drivers/video/omap2/dss/dss_features.c
index 5a5c25b..acbc1e1 100644
--- a/drivers/video/omap2/dss/dss_features.c
+++ b/drivers/video/omap2/dss/dss_features.c
@@ -46,6 +46,7 @@
 
 	const int num_mgrs;
 	const int num_ovls;
+	const int num_wbs;
 	const enum omap_display_type *supported_displays;
 	const enum omap_dss_output_id *supported_outputs;
 	const enum omap_color_mode *supported_color_modes;
@@ -310,6 +311,16 @@
 	OMAP_DSS_COLOR_ARGB16 | OMAP_DSS_COLOR_XRGB16_1555 |
 	OMAP_DSS_COLOR_ARGB32 | OMAP_DSS_COLOR_RGBX16 |
 	OMAP_DSS_COLOR_RGBX32,
+
+	/* OMAP_DSS_WB */
+	OMAP_DSS_COLOR_RGB16 | OMAP_DSS_COLOR_RGB12U |
+	OMAP_DSS_COLOR_YUV2 | OMAP_DSS_COLOR_ARGB16_1555 |
+	OMAP_DSS_COLOR_RGBA32 | OMAP_DSS_COLOR_NV12 |
+	OMAP_DSS_COLOR_RGBA16 | OMAP_DSS_COLOR_RGB24U |
+	OMAP_DSS_COLOR_RGB24P | OMAP_DSS_COLOR_UYVY |
+	OMAP_DSS_COLOR_ARGB16 | OMAP_DSS_COLOR_XRGB16_1555 |
+	OMAP_DSS_COLOR_ARGB32 | OMAP_DSS_COLOR_RGBX16 |
+	OMAP_DSS_COLOR_RGBX32,
 };
 
 static const enum omap_overlay_caps omap2_dss_overlay_caps[] = {
@@ -710,6 +721,7 @@
 
 	.num_mgrs = 3,
 	.num_ovls = 4,
+	.num_wbs = 1,
 	.supported_displays = omap4_dss_supported_displays,
 	.supported_outputs = omap4_dss_supported_outputs,
 	.supported_color_modes = omap4_dss_supported_color_modes,
@@ -731,6 +743,7 @@
 
 	.num_mgrs = 3,
 	.num_ovls = 4,
+	.num_wbs = 1,
 	.supported_displays = omap4_dss_supported_displays,
 	.supported_outputs = omap4_dss_supported_outputs,
 	.supported_color_modes = omap4_dss_supported_color_modes,
@@ -752,6 +765,7 @@
 
 	.num_mgrs = 3,
 	.num_ovls = 4,
+	.num_wbs = 1,
 	.supported_displays = omap4_dss_supported_displays,
 	.supported_outputs = omap4_dss_supported_outputs,
 	.supported_color_modes = omap4_dss_supported_color_modes,
@@ -829,6 +843,11 @@
 	return omap_current_dss_features->num_ovls;
 }
 
+int dss_feat_get_num_wbs(void)
+{
+	return omap_current_dss_features->num_wbs;
+}
+
 unsigned long dss_feat_get_param_min(enum dss_range_param param)
 {
 	return omap_current_dss_features->dss_params[param].min;
diff --git a/drivers/video/omap2/dss/dss_features.h b/drivers/video/omap2/dss/dss_features.h
index 89df2aa..9218113 100644
--- a/drivers/video/omap2/dss/dss_features.h
+++ b/drivers/video/omap2/dss/dss_features.h
@@ -105,6 +105,7 @@
 /* DSS Feature Functions */
 int dss_feat_get_num_mgrs(void);
 int dss_feat_get_num_ovls(void);
+int dss_feat_get_num_wbs(void);
 unsigned long dss_feat_get_param_min(enum dss_range_param param);
 unsigned long dss_feat_get_param_max(enum dss_range_param param);
 enum omap_display_type dss_feat_get_supported_displays(enum omap_channel channel);