[media] exynos-gsc: Adding tiled multi-planar format to G-Scaler

Adding V4L2_PIX_FMT_NV12MT_16X16 to G-Scaler supported formats.
If the output or input format is V4L2_PIX_FMT_NV12MT_16X16, configure
G-Scaler to use GSC_IN_TILE_MODE.

[s.nawrocki: shortened the pixel format description]
Signed-off-by: Shaik Ameer Basha <shaik.ameer@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/platform/exynos-gsc/gsc-core.c

@@ -185,6 +185,15 @@ static const struct gsc_fmt gsc_formats[] = {
 		.corder		= GSC_CRCB,
 		.num_planes	= 3,
 		.num_comp	= 3,
+	}, {
+		.name		= "YUV 4:2:0 n.c. 2p, Y/CbCr tiled",
+		.pixelformat	= V4L2_PIX_FMT_NV12MT_16X16,
+		.depth		= { 8, 4 },
+		.color		= GSC_YUV420,
+		.yorder		= GSC_LSB_Y,
+		.corder		= GSC_CBCR,
+		.num_planes	= 2,
+		.num_comp	= 2,
 	}
 };
 

drivers/media/platform/exynos-gsc/gsc-core.h

@@ -427,6 +427,11 @@ static inline void gsc_ctx_state_lock_clear(u32 state, struct gsc_ctx *ctx)
 	spin_unlock_irqrestore(&ctx->gsc_dev->slock, flags);
 }
 
+static inline int is_tiled(const struct gsc_fmt *fmt)
+{
+	return fmt->pixelformat == V4L2_PIX_FMT_NV12MT_16X16;
+}
+
 static inline void gsc_hw_enable_control(struct gsc_dev *dev, bool on)
 {
 	u32 cfg = readl(dev->regs + GSC_ENABLE);

drivers/media/platform/exynos-gsc/gsc-regs.c

@@ -214,6 +214,9 @@ void gsc_hw_set_in_image_format(struct gsc_ctx *ctx)
 		break;
 	}
 
+	if (is_tiled(frame->fmt))
+		cfg |= GSC_IN_TILE_C_16x8 | GSC_IN_TILE_MODE;
+
 	writel(cfg, dev->regs + GSC_IN_CON);
 }
 
@@ -334,6 +337,9 @@ void gsc_hw_set_out_image_format(struct gsc_ctx *ctx)
 		break;
 	}
 
+	if (is_tiled(frame->fmt))
+		cfg |= GSC_OUT_TILE_C_16x8 | GSC_OUT_TILE_MODE;
+
 end_set:
 	writel(cfg, dev->regs + GSC_OUT_CON);
 }