[media] s5p-jpeg: add 5420 family support

JPEG IP found in Exynos5420 is similar to what is in Exynos3250, but
there are some subtle differences which this patch takes into account.

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

Documentation/devicetree/bindings/media/exynos-jpeg-codec.txt

@@ -4,7 +4,7 @@ Required properties:
 
 - compatible	: should be one of:
 		  "samsung,s5pv210-jpeg", "samsung,exynos4210-jpeg",
-		  "samsung,exynos3250-jpeg";
+		  "samsung,exynos3250-jpeg", "samsung,exynos5420-jpeg";
 - reg		: address and length of the JPEG codec IP register set;
 - interrupts	: specifies the JPEG codec IP interrupt;
 - clock-names   : should contain:

drivers/media/platform/s5p-jpeg/jpeg-core.c

@@ -621,6 +621,7 @@ static int s5p_jpeg_to_user_subsampling(struct s5p_jpeg_ctx *ctx)
 			return V4L2_JPEG_CHROMA_SUBSAMPLING_GRAY;
 		return ctx->subsampling;
 	case SJPEG_EXYNOS3250:
+	case SJPEG_EXYNOS5420:
 		if (ctx->subsampling > 3)
 			return V4L2_JPEG_CHROMA_SUBSAMPLING_411;
 		return exynos3250_decoded_subsampling[ctx->subsampling];
@@ -1142,13 +1143,13 @@ static void jpeg_bound_align_image(struct s5p_jpeg_ctx *ctx,
 	w_step = 1 << walign;
 	h_step = 1 << halign;
 
-	if (ctx->jpeg->variant->version == SJPEG_EXYNOS3250) {
+	if (ctx->jpeg->variant->hw3250_compat) {
 		/*
 		 * Rightmost and bottommost pixels are cropped by the
-		 * Exynos3250 JPEG IP for RGB formats, for the specific
-		 * width and height values respectively. This assignment
-		 * will result in v4l_bound_align_image returning dimensions
-		 * reduced by 1 for the aforementioned cases.
+		 * Exynos3250/compatible JPEG IP for RGB formats, for the
+		 * specific width and height values respectively. This
+		 * assignment will result in v4l_bound_align_image returning
+		 * dimensions reduced by 1 for the aforementioned cases.
 		 */
 		if (w_step == 4 && ((width & 3) == 1)) {
 			wmax = width;
@@ -1384,12 +1385,12 @@ static int s5p_jpeg_s_fmt(struct s5p_jpeg_ctx *ct, struct v4l2_format *f)
 
 	/*
 	 * Prevent downscaling to YUV420 format by more than 2
-	 * for Exynos3250 SoC as it produces broken raw image
+	 * for Exynos3250/compatible SoC as it produces broken raw image
 	 * in such cases.
 	 */
 	if (ct->mode == S5P_JPEG_DECODE &&
 	    f_type == FMT_TYPE_CAPTURE &&
-	    ct->jpeg->variant->version == SJPEG_EXYNOS3250 &&
+	    ct->jpeg->variant->hw3250_compat &&
 	    pix->pixelformat == V4L2_PIX_FMT_YUV420 &&
 	    ct->scale_factor > 2) {
 		scale_rect.width = ct->out_q.w / 2;
@@ -1569,12 +1570,12 @@ static int s5p_jpeg_s_selection(struct file *file, void *fh,
 	if (s->target == V4L2_SEL_TGT_COMPOSE) {
 		if (ctx->mode != S5P_JPEG_DECODE)
 			return -EINVAL;
-		if (ctx->jpeg->variant->version == SJPEG_EXYNOS3250)
+		if (ctx->jpeg->variant->hw3250_compat)
 			ret = exynos3250_jpeg_try_downscale(ctx, rect);
 	} else if (s->target == V4L2_SEL_TGT_CROP) {
 		if (ctx->mode != S5P_JPEG_ENCODE)
 			return -EINVAL;
-		if (ctx->jpeg->variant->version == SJPEG_EXYNOS3250)
+		if (ctx->jpeg->variant->hw3250_compat)
 			ret = exynos3250_jpeg_try_crop(ctx, rect);
 	}
 
@@ -1604,8 +1605,9 @@ static int s5p_jpeg_adjust_subs_ctrl(struct s5p_jpeg_ctx *ctx, int *ctrl_val)
 	case SJPEG_S5P:
 		return 0;
 	case SJPEG_EXYNOS3250:
+	case SJPEG_EXYNOS5420:
 		/*
-		 * The exynos3250 device can produce JPEG image only
+		 * The exynos3250/compatible device can produce JPEG image only
 		 * of 4:4:4 subsampling when given RGB32 source image.
 		 */
 		if (ctx->out_q.fmt->fourcc == V4L2_PIX_FMT_RGB32)
@@ -1624,7 +1626,7 @@ static int s5p_jpeg_adjust_subs_ctrl(struct s5p_jpeg_ctx *ctx, int *ctrl_val)
 	}
 
 	/*
-	 * The exynos4x12 and exynos3250 devices require resulting
+	 * The exynos4x12 and exynos3250/compatible devices require resulting
 	 * jpeg subsampling not to be lower than the input raw image
 	 * subsampling.
 	 */
@@ -2017,6 +2019,16 @@ static void exynos3250_jpeg_device_run(void *priv)
 		exynos3250_jpeg_qtbl(jpeg->regs, 2, 1);
 		exynos3250_jpeg_qtbl(jpeg->regs, 3, 1);
 
+		/*
+		 * Some SoCs require setting Huffman tables before each run
+		 */
+		if (jpeg->variant->htbl_reinit) {
+			s5p_jpeg_set_hdctbl(jpeg->regs);
+			s5p_jpeg_set_hdctblg(jpeg->regs);
+			s5p_jpeg_set_hactbl(jpeg->regs);
+			s5p_jpeg_set_hactblg(jpeg->regs);
+		}
+
 		/* Y, Cb, Cr use Huffman table 0 */
 		exynos3250_jpeg_htbl_ac(jpeg->regs, 1);
 		exynos3250_jpeg_htbl_dc(jpeg->regs, 1);
@@ -2660,13 +2672,12 @@ static int s5p_jpeg_runtime_resume(struct device *dev)
 	/*
 	 * JPEG IP allows storing two Huffman tables for each component.
 	 * We fill table 0 for each component and do this here only
-	 * for S5PC210 and Exynos3250 SoCs. Exynos4x12 SoC requires
-	 * programming its Huffman tables each time the encoding process
-	 * is initialized, and thus it is accomplished in the device_run
-	 * callback of m2m_ops.
+	 * for S5PC210 and Exynos3250 SoCs. Exynos4x12 and Exynos542x SoC
+	 * require programming their Huffman tables each time the encoding
+	 * process is initialized, and thus it is accomplished in the
+	 * device_run callback of m2m_ops.
 	 */
-	if (jpeg->variant->version == SJPEG_S5P ||
-	    jpeg->variant->version == SJPEG_EXYNOS3250) {
+	if (!jpeg->variant->htbl_reinit) {
 		s5p_jpeg_set_hdctbl(jpeg->regs);
 		s5p_jpeg_set_hdctblg(jpeg->regs);
 		s5p_jpeg_set_hactbl(jpeg->regs);
@@ -2714,6 +2725,7 @@ static struct s5p_jpeg_variant exynos3250_jpeg_drvdata = {
 	.jpeg_irq	= exynos3250_jpeg_irq,
 	.m2m_ops	= &exynos3250_jpeg_m2m_ops,
 	.fmt_ver_flag	= SJPEG_FMT_FLAG_EXYNOS3250,
+	.hw3250_compat	= 1,
 };
 
 static struct s5p_jpeg_variant exynos4_jpeg_drvdata = {
@@ -2721,6 +2733,16 @@ static struct s5p_jpeg_variant exynos4_jpeg_drvdata = {
 	.jpeg_irq	= exynos4_jpeg_irq,
 	.m2m_ops	= &exynos4_jpeg_m2m_ops,
 	.fmt_ver_flag	= SJPEG_FMT_FLAG_EXYNOS4,
+	.htbl_reinit	= 1,
+};
+
+static struct s5p_jpeg_variant exynos5420_jpeg_drvdata = {
+	.version	= SJPEG_EXYNOS5420,
+	.jpeg_irq	= exynos3250_jpeg_irq,		/* intentionally 3250 */
+	.m2m_ops	= &exynos3250_jpeg_m2m_ops,	/* intentionally 3250 */
+	.fmt_ver_flag	= SJPEG_FMT_FLAG_EXYNOS3250,	/* intentionally 3250 */
+	.hw3250_compat	= 1,
+	.htbl_reinit	= 1,
 };
 
 static const struct of_device_id samsung_jpeg_match[] = {
@@ -2736,6 +2758,9 @@ static const struct of_device_id samsung_jpeg_match[] = {
 	}, {
 		.compatible = "samsung,exynos4212-jpeg",
 		.data = &exynos4_jpeg_drvdata,
+	}, {
+		.compatible = "samsung,exynos5420-jpeg",
+		.data = &exynos5420_jpeg_drvdata,
 	},
 	{},
 };

drivers/media/platform/s5p-jpeg/jpeg-core.h

@@ -67,10 +67,12 @@
 #define SJPEG_SUBSAMPLING_420	0x22
 
 /* Version numbers */
-
-#define SJPEG_S5P		1
-#define SJPEG_EXYNOS3250	2
-#define SJPEG_EXYNOS4		3
+enum sjpeg_version {
+	SJPEG_S5P,
+	SJPEG_EXYNOS3250,
+	SJPEG_EXYNOS4,
+	SJPEG_EXYNOS5420,
+};
 
 enum exynos4_jpeg_result {
 	OK_ENC_OR_DEC,
@@ -130,6 +132,8 @@ struct s5p_jpeg {
 struct s5p_jpeg_variant {
 	unsigned int		version;
 	unsigned int		fmt_ver_flag;
+	unsigned int		hw3250_compat:1;
+	unsigned int		htbl_reinit:1;
 	struct v4l2_m2m_ops	*m2m_ops;
 	irqreturn_t		(*jpeg_irq)(int irq, void *priv);
 };