media: rkisp1: Fix endianness on raw streams on i.MX8MP

The i.MX8MP has extra register fields in the memory interface control
register for setting the output format, which work with the output
alignment format register for byte-swapping and LSB/MSB alignment.

With processed and 8-bit raw streams, it doesn't cause any problems to
not set these, but with raw streams of higher bit depth the endianness
is swapped and the data is not aligned properly.

Add support for setting these registers and plumb them in to fix this.

While at it, reflow a comment related to the forced configuration
update.

Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: Alexander Stein <alexander.stein@ew.tq-group.com>

2 files changed, 85 insertions, 12 deletions

diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c b/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c
index 0efdf8513de0..9e0e69052096 100644
--- a/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c
+++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-capture.c
@@ -48,14 +48,17 @@ enum rkisp1_plane {
  * @fmt_type: helper filed for pixel format
  * @uv_swap: if cb cr swapped, for yuv
  * @yc_swap: if y and cb/cr swapped, for yuv
+ * @byte_swap: if byte pairs are swapped, for raw
  * @write_format: defines how YCbCr self picture data is written to memory
- * @output_format: defines sp output format
+ * @output_format: defines the output format (RKISP1_CIF_MI_INIT_MP_OUTPUT_* for
+ *	the main path and RKISP1_MI_CTRL_SP_OUTPUT_* for the self path)
  * @mbus: the mbus code on the src resizer pad that matches the pixel format
  */
 struct rkisp1_capture_fmt_cfg {
 	u32 fourcc;
 	u32 uv_swap : 1;
 	u32 yc_swap : 1;
+	u32 byte_swap : 1;
 	u32 write_format;
 	u32 output_format;
 	u32 mbus;
@@ -96,42 +99,50 @@ static const struct rkisp1_capture_fmt_cfg rkisp1_mp_fmts[] = {
 		.fourcc = V4L2_PIX_FMT_YUYV,
 		.uv_swap = 0,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_YUVINT,
+		.output_format = RKISP1_CIF_MI_INIT_MP_OUTPUT_YUV422,
 		.mbus = MEDIA_BUS_FMT_YUYV8_2X8,
 	}, {
 		.fourcc = V4L2_PIX_FMT_UYVY,
 		.uv_swap = 0,
 		.yc_swap = 1,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_YUVINT,
+		.output_format = RKISP1_CIF_MI_INIT_MP_OUTPUT_YUV422,
 		.mbus = MEDIA_BUS_FMT_YUYV8_2X8,
 	}, {
 		.fourcc = V4L2_PIX_FMT_YUV422P,
 		.uv_swap = 0,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_YUV_PLA_OR_RAW8,
+		.output_format = RKISP1_CIF_MI_INIT_MP_OUTPUT_YUV422,
 		.mbus = MEDIA_BUS_FMT_YUYV8_2X8,
 	}, {
 		.fourcc = V4L2_PIX_FMT_NV16,
 		.uv_swap = 0,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_YUV_SPLA,
+		.output_format = RKISP1_CIF_MI_INIT_MP_OUTPUT_YUV422,
 		.mbus = MEDIA_BUS_FMT_YUYV8_2X8,
 	}, {
 		.fourcc = V4L2_PIX_FMT_NV61,
 		.uv_swap = 1,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_YUV_SPLA,
+		.output_format = RKISP1_CIF_MI_INIT_MP_OUTPUT_YUV422,
 		.mbus = MEDIA_BUS_FMT_YUYV8_2X8,
 	}, {
 		.fourcc = V4L2_PIX_FMT_NV16M,
 		.uv_swap = 0,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_YUV_SPLA,
+		.output_format = RKISP1_CIF_MI_INIT_MP_OUTPUT_YUV422,
 		.mbus = MEDIA_BUS_FMT_YUYV8_2X8,
 	}, {
 		.fourcc = V4L2_PIX_FMT_NV61M,
 		.uv_swap = 1,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_YUV_SPLA,
+		.output_format = RKISP1_CIF_MI_INIT_MP_OUTPUT_YUV422,
 		.mbus = MEDIA_BUS_FMT_YUYV8_2X8,
 	}, {
 		.fourcc = V4L2_PIX_FMT_YVU422M,
 		.uv_swap = 1,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_YUV_PLA_OR_RAW8,
+		.output_format = RKISP1_CIF_MI_INIT_MP_OUTPUT_YUV422,
 		.mbus = MEDIA_BUS_FMT_YUYV8_2X8,
 	},
 	/* yuv400 */
@@ -139,6 +150,7 @@ static const struct rkisp1_capture_fmt_cfg rkisp1_mp_fmts[] = {
 		.fourcc = V4L2_PIX_FMT_GREY,
 		.uv_swap = 0,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_YUV_PLA_OR_RAW8,
+		.output_format = RKISP1_CIF_MI_INIT_MP_OUTPUT_YUV400,
 		.mbus = MEDIA_BUS_FMT_YUYV8_2X8,
 	},
 	/* yuv420 */
@@ -146,81 +158,107 @@ static const struct rkisp1_capture_fmt_cfg rkisp1_mp_fmts[] = {
 		.fourcc = V4L2_PIX_FMT_NV21,
 		.uv_swap = 1,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_YUV_SPLA,
+		.output_format = RKISP1_CIF_MI_INIT_MP_OUTPUT_YUV420,
 		.mbus = MEDIA_BUS_FMT_YUYV8_1_5X8,
 	}, {
 		.fourcc = V4L2_PIX_FMT_NV12,
 		.uv_swap = 0,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_YUV_SPLA,
+		.output_format = RKISP1_CIF_MI_INIT_MP_OUTPUT_YUV420,
 		.mbus = MEDIA_BUS_FMT_YUYV8_1_5X8,
 	}, {
 		.fourcc = V4L2_PIX_FMT_NV21M,
 		.uv_swap = 1,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_YUV_SPLA,
+		.output_format = RKISP1_CIF_MI_INIT_MP_OUTPUT_YUV420,
 		.mbus = MEDIA_BUS_FMT_YUYV8_1_5X8,
 	}, {
 		.fourcc = V4L2_PIX_FMT_NV12M,
 		.uv_swap = 0,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_YUV_SPLA,
+		.output_format = RKISP1_CIF_MI_INIT_MP_OUTPUT_YUV420,
 		.mbus = MEDIA_BUS_FMT_YUYV8_1_5X8,
 	}, {
 		.fourcc = V4L2_PIX_FMT_YUV420,
 		.uv_swap = 0,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_YUV_PLA_OR_RAW8,
+		.output_format = RKISP1_CIF_MI_INIT_MP_OUTPUT_YUV420,
 		.mbus = MEDIA_BUS_FMT_YUYV8_1_5X8,
 	}, {
 		.fourcc = V4L2_PIX_FMT_YVU420,
 		.uv_swap = 1,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_YUV_PLA_OR_RAW8,
+		.output_format = RKISP1_CIF_MI_INIT_MP_OUTPUT_YUV420,
 		.mbus = MEDIA_BUS_FMT_YUYV8_1_5X8,
 	},
 	/* raw */
 	{
 		.fourcc = V4L2_PIX_FMT_SRGGB8,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_YUV_PLA_OR_RAW8,
+		.output_format = RKISP1_CIF_MI_INIT_MP_OUTPUT_RAW8,
 		.mbus = MEDIA_BUS_FMT_SRGGB8_1X8,
 	}, {
 		.fourcc = V4L2_PIX_FMT_SGRBG8,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_YUV_PLA_OR_RAW8,
+		.output_format = RKISP1_CIF_MI_INIT_MP_OUTPUT_RAW8,
 		.mbus = MEDIA_BUS_FMT_SGRBG8_1X8,
 	}, {
 		.fourcc = V4L2_PIX_FMT_SGBRG8,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_YUV_PLA_OR_RAW8,
+		.output_format = RKISP1_CIF_MI_INIT_MP_OUTPUT_RAW8,
 		.mbus = MEDIA_BUS_FMT_SGBRG8_1X8,
 	}, {
 		.fourcc = V4L2_PIX_FMT_SBGGR8,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_YUV_PLA_OR_RAW8,
+		.output_format = RKISP1_CIF_MI_INIT_MP_OUTPUT_RAW8,
 		.mbus = MEDIA_BUS_FMT_SBGGR8_1X8,
 	}, {
 		.fourcc = V4L2_PIX_FMT_SRGGB10,
+		.byte_swap = 1,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_RAW12,
+		.output_format = RKISP1_CIF_MI_INIT_MP_OUTPUT_RAW10,
 		.mbus = MEDIA_BUS_FMT_SRGGB10_1X10,
 	}, {
 		.fourcc = V4L2_PIX_FMT_SGRBG10,
+		.byte_swap = 1,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_RAW12,
+		.output_format = RKISP1_CIF_MI_INIT_MP_OUTPUT_RAW10,
 		.mbus = MEDIA_BUS_FMT_SGRBG10_1X10,
 	}, {
 		.fourcc = V4L2_PIX_FMT_SGBRG10,
+		.byte_swap = 1,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_RAW12,
+		.output_format = RKISP1_CIF_MI_INIT_MP_OUTPUT_RAW10,
 		.mbus = MEDIA_BUS_FMT_SGBRG10_1X10,
 	}, {
 		.fourcc = V4L2_PIX_FMT_SBGGR10,
+		.byte_swap = 1,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_RAW12,
+		.output_format = RKISP1_CIF_MI_INIT_MP_OUTPUT_RAW10,
 		.mbus = MEDIA_BUS_FMT_SBGGR10_1X10,
 	}, {
 		.fourcc = V4L2_PIX_FMT_SRGGB12,
+		.byte_swap = 1,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_RAW12,
+		.output_format = RKISP1_CIF_MI_INIT_MP_OUTPUT_RAW12,
 		.mbus = MEDIA_BUS_FMT_SRGGB12_1X12,
 	}, {
 		.fourcc = V4L2_PIX_FMT_SGRBG12,
+		.byte_swap = 1,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_RAW12,
+		.output_format = RKISP1_CIF_MI_INIT_MP_OUTPUT_RAW12,
 		.mbus = MEDIA_BUS_FMT_SGRBG12_1X12,
 	}, {
 		.fourcc = V4L2_PIX_FMT_SGBRG12,
+		.byte_swap = 1,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_RAW12,
+		.output_format = RKISP1_CIF_MI_INIT_MP_OUTPUT_RAW12,
 		.mbus = MEDIA_BUS_FMT_SGBRG12_1X12,
 	}, {
 		.fourcc = V4L2_PIX_FMT_SBGGR12,
+		.byte_swap = 1,
 		.write_format = RKISP1_MI_CTRL_MP_WRITE_RAW12,
+		.output_format = RKISP1_CIF_MI_INIT_MP_OUTPUT_RAW12,
 		.mbus = MEDIA_BUS_FMT_SBGGR12_1X12,
 	},
 };
@@ -484,11 +522,16 @@ static void rkisp1_mp_config(struct rkisp1_capture *cap)
 	 */
 	if (rkisp1_has_feature(rkisp1, MAIN_STRIDE)) {
 		reg = rkisp1_read(rkisp1, RKISP1_CIF_MI_OUTPUT_ALIGN_FORMAT);
-		if (cap->pix.cfg->yc_swap)
+		if (cap->pix.cfg->yc_swap || cap->pix.cfg->byte_swap)
 			reg |= RKISP1_CIF_OUTPUT_ALIGN_FORMAT_MP_BYTE_SWAP_BYTES;
 		else
 			reg &= ~RKISP1_CIF_OUTPUT_ALIGN_FORMAT_MP_BYTE_SWAP_BYTES;
+
+		reg |= RKISP1_CIF_OUTPUT_ALIGN_FORMAT_MP_LSB_ALIGNMENT;
 		rkisp1_write(rkisp1, RKISP1_CIF_MI_OUTPUT_ALIGN_FORMAT, reg);
+
+		rkisp1_write(rkisp1, RKISP1_CIF_MI_INIT,
+			     cap->pix.cfg->output_format);
 	}
 
 	rkisp1_mi_config_ctrl(cap);
@@ -951,19 +994,40 @@ static void rkisp1_cap_stream_enable(struct rkisp1_capture *cap)
 	spin_lock_irq(&cap->buf.lock);
 	rkisp1_set_next_buf(cap);
 	cap->ops->enable(cap);
-	/* It's safe to configure ACTIVE and SHADOW registers for the
-	 * first stream. While when the second is starting, do NOT
-	 * force update because it also updates the first one.
+
+	/*
+	 * It's safe to configure ACTIVE and SHADOW registers for the first
+	 * stream. While when the second is starting, do NOT force update
+	 * because it also updates the first one.
 	 *
-	 * The latter case would drop one more buffer(that is 2) since
-	 * there's no buffer in a shadow register when the second FE received.
-	 * This's also required because the second FE maybe corrupt
-	 * especially when run at 120fps.
+	 * The latter case would drop one more buffer(that is 2) since there's
+	 * no buffer in a shadow register when the second FE received. This's
+	 * also required because the second FE maybe corrupt especially when
+	 * run at 120fps.
 	 */
 	if (!has_self_path || !other->is_streaming) {
-		/* force cfg update */
-		rkisp1_write(rkisp1, RKISP1_CIF_MI_INIT,
-			     RKISP1_CIF_MI_INIT_SOFT_UPD);
+		u32 reg;
+
+		/*
+		 * Force cfg update.
+		 *
+		 * The ISP8000 (implementing the MAIN_STRIDE feature) as a
+		 * mp_output_format field in the CIF_MI_INIT register that must
+		 * be preserved. It can be read back, but it is not clear what
+		 * other register bits will return. Mask them out.
+		 *
+		 * On Rockchip platforms, the CIF_MI_INIT register is marked as
+		 * write-only and reads as zeros. We can skip reading it.
+		 */
+		if (rkisp1_has_feature(rkisp1, MAIN_STRIDE))
+			reg = rkisp1_read(rkisp1, RKISP1_CIF_MI_INIT)
+			    & RKISP1_CIF_MI_INIT_MP_OUTPUT_MASK;
+		else
+			reg = 0;
+
+		reg |= RKISP1_CIF_MI_INIT_SOFT_UPD;
+		rkisp1_write(rkisp1, RKISP1_CIF_MI_INIT, reg);
+
 		rkisp1_set_next_buf(cap);
 	}
 	spin_unlock_irq(&cap->buf.lock);
diff --git a/drivers/media/platform/rockchip/rkisp1/rkisp1-regs.h b/drivers/media/platform/rockchip/rkisp1/rkisp1-regs.h
index 3b19c8411360..fccf4c17ee8d 100644
--- a/drivers/media/platform/rockchip/rkisp1/rkisp1-regs.h
+++ b/drivers/media/platform/rockchip/rkisp1/rkisp1-regs.h
@@ -144,6 +144,15 @@
 /* MI_INIT */
 #define RKISP1_CIF_MI_INIT_SKIP				BIT(2)
 #define RKISP1_CIF_MI_INIT_SOFT_UPD			BIT(4)
+#define RKISP1_CIF_MI_INIT_MP_OUTPUT_YUV400		(0 << 5)
+#define RKISP1_CIF_MI_INIT_MP_OUTPUT_YUV420		(1 << 5)
+#define RKISP1_CIF_MI_INIT_MP_OUTPUT_YUV422		(2 << 5)
+#define RKISP1_CIF_MI_INIT_MP_OUTPUT_YUV444		(3 << 5)
+#define RKISP1_CIF_MI_INIT_MP_OUTPUT_RAW12		(4 << 5)
+#define RKISP1_CIF_MI_INIT_MP_OUTPUT_RAW8		(5 << 5)
+#define RKISP1_CIF_MI_INIT_MP_OUTPUT_JPEG		(6 << 5)
+#define RKISP1_CIF_MI_INIT_MP_OUTPUT_RAW10		(7 << 5)
+#define RKISP1_CIF_MI_INIT_MP_OUTPUT_MASK		(15 << 5)
 
 /* MI_CTRL_SHD */
 #define RKISP1_CIF_MI_CTRL_SHD_MP_IN_ENABLED		BIT(0)