V4L/DVB (10084): sh_mobile_ceu: add NV12 and NV21 support

This patch adds NV12/NV21 support to the sh_mobile_ceu driver.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 99 insertions, 15 deletions

diff --git a/drivers/media/video/sh_mobile_ceu_camera.c b/drivers/media/video/sh_mobile_ceu_camera.c
index 47ffa441c869..31a0a9769a3f 100644
--- a/drivers/media/video/sh_mobile_ceu_camera.c
+++ b/drivers/media/video/sh_mobile_ceu_camera.c
@@ -96,6 +96,8 @@ struct sh_mobile_ceu_dev {
         struct videobuf_buffer *active;
 
         struct sh_mobile_ceu_info *pdata;
+
+        const struct soc_camera_data_format *camera_fmt;
 };
 
 static void ceu_write(struct sh_mobile_ceu_dev *priv,
@@ -155,6 +157,9 @@ static void free_buffer(struct videobuf_queue *vq,
 
 static void sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev)
 {
+        struct soc_camera_device *icd = pcdev->icd;
+        unsigned long phys_addr;
+
         ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) & ~1);
         ceu_write(pcdev, CETCR, ~ceu_read(pcdev, CETCR) & 0x0317f313);
         ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) | 1);
@@ -163,11 +168,21 @@ static void sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev)
 
         ceu_write(pcdev, CETCR, 0x0317f313 ^ 0x10);
 
-        if (pcdev->active) {
-                pcdev->active->state = VIDEOBUF_ACTIVE;
-                ceu_write(pcdev, CDAYR, videobuf_to_dma_contig(pcdev->active));
-                ceu_write(pcdev, CAPSR, 0x1); /* start capture */
+        if (!pcdev->active)
+                return;
+
+        phys_addr = videobuf_to_dma_contig(pcdev->active);
+        ceu_write(pcdev, CDAYR, phys_addr);
+
+        switch (icd->current_fmt->fourcc) {
+        case V4L2_PIX_FMT_NV12:
+        case V4L2_PIX_FMT_NV21:
+                phys_addr += (icd->width * icd->height);
+                ceu_write(pcdev, CDACR, phys_addr);
         }
+
+        pcdev->active->state = VIDEOBUF_ACTIVE;
+        ceu_write(pcdev, CAPSR, 0x1); /* start capture */
 }
 
 static int sh_mobile_ceu_videobuf_prepare(struct videobuf_queue *vq,
@@ -359,6 +374,7 @@ static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd,
         struct sh_mobile_ceu_dev *pcdev = ici->priv;
         int ret, buswidth, width, cfszr_width, cdwdr_width;
         unsigned long camera_flags, common_flags, value;
+        int yuv_mode, yuv_lineskip;
 
         camera_flags = icd->ops->query_bus_param(icd);
         common_flags = soc_camera_bus_param_compatible(camera_flags,
@@ -384,7 +400,35 @@ static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd,
         ceu_write(pcdev, CRCNTR, 0);
         ceu_write(pcdev, CRCMPR, 0);
 
-        value = 0x00000010;
+        value = 0x00000010; /* data fetch by default */
+        yuv_mode = yuv_lineskip = 0;
+
+        switch (icd->current_fmt->fourcc) {
+        case V4L2_PIX_FMT_NV12:
+        case V4L2_PIX_FMT_NV21:
+                yuv_lineskip = 1; /* skip for NV12/21, no skip for NV16/61 */
+                yuv_mode = 1;
+                switch (pcdev->camera_fmt->fourcc) {
+                case V4L2_PIX_FMT_UYVY:
+                        value = 0x00000000; /* Cb0, Y0, Cr0, Y1 */
+                        break;
+                case V4L2_PIX_FMT_VYUY:
+                        value = 0x00000100; /* Cr0, Y0, Cb0, Y1 */
+                        break;
+                case V4L2_PIX_FMT_YUYV:
+                        value = 0x00000200; /* Y0, Cb0, Y1, Cr0 */
+                        break;
+                case V4L2_PIX_FMT_YVYU:
+                        value = 0x00000300; /* Y0, Cr0, Y1, Cb0 */
+                        break;
+                default:
+                        BUG();
+                }
+        }
+
+        if (icd->current_fmt->fourcc == V4L2_PIX_FMT_NV21)
+                value ^= 0x00000100; /* swap U, V to change from NV12->NV21 */
+
         value |= (common_flags & SOCAM_VSYNC_ACTIVE_LOW) ? (1 << 1) : 0;
         value |= (common_flags & SOCAM_HSYNC_ACTIVE_LOW) ? (1 << 0) : 0;
         value |= (buswidth == 16) ? (1 << 12) : 0;
@@ -395,16 +439,22 @@ static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd,
 
         mdelay(1);
 
-        width = icd->width * (icd->current_fmt->depth / 8);
-        width = (buswidth == 16) ? width / 2 : width;
-        cfszr_width = (buswidth == 8) ? width / 2 : width;
-        cdwdr_width = (buswidth == 16) ? width * 2 : width;
+        if (yuv_mode) {
+                width = icd->width * 2;
+                width = (buswidth == 16) ? width / 2 : width;
+                cfszr_width = cdwdr_width = icd->width;
+        } else {
+                width = icd->width * ((icd->current_fmt->depth + 7) >> 3);
+                width = (buswidth == 16) ? width / 2 : width;
+                cfszr_width = (buswidth == 8) ? width / 2 : width;
+                cdwdr_width = (buswidth == 16) ? width * 2 : width;
+        }
 
         ceu_write(pcdev, CAMOR, 0);
         ceu_write(pcdev, CAPWR, (icd->height << 16) | width);
-        ceu_write(pcdev, CFLCR, 0); /* data fetch mode - no scaling */
+        ceu_write(pcdev, CFLCR, 0); /* no scaling */
         ceu_write(pcdev, CFSZR, (icd->height << 16) | cfszr_width);
-        ceu_write(pcdev, CLFCR, 0); /* data fetch mode - no lowpass filter */
+        ceu_write(pcdev, CLFCR, 0); /* no lowpass filter */
 
         /* A few words about byte order (observed in Big Endian mode)
          *
@@ -418,14 +468,16 @@ static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd,
          * using 7 we swap the data bytes to match the incoming order:
          * D0, D1, D2, D3, D4, D5, D6, D7
          */
-        ceu_write(pcdev, CDOCR, 0x00000017);
+        value = 0x00000017;
+        if (yuv_lineskip)
+                value &= ~0x00000010; /* convert 4:2:2 -> 4:2:0 */
+
+        ceu_write(pcdev, CDOCR, value);
 
         ceu_write(pcdev, CDWDR, cdwdr_width);
         ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */
 
         /* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */
-        /* in data fetch mode: no need for CDACR, CDBYR, CDBCR */
-
         return 0;
 }
 
@@ -444,11 +496,26 @@ static int sh_mobile_ceu_try_bus_param(struct soc_camera_device *icd)
         return 0;
 }
 
+static const struct soc_camera_data_format sh_mobile_ceu_formats[] = {
+        {
+                .name           = "NV12",
+                .depth          = 12,
+                .fourcc         = V4L2_PIX_FMT_NV12,
+                .colorspace     = V4L2_COLORSPACE_JPEG,
+        },
+        {
+                .name           = "NV21",
+                .depth          = 12,
+                .fourcc         = V4L2_PIX_FMT_NV21,
+                .colorspace     = V4L2_COLORSPACE_JPEG,
+        },
+};
+
 static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, int idx,
                                      struct soc_camera_format_xlate *xlate)
 {
         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
-        int ret;
+        int ret, k, n;
         int formats = 0;
 
         ret = sh_mobile_ceu_try_bus_param(icd);
@@ -456,6 +523,21 @@ static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, int idx,
                 return 0;
 
         switch (icd->formats[idx].fourcc) {
+        case V4L2_PIX_FMT_UYVY:
+        case V4L2_PIX_FMT_VYUY:
+        case V4L2_PIX_FMT_YUYV:
+        case V4L2_PIX_FMT_YVYU:
+                n = ARRAY_SIZE(sh_mobile_ceu_formats);
+                formats += n;
+                for (k = 0; xlate && k < n; k++) {
+                        xlate->host_fmt = &sh_mobile_ceu_formats[k];
+                        xlate->cam_fmt = icd->formats + idx;
+                        xlate->buswidth = icd->formats[idx].depth;
+                        xlate++;
+                        dev_dbg(&ici->dev, "Providing format %s using %s\n",
+                                sh_mobile_ceu_formats[k].name,
+                                icd->formats[idx].name);
+                }
         default:
                 /* Generic pass-through */
                 formats++;
@@ -477,6 +559,7 @@ static int sh_mobile_ceu_set_fmt(struct soc_camera_device *icd,
                                  __u32 pixfmt, struct v4l2_rect *rect)
 {
         struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
+        struct sh_mobile_ceu_dev *pcdev = ici->priv;
         const struct soc_camera_format_xlate *xlate;
         int ret;
 
@@ -497,6 +580,7 @@ static int sh_mobile_ceu_set_fmt(struct soc_camera_device *icd,
         if (pixfmt && !ret) {
                 icd->buswidth = xlate->buswidth;
                 icd->current_fmt = xlate->host_fmt;
+                pcdev->camera_fmt = xlate->cam_fmt;
         }
 
         return ret;