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>
diff --git a/drivers/media/video/sh_mobile_ceu_camera.c b/drivers/media/video/sh_mobile_ceu_camera.c
index 47ffa44..31a0a97 100644
--- a/drivers/media/video/sh_mobile_ceu_camera.c
+++ b/drivers/media/video/sh_mobile_ceu_camera.c
@@ -96,6 +96,8 @@
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 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 @@
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 @@
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 @@
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 @@
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 @@
* 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 @@
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 @@
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 @@
__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 @@
if (pixfmt && !ret) {
icd->buswidth = xlate->buswidth;
icd->current_fmt = xlate->host_fmt;
+ pcdev->camera_fmt = xlate->cam_fmt;
}
return ret;