This patch add function to get the format
This function can get the subdev format and host format.
Calculate the number of format which intersection of subdev and host.
Signed-off-by: Stu Hsieh <stu.hsieh@xxxxxxxxxxxx>
---
.../media/platform/mtk-mipicsi/mtk_mipicsi.c | 148 ++++++++++++++++++
1 file changed, 148 insertions(+)
diff --git a/drivers/media/platform/mtk-mipicsi/mtk_mipicsi.c b/drivers/media/platform/mtk-mipicsi/mtk_mipicsi.c
index 4027ed9c94f3..5e4028d0d5e1 100644
--- a/drivers/media/platform/mtk-mipicsi/mtk_mipicsi.c
+++ b/drivers/media/platform/mtk-mipicsi/mtk_mipicsi.c
@@ -163,6 +163,50 @@ struct mtk_mipicsi_dev {
u32 bytesperline;
};
+static const struct soc_mbus_lookup mtk_mipicsi_formats[] = {
+{
+ .code = MEDIA_BUS_FMT_YUYV8_2X8,
+ .fmt = {
+ .fourcc = V4L2_PIX_FMT_YUYV,
+ .name = "YUYV",
+ .bits_per_sample = 8,
+ .packing = SOC_MBUS_PACKING_2X8_PADHI,
+ .order = SOC_MBUS_ORDER_LE,
+ .layout = SOC_MBUS_LAYOUT_PACKED,
+ },
+}, {
+ .code = MEDIA_BUS_FMT_YVYU8_2X8,
+ .fmt = {
+ .fourcc = V4L2_PIX_FMT_YVYU,
+ .name = "YVYU",
+ .bits_per_sample = 8,
+ .packing = SOC_MBUS_PACKING_2X8_PADHI,
+ .order = SOC_MBUS_ORDER_LE,
+ .layout = SOC_MBUS_LAYOUT_PACKED,
+ },
+}, {
+ .code = MEDIA_BUS_FMT_UYVY8_2X8,
+ .fmt = {
+ .fourcc = V4L2_PIX_FMT_UYVY,
+ .name = "UYVY",
+ .bits_per_sample = 8,
+ .packing = SOC_MBUS_PACKING_2X8_PADHI,
+ .order = SOC_MBUS_ORDER_LE,
+ .layout = SOC_MBUS_LAYOUT_PACKED,
+ },
+}, {
+ .code = MEDIA_BUS_FMT_VYUY8_2X8,
+ .fmt = {
+ .fourcc = V4L2_PIX_FMT_VYUY,
+ .name = "VYUY",
+ .bits_per_sample = 8,
+ .packing = SOC_MBUS_PACKING_2X8_PADHI,
+ .order = SOC_MBUS_ORDER_LE,
+ .layout = SOC_MBUS_LAYOUT_PACKED,
+ },
+},
+};
+
#define MTK_MIPICSI_BUS_PARAM (V4L2_MBUS_MASTER | \
V4L2_MBUS_HSYNC_ACTIVE_HIGH | \
V4L2_MBUS_HSYNC_ACTIVE_LOW | \
@@ -207,6 +251,43 @@ static void mtk_mipicsi_ana_clk_enable(void __iomem *base, bool enable)
}
}
+static int mtk_mipicsi_try_bus_param(struct soc_camera_device *icd,
+ unsigned char buswidth)
+{
+ struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
+ struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
+ struct mtk_mipicsi_dev *mipicsi = ici->priv;
+ struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_CSI2_DPHY,};
+ unsigned long common_flags = 0;
+ int ret = 0;
+
+ ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
+ if (ret == 0) {
+ common_flags = soc_mbus_config_compatible(&cfg,
+ MTK_MIPICSI_BUS_PARAM);
+ if (common_flags == 0U) {
+ dev_warn(icd->parent, "Flags incompatible: camera 0x%x\n",
+ cfg.flags);
+ return -EINVAL;
+ }
+ } else {
+ if (ret != -ENOIOCTLCMD)
+ return ret;
+ }
+
+ if ((((u16)1U << (buswidth - 1U)) & mipicsi->width_flags) != 0U)
+ return 0;
+
+ return -EINVAL;
+}
+
+static bool mtk_mipicsi_packing_supported(const struct soc_mbus_pixelfmt *fmt)
+{
+ return fmt->packing == SOC_MBUS_PACKING_NONE ||
+ (fmt->bits_per_sample == 8U &&
+ fmt->packing == SOC_MBUS_PACKING_2X8_PADHI);
+}
+
static int get_subdev_register(const struct soc_camera_device *icd,
struct v4l2_dbg_register *reg)
{
@@ -330,6 +411,72 @@ static void mtk_mipicsi_remove_device(struct soc_camera_device *icd)
(void)pm_runtime_put_sync(icd->parent);
}
+static int mtk_mipicsi_get_formats(struct soc_camera_device *icd,
+ unsigned int idx, struct soc_camera_format_xlate *xlate)
+{
+ struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
+ int formats = 0, ret, i;
+ int n = ARRAY_SIZE(mtk_mipicsi_formats);
+
+ struct v4l2_subdev_mbus_code_enum mbus_code = {
+ .which = V4L2_SUBDEV_FORMAT_ACTIVE,
+ .index = idx,
+ };
+ /* subdev format */
+ const struct soc_mbus_pixelfmt *fmt;
+
+ ret = v4l2_subdev_call(sd, pad, enum_mbus_code, NULL, &mbus_code);
+ if (ret < 0)
+ /* No more formats */
+ return 0;
+
+ /* get subdev support format */
+ fmt = soc_mbus_get_fmtdesc(mbus_code.code);
+ if (fmt == NULL) {
+ dev_err(icd->parent, "Invalid format code #%u: %d",
+ idx, mbus_code.code);
+ return 0;
+ }
+
+ /* This also checks support for the requested bits-per-sample */
+ ret = mtk_mipicsi_try_bus_param(icd, fmt->bits_per_sample);
+ if (ret < 0) {
+ dev_err(icd->parent, "Fail to try the bus parameters.\n");
+ return 0;
+ }
+
+ switch (mbus_code.code) {
+ case MEDIA_BUS_FMT_UYVY8_2X8:
+ case MEDIA_BUS_FMT_VYUY8_2X8:
+ case MEDIA_BUS_FMT_YUYV8_2X8:
+ case MEDIA_BUS_FMT_YVYU8_2X8:
+ dev_dbg(icd->parent, "Providing format %s using code %d\n",
+ fmt->name, mbus_code.code);
+ break;
+ default:
+ if (!mtk_mipicsi_packing_supported(fmt))
+ return 0;
+ if (xlate != NULL)
+ dev_dbg(icd->parent,
+ "Providing format %s in pass-through mode\n",
+ fmt->name);
+ break;
+ }
+
+ /* get camera host and subdev format intersection */
+ for (i = 0; i < n; ++i)
+ if (mtk_mipicsi_formats[i].fmt.fourcc == fmt->fourcc) {
+ ++formats;
+ if (xlate != NULL) {
+ xlate->host_fmt = &mtk_mipicsi_formats[i].fmt;
+ xlate->code = mbus_code.code;
+ xlate++;
+ }
+ }
+
+ return formats;
+}
+
static bool is_supported(const u32 pixformat)
{
switch (pixformat) {
@@ -730,6 +877,7 @@ static struct soc_camera_host_ops mtk_soc_camera_host_ops = {
.owner = THIS_MODULE,
.add = mtk_mipicsi_add_device,
.remove = mtk_mipicsi_remove_device,
+ .get_formats = mtk_mipicsi_get_formats,
.set_fmt = mtk_mipicsi_set_fmt,
.try_fmt = mtk_mipicsi_try_fmt,
.init_videobuf2 = mtk_mipicsi_init_videobuf2,
--
2.18.0
