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Subject[PATCH v2 12/15] [media] mtk-mipicsi: add function to get the format
Date
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@mediatek.com>
---
.../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
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