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path: root/drivers/media/platform/pxa_camera.c
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Diffstat (limited to 'drivers/media/platform/pxa_camera.c')
-rw-r--r--drivers/media/platform/pxa_camera.c195
1 files changed, 54 insertions, 141 deletions
diff --git a/drivers/media/platform/pxa_camera.c b/drivers/media/platform/pxa_camera.c
index 6dce33f35041..e47520fcb93c 100644
--- a/drivers/media/platform/pxa_camera.c
+++ b/drivers/media/platform/pxa_camera.c
@@ -605,42 +605,6 @@ static const struct pxa_mbus_pixelfmt *pxa_mbus_get_fmtdesc(
return pxa_mbus_find_fmtdesc(code, mbus_fmt, ARRAY_SIZE(mbus_fmt));
}
-static unsigned int pxa_mbus_config_compatible(const struct v4l2_mbus_config *cfg,
- unsigned int flags)
-{
- unsigned long common_flags;
- bool hsync = true, vsync = true, pclk, data, mode;
- bool mipi_lanes, mipi_clock;
-
- common_flags = cfg->flags & flags;
-
- switch (cfg->type) {
- case V4L2_MBUS_PARALLEL:
- hsync = common_flags & (V4L2_MBUS_HSYNC_ACTIVE_HIGH |
- V4L2_MBUS_HSYNC_ACTIVE_LOW);
- vsync = common_flags & (V4L2_MBUS_VSYNC_ACTIVE_HIGH |
- V4L2_MBUS_VSYNC_ACTIVE_LOW);
- /* fall through */
- case V4L2_MBUS_BT656:
- pclk = common_flags & (V4L2_MBUS_PCLK_SAMPLE_RISING |
- V4L2_MBUS_PCLK_SAMPLE_FALLING);
- data = common_flags & (V4L2_MBUS_DATA_ACTIVE_HIGH |
- V4L2_MBUS_DATA_ACTIVE_LOW);
- mode = common_flags & (V4L2_MBUS_MASTER | V4L2_MBUS_SLAVE);
- return (!hsync || !vsync || !pclk || !data || !mode) ?
- 0 : common_flags;
- case V4L2_MBUS_CSI2_DPHY:
- mipi_lanes = common_flags & V4L2_MBUS_CSI2_LANES;
- mipi_clock = common_flags & (V4L2_MBUS_CSI2_NONCONTINUOUS_CLOCK |
- V4L2_MBUS_CSI2_CONTINUOUS_CLOCK);
- return (!mipi_lanes || !mipi_clock) ? 0 : common_flags;
- default:
- WARN_ON(1);
- return -EINVAL;
- }
- return 0;
-}
-
/**
* struct pxa_camera_format_xlate - match between host and sensor formats
* @code: code of a sensor provided format
@@ -1186,9 +1150,9 @@ static void pxa_camera_deactivate(struct pxa_camera_dev *pcdev)
clk_disable_unprepare(pcdev->clk);
}
-static void pxa_camera_eof(unsigned long arg)
+static void pxa_camera_eof(struct tasklet_struct *t)
{
- struct pxa_camera_dev *pcdev = (struct pxa_camera_dev *)arg;
+ struct pxa_camera_dev *pcdev = from_tasklet(pcdev, t, task_eof);
unsigned long cifr;
struct pxa_buffer *buf;
@@ -1231,31 +1195,6 @@ static irqreturn_t pxa_camera_irq(int irq, void *data)
return IRQ_HANDLED;
}
-static int test_platform_param(struct pxa_camera_dev *pcdev,
- unsigned char buswidth, unsigned long *flags)
-{
- /*
- * Platform specified synchronization and pixel clock polarities are
- * only a recommendation and are only used during probing. The PXA270
- * quick capture interface supports both.
- */
- *flags = (pcdev->platform_flags & PXA_CAMERA_MASTER ?
- V4L2_MBUS_MASTER : V4L2_MBUS_SLAVE) |
- V4L2_MBUS_HSYNC_ACTIVE_HIGH |
- V4L2_MBUS_HSYNC_ACTIVE_LOW |
- V4L2_MBUS_VSYNC_ACTIVE_HIGH |
- V4L2_MBUS_VSYNC_ACTIVE_LOW |
- V4L2_MBUS_DATA_ACTIVE_HIGH |
- V4L2_MBUS_PCLK_SAMPLE_RISING |
- V4L2_MBUS_PCLK_SAMPLE_FALLING;
-
- /* If requested data width is supported by the platform, use it */
- if ((1 << (buswidth - 1)) & pcdev->width_flags)
- return 0;
-
- return -EINVAL;
-}
-
static void pxa_camera_setup_cicr(struct pxa_camera_dev *pcdev,
unsigned long flags, __u32 pixfmt)
{
@@ -1598,99 +1537,78 @@ static int pxa_camera_init_videobuf2(struct pxa_camera_dev *pcdev)
*/
static int pxa_camera_set_bus_param(struct pxa_camera_dev *pcdev)
{
+ unsigned int bus_width = pcdev->current_fmt->host_fmt->bits_per_sample;
struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
u32 pixfmt = pcdev->current_fmt->host_fmt->fourcc;
- unsigned long bus_flags, common_flags;
+ int mbus_config;
int ret;
- ret = test_platform_param(pcdev,
- pcdev->current_fmt->host_fmt->bits_per_sample,
- &bus_flags);
- if (ret < 0)
- return ret;
-
- ret = sensor_call(pcdev, video, g_mbus_config, &cfg);
- if (!ret) {
- common_flags = pxa_mbus_config_compatible(&cfg,
- bus_flags);
- if (!common_flags) {
- dev_warn(pcdev_to_dev(pcdev),
- "Flags incompatible: camera 0x%x, host 0x%lx\n",
- cfg.flags, bus_flags);
- return -EINVAL;
- }
- } else if (ret != -ENOIOCTLCMD) {
- return ret;
- } else {
- common_flags = bus_flags;
+ if (!((1 << (bus_width - 1)) & pcdev->width_flags)) {
+ dev_err(pcdev_to_dev(pcdev), "Unsupported bus width %u",
+ bus_width);
+ return -EINVAL;
}
pcdev->channels = 1;
/* Make choices, based on platform preferences */
- if ((common_flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH) &&
- (common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)) {
- if (pcdev->platform_flags & PXA_CAMERA_HSP)
- common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_HIGH;
- else
- common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_LOW;
- }
+ mbus_config = 0;
+ if (pcdev->platform_flags & PXA_CAMERA_MASTER)
+ mbus_config |= V4L2_MBUS_MASTER;
+ else
+ mbus_config |= V4L2_MBUS_SLAVE;
- if ((common_flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH) &&
- (common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)) {
- if (pcdev->platform_flags & PXA_CAMERA_VSP)
- common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_HIGH;
- else
- common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_LOW;
- }
+ if (pcdev->platform_flags & PXA_CAMERA_HSP)
+ mbus_config |= V4L2_MBUS_HSYNC_ACTIVE_HIGH;
+ else
+ mbus_config |= V4L2_MBUS_HSYNC_ACTIVE_LOW;
- if ((common_flags & V4L2_MBUS_PCLK_SAMPLE_RISING) &&
- (common_flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)) {
- if (pcdev->platform_flags & PXA_CAMERA_PCP)
- common_flags &= ~V4L2_MBUS_PCLK_SAMPLE_RISING;
- else
- common_flags &= ~V4L2_MBUS_PCLK_SAMPLE_FALLING;
- }
+ if (pcdev->platform_flags & PXA_CAMERA_VSP)
+ mbus_config |= V4L2_MBUS_VSYNC_ACTIVE_HIGH;
+ else
+ mbus_config |= V4L2_MBUS_VSYNC_ACTIVE_LOW;
- cfg.flags = common_flags;
- ret = sensor_call(pcdev, video, s_mbus_config, &cfg);
+ if (pcdev->platform_flags & PXA_CAMERA_PCP)
+ mbus_config |= V4L2_MBUS_PCLK_SAMPLE_RISING;
+ else
+ mbus_config |= V4L2_MBUS_PCLK_SAMPLE_FALLING;
+ mbus_config |= V4L2_MBUS_DATA_ACTIVE_HIGH;
+
+ cfg.flags = mbus_config;
+ ret = sensor_call(pcdev, pad, set_mbus_config, 0, &cfg);
if (ret < 0 && ret != -ENOIOCTLCMD) {
- dev_dbg(pcdev_to_dev(pcdev),
- "camera s_mbus_config(0x%lx) returned %d\n",
- common_flags, ret);
+ dev_err(pcdev_to_dev(pcdev),
+ "Failed to call set_mbus_config: %d\n", ret);
return ret;
}
- pxa_camera_setup_cicr(pcdev, common_flags, pixfmt);
-
- return 0;
-}
-
-static int pxa_camera_try_bus_param(struct pxa_camera_dev *pcdev,
- unsigned char buswidth)
-{
- struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
- unsigned long bus_flags, common_flags;
- int ret = test_platform_param(pcdev, buswidth, &bus_flags);
-
- if (ret < 0)
- return ret;
+ /*
+ * If the requested media bus configuration has not been fully applied
+ * make sure it is supported by the platform.
+ *
+ * PXA does not support V4L2_MBUS_DATA_ACTIVE_LOW and the bus mastering
+ * roles should match.
+ */
+ if (cfg.flags != mbus_config) {
+ unsigned int pxa_mbus_role = mbus_config & (V4L2_MBUS_MASTER |
+ V4L2_MBUS_SLAVE);
+ if (pxa_mbus_role != (cfg.flags & (V4L2_MBUS_MASTER |
+ V4L2_MBUS_SLAVE))) {
+ dev_err(pcdev_to_dev(pcdev),
+ "Unsupported mbus configuration: bus mastering\n");
+ return -EINVAL;
+ }
- ret = sensor_call(pcdev, video, g_mbus_config, &cfg);
- if (!ret) {
- common_flags = pxa_mbus_config_compatible(&cfg,
- bus_flags);
- if (!common_flags) {
- dev_warn(pcdev_to_dev(pcdev),
- "Flags incompatible: camera 0x%x, host 0x%lx\n",
- cfg.flags, bus_flags);
+ if (cfg.flags & V4L2_MBUS_DATA_ACTIVE_LOW) {
+ dev_err(pcdev_to_dev(pcdev),
+ "Unsupported mbus configuration: DATA_ACTIVE_LOW\n");
return -EINVAL;
}
- } else if (ret == -ENOIOCTLCMD) {
- ret = 0;
}
- return ret;
+ pxa_camera_setup_cicr(pcdev, cfg.flags, pixfmt);
+
+ return 0;
}
static const struct pxa_mbus_pixelfmt pxa_camera_formats[] = {
@@ -1738,11 +1656,6 @@ static int pxa_camera_get_formats(struct v4l2_device *v4l2_dev,
return 0;
}
- /* This also checks support for the requested bits-per-sample */
- ret = pxa_camera_try_bus_param(pcdev, fmt->bits_per_sample);
- if (ret < 0)
- return 0;
-
switch (code.code) {
case MEDIA_BUS_FMT_UYVY8_2X8:
formats++;
@@ -2478,7 +2391,7 @@ static int pxa_camera_probe(struct platform_device *pdev)
goto exit_free_dma;
}
- tasklet_init(&pcdev->task_eof, pxa_camera_eof, (unsigned long)pcdev);
+ tasklet_setup(&pcdev->task_eof, pxa_camera_eof);
pxa_camera_activate(pcdev);