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[03/30] media: atmel: atmel-isc: add checks for limiting frame sizes

Message ID 20210401112723.189107-4-eugen.hristev@microchip.com
State Superseded
Headers show
Series media: atmel: atmel-isc: add support for xisc | expand

Commit Message

Eugen Hristev April 1, 2021, 11:26 a.m. UTC 
When calling the subdev, certain subdev drivers will overwrite the
frame size and adding sizes which are beyond the ISC's capabilities.
Thus we need to ensure the frame size is cropped to the maximum caps.

Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
---
 drivers/media/platform/atmel/atmel-isc-base.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)
diff mbox series

Patch

diff --git a/drivers/media/platform/atmel/atmel-isc-base.c b/drivers/media/platform/atmel/atmel-isc-base.c
index 277a8fd8b83d..45fc8dbb7943 100644
--- a/drivers/media/platform/atmel/atmel-isc-base.c
+++ b/drivers/media/platform/atmel/atmel-isc-base.c
@@ -1326,6 +1326,12 @@  static int isc_try_fmt(struct isc_device *isc, struct v4l2_format *f,
 
 	v4l2_fill_pix_format(pixfmt, &format.format);
 
+	/* Limit to Atmel ISC hardware capabilities */
+	if (pixfmt->width > ISC_MAX_SUPPORT_WIDTH)
+		pixfmt->width = ISC_MAX_SUPPORT_WIDTH;
+	if (pixfmt->height > ISC_MAX_SUPPORT_HEIGHT)
+		pixfmt->height = ISC_MAX_SUPPORT_HEIGHT;
+
 	pixfmt->field = V4L2_FIELD_NONE;
 	pixfmt->bytesperline = (pixfmt->width * isc->try_config.bpp) >> 3;
 	pixfmt->sizeimage = pixfmt->bytesperline * pixfmt->height;
@@ -1361,6 +1367,12 @@  static int isc_set_fmt(struct isc_device *isc, struct v4l2_format *f)
 	if (ret < 0)
 		return ret;
 
+	/* Limit to Atmel ISC hardware capabilities */
+	if (pixfmt->width > ISC_MAX_SUPPORT_WIDTH)
+		pixfmt->width = ISC_MAX_SUPPORT_WIDTH;
+	if (pixfmt->height > ISC_MAX_SUPPORT_HEIGHT)
+		pixfmt->height = ISC_MAX_SUPPORT_HEIGHT;
+
 	isc->fmt = *f;
 
 	if (isc->try_config.sd_format && isc->config.sd_format &&