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Subject: media: sun6i: Fix CSI regmap's max_register Author: Chen-Yu Tsai wens@csie.org Date: Sun Feb 3 11:03:56 2019 -0500
max_register is currently set to 0x1000. This is beyond the mapped address range of the hardware, so attempts to dump the regmap from debugfs would trigger a kernel exception.
Furthermore, the useful registers only occupy a small section at the beginning of the full range. Change the value to 0x9c, the last known register on the V3s and H3.
On the A31, the register range is extended to support additional capture channels. Since this is not yet supported, ignore it for now.
Fixes: 5cc7522d8965 ("media: sun6i: Add support for Allwinner CSI V3s")
Cc: stable@vger.kernel.org Signed-off-by: Chen-Yu Tsai wens@csie.org Acked-by: Maxime Ripard maxime.ripard@bootlin.com Signed-off-by: Hans Verkuil hverkuil-cisco@xs4all.nl Signed-off-by: Mauro Carvalho Chehab mchehab+samsung@kernel.org
drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c index 5ecdfbf9f6ae..457131c7f74a 100644 --- a/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c +++ b/drivers/media/platform/sunxi/sun6i-csi/sun6i_csi.c @@ -803,7 +803,7 @@ static const struct regmap_config sun6i_csi_regmap_config = { .reg_bits = 32, .reg_stride = 4, .val_bits = 32, - .max_register = 0x1000, + .max_register = 0x9c, };
static int sun6i_csi_resource_request(struct sun6i_csi_dev *sdev,