On Wed, 6 Apr 2011, Teresa GÃmez wrote:
> This camera driver supports only rising edge, which is the default
> setting of the device. The function mt9m111_setup_pixfmt() overwrites
> this setting. So the driver actually uses falling edge.
> This patch corrects that.
Ok, this does indeed look like a bug in the driver. But this is not the
best way to fix the problem. We should extend the driver to properly
implement both pclk polarities _and_ adjust PXA270 boards, using this
chip: mioa701, ezx (twice), em-x270.
Thanks
Guennadi
>
> Signed-off-by: Teresa GÃmez <t.gamez@xxxxxxxxx>
> ---
> drivers/media/video/mt9m111.c | 14 ++++++++++++--
> 1 files changed, 12 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/media/video/mt9m111.c b/drivers/media/video/mt9m111.c
> index 53fa2a7..4040a96 100644
> --- a/drivers/media/video/mt9m111.c
> +++ b/drivers/media/video/mt9m111.c
> @@ -315,10 +315,20 @@ static int mt9m111_setup_rect(struct i2c_client *client,
> static int mt9m111_setup_pixfmt(struct i2c_client *client, u16 outfmt)
> {
> int ret;
> + u16 mask = MT9M111_OUTFMT_PROCESSED_BAYER | MT9M111_OUTFMT_RGB |
> + MT9M111_OUTFMT_BYPASS_IFP | MT9M111_OUTFMT_SWAP_RGB_EVEN |
> + MT9M111_OUTFMT_RGB565 | MT9M111_OUTFMT_RGB555 |
> + MT9M111_OUTFMT_SWAP_YCbCr_Cb_Cr |
> + MT9M111_OUTFMT_SWAP_YCbCr_C_Y;
>
> - ret = reg_write(OUTPUT_FORMAT_CTRL2_A, outfmt);
> + ret = reg_clear(OUTPUT_FORMAT_CTRL2_A, mask);
> if (!ret)
> - ret = reg_write(OUTPUT_FORMAT_CTRL2_B, outfmt);
> + ret = reg_set(OUTPUT_FORMAT_CTRL2_A, outfmt);
> + if (!ret)
> + ret = reg_clear(OUTPUT_FORMAT_CTRL2_B, mask);
> + if (!ret)
> + ret = reg_set(OUTPUT_FORMAT_CTRL2_B, outfmt);
> +
> return ret;
> }
>
> --
> 1.7.0.4
>
> --
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---
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer
http://www.open-technology.de/
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