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[media] em28xx: VIDIOC_ENUM_FRAMESIZES: consider the scaler limits when calculating the minimum frame size
Output resolutions <=20% of the input resolution exceed the capabilities of the scaler. Signed-off-by: Frank Schäfer <fschaefer.oss@googlemail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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@ -1405,8 +1405,12 @@ static int vidioc_enum_framesizes(struct file *file, void *priv,
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/* Report a continuous range */
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fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
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fsize->stepwise.min_width = 48;
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fsize->stepwise.min_height = 32;
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scale_to_size(dev, EM28XX_HVSCALE_MAX, EM28XX_HVSCALE_MAX,
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&fsize->stepwise.min_width, &fsize->stepwise.min_height);
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if (fsize->stepwise.min_width < 48)
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fsize->stepwise.min_width = 48;
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if (fsize->stepwise.min_height < 38)
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fsize->stepwise.min_height = 38;
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fsize->stepwise.max_width = maxw;
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fsize->stepwise.max_height = maxh;
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fsize->stepwise.step_width = 1;
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