[media] gspca_zc3xx: Fix JPEG quality setting code
The current code is using bits 0-1 of register 8 of the zc3xx controller to set the JPEG quality, but the correct bits are bits 1-2. Bit 0 selects between truncation or rounding in the quantization phase of the compression, since rounding generally gives better results it should thus always be 1. This patch also corrects the quality percentages which belong to the 4 different settings. Last this patch removes the different reg 8 defaults depending on the sensor type. Some of them where going for a default quality setting of 50%, which generally is not necessary in any way and results in poor image quality. 75% is a good default to use for all scenarios. Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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