media: rcar-csi2: Correct the selection of hsfreqrange
hsfreqrange should be chosen based on the calculated mbps which is closer to the default bit rate and within the range as per table[1]. But current calculation always selects first value which is greater than or equal to the calculated mbps which may lead to chosing a wrong range in some cases. For example for 360 mbps for H3/M3N Existing logic selects Calculated value 360Mbps : Default 400Mbps Range [368.125 -433.125 mbps] This hsfreqrange is out of range. The logic is changed to get the default value which is closest to the calculated value [1] Calculated value 360Mbps : Default 350Mbps Range [320.625 -380.625 mpbs] [1] specs r19uh0105ej0200-r-car-3rd-generation.pdf [Table 25.9] Please note that According to Renesas in Table 25.9 the range for 220 default value is corrected as below |Range (Mbps) | Default Bit rate (Mbps) | ----------------------------------------------- | 197.125-244.125 | 220 | ----------------------------------------------- Fixes: 769afd21 ("media: rcar-csi2: add Renesas R-Car MIPI CSI-2 receiver driver") Signed-off-by:Suresh Udipi <sudipi@jp.adit-jv.com> Signed-off-by:
Kazuyoshi Akiyama <akiyama@nds-osk.co.jp> Signed-off-by:
Michael Rodin <mrodin@de.adit-jv.com> Reviewed-by:
Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> Signed-off-by:
Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by:
Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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