From: Sakari Ailus Date: Fri, 11 Dec 2020 22:15:04 +0000 (+0100) Subject: media: Documentation: media: Update pixel rate formula for C-PHY X-Git-Tag: accepted/tizen/unified/20230118.172025~7835^2~282 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=44c1febd7e6018b279d83e2c9725333be6b00f83;p=platform%2Fkernel%2Flinux-rpi.git media: Documentation: media: Update pixel rate formula for C-PHY Update the formula to calculate the pixel rate on the link for C-PHY. Signed-off-by: Sakari Ailus Signed-off-by: Mauro Carvalho Chehab --- diff --git a/Documentation/driver-api/media/csi2.rst b/Documentation/driver-api/media/csi2.rst index e3bbc6b..11c52b0 100644 --- a/Documentation/driver-api/media/csi2.rst +++ b/Documentation/driver-api/media/csi2.rst @@ -35,7 +35,7 @@ ability to start and stop the stream. The value of the V4L2_CID_PIXEL_RATE is calculated as follows:: - pixel_rate = link_freq * 2 * nr_of_lanes / bits_per_sample + pixel_rate = link_freq * 2 * nr_of_lanes * 16 / k / bits_per_sample where @@ -53,6 +53,8 @@ where - Two bits are transferred per clock cycle per lane. * - bits_per_sample - Number of bits per sample. + * - k + - 16 for D-PHY and 7 for C-PHY The transmitter drivers must, if possible, configure the CSI-2 transmitter to *LP-11 mode* whenever the transmitter is powered on but