From 44c1febd7e6018b279d83e2c9725333be6b00f83 Mon Sep 17 00:00:00 2001 From: Sakari Ailus Date: Fri, 11 Dec 2020 23:15:04 +0100 Subject: [PATCH] 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 --- Documentation/driver-api/media/csi2.rst | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) 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 -- 2.7.4