On 8/5/20 10:34 AM, Dmitry Osipenko wrote:
05.08.2020 20:29, Sowjanya Komatineni пишет:
...
UART_FST_MIPI_CAL is the clock used for calibration logic which is FSM
that goes thru sequence codes and when done waits for pads to be in
LP-11 to apply results.
MIPI_CLK is controller gate clock which is also need to be kept enabled
as incase if it sees LP-11 it updates registers so its recommended to
have this clock enabled.
We can cancel_calibration() in CSI only when csi/sensor stream on fails
and in which case there will be no LP-11 so we can unconditionally
disable MIPI_CLK.
There is no guarantee that the fail comes before the LP-11. For example,
some odd camera driver may have a complicated enable sequence which may
fail after enabling the hardware streaming.
MIPI_CLK to keep enable is for calibration logic to update results, but
like I said calibration logic uses UART_FST_MIPI_CAL clock. So even in
case if fail happens from sensor after having pads in LP-11 then,
calibration logic will still be running but result update will not
happen with clock disabled. But HW will not stuck as this is confirmed
from HW designer.
