On 7/16/20 4:06 PM, Sowjanya Komatineni wrote:
On 7/16/20 4:01 PM, Dmitry Osipenko wrote:
17.07.2020 01:49, Sowjanya Komatineni пишет:
What keeps MIPI clock enabled after completion of the
tegra_mipi_calibrate() invocation?
MIPI clock is disabled at end of tegra_mipi_calibrate and is re-enabled
during tegra_mipi_wait.
I think I should fix this to keep the clock enabled till calibration
results are latched.
All consumers of tegra_mipi_calibrate() will call tegra_mipi_wait().
So will remove clk_disable mipi clk at end of tegra_mipi_calibrate()
and
clk_enable mipi_clk at beginning of tegra_mipi_wait()
Isn't it possible to perform the calibration after enabling CSI and
before of starting the sensor streaming?
Currently this is what I am doing. Triggering calibration start during
CSI receiver being ready and then sensor streaming will happen where
internal MIPI CAL detects for LP -> HS transition and applies results
to pads. So checking for calibration results after sensor stream is
enabled
1. Calling tegra_mipi_calibrate() during CSI streaming where CSI pads
are enabled and receiver is kept ready
2. Start Sensor stream
3. Calling tegra_mipi_wait() to check for MIPI Cal status.
So as mipi cal clk need to be kept enabled till 3rd step, we can enable
clock during tegra_mipi_calibrate() and leave it enabled and disable it
in tegra_mipi_wait after status check.
