07.08.2020 06:18, Sowjanya Komatineni пишет:
On 8/6/20 8:14 PM, Sowjanya Komatineni wrote:I meant the start_calibration() will poll the ACTIVE bit (calibration
On 8/6/20 8:10 PM, Sowjanya Komatineni wrote:Based on internal design check from designer, as long as its in waiting
On 8/6/20 7:31 PM, Dmitry Osipenko wrote:Verified with HW designer. above is correct. ACTIVE bit update happens
06.08.2020 22:01, Sowjanya Komatineni пишет:Based on internal discussion, ACTIVE bit gets cleared when all
+int tegra_mipi_start_calibration(struct tegra_mipi_device *device)Could you please explain why the ACTIVE bit can't be polled instead of
const struct tegra_mipi_soc *soc = device->mipi->soc;
unsigned int i;
@@ -381,12 +375,16 @@ int tegra_mipi_calibrate(struct
value |= MIPI_CAL_CTRL_START;
tegra_mipi_writel(device->mipi, value, MIPI_CAL_CTRL);
+ * Wait for min 72uS to let calibration logic finish calibration
+ * sequence codes before waiting for pads idle state to apply the
+ * results.
+ usleep_range(75, 80);
using the fixed delay? Doesn't ACTIVE bit represents the state of the
enabled pads calibration is done (same time as when DONE set to 1).
Will request HW designer to look into design and confirm exactly when
ACTIVE bit gets cleared.
Will get back on this.
same time as DONE bit.
Active = !(DONE)
In case of calibration logic waiting for LP-11 where done bit does not
get set, ACTIVE will still be 1 and on next start trigger new
calibration will start
for LP-11 stage, next calibration request can be triggered again but
ACTIVE bit we will see it at 1. So we should check for DONE bits to
confirm if calibration is done or not.
To start next calibration, it can take effect as long as its in wait for
busy), while the finish_calibration() will poll the DONE bit