On 2/19/21 1:52 PM, Lyude Paul wrote:
> Since we're about to be adding some more fields and update this
> documentation, let's rewrap it to the new column limit of 100 beforehand.
> No actual doc or functional changes are made here.
>
The preferred column limit is still 80.
For some (exceptional) cases, going up to 100 is OK,
but I don't see any reason here to go beyond 80.
> Signed-off-by: Lyude Paul <lyude@xxxxxxxxxx>
> ---
> include/drm/drm_dp_helper.h | 42 ++++++++++++++++---------------------
> 1 file changed, 18 insertions(+), 24 deletions(-)
>
> diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
> index edffd1dcca3e..2891a98eebc8 100644
> --- a/include/drm/drm_dp_helper.h
> +++ b/include/drm/drm_dp_helper.h
> @@ -1839,34 +1839,28 @@ struct drm_dp_aux_cec {
> * @crc_count: counter of captured frame CRCs
> * @transfer: transfers a message representing a single AUX transaction
> *
> - * The .dev field should be set to a pointer to the device that implements
> - * the AUX channel.
> + * The .dev field should be set to a pointer to the device that implements the AUX channel.
> *
> - * The .name field may be used to specify the name of the I2C adapter. If set to
> - * NULL, dev_name() of .dev will be used.
> + * The .name field may be used to specify the name of the I2C adapter. If set to NULL, dev_name() of
> + * .dev will be used.
> *
> - * Drivers provide a hardware-specific implementation of how transactions
> - * are executed via the .transfer() function. A pointer to a drm_dp_aux_msg
> - * structure describing the transaction is passed into this function. Upon
> - * success, the implementation should return the number of payload bytes
> - * that were transferred, or a negative error-code on failure. Helpers
> - * propagate errors from the .transfer() function, with the exception of
> - * the -EBUSY error, which causes a transaction to be retried. On a short,
> - * helpers will return -EPROTO to make it simpler to check for failure.
> + * Drivers provide a hardware-specific implementation of how transactions are executed via the
> + * .transfer() function. A pointer to a drm_dp_aux_msg structure describing the transaction is
> + * passed into this function. Upon success, the implementation should return the number of payload
> + * bytes that were transferred, or a negative error-code on failure. Helpers propagate errors from
> + * the .transfer() function, with the exception of the -EBUSY error, which causes a transaction to
> + * be retried. On a short, helpers will return -EPROTO to make it simpler to check for failure.
> *
> - * An AUX channel can also be used to transport I2C messages to a sink. A
> - * typical application of that is to access an EDID that's present in the
> - * sink device. The .transfer() function can also be used to execute such
> - * transactions. The drm_dp_aux_register() function registers an I2C
> - * adapter that can be passed to drm_probe_ddc(). Upon removal, drivers
> - * should call drm_dp_aux_unregister() to remove the I2C adapter.
> - * The I2C adapter uses long transfers by default; if a partial response is
> - * received, the adapter will drop down to the size given by the partial
> - * response for this transaction only.
> + * An AUX channel can also be used to transport I2C messages to a sink. A typical application of
> + * that is to access an EDID that's present in the sink device. The .transfer() function can also be
> + * used to execute such transactions. The drm_dp_aux_register() function registers an I2C adapter
> + * that can be passed to drm_probe_ddc(). Upon removal, drivers should call drm_dp_aux_unregister()
> + * to remove the I2C adapter. The I2C adapter uses long transfers by default; if a partial response
> + * is received, the adapter will drop down to the size given by the partial response for this
> + * transaction only.
> *
> - * Note that the aux helper code assumes that the .transfer() function
> - * only modifies the reply field of the drm_dp_aux_msg structure. The
> - * retry logic and i2c helpers assume this is the case.
> + * Note that the aux helper code assumes that the .transfer() function only modifies the reply field
> + * of the drm_dp_aux_msg structure. The retry logic and i2c helpers assume this is the case.
> */
> struct drm_dp_aux {
> const char *name;
>
--
~Randy
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