Hi Ahmad,
Thank you for the patch.
On Mon, Oct 17, 2022 at 08:28:09PM +0200, Ahmad Fatoum wrote:
> adv7511 probe may need to be attempted multiple times before no
> -EPROBE_DEFER is returned. Currently, every such probe results in
> an error message:
>
> [ 4.534229] adv7511 1-003d: failed to find dsi host
> [ 4.580288] adv7511 1-003d: failed to find dsi host
>
> This is misleading, as there is no error and probe deferral is normal
> behavior. Fix this by using dev_err_probe that will suppress
> -EPROBE_DEFER errors. While at it, we touch all dev_err in the probe
> path. This makes the code more concise and included the error code
> everywhere to aid user in debugging.
>
> Fixes: 1e4d58cd7f88 ("drm/bridge: adv7533: Create a MIPI DSI device")
> Signed-off-by: Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx>
> ---
> drivers/gpu/drm/bridge/adv7511/adv7511_drv.c | 6 ++----
> drivers/gpu/drm/bridge/adv7511/adv7533.c | 18 ++++++------------
> 2 files changed, 8 insertions(+), 16 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
> index 1c37779b434a..4148b6d6f151 100644
> --- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
> +++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
> @@ -1229,10 +1229,8 @@ static int adv7511_probe(struct i2c_client *i2c, const struct i2c_device_id *id)
> return ret;
>
> ret = adv7511_init_regulators(adv7511);
> - if (ret) {
> - dev_err(dev, "failed to init regulators\n");
> - return ret;
> - }
> + if (ret)
> + return dev_err_probe(dev, ret, "failed to init regulators\n");
>
> /*
> * The power down GPIO is optional. If present, toggle it from active to
> diff --git a/drivers/gpu/drm/bridge/adv7511/adv7533.c b/drivers/gpu/drm/bridge/adv7511/adv7533.c
> index ef6270806d1d..b32b796c25fb 100644
> --- a/drivers/gpu/drm/bridge/adv7511/adv7533.c
> +++ b/drivers/gpu/drm/bridge/adv7511/adv7533.c
> @@ -148,16 +148,12 @@ int adv7533_attach_dsi(struct adv7511 *adv)
> };
>
> host = of_find_mipi_dsi_host_by_node(adv->host_node);
> - if (!host) {
> - dev_err(dev, "failed to find dsi host\n");
> - return -EPROBE_DEFER;
> - }
> + if (!host)
> + return dev_err_probe(dev, -EPROBE_DEFER, "failed to find dsi host\n");
I'd wrap this line:
return dev_err_probe(dev, -EPROBE_DEFER,
"failed to find dsi host\n");
>
> dsi = devm_mipi_dsi_device_register_full(dev, host, &info);
> - if (IS_ERR(dsi)) {
> - dev_err(dev, "failed to create dsi device\n");
> - return PTR_ERR(dsi);
> - }
> + if (IS_ERR(dsi))
> + return dev_err_probe(dev, PTR_ERR(dsi), "failed to create dsi device\n");
Same here.
Reviewed-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
>
> adv->dsi = dsi;
>
> @@ -167,10 +163,8 @@ int adv7533_attach_dsi(struct adv7511 *adv)
> MIPI_DSI_MODE_NO_EOT_PACKET | MIPI_DSI_MODE_VIDEO_HSE;
>
> ret = devm_mipi_dsi_attach(dev, dsi);
> - if (ret < 0) {
> - dev_err(dev, "failed to attach dsi to host\n");
> - return ret;
> - }
> + if (ret < 0)
> + return dev_err_probe(dev, ret, "failed to attach dsi to host\n");
>
> return 0;
> }
--
Regards,
Laurent Pinchart
