Hi,
Am Mittwoch, 29. Mai 2024, 09:50:24 CEST schrieb Liu Ying:
> On 05/29/2024, Alexander Stein wrote:
> > Although very unlike to occur (media_blk_ctrl needs 'syscon' compatible
> > removed), it lines up with the other error paths in probe function.
>
> Why media_blk_ctrl needs 'syscon' compatible removed?
No, it does not. As media_blk_ctrl is also used as power-domain the device
will not even be probed if media_blk_ctrl is not available.
I just mentioned it under which conditions this error path could happen.
Best regards,
Alexander
> device_node_get_regmap may return error pointer other than
> ERR_PTR(-EPROBE_DEFER), like ERR_PTR(-ENOMEM).
>
> struct regmap *syscon_node_to_regmap(struct device_node *np)
> {
> if (!of_device_is_compatible(np, "syscon"))
> return ERR_PTR(-EINVAL);
>
> return device_node_get_regmap(np, true);
> }
> EXPORT_SYMBOL_GPL(syscon_node_to_regmap);
>
> Regard,
> Liu Ying
>
> >
> > Signed-off-by: Alexander Stein <alexander.stein@xxxxxxxxxxxxxxx>
> > ---
> > Changes in v2:
> > * Removed unused variable
> > * Added missing \n at end of string
> >
> > drivers/gpu/drm/bridge/imx/imx93-mipi-dsi.c | 9 +++------
> > 1 file changed, 3 insertions(+), 6 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/bridge/imx/imx93-mipi-dsi.c b/drivers/gpu/drm/bridge/imx/imx93-mipi-dsi.c
> > index 2347f8dd632f9..13025f47f3902 100644
> > --- a/drivers/gpu/drm/bridge/imx/imx93-mipi-dsi.c
> > +++ b/drivers/gpu/drm/bridge/imx/imx93-mipi-dsi.c
> > @@ -834,18 +834,15 @@ static int imx93_dsi_probe(struct platform_device *pdev)
> > struct device *dev = &pdev->dev;
> > struct device_node *np = dev->of_node;
> > struct imx93_dsi *dsi;
> > - int ret;
> >
> > dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL);
> > if (!dsi)
> > return -ENOMEM;
> >
> > dsi->regmap = syscon_regmap_lookup_by_phandle(np, "fsl,media-blk-ctrl");
> > - if (IS_ERR(dsi->regmap)) {
> > - ret = PTR_ERR(dsi->regmap);
> > - dev_err(dev, "failed to get block ctrl regmap: %d\n", ret);
> > - return ret;
> > - }
> > + if (IS_ERR(dsi->regmap))
> > + return dev_err_probe(dev, PTR_ERR(dsi->regmap),
> > + "failed to get block ctrl regmap\n");
> >
> > dsi->clk_pixel = devm_clk_get(dev, "pix");
> > if (IS_ERR(dsi->clk_pixel))
>
>
--
TQ-Systems GmbH | Mühlstraße 2, Gut Delling | 82229 Seefeld, Germany
Amtsgericht München, HRB 105018
Geschäftsführer: Detlef Schneider, Rüdiger Stahl, Stefan Schneider
http://www.tq-group.com/
