On 08/24/2016 04:25 AM, Milo Kim wrote:
> Handle legacy and raw 'ddc' parsing in single function.
> And it also removes goto condition.
>
> Cc: Kukjin Kim <kgene@xxxxxxxxxx>
> Cc: Krzysztof Kozlowski <k.kozlowski@xxxxxxxxxxx>
> Cc: David Airlie <airlied@xxxxxxxx>
> Cc: Inki Dae <inki.dae@xxxxxxxxxxx>
> Cc: Joonyoung Shim <jy0922.shim@xxxxxxxxxxx>
> Cc: Seung-Woo Kim <sw0312.kim@xxxxxxxxxxx>
> Cc: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
> Cc: Rob Herring <robh+dt@xxxxxxxxxx>
> Cc: devicetree@xxxxxxxxxxxxxxx
> Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
> Cc: linux-samsung-soc@xxxxxxxxxxxxxxx
> Cc: linux-kernel@xxxxxxxxxxxxxxx
> Cc: dri-devel@xxxxxxxxxxxxxxxxxxxxx
> Signed-off-by: Milo Kim <woogyom.kim@xxxxxxxxx>
> ---
> drivers/gpu/drm/exynos/exynos_hdmi.c | 18 +++++++++---------
> 1 file changed, 9 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c
> index 2275efe..6a636f2 100644
> --- a/drivers/gpu/drm/exynos/exynos_hdmi.c
> +++ b/drivers/gpu/drm/exynos/exynos_hdmi.c
> @@ -1760,7 +1760,7 @@ static const struct component_ops hdmi_component_ops = {
> .unbind = hdmi_unbind,
> };
>
> -static struct device_node *hdmi_legacy_ddc_dt_binding(struct device *dev)
> +static struct device_node *hdmi_ddc_dt_binding(struct device *dev)
> {
> const char *compatible_str = "samsung,exynos4210-hdmiddc";
> struct device_node *np;
> @@ -1769,7 +1769,13 @@ static struct device_node *hdmi_legacy_ddc_dt_binding(struct device *dev)
> if (np)
> return of_get_next_parent(np);
>
> - return NULL;
> + np = of_parse_phandle(dev->of_node, "ddc", 0);
> + if (!np)
> + return NULL;
> +
> + of_node_put(dev->of_node);
This is mistake introduced by other patch, of_node_put should be called on
np, after calling of_find_i2c_adapter_by_node. You can fix it in your
patch as well.
I think you can move of_find_i2c_adapter_by_node also to this function and
rename it to sth like hdmi_get_ddc_adapter, this way you will enclose
whole logic
of getting resource into one function.
Regards
Andrzej
> +
> + return np;
> }
>
> static struct device_node *hdmi_legacy_phy_dt_binding(struct device *dev)
> @@ -1811,18 +1817,12 @@ static int hdmi_probe(struct platform_device *pdev)
> return ret;
> }
>
> - ddc_node = hdmi_legacy_ddc_dt_binding(dev);
> - if (ddc_node)
> - goto out_get_ddc_adpt;
> -
> - ddc_node = of_parse_phandle(dev->of_node, "ddc", 0);
> + ddc_node = hdmi_ddc_dt_binding(dev);
> if (!ddc_node) {
> DRM_ERROR("Failed to find ddc node in device tree\n");
> return -ENODEV;
> }
> - of_node_put(dev->of_node);
>
> -out_get_ddc_adpt:
> hdata->ddc_adpt = of_find_i2c_adapter_by_node(ddc_node);
> if (!hdata->ddc_adpt) {
> DRM_ERROR("Failed to get ddc i2c adapter by node\n");
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