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Message-ID: <57736E19.7090900@rock-chips.com>
Date: Wed, 29 Jun 2016 14:43:37 +0800
From: Yakir Yang <ykk@...k-chips.com>
To: Sean Paul <seanpaul@...omium.org>
Cc: Mark Yao <yzq@...k-chips.com>, Inki Dae <inki.dae@...sung.com>,
Jingoo Han <jingoohan1@...il.com>,
Heiko Stuebner <heiko@...ech.de>,
Krzysztof Kozlowski <k.kozlowski@...sung.com>,
linux-samsung-soc <linux-samsung-soc@...r.kernel.org>,
linux-rockchip@...ts.infradead.org,
Daniel Vetter <daniel.vetter@...ll.ch>,
Emil Velikov <emil.l.velikov@...il.com>,
Douglas Anderson <dianders@...omium.org>,
dri-devel <dri-devel@...ts.freedesktop.org>,
Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
Javier Martinez Canillas <javier@....samsung.com>,
Tomasz Figa <tomasz.figa@...omium.com>,
Stéphane Marchesin <marcheu@...omium.org>,
Thierry Reding <treding@...dia.com>,
Dan Carpenter <dan.carpenter@...cle.com>
Subject: Re: [PATCH v3 06/10] drm/rockchip: analogix_dp: make panel detect to
an optional action
Sean,
On 06/23/2016 10:10 PM, Sean Paul wrote:
> On Tue, Jun 14, 2016 at 7:46 AM, Yakir Yang <ykk@...k-chips.com> wrote:
>> Some boards don't need to declare a panel device node, like the
>> display interface is DP monitors, so it's necessary to make the
>> panel detect to an optional action.
>>
>> Signed-off-by: Yakir Yang <ykk@...k-chips.com>
>> Acked-by: Mark Yao <mark.yao@...k-chips.com>
>> ---
>> Changes in v3:
>> - Add the acked flag from Mark.
>>
>> Changes in v2: None
>>
>> drivers/gpu/drm/rockchip/analogix_dp-rockchip.c | 48 ++++++++++++-------------
>> 1 file changed, 22 insertions(+), 26 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
>> index bcd9ecc..da2e844 100644
>> --- a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
>> +++ b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
>> @@ -332,38 +332,34 @@ static int rockchip_dp_probe(struct platform_device *pdev)
>> {
>> struct device *dev = &pdev->dev;
>> struct device_node *panel_node, *port, *endpoint;
>> + struct drm_panel *panel = NULL;
>> struct rockchip_dp_device *dp;
>> - struct drm_panel *panel;
>>
>> port = of_graph_get_port_by_id(dev->of_node, 1);
>> - if (!port) {
>> - dev_err(dev, "can't find output port\n");
>> - return -EINVAL;
>> - }
>> -
>> - endpoint = of_get_child_by_name(port, "endpoint");
>> - of_node_put(port);
>> - if (!endpoint) {
>> - dev_err(dev, "no output endpoint found\n");
>> - return -EINVAL;
>> - }
>> -
>> - panel_node = of_graph_get_remote_port_parent(endpoint);
>> - of_node_put(endpoint);
>> - if (!panel_node) {
>> - dev_err(dev, "no output node found\n");
>> - return -EINVAL;
>> - }
>> -
>> - panel = of_drm_find_panel(panel_node);
>> - if (!panel) {
>> - DRM_ERROR("failed to find panel\n");
>> + if (port) {
>> + endpoint = of_get_child_by_name(port, "endpoint");
>> + of_node_put(port);
>> + if (!endpoint) {
>> + dev_err(dev, "no output endpoint found\n");
>> + return -EINVAL;
>> + }
>> +
>> + panel_node = of_graph_get_remote_port_parent(endpoint);
>> + of_node_put(endpoint);
>> + if (!panel_node) {
>> + dev_err(dev, "no output node found\n");
>> + return -EINVAL;
>> + }
>> +
>> + panel = of_drm_find_panel(panel_node);
>> + if (!panel) {
>> + DRM_ERROR("failed to find panel\n");
>> + of_node_put(panel_node);
>> + return -EPROBE_DEFER;
>> + }
>> of_node_put(panel_node);
> Minor nit: Move of_node_put(panel_node) directly below
> of_drm_find_panel to avoid duplicating it in both error and normal
> paths (like you've done above).
Yep, done.
Thanks,
- Yakir
> Sean
>
>> - return -EPROBE_DEFER;
>> }
>>
>> - of_node_put(panel_node);
>> -
>> dp = devm_kzalloc(dev, sizeof(*dp), GFP_KERNEL);
>> if (!dp)
>> return -ENOMEM;
>> --
>> 1.9.1
>>
>>
>> _______________________________________________
>> dri-devel mailing list
>> dri-devel@...ts.freedesktop.org
>> https://lists.freedesktop.org/mailman/listinfo/dri-devel
>
>
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