| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <bdd6e4dac0db87cf8f2c6e23b2b679cf58b9f3a8.camel@mediatek.com>
Date: Mon, 10 Feb 2025 06:22:00 +0000
From: CK Hu (胡俊光) <ck.hu@...iatek.com>
To: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
"chunkuang.hu@...nel.org" <chunkuang.hu@...nel.org>
CC: "robh@...nel.org" <robh@...nel.org>, "jie.qiu@...iatek.com"
<jie.qiu@...iatek.com>, "tzimmermann@...e.de" <tzimmermann@...e.de>,
"simona@...ll.ch" <simona@...ll.ch>, "mripard@...nel.org"
<mripard@...nel.org>, Jitao Shi (石记涛)
<jitao.shi@...iatek.com>, "linux-mediatek@...ts.infradead.org"
<linux-mediatek@...ts.infradead.org>, "dri-devel@...ts.freedesktop.org"
<dri-devel@...ts.freedesktop.org>, "maarten.lankhorst@...ux.intel.com"
<maarten.lankhorst@...ux.intel.com>, "linux-kernel@...r.kernel.org"
<linux-kernel@...r.kernel.org>, "devicetree@...r.kernel.org"
<devicetree@...r.kernel.org>, "kernel@...labora.com" <kernel@...labora.com>,
"dmitry.baryshkov@...aro.org" <dmitry.baryshkov@...aro.org>,
"krzk+dt@...nel.org" <krzk+dt@...nel.org>,
Lewis Liao (廖柏鈞) <Lewis.Liao@...iatek.com>,
"p.zabel@...gutronix.de" <p.zabel@...gutronix.de>, "conor+dt@...nel.org"
<conor+dt@...nel.org>, TommyYL Chen (陳彥良)
<TommyYL.Chen@...iatek.com>, Ives Chenjh (陳俊弘)
<Ives.Chenjh@...iatek.com>, "airlied@...il.com" <airlied@...il.com>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>, "matthias.bgg@...il.com"
<matthias.bgg@...il.com>, Jason-JH Lin (林睿祥)
<Jason-JH.Lin@...iatek.com>, "junzhi.zhao@...iatek.com"
<junzhi.zhao@...iatek.com>
Subject: Re: [PATCH v5 21/34] drm/mediatek: mtk_hdmi: Move CEC device parsing
in new function
Hi, Angelo:
On Mon, 2025-01-13 at 15:52 +0100, AngeloGioacchino Del Regno wrote:
> External email : Please do not click links or open attachments until you have verified the sender or the content.
>
>
> Move the CEC device parsing logic to a new function called
> mtk_hdmi_get_cec_dev(), and move the parsing action to the end
> of mtk_hdmi_dt_parse_pdata(), allowing to remove gotos in this
> function, reducing code size and improving readability.
>
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
> ---
> drivers/gpu/drm/mediatek/mtk_hdmi.c | 84 ++++++++++++++---------------
> 1 file changed, 40 insertions(+), 44 deletions(-)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.c b/drivers/gpu/drm/mediatek/mtk_hdmi.c
> index 48c37294dcbb..eb285ec394a3 100644
> --- a/drivers/gpu/drm/mediatek/mtk_hdmi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_hdmi.c
> @@ -1367,24 +1367,16 @@ static const struct drm_bridge_funcs mtk_hdmi_bridge_funcs = {
> .edid_read = mtk_hdmi_bridge_edid_read,
> };
>
> -static int mtk_hdmi_dt_parse_pdata(struct mtk_hdmi *hdmi,
> - struct platform_device *pdev)
> +static int mtk_hdmi_get_cec_dev(struct mtk_hdmi *hdmi, struct device *dev, struct device_node *np)
> {
> - struct device *dev = &pdev->dev;
> - struct device_node *np = dev->of_node;
> - struct device_node *remote, *i2c_np;
> struct platform_device *cec_pdev;
> - struct regmap *regmap;
> + struct device_node *cec_np;
> int ret;
>
> - ret = mtk_hdmi_get_all_clk(hdmi, np);
> - if (ret)
> - return dev_err_probe(dev, ret, "Failed to get clocks\n");
> -
> /* The CEC module handles HDMI hotplug detection */
> cec_np = of_get_compatible_child(np->parent, "mediatek,mt8173-cec");
> if (!cec_np)
> - return dev_err_probe(dev, -EINVAL, "Failed to find CEC node\n");
> + return dev_err_probe(dev, -ENOTSUPP, "Failed to find CEC node\n");
Changing error message should be another patch.
I see another patch has also ENOTSUPP modification.
Maybe both should in the same patch.
>
> cec_pdev = of_find_device_by_node(cec_np);
> if (!cec_pdev) {
> @@ -1393,65 +1385,69 @@ static int mtk_hdmi_dt_parse_pdata(struct mtk_hdmi *hdmi,
> return -EPROBE_DEFER;
> }
> of_node_put(cec_np);
> - hdmi->cec_dev = &cec_pdev->dev;
>
> /*
> * The mediatek,syscon-hdmi property contains a phandle link to the
> * MMSYS_CONFIG device and the register offset of the HDMI_SYS_CFG
> * registers it contains.
> */
> - regmap = syscon_regmap_lookup_by_phandle(np, "mediatek,syscon-hdmi");
> - ret = of_property_read_u32_index(np, "mediatek,syscon-hdmi", 1,
> - &hdmi->sys_offset);
> - if (IS_ERR(regmap))
> - ret = PTR_ERR(regmap);
> - if (ret) {
> - dev_err_probe(dev, ret,
> - "Failed to get system configuration registers\n");
> - goto put_device;
> - }
> - hdmi->sys_regmap = regmap;
> + hdmi->sys_regmap = syscon_regmap_lookup_by_phandle(np, "mediatek,syscon-hdmi");
> + if (IS_ERR(hdmi->sys_regmap))
> + return PTR_ERR(hdmi->sys_regmap);
> +
> + ret = of_property_read_u32_index(np, "mediatek,syscon-hdmi", 1, &hdmi->sys_offset);
> + if (ret)
> + return dev_err_probe(dev, ret,
> + "Failed to get system configuration registers\n");
> +
> + hdmi->cec_dev = &cec_pdev->dev;
> + return 0;
> +}
> +
> +static int mtk_hdmi_dt_parse_pdata(struct mtk_hdmi *hdmi,
> + struct platform_device *pdev)
> +{
> + struct device *dev = &pdev->dev;
> + struct device_node *np = dev->of_node;
> + struct device_node *remote, *i2c_np;
> + int ret;
> +
> + ret = mtk_hdmi_get_all_clk(hdmi, np);
> + if (ret)
> + return dev_err_probe(dev, ret, "Failed to get clocks\n");
>
> hdmi->regs = device_node_to_regmap(dev->of_node);
> - if (IS_ERR(hdmi->regs)) {
> - ret = PTR_ERR(hdmi->regs);
> - goto put_device;
> - }
> + if (IS_ERR(hdmi->regs))
> + return PTR_ERR(hdmi->regs);
>
> remote = of_graph_get_remote_node(np, 1, 0);
> - if (!remote) {
> - ret = -EINVAL;
> - goto put_device;
> - }
> + if (!remote)
> + return -EINVAL;
>
> if (!of_device_is_compatible(remote, "hdmi-connector")) {
> hdmi->next_bridge = of_drm_find_bridge(remote);
> if (!hdmi->next_bridge) {
> dev_err(dev, "Waiting for external bridge\n");
> of_node_put(remote);
> - ret = -EPROBE_DEFER;
> - goto put_device;
> + return -EPROBE_DEFER;
> }
> }
>
> i2c_np = of_parse_phandle(remote, "ddc-i2c-bus", 0);
> of_node_put(remote);
> - if (!i2c_np) {
> - ret = dev_err_probe(dev, -EINVAL, "No ddc-i2c-bus in connector\n");
> - goto put_device;
> - }
> + if (!i2c_np)
> + return dev_err_probe(dev, -EINVAL, "No ddc-i2c-bus in connector\n");
>
> hdmi->ddc_adpt = of_find_i2c_adapter_by_node(i2c_np);
> of_node_put(i2c_np);
> - if (!hdmi->ddc_adpt) {
> - ret = dev_err_probe(dev, -EINVAL, "Failed to get ddc i2c adapter by node\n");
> - goto put_device;
> - }
> + if (!hdmi->ddc_adpt)
> + return dev_err_probe(dev, -EINVAL, "Failed to get ddc i2c adapter by node\n");
> +
> + ret = mtk_hdmi_get_cec_dev(hdmi, dev, np);
> + if (ret)
> + return ret;
>
> return 0;
Maybe
return mtk_hdmi_get_cec_dev(hdmi, dev, np);
Regards,
CK
> -put_device:
> - put_device(hdmi->cec_dev);
> - return ret;
> }
>
> /*
> --
> 2.47.0
>
Powered by blists - more mailing lists