linux-kernel - Re: [PATCH v1 7/7] drm/mediatek: Introduce HDMI/DDC v2 for MT8195/MT8188

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

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <efd20d11b7eb88df78be23d111f08fe79cedc38c.camel@mediatek.com>
Date: Fri, 29 Nov 2024 05:53:44 +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: "linux-mediatek@...ts.infradead.org" <linux-mediatek@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"tzimmermann@...e.de" <tzimmermann@...e.de>, "simona@...ll.ch"
	<simona@...ll.ch>, "mripard@...nel.org" <mripard@...nel.org>,
	"kernel@...labora.com" <kernel@...labora.com>, "p.zabel@...gutronix.de"
	<p.zabel@...gutronix.de>, "maarten.lankhorst@...ux.intel.com"
	<maarten.lankhorst@...ux.intel.com>, "conor+dt@...nel.org"
	<conor+dt@...nel.org>, "robh@...nel.org" <robh@...nel.org>,
	"dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
	"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>, "krzk+dt@...nel.org" <krzk+dt@...nel.org>
Subject: Re: [PATCH v1 7/7] drm/mediatek: Introduce HDMI/DDC v2 for
 MT8195/MT8188

Hi, Angelo:

On Wed, 2024-11-20 at 13:45 +0100, AngeloGioacchino Del Regno wrote:
> External email : Please do not click links or open attachments until you have verified the sender or the content.
> 
> 
> Add support for the newer HDMI-TX (Encoder) v2 and DDC v2 IPs
> found in MediaTek's MT8195, MT8188 SoC and their variants, and
> including support for display modes up to 4k60 and for HDMI
> Audio, as per the HDMI 2.0 spec.
> 
> HDCP and CEC functionalities are also supported by this hardware,
> but are not included in this commit.
> 
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
> ---

[snip]

> +static int mtk_hdmi_v2_probe(struct platform_device *pdev)
> +{
> +       struct mtk_hdmi *hdmi;
> +       int ret;
> +
> +       hdmi = devm_kzalloc(&pdev->dev, sizeof(*hdmi), GFP_KERNEL);

Both v1 and v2 has this allocation, so make it as common code.

Regards,
CK

> +       if (!hdmi)
> +               return -ENOMEM;
> +
> +       ret = mtk_hdmi_common_probe(pdev, hdmi);
> +       if (ret)
> +               return ret;
> +
> +       hdmi->hpd = HDMI_PLUG_OUT;
> +
> +       /*
> +        * Disable all HW interrupts at probe stage and install the ISR
> +        * but keep it disabled, as the rest of the interrupts setup is
> +        * done in the .bridge_attach() callback, which will enable both
> +        * the right HW IRQs and the ISR.
> +        */
> +       mtk_hdmi_hwirq_disable(hdmi);
> +       irq_set_status_flags(hdmi->irq, IRQ_NOAUTOEN);
> +       ret = devm_request_threaded_irq(&pdev->dev, hdmi->irq, mtk_hdmi_v2_isr,
> +                                       mtk_hdmi_v2_isr_thread,
> +                                       IRQ_TYPE_LEVEL_HIGH,
> +                                       dev_name(&pdev->dev), hdmi);
> +       if (ret)
> +               return dev_err_probe(&pdev->dev, ret, "Cannot request IRQ\n");
> +
> +       ret = devm_pm_runtime_enable(&pdev->dev);
> +       if (ret)
> +               return dev_err_probe(&pdev->dev, ret, "Cannot enable Runtime PM\n");
> +
> +       return 0;
> +}
> +

>