| 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
| ||
|
Date: Thu, 8 Jul 2021 18:04:46 +0800
From: Tzung-Bi Shih <tzungbi@...gle.com>
To: Yunfei Dong <Yunfei.Dong@...iatek.com>
Cc: Alexandre Courbot <acourbot@...omium.org>,
Hans Verkuil <hverkuil-cisco@...all.nl>,
Tzung-Bi Shih <tzungbi@...omium.org>,
Tiffany Lin <tiffany.lin@...iatek.com>,
Andrew-CT Chen <andrew-ct.chen@...iatek.com>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
Rob Herring <robh+dt@...nel.org>,
Matthias Brugger <matthias.bgg@...il.com>,
Tomasz Figa <tfiga@...gle.com>,
Hsin-Yi Wang <hsinyi@...omium.org>,
Fritz Koenig <frkoenig@...omium.org>,
Irui Wang <irui.wang@...iatek.com>,
linux-media@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
srv_heupstream@...iatek.com, linux-mediatek@...ts.infradead.org,
Project_Global_Chrome_Upstream_Group@...iatek.com
Subject: Re: [PATCH v1, 03/14] media: mtk-vcodec: Use component framework to
manage each hardware information
On Wed, Jul 7, 2021 at 2:22 PM Yunfei Dong <yunfei.dong@...iatek.com> wrote:
> +#include "mtk_vcodec_util.h"
> +
> #include <media/videobuf2-core.h>
> +#include <media/v4l2-ctrls.h>
> #include <media/v4l2-mem2mem.h>
The changes look like independent ones. If any .c files need the
headers, include them in the .c files instead of here.
> + comp_node = of_find_compatible_node(NULL, NULL,
> + mtk_vdec_drv_ids[i].compatible);
> + if (!comp_node)
> + continue;
> +
> + if (!of_device_is_available(comp_node)) {
> + of_node_put(comp_node);
> + dev_err(&pdev->dev, "Fail to get MMSYS node\n");
> + continue;
> + }
> +
> + of_id = of_match_node(mtk_vdec_drv_ids, comp_node);
> + if (!of_id) {
Doesn't it need to call of_node_put(comp_node)?
> +static int mtk_vcodec_init_master(struct mtk_vcodec_dev *dev)
> +{
> + struct platform_device *pdev = dev->plat_dev;
> + struct component_match *match;
> + int ret = 0;
ret doesn't need to be initialized.
> + match = mtk_vcodec_match_add(dev);
> + if (IS_ERR_OR_NULL(match))
> + return -EINVAL;
> +
> + platform_set_drvdata(pdev, dev);
Why does platform_set_drvdata() need to be here? The function neither
creates pdev nor dev.
> +static int mtk_vcodec_init_dec_params(struct mtk_vcodec_dev *dev)
> +{
> + struct platform_device *pdev = dev->plat_dev;
> + struct resource *res;
> + int ret = 0;
ret doesn't need to be initialized.
> + if (!dev->is_support_comp) {
> + res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
> + if (res == NULL) {
!res, res is not used BTW.
> + dev->dec_irq = platform_get_irq(dev->plat_dev, 0);
Check return value.
> + irq_set_status_flags(dev->dec_irq, IRQ_NOAUTOEN);
> + ret = devm_request_irq(&pdev->dev, dev->dec_irq,
> + mtk_vcodec_dec_irq_handler, 0, pdev->name, dev);
> + if (ret) {
> + dev_err(&pdev->dev, "failed to install dev->dec_irq %d (%d)",
> + dev->dec_irq,
> + ret);
Can join to previous line.
> + if (!of_find_compatible_node(NULL, NULL, "mediatek,mtk-vcodec-core"))
> + dev->is_support_comp = false;
> + else
> + dev->is_support_comp = true;
Need a DT binding document patch for the attribute.
Does it really need to call of_find_compatible_node() for parsing an
attribute? If so, it needs to call of_node_put() afterward.
> @@ -319,7 +434,6 @@ static int mtk_vcodec_probe(struct platform_device *pdev)
> MTK_VCODEC_DEC_NAME);
> video_set_drvdata(vfd_dec, dev);
> dev->vfd_dec = vfd_dec;
> - platform_set_drvdata(pdev, dev);
Why does it need to remove platform_set_drvdata()?
> @@ -370,8 +484,17 @@ static int mtk_vcodec_probe(struct platform_device *pdev)
> mtk_v4l2_debug(0, "decoder registered as /dev/video%d",
> vfd_dec->num);
>
> - return 0;
> + if (dev->is_support_comp) {
> + ret = mtk_vcodec_init_master(dev);
> + if (ret < 0)
> + goto err_component_match;
> + } else {
> + platform_set_drvdata(pdev, dev);
> + }
mtk_vcodec_init_master() also calls platform_set_drvdata(). What is
the difference?
> + /* clear interrupt */
> + writel((readl(vdec_misc_addr) | VDEC_IRQ_CFG), vdec_misc_addr);
> + writel((readl(vdec_misc_addr) & ~VDEC_IRQ_CLR), vdec_misc_addr);
Can remove 1 parenthese pair.
> +static int mtk_vdec_comp_probe(struct platform_device *pdev)
> +{
> + struct mtk_vdec_comp_dev *dev;
> + int ret;
> +
> + dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
> + if (!dev)
> + return -ENOMEM;
> +
> + dev->plat_dev = pdev;
> + spin_lock_init(&dev->irqlock);
> +
> + ret = mtk_vcodec_init_dec_pm(dev->plat_dev, &dev->pm);
To be concise, use pdev.
> + dev->reg_base[VDEC_COMP_MISC] =
> + devm_platform_ioremap_resource(pdev, 0);
Confusing about the index 0, where:
VDEC_COMP_SYS = 0
VDEC_COMP_MISC = 1
> +#ifndef _MTK_VCODEC_DEC_HW_H_
> +#define _MTK_VCODEC_DEC_HW_H_
> +
> +#include <linux/component.h>
Does it really need to include component.h?
> +/**
> + * enum mtk_comp_hw_reg_idx - component register base index
> + */
> +enum mtk_comp_hw_reg_idx {
> + VDEC_COMP_SYS,
> + VDEC_COMP_MISC,
> + NUM_MAX_COMP_VCODEC_REG_BASE
The name is suboptimal. How about VDEC_COMP_MAX or VDEC_COMP_LAST?
> +#include <linux/component.h>
> +#include <linux/io.h>
> #include <linux/platform_device.h>
> #include <linux/videodev2.h>
> #include <media/v4l2-ctrls.h>
The newly added code in the file doesn't look like it needs anything
from component.h and io.h.
> @@ -404,6 +422,7 @@ struct mtk_vcodec_enc_pdata {
> *
> * @fw_handler: used to communicate with the firmware.
> * @id_counter: used to identify current opened instance
> + * @is_support_comp: 1: using compoent framework, 0: not support
is_support_comp is a boolean. Use true and false instead of 1 and 0.
> @@ -422,6 +441,10 @@ struct mtk_vcodec_enc_pdata {
> * @pm: power management control
> * @dec_capability: used to identify decode capability, ex: 4k
> * @enc_capability: used to identify encode capability
> + *
> + * comp_dev: component hardware device
> + * component_node: component node
> + * comp_idx: component index
To be neat, missing "@" before each symbol name.
Powered by blists - more mailing lists