Re: [PATCH 1/7] media: mediatek: vcodec: Getting the chip name of each platform

[Yunfei Dong (董云飞)]

Hi Sebastian,

Thanks for your advice.

Send the patch v2 to fix the below items:

Fix the commit message for some patches.
Fix the level of mt8195 and mt8192.

Best Regards,
Yunfei Dong
On Sat, 2023-10-21 at 10:30 +0200, Sebastian Fricke wrote:
> Hey Yunfei,
> 
> Thanks for your patches!
> 
> Could you provide a cover-letter for the next version please?
> This will help to get a good context of why we need these changes and
> to
> store the changelog in a helpful manner.
> Thanks.
> 
> On 16.10.2023 14:43, Yunfei Dong wrote:
> > Getting the chip name of each platform according to the device
> > compatible to set different parameter.
> 
> I would reword this commit description slightly, basically what you
> change is that you store the chip name in context permanently and
> that
> you utilize a enum to be more descriptive.
> 
> So how about:
> 
> """
> Store the name of the chip in the context of the driver in order to
> be
> able to choose the correct configuration values for the different
> codecs.
> Use a enum value instead of an integer to store a more descriptive
> name.
> """
> 
> A few more comments below.
> 
> > 
> > Signed-off-by: Yunfei Dong <yunfei.dong@xxxxxxxxxxxx>
> > ---
> > .../mediatek/vcodec/decoder/mtk_vcodec_dec.c  | 24 +---------------
> > -
> > .../vcodec/decoder/mtk_vcodec_dec_drv.c       | 26
> > +++++++++++++++++++
> > .../vcodec/decoder/mtk_vcodec_dec_drv.h       | 17 ++++++++++++
> > 3 files changed, 44 insertions(+), 23 deletions(-)
> > 
> > diff --git
> > a/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec.c
> > b/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec.c
> > index 91ed576d6821..ba742f0e391d 100644
> > ---
> > a/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec.c
> > +++
> > b/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec.c
> > @@ -208,36 +208,14 @@ static int vidioc_vdec_dqbuf(struct file
> > *file, void *priv,
> > 	return v4l2_m2m_dqbuf(file, ctx->m2m_ctx, buf);
> > }
> > 
> > -static int mtk_vcodec_dec_get_chip_name(void *priv)
> > -{
> > -	struct mtk_vcodec_dec_ctx *ctx = fh_to_dec_ctx(priv);
> > -	struct device *dev = &ctx->dev->plat_dev->dev;
> > -
> > -	if (of_device_is_compatible(dev->of_node, "mediatek,mt8173-
> > vcodec-dec"))
> > -		return 8173;
> > -	else if (of_device_is_compatible(dev->of_node,
> > "mediatek,mt8183-vcodec-dec"))
> > -		return 8183;
> > -	else if (of_device_is_compatible(dev->of_node,
> > "mediatek,mt8192-vcodec-dec"))
> > -		return 8192;
> > -	else if (of_device_is_compatible(dev->of_node,
> > "mediatek,mt8195-vcodec-dec"))
> > -		return 8195;
> > -	else if (of_device_is_compatible(dev->of_node,
> > "mediatek,mt8186-vcodec-dec"))
> > -		return 8186;
> > -	else if (of_device_is_compatible(dev->of_node,
> > "mediatek,mt8188-vcodec-dec"))
> > -		return 8188;
> > -	else
> > -		return 8173;
> > -}
> > -
> > static int vidioc_vdec_querycap(struct file *file, void *priv,
> > 				struct v4l2_capability *cap)
> > {
> > 	struct mtk_vcodec_dec_ctx *ctx = fh_to_dec_ctx(priv);
> > 	struct device *dev = &ctx->dev->plat_dev->dev;
> > -	int platform_name = mtk_vcodec_dec_get_chip_name(priv);
> > 
> > 	strscpy(cap->driver, dev->driver->name, sizeof(cap->driver));
> > -	snprintf(cap->card, sizeof(cap->card), "MT%d video decoder",
> > platform_name);
> > +	snprintf(cap->card, sizeof(cap->card), "MT%d video decoder",
> > ctx->dev->chip_name);
> > 
> > 	return 0;
> > }
> > diff --git
> > a/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv
> > .c
> > b/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv
> > .c
> > index 0a89ce452ac3..f47c98faf068 100644
> > ---
> > a/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv
> > .c
> > +++
> > b/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv
> > .c
> > @@ -326,6 +326,26 @@ static const struct v4l2_file_operations
> > mtk_vcodec_fops = {
> > 	.mmap		= v4l2_m2m_fop_mmap,
> > };
> > 
> > +static void mtk_vcodec_dec_get_chip_name(struct mtk_vcodec_dec_dev
> > *vdec_dev)
> > +{
> > +	struct device *dev = &vdec_dev->plat_dev->dev;
> > +
> > +	if (of_device_is_compatible(dev->of_node, "mediatek,mt8173-
> > vcodec-dec"))
> > +		vdec_dev->chip_name = MTK_VDEC_MT8173;
> > +	else if (of_device_is_compatible(dev->of_node,
> > "mediatek,mt8183-vcodec-dec"))
> > +		vdec_dev->chip_name = MTK_VDEC_MT8183;
> > +	else if (of_device_is_compatible(dev->of_node,
> > "mediatek,mt8192-vcodec-dec"))
> > +		vdec_dev->chip_name = MTK_VDEC_MT8192;
> > +	else if (of_device_is_compatible(dev->of_node,
> > "mediatek,mt8195-vcodec-dec"))
> > +		vdec_dev->chip_name = MTK_VDEC_MT8195;
> > +	else if (of_device_is_compatible(dev->of_node,
> > "mediatek,mt8186-vcodec-dec"))
> > +		vdec_dev->chip_name = MTK_VDEC_MT8186;
> > +	else if (of_device_is_compatible(dev->of_node,
> > "mediatek,mt8188-vcodec-dec"))
> > +		vdec_dev->chip_name = MTK_VDEC_MT8188;
> > +	else
> > +		vdec_dev->chip_name = MTK_VDEC_INVAL;
> > +}
> > +
> > static int mtk_vcodec_probe(struct platform_device *pdev)
> > {
> > 	struct mtk_vcodec_dec_dev *dev;
> > @@ -341,6 +361,12 @@ static int mtk_vcodec_probe(struct
> > platform_device *pdev)
> > 	INIT_LIST_HEAD(&dev->ctx_list);
> > 	dev->plat_dev = pdev;
> > 
> > +	mtk_vcodec_dec_get_chip_name(dev);
> > +	if (dev->chip_name == MTK_VDEC_INVAL) {
> > +		dev_err(&pdev->dev, "Failed to get decoder chip name");
> > +		return -EINVAL;
> > +	}
> > +
> > 	dev->vdec_pdata = of_device_get_match_data(&pdev->dev);
> > 	if (!of_property_read_u32(pdev->dev.of_node, "mediatek,vpu",
> > 				  &rproc_phandle)) {
> > diff --git
> > a/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv
> > .h
> > b/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv
> > .h
> > index 7e36b2c69b7d..8f228ba9aa47 100644
> > ---
> > a/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv
> > .h
> > +++
> > b/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_drv
> > .h
> > @@ -18,6 +18,19 @@
> > #define IS_VDEC_LAT_ARCH(hw_arch) ((hw_arch) >=
> > MTK_VDEC_LAT_SINGLE_CORE)
> > #define IS_VDEC_INNER_RACING(capability) ((capability) &
> > MTK_VCODEC_INNER_RACING)
> > 
> > +/*
> > + * enum mtk_vcodec_dec_chip_name - Structure used to separate
> > different platform
> > + */
> 
> I don't feel like this comment is terribly helpful because it is
> pretty
> clear what the enum is about, I would just drop it.
> 
> > +enum mtk_vcodec_dec_chip_name {
> > +	MTK_VDEC_INVAL = 0,
> > +	MTK_VDEC_MT8173 = 8173,
> > +	MTK_VDEC_MT8183 = 8183,
> > +	MTK_VDEC_MT8186 = 8186,
> > +	MTK_VDEC_MT8188 = 8188,
> > +	MTK_VDEC_MT8192 = 8192,
> > +	MTK_VDEC_MT8195 = 8195,
> > +};
> > +
> > /*
> >  * enum mtk_vdec_format_types - Structure used to get supported
> >  *		  format types according to decoder capability
> > @@ -249,6 +262,8 @@ struct mtk_vcodec_dec_ctx {
> >  * @vdec_racing_info: record register value
> >  * @dec_racing_info_mutex: mutex lock used for inner racing mode
> >  * @dbgfs: debug log related information
> > + *
> > + * @chip_name: the chip name used to separate different platform
> 
> I wouldn't repeat chip name in the description and specify more
> concretely why we need to separate the platforms.
> 
> My suggestion:
> 
>   * @chip_name: used to distinguish platforms and select the correct
> codec configuration values.
> 
> >  */
> > struct mtk_vcodec_dec_dev {
> > 	struct v4l2_device v4l2_dev;
> > @@ -289,6 +304,8 @@ struct mtk_vcodec_dec_dev {
> > 	/* Protects access to vdec_racing_info data */
> > 	struct mutex dec_racing_info_mutex;
> > 	struct mtk_vcodec_dbgfs dbgfs;
> > +
> > +	enum mtk_vcodec_dec_chip_name chip_name;
> > };
> > 
> > static inline struct mtk_vcodec_dec_ctx *fh_to_dec_ctx(struct
> > v4l2_fh *fh)
> 
> Besides those small wording choices, the patch looks good.
> 
> So with these issues resolved:
> 
> Reviewed-by: Sebastian Fricke <sebastian.fricke@xxxxxxxxxxxxx>
> 
> Regards,
> Sebastian
> > -- 
> > 2.18.0
> >