Re: [PATCH v1 4/6] soc: mediatek: mmsys: add config api for RSZ switching and DCM

[moudy ho <moudy.ho@mediatek.com>]

On Tue, 2022-10-04 at 14:17 +0200, AngeloGioacchino Del Regno wrote:
> Il 04/10/22 11:33, Moudy Ho ha scritto:
> > From: "Roy-CW.Yeh" <roy-cw.yeh@mediatek.com>
> > 
> > Due to MT8195 HW design, some RSZs have additional settings that
> > need to be configured in MMSYS.
> > 
> > Signed-off-by: Roy-CW.Yeh <roy-cw.yeh@mediatek.com>
> 
> Hello Moudy,
> 
> please remember that you have to add your Signed-off-by tag to all of
> the commits
> that you're sending, even if you're not the author, otherwise they
> are not
> acceptable.
> 

Hi Angelo,

Thanks for the reminder, I'll add the required tags and resend the
entire patch.

Regards,
Moudy
> > ---
> >   drivers/soc/mediatek/mt8195-mmsys.h    |  8 ++++++
> >   drivers/soc/mediatek/mtk-mmsys.c       | 40
> > ++++++++++++++++++++++++++
> >   include/linux/soc/mediatek/mtk-mmsys.h |  4 +++
> >   3 files changed, 52 insertions(+)
> > 
> > diff --git a/drivers/soc/mediatek/mt8195-mmsys.h
> > b/drivers/soc/mediatek/mt8195-mmsys.h
> > index abfe94a30248..e0cf13d09763 100644
> > --- a/drivers/soc/mediatek/mt8195-mmsys.h
> > +++ b/drivers/soc/mediatek/mt8195-mmsys.h
> > @@ -75,6 +75,14 @@
> >   #define MT8195_SOUT_DSC_WRAP1_OUT_TO_SINA_VIRTUAL0		
> > (2 << 16)
> >   #define MT8195_SOUT_DSC_WRAP1_OUT_TO_VPP_MERGE			
> > (3 << 16)
> >   
> > +/* VPPSYS1 */
> > +#define MT8195_SVPP1_HW_DCM_1ST_DIS0				
> > 0x150
> > +#define MT8195_SVPP1_HW_DCM_1ST_DIS1				
> > 0x160
> > +#define MT8195_SVPP1_HW_DCM_2ND_DIS0				
> > 0x1a0
> > +#define MT8195_SVPP1_HW_DCM_2ND_DIS1				
> > 0x1b0
> > +#define MT8195_SVPP2_BUF_BF_RSZ_SWITCH				
> > 0xf48
> > +#define MT8195_SVPP3_BUF_BF_RSZ_SWITCH				
> > 0xf74
> > +
> >   static const struct mtk_mmsys_routes mmsys_mt8195_routing_table[]
> > = {
> >   	{
> >   		DDP_COMPONENT_OVL0, DDP_COMPONENT_RDMA0,
> > diff --git a/drivers/soc/mediatek/mtk-mmsys.c
> > b/drivers/soc/mediatek/mtk-mmsys.c
> > index c4d15f99f853..c98cfcb7db38 100644
> > --- a/drivers/soc/mediatek/mtk-mmsys.c
> > +++ b/drivers/soc/mediatek/mtk-mmsys.c
> > @@ -261,6 +261,46 @@ void mtk_mmsys_ddp_dpi_fmt_config(struct
> > device *dev, u32 val)
> >   }
> >   EXPORT_SYMBOL_GPL(mtk_mmsys_ddp_dpi_fmt_config);
> >   
> > +void mtk_mmsys_merge_config(struct device *dev, u32 id, bool
> > enable)
> 
> void mtk_mmsys_merge_config(struct device *dev, u32 svpp_id, bool
> enable)
> 
> or
> 
> void mtk_mmsys_vpp_merge_config(struct device *dev, u32 id, bool
> enable)
> 
> ...adding that "svpp" or "vpp" word makes the function easier to
> understand :-)
> 
> > +{
> > +	u32 reg;
> > +
> > +	switch (id) {
> > +	case 2:
> > +		reg = MT8195_SVPP2_BUF_BF_RSZ_SWITCH;
> > +		break;
> > +	case 3:
> > +		reg = MT8195_SVPP3_BUF_BF_RSZ_SWITCH;
> > +		break;
> > +	default:
> > +		dev_err(dev, "Invalid id %d\n", id);
> > +		return;
> > +	}
> > +
> > +	mtk_mmsys_update_bits(dev_get_drvdata(dev), reg, ~0, enable);
> > +}
> > +EXPORT_SYMBOL_GPL(mtk_mmsys_merge_config);
> > +
> > +void mtk_mmsys_rsz_dcm_config(struct device *dev, bool enable)
> 
> ...would be the same here, but only about the function name, so I'd
> go with
> changing the name for both.
> 
> > +{
> > +	u32 val = 0;
> > +
> > +	if (enable)
> > +		val = BIT(25);
> 
> No magic bits please, add a definition for them
> 
> > +	mtk_mmsys_update_bits(dev_get_drvdata(dev),
> > +			      MT8195_SVPP1_HW_DCM_1ST_DIS0, BIT(25),
> > val);
> > +	mtk_mmsys_update_bits(dev_get_drvdata(dev),
> > +			      MT8195_SVPP1_HW_DCM_2ND_DIS0, BIT(25),
> > val);
> > +
> > +	if (enable)
> > +		val = (BIT(4) | BIT(5));
> 
> same here
> 
> > +	mtk_mmsys_update_bits(dev_get_drvdata(dev),
> > +			      MT8195_SVPP1_HW_DCM_1ST_DIS1, (BIT(4) |
> > BIT(5)), val);
> > +	mtk_mmsys_update_bits(dev_get_drvdata(dev),
> > +			      MT8195_SVPP1_HW_DCM_2ND_DIS1, (BIT(4) |
> > BIT(5)), val);
> > +}
> > +EXPORT_SYMBOL_GPL(mtk_mmsys_rsz_dcm_config);
> > +
> >   static int mtk_mmsys_reset_update(struct reset_controller_dev
> > *rcdev, unsigned long id,
> >   				  bool assert)
> >   {
> > diff --git a/include/linux/soc/mediatek/mtk-mmsys.h
> > b/include/linux/soc/mediatek/mtk-mmsys.h
> > index d2b02bb43768..2d5c7fe920b0 100644
> > --- a/include/linux/soc/mediatek/mtk-mmsys.h
> > +++ b/include/linux/soc/mediatek/mtk-mmsys.h
> > @@ -67,4 +67,8 @@ void mtk_mmsys_ddp_disconnect(struct device *dev,
> >   
> >   void mtk_mmsys_ddp_dpi_fmt_config(struct device *dev, u32 val);
> >   
> > +void mtk_mmsys_merge_config(struct device *dev, u32 id, bool
> > enable);
> > +
> > +void mtk_mmsys_rsz_dcm_config(struct device *dev, bool enable);
> > +
> >   #endif /* __MTK_MMSYS_H */
> 
>