linux-kernel - Re: [PATCH v3 07/13] drm/mediatek: add YUYV/UYVY color format support for RDMA

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Date:   Tue, 7 Aug 2018 17:49:02 +0800
From:   Stu Hsieh <stu.hsieh@...iatek.com>
To:     CK Hu <ck.hu@...iatek.com>
CC:     Philipp Zabel <p.zabel@...gutronix.de>,
        David Airlie <airlied@...ux.ie>,
        Matthias Brugger <matthias.bgg@...il.com>,
        <dri-devel@...ts.freedesktop.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <srv_heupstream@...iatek.com>
Subject: Re: [PATCH v3 07/13] drm/mediatek: add YUYV/UYVY color format
 support for RDMA

Hi, CK:

On Tue, 2018-08-07 at 11:33 +0800, CK Hu wrote:
> Hi, Stu:
> 
> On Mon, 2018-08-06 at 19:58 +0800, Stu Hsieh wrote:
> > This patch add YUYV/UYVY color format support for RDMA
> > and transform matrix for YUYV/UYVY.
> > 
> > Signed-off-by: Stu Hsieh <stu.hsieh@...iatek.com>
> > ---
> >  drivers/gpu/drm/mediatek/mtk_disp_rdma.c | 15 +++++++++++++++
> >  1 file changed, 15 insertions(+)
> > 
> > diff --git a/drivers/gpu/drm/mediatek/mtk_disp_rdma.c b/drivers/gpu/drm/mediatek/mtk_disp_rdma.c
> > index ba72d392dc27..91a8b6e27d39 100644
> > --- a/drivers/gpu/drm/mediatek/mtk_disp_rdma.c
> > +++ b/drivers/gpu/drm/mediatek/mtk_disp_rdma.c
> > @@ -33,6 +33,8 @@
> >  #define RDMA_ENGINE_EN					BIT(0)
> >  #define RDMA_MODE_MEMORY				BIT(1)
> >  #define DISP_REG_RDMA_SIZE_CON_0		0x0014
> > +#define RDMA_MATRIX_ENABLE				BIT(17)
> > +#define RDMA_MATRIX_INT_MTX_SEL				(7UL << 20)
> >  #define DISP_REG_RDMA_SIZE_CON_1		0x0018
> >  #define DISP_REG_RDMA_TARGET_LINE		0x001c
> >  #define DISP_RDMA_MEM_CON			0x0024
> > @@ -46,12 +48,15 @@
> >  #define RDMA_FIFO_SIZE(rdma)			((rdma)->data->fifo_size)
> >  #define DISP_RDMA_MEM_START_ADDR		0x0f00
> >  
> > +#define MATRIX_INT_MTX_SEL_DEFAULT		0xb00000
> >  #define RDMA_MEM_GMC				0x40402020
> >  
> >  #define MEM_MODE_INPUT_FORMAT_RGB565		0x0
> >  #define MEM_MODE_INPUT_FORMAT_RGB888		(0x001 << 4)
> >  #define MEM_MODE_INPUT_FORMAT_RGBA8888		(0x002 << 4)
> >  #define MEM_MODE_INPUT_FORMAT_ARGB8888		(0x003 << 4)
> > +#define MEM_MODE_INPUT_FORMAT_UYVY		(0x004 << 4)
> > +#define MEM_MODE_INPUT_FORMAT_YUYV		(0x005 << 4)
> >  
> >  struct mtk_disp_rdma_data {
> >  	unsigned int fifo_size;
> > @@ -176,6 +181,10 @@ static unsigned int rdma_fmt_convert(struct mtk_disp_rdma *rdma,
> >  	case DRM_FORMAT_XBGR8888:
> >  	case DRM_FORMAT_ABGR8888:
> >  		return MEM_MODE_INPUT_FORMAT_RGBA8888 | MEM_MODE_INPUT_SWAP;
> > +	case DRM_FORMAT_UYVY:
> > +		return MEM_MODE_INPUT_FORMAT_UYVY;
> > +	case DRM_FORMAT_YUYV:
> > +		return MEM_MODE_INPUT_FORMAT_YUYV;
> >  	}
> >  }
> >  
> > @@ -191,6 +200,12 @@ static void mtk_rdma_layer_config(struct mtk_ddp_comp *comp, unsigned int idx,
> >  
> >  	con = rdma_fmt_convert(rdma, fmt);
> >  	writel_relaxed(con, comp->regs + DISP_RDMA_MEM_CON);
> > +	if (fmt == DRM_FORMAT_UYVY || fmt == DRM_FORMAT_YUYV)
> > +		rdma_update_bits(comp, DISP_REG_RDMA_SIZE_CON_0, 0xff0000,
> 
> Symbolize 0xff0000. Maybe you should define as
> 
> #define RDMA_MATRIX_INT_MTX_SEL GENMASK(23, 20)
> #define RDMA_MATRIX_INT_MTX_YUV_TO_RGB   0x7
> #define RDMA_MATRIX_INT_MTX_RGB_TO_RGB   0xb
> 
> Correct the naming to align data sheet.
> 
> Regards,
> CK
> 
OK

Regards,
Stu

> > +				 RDMA_MATRIX_ENABLE | RDMA_MATRIX_INT_MTX_SEL);
> > +	else
> > +		rdma_update_bits(comp, DISP_REG_RDMA_SIZE_CON_0, 0xff0000,
> > +				 MATRIX_INT_MTX_SEL_DEFAULT);
> >  
> >  	writel_relaxed(addr, comp->regs + DISP_RDMA_MEM_START_ADDR);
> >  	writel_relaxed(pitch, comp->regs + DISP_RDMA_MEM_SRC_PITCH);
> 
>