Re: [PATCH v4 7/9] media: aspeed: Support aspeed mode to reduce compressed data

[Jammy Huang <jammy_huang@xxxxxxxxxxxxxx>]

Hi Sakari,

OK, I will add a patch which uses data in device table to tell the 
differences between
SoC to the series. Thanks for your advice.

On 2021/11/15 下午 04:19, Sakari Ailus wrote:
> Hi Jammy,
>
> Thanks for the patch. A few comments below...
>
> On Mon, Nov 15, 2021 at 03:44:35PM +0800, Jammy Huang wrote:
> > @@ -969,35 +1045,70 @@ static void aspeed_video_set_resolution(struct aspeed_video *video)
> >   
> >   static void aspeed_video_update_regs(struct aspeed_video *video)
> >   {
> > -	u32 comp_ctrl = VE_COMP_CTRL_RSVD |
> > -		FIELD_PREP(VE_COMP_CTRL_DCT_LUM, video->jpeg_quality) |
> > -		FIELD_PREP(VE_COMP_CTRL_DCT_CHR, video->jpeg_quality | 0x10);
> > +	u8 jpeg_hq_quality = clamp((int)video->jpeg_hq_quality - 1, 0,
> > +				   ASPEED_VIDEO_JPEG_NUM_QUALITIES - 1);
> > +	u32 comp_ctrl =	FIELD_PREP(VE_COMP_CTRL_DCT_LUM, video->jpeg_quality) |
> > +		FIELD_PREP(VE_COMP_CTRL_DCT_CHR, video->jpeg_quality | 0x10) |
> > +		FIELD_PREP(VE_COMP_CTRL_EN_HQ, video->hq_mode) |
> > +		FIELD_PREP(VE_COMP_CTRL_HQ_DCT_LUM, jpeg_hq_quality) |
> > +		FIELD_PREP(VE_COMP_CTRL_HQ_DCT_CHR, jpeg_hq_quality |
> > +			   0x10);
> >   	u32 ctrl = 0;
> > -	u32 seq_ctrl = VE_SEQ_CTRL_JPEG_MODE;
> > +	u32 seq_ctrl = 0;
> >   
> > -	v4l2_dbg(1, debug, &video->v4l2_dev, "framerate(%d)\n",
> > -		 video->frame_rate);
> > -	v4l2_dbg(1, debug, &video->v4l2_dev, "subsample(%s)\n",
> > +	v4l2_dbg(1, debug, &video->v4l2_dev, "framerate(%d)\n", video->frame_rate);
> > +	v4l2_dbg(1, debug, &video->v4l2_dev, "jpeg format(%s) subsample(%s)\n",
> > +		 format_str[video->format],
> >   		 video->yuv420 ? "420" : "444");
> > -	v4l2_dbg(1, debug, &video->v4l2_dev, "compression quality(%d)\n",
> > -		 video->jpeg_quality);
> > +	v4l2_dbg(1, debug, &video->v4l2_dev, "compression quality(%d) hq(%s) hq_quality(%d)\n",
> > +		 video->jpeg_quality, video->hq_mode ? "on" : "off",
> > +		 video->jpeg_hq_quality);
> > +	v4l2_dbg(1, debug, &video->v4l2_dev, "compression mode(%s)\n",
> > +		 compress_mode_str[video->compression_mode]);
> > +
> > +	if (video->format == VIDEO_FMT_ASPEED)
> > +		aspeed_video_update(video, VE_BCD_CTRL, 0, VE_BCD_CTRL_EN_BCD);
> > +	else
> > +		aspeed_video_update(video, VE_BCD_CTRL, VE_BCD_CTRL_EN_BCD, 0);
> >   
> >   	if (video->frame_rate)
> >   		ctrl |= FIELD_PREP(VE_CTRL_FRC, video->frame_rate);
> >   
> > +	if (video->format == VIDEO_FMT_STANDARD) {
> > +		comp_ctrl &= ~FIELD_PREP(VE_COMP_CTRL_EN_HQ, video->hq_mode);
> > +		seq_ctrl |= VE_SEQ_CTRL_JPEG_MODE;
> > +	}
> > +
> >   	if (video->yuv420)
> >   		seq_ctrl |= VE_SEQ_CTRL_YUV420;
> >   
> >   	if (video->jpeg.virt)
> >   		aspeed_video_update_jpeg_table(video->jpeg.virt, video->yuv420);
> >   
> > +#ifdef CONFIG_MACH_ASPEED_G4
> This would be better done based on the device recognised, not the selected
> compile target. The same goes for the rest of the conditional pre-processor
> bits.
>
> > +	switch (video->compression_mode) {
> > +	case 0:	//DCT only
> > +		comp_ctrl |= VE_COMP_CTRL_VQ_DCT_ONLY;
> > +		break;
> > +	case 1:	//DCT VQ mix 2-color
> > +		comp_ctrl &= ~(VE_COMP_CTRL_VQ_4COLOR | VE_COMP_CTRL_VQ_DCT_ONLY);
> > +		break;
> > +	case 2:	//DCT VQ mix 4-color
> > +		comp_ctrl |= VE_COMP_CTRL_VQ_4COLOR;
> > +		break;
> > +	}
> > +#endif
> > +

--
Best Regards
Jammy