linux-kernel - Re: [PATCH v5 03/10] media: aspeed: add more debug log messages

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Message-ID: <YZY/sfRs+/bH3Was@paasikivi.fi.intel.com>
Date:   Thu, 18 Nov 2021 13:57:37 +0200
From:   Sakari Ailus <sakari.ailus@...ux.intel.com>
To:     Jammy Huang <jammy_huang@...eedtech.com>
Cc:     eajames@...ux.ibm.com, mchehab@...nel.org, joel@....id.au,
        andrew@...id.au, hverkuil-cisco@...all.nl,
        gregkh@...uxfoundation.org, laurent.pinchart@...asonboard.com,
        linux-media@...r.kernel.org, openbmc@...ts.ozlabs.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-aspeed@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 03/10] media: aspeed: add more debug log messages

Hi Jammy,

On Thu, Nov 18, 2021 at 03:40:24PM +0800, Jammy Huang wrote:
> The new messages are listed as below:
> 1. jpeg header and capture buffer information
> 2. information for each irq
> 3. current capture mode, sync or direct-fetch
> 4. time consumed for each frame
> 5. input timing changed information
> 
> Signed-off-by: Jammy Huang <jammy_huang@...eedtech.com>
> ---
> v5:
>   - no update
> v4:
>   - modify log level
> v3:
>   - update commit message
> v2:
>   - new
> ---
>  drivers/media/platform/aspeed-video.c | 24 ++++++++++++++++++++++++
>  1 file changed, 24 insertions(+)
> 
> diff --git a/drivers/media/platform/aspeed-video.c b/drivers/media/platform/aspeed-video.c
> index 6af57467b6d4..e8dd0a7ebfc7 100644
> --- a/drivers/media/platform/aspeed-video.c
> +++ b/drivers/media/platform/aspeed-video.c
> @@ -461,12 +461,17 @@ static void aspeed_video_write(struct aspeed_video *video, u32 reg, u32 val)
>  
>  static void update_perf(struct aspeed_video_perf *p)
>  {
> +	struct aspeed_video *v = container_of(p, struct aspeed_video,
> +					      perf);
> +
>  	p->duration =
>  		ktime_to_ms(ktime_sub(ktime_get(),  p->last_sample));
>  	p->totaltime += p->duration;
>  
>  	p->duration_max = max(p->duration, p->duration_max);
>  	p->duration_min = min(p->duration, p->duration_min);
> +	v4l2_dbg(2, debug, &v->v4l2_dev, "time consumed: %d ms\n",
> +		 p->duration);
>  }
>  
>  static int aspeed_video_start_frame(struct aspeed_video *video)
> @@ -597,6 +602,12 @@ static irqreturn_t aspeed_video_irq(int irq, void *arg)
>  	struct aspeed_video *video = arg;
>  	u32 sts = aspeed_video_read(video, VE_INTERRUPT_STATUS);
>  
> +	v4l2_dbg(2, debug, &video->v4l2_dev, "irq sts=%#x %s%s%s%s\n", sts,
> +		 sts & VE_INTERRUPT_MODE_DETECT_WD ? ", unlock" : "",
> +		 sts & VE_INTERRUPT_MODE_DETECT ? ", lock" : "",
> +		 sts & VE_INTERRUPT_CAPTURE_COMPLETE ? ", capture-done" : "",
> +		 sts & VE_INTERRUPT_COMP_COMPLETE ? ", comp-done" : "");
> +
>  	/*
>  	 * Resolution changed or signal was lost; reset the engine and
>  	 * re-initialize
> @@ -910,6 +921,7 @@ static void aspeed_video_set_resolution(struct aspeed_video *video)
>  
>  	/* Don't use direct mode below 1024 x 768 (irqs don't fire) */
>  	if (size < DIRECT_FETCH_THRESHOLD) {
> +		v4l2_dbg(1, debug, &video->v4l2_dev, "Capture: Sync Mode\n");
>  		aspeed_video_write(video, VE_TGS_0,
>  				   FIELD_PREP(VE_TGS_FIRST,
>  					      video->frame_left - 1) |
> @@ -921,6 +933,7 @@ static void aspeed_video_set_resolution(struct aspeed_video *video)
>  					      video->frame_bottom + 1));
>  		aspeed_video_update(video, VE_CTRL, 0, VE_CTRL_INT_DE);
>  	} else {
> +		v4l2_dbg(1, debug, &video->v4l2_dev, "Capture: Direct Mode\n");
>  		aspeed_video_update(video, VE_CTRL, 0, VE_CTRL_DIRECT_FETCH);
>  	}
>  
> @@ -937,6 +950,10 @@ static void aspeed_video_set_resolution(struct aspeed_video *video)
>  		if (!aspeed_video_alloc_buf(video, &video->srcs[1], size))
>  			goto err_mem;
>  
> +		v4l2_dbg(1, debug, &video->v4l2_dev, "src buf0 addr(%#x) size(%d)\n",
> +			 video->srcs[0].dma, video->srcs[0].size);
> +		v4l2_dbg(1, debug, &video->v4l2_dev, "src buf1 addr(%#x) size(%d)\n",
> +			 video->srcs[1].dma, video->srcs[1].size);
>  		aspeed_video_write(video, VE_SRC0_ADDR, video->srcs[0].dma);
>  		aspeed_video_write(video, VE_SRC1_ADDR, video->srcs[1].dma);
>  	}
> @@ -1201,6 +1218,9 @@ static int aspeed_video_set_dv_timings(struct file *file, void *fh,
>  
>  	timings->type = V4L2_DV_BT_656_1120;
>  
> +	v4l2_dbg(1, debug, &video->v4l2_dev, "set new timings(%dx%d)\n",
> +		 timings->bt.width, timings->bt.height);
> +
>  	return 0;
>  }
>  
> @@ -1383,6 +1403,7 @@ static void aspeed_video_resolution_work(struct work_struct *work)
>  			.u.src_change.changes = V4L2_EVENT_SRC_CH_RESOLUTION,
>  		};
>  
> +		v4l2_dbg(1, debug, &video->v4l2_dev, "fire source change event\n");
>  		v4l2_event_queue(&video->vdev, &ev);
>  	} else if (test_bit(VIDEO_STREAMING, &video->flags)) {
>  		/* No resolution change so just restart streaming */
> @@ -1715,6 +1736,7 @@ static int aspeed_video_init(struct aspeed_video *video)
>  		dev_err(dev, "Unable to request IRQ %d\n", irq);
>  		return rc;
>  	}
> +	dev_info(video->dev, "irq %d\n", irq);
>  
>  	video->eclk = devm_clk_get(dev, "eclk");
>  	if (IS_ERR(video->eclk)) {
> @@ -1751,6 +1773,8 @@ static int aspeed_video_init(struct aspeed_video *video)
>  		rc = -ENOMEM;
>  		goto err_release_reserved_mem;
>  	}
> +	dev_info(video->dev, "alloc mem size(%d) at %#x for jpeg header\n",
> +		 VE_JPEG_HEADER_SIZE, video->jpeg.dma);
>  
>  	aspeed_video_init_jpeg_table(video->jpeg.virt, video->yuv420);
>  

You're using both v4l2_*() and dev_*() functions for printing messages.
They come with different prefixes, and it'd be better to stick with either,
not both.

-- 
Sakari Ailus