# Re: \[PATCH v3\] video: sh7760fb: SH7760/SH7763 LCDC framebuffer driver

- From: Paul Mundt \<hidden\>
- Date: 2008-07-01 08:02:55 
- List: linux-fbdev
- Page: https://ratatoskr.run/linux-fbdev/2008/07/13458442
- Thread: https://ratatoskr.run/linux-sh/2008/07/13458441/t.md

```text
On Tue, Jul 01, 2008 at 04:26:11PM +0900, Nobuhiro Iwamatsu wrote:
> +====================== cut here ======================================
> +
> +#include <linux/fb.h>
> +#include <asm/sh7760fb.h>
> +
> +/*
> + * NEC NL6440bc26-01 640x480 TFT
> + * dotclock 25175 kHz
> + * Xres		640	Yres		480
> + * Htotal	800	Vtotal		525
> + * HsynStart	656	VsynStart	490
> + * HsynLenn	30	VsynLenn	2
> + *
> + * The linux framebuffer layer does not use the syncstart/synclen
> + * values but right/left/upper/lower margin values. The comments
> + * for the x_margin explain how to calculate those from given
> + * panel sync timings.
> + */
> +static struct fb_videomode nl6448bc26 = {
> +/*	.name		= "NL6448BC26",*/
> +/*	.refresh	= 60,	*/
> +	.xres		= 640,
> +	.yres		= 480,
Why are .name and .refresh commented out?

> +static void sh7760fb_wait_vsync(struct fb_info *info)
> +{
> +	struct sh7760fb_par *par = info->par;
> +
> +	if (par->pd->novsync)
> +		return;
> +}
> +
This doesn't do anything, and you never use ->novsync for anything
anywhere else either. I'd suggest killing both of them off until such a
time that you plan to do something with it.

> +	/* poll for access grant */
> +	tmo = 100;
> +	while (!(ioread16(par->base + LDPALCR) & (1 << 4)) && (--tmo))
> +		msleep(0);
> +
Err.. you are sleeping for 0ms? Just use cpu_relax() here instead if you
don't have an explicit timing requirement.

> +	if (((ldmtr & 0x003f) >= LDMTR_DSTN_MONO_8) &&
> +	    ((ldmtr & 0x003f) <= LDMTR_DSTN_COLOR_16)) {
> +
> +		pr_debug(" ***** DSTN untested! *****\n");
> +
This should still use dev_dbg() for consistency.

Looks good to me otherwise, fix those up and feel free to add a:

Reviewed-by: Paul Mundt <redacted>

to the next version.

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