答复: [PATCH] drm/hisilicon: add the mode_valid function

["tiantao (H)" <tiantao6@hisilicon.com>]

Hi Thomas Zimmermann:

	I will modify this patch and send v2 as you suggested.
	Thank you very much.

Best

-----邮件原件-----
发件人: Thomas Zimmermann [mailto:tzimmermann@suse.de] 
发送时间: 2020年1月8日 16:49
收件人: tiantao (H) <tiantao6@hisilicon.com>; Chenfeng (puck) <puck.chen@hisilicon.com>; airlied@linux.ie; daniel@ffwll.ch; kraxel@redhat.com; alexander.deucher@amd.com; tglx@linutronix.de; dri-devel@lists.freedesktop.org; xinliang.liu@linaro.org; linux-kernel@vger.kernel.org
抄送: Linuxarm <linuxarm@huawei.com>
主题: Re: [PATCH] drm/hisilicon: add the mode_valid function

Hi,

here are a few more nits to fix.

Am 08.01.20 um 09:19 schrieb Tian Tao:
> add mode_valid function, and we can also use it to make suse the 
> resolution is valid.

Start with capital 'Add' and make it a simple sentence. Change 'suse' to 'sure'

> 
> Signed-off-by: Tian Tao <tiantao6@hisilicon.com>
> Signed-off-by: Gong junjie <gongjunjie2@huawei.com>
> ---
>  drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_de.c | 20 
> ++++++++++++++++++++
>  1 file changed, 20 insertions(+)
> 
> diff --git a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_de.c 
> b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_de.c
> index 843d784..6cb7a79 100644
> --- a/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_de.c
> +++ b/drivers/gpu/drm/hisilicon/hibmc/hibmc_drm_de.c
> @@ -242,6 +242,25 @@ static void hibmc_crtc_atomic_disable(struct drm_crtc *crtc,
>  	hibmc_set_current_gate(priv, reg);
>  }
>  
> +enum drm_mode_status hibmc_crtc_mode_valid(struct drm_crtc *crtc,
> +					const struct drm_display_mode *mode)

Please declare this function as static.

> +{
> +	int i = 0;
> +	int vrefresh = drm_mode_vrefresh(mode);
> +
> +	if (vrefresh < 59 || vrefresh > 61)
> +		return MODE_NOMODE;

I'd return MODE_NOCLOCK or MODE_CLOCK_RANGE.

> +
> +	for (i = 0; i < ARRAY_SIZE(hibmc_pll_table); i++) {
> +		if (hibmc_pll_table[i].hdisplay == mode->hdisplay &&
> +			hibmc_pll_table[i].vdisplay == mode->vdisplay)
> +			return MODE_OK;
> +	}
> +
> +	return MODE_NOMODE;

Maybe return MODE_BAD. MODE_NOMODE apparently refers to a descriptive string for the mode.

> +}
> +
> +

One one empty line please.

With these fixes applied, you can add my

Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>

Best regards
Thomas


>  static unsigned int format_pll_reg(void)  {
>  	unsigned int pllreg = 0;
> @@ -510,6 +529,7 @@ static const struct drm_crtc_helper_funcs hibmc_crtc_helper_funcs = {
>  	.atomic_flush	= hibmc_crtc_atomic_flush,
>  	.atomic_enable	= hibmc_crtc_atomic_enable,
>  	.atomic_disable	= hibmc_crtc_atomic_disable,
> +	.mode_valid = hibmc_crtc_mode_valid,
>  };
>  
>  int hibmc_de_init(struct hibmc_drm_private *priv)
> 

--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer