linux-kernel - Re: [PATCH] drm/hisilicon: add the mode

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Message-ID: <ae14b728-d2dc-282d-2fed-19bf6db4df64@suse.de>
Date:   Wed, 8 Jan 2020 09:48:38 +0100
From:   Thomas Zimmermann <tzimmermann@...e.de>
To:     Tian Tao <tiantao6@...ilicon.com>, puck.chen@...ilicon.com,
        airlied@...ux.ie, daniel@...ll.ch, kraxel@...hat.com,
        alexander.deucher@....com, tglx@...utronix.de,
        dri-devel@...ts.freedesktop.org, xinliang.liu@...aro.org,
        linux-kernel@...r.kernel.org
Cc:     linuxarm@...wei.com
Subject: 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@...ilicon.com>
> Signed-off-by: Gong junjie <gongjunjie2@...wei.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@...e.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



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