linux-kernel - Re: [PATCH v3 04/14] drm/sun4i: hdmi: Use more portable I/O helpers

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Date:   Sun, 24 Apr 2022 21:59:44 +0200
From:   Jernej Škrabec <jernej.skrabec@...il.com>
To:     Chen-Yu Tsai <wens@...e.org>, Maxime Ripard <mripard@...nel.org>,
        Samuel Holland <samuel@...lland.org>
Cc:     Samuel Holland <samuel@...lland.org>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...ux.ie>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org,
        dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-sunxi@...ts.linux.dev, kernel test robot <lkp@...el.com>
Subject: Re: [PATCH v3 04/14] drm/sun4i: hdmi: Use more portable I/O helpers

Dne nedelja, 24. april 2022 ob 18:26:22 CEST je Samuel Holland napisal(a):
> readsb/writesb are unavailable on some architectures. In preparation for
> removing the Kconfig architecture dependency, switch to the equivalent
> but more portable ioread/write8_rep helpers.
> 
> Reported-by: kernel test robot <lkp@...el.com>
> Signed-off-by: Samuel Holland <samuel@...lland.org>

Reviewed-by: Jernej Skrabec <jernej.skrabec@...il.com>

Best regards,
Jernej Skrabec

> ---
> 
> (no changes since v2)
> 
> Changes in v2:
>  - New patch: I/O helper portability
> 
>  drivers/gpu/drm/sun4i/sun4i_hdmi_i2c.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/sun4i/sun4i_hdmi_i2c.c b/drivers/gpu/drm/sun4i/
sun4i_hdmi_i2c.c
> index b66fa27fe6ea..c7d7e9fff91c 100644
> --- a/drivers/gpu/drm/sun4i/sun4i_hdmi_i2c.c
> +++ b/drivers/gpu/drm/sun4i/sun4i_hdmi_i2c.c
> @@ -56,9 +56,9 @@ static int fifo_transfer(struct sun4i_hdmi *hdmi, u8 *buf, 
int len, bool read)
>  		return -EIO;
>  
>  	if (read)
> -		readsb(hdmi->base + hdmi->variant->ddc_fifo_reg, buf, 
len);
> +		ioread8_rep(hdmi->base + hdmi->variant->ddc_fifo_reg, 
buf, len);
>  	else
> -		writesb(hdmi->base + hdmi->variant->ddc_fifo_reg, buf, 
len);
> +		iowrite8_rep(hdmi->base + hdmi->variant->ddc_fifo_reg, 
buf, len);
>  
>  	/* Clear FIFO request bit by forcing a write to that bit */
>  	regmap_field_force_write(hdmi->field_ddc_int_status,
> -- 
> 2.35.1
> 
>