linux-kernel - Re: [PATCH v2 1/4] drm/tinydrm: remove call to mipi_dbi_init() from mipi_dbi_spi

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Message-ID: <2cca58ba-74ba-919b-1c73-82e4009c126d@tronnes.org>
Date:   Wed, 2 Aug 2017 20:53:05 +0200
From:   Noralf Trønnes <noralf@...nnes.org>
To:     David Lechner <david@...hnology.com>,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org
Cc:     Daniel Vetter <daniel@...ll.ch>, David Airlie <airlied@...ux.ie>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Sekhar Nori <nsekhar@...com>,
        Kevin Hilman <khilman@...nel.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/4] drm/tinydrm: remove call to mipi_dbi_init() from
 mipi_dbi_spi_init()


Den 02.08.2017 00.11, skrev David Lechner:
> This removes the call to mipi_dbi_init() from mipi_dbi_spi_init() so that
> drivers can have a driver-specific implementation if needed.
>
> Also fixed order of @dc parameter in the doc comment.
>
> Suggested-by: Noralf Trønnes <noralf@...nnes.org>
> Signed-off-by: David Lechner <david@...hnology.com>
> ---

Reviewed-by: Noralf Trønnes <noralf@...nnes.org>

Add this when you resend the series, if I haven't applied it.

>   drivers/gpu/drm/tinydrm/mi0283qt.c |  8 ++++++--
>   drivers/gpu/drm/tinydrm/mipi-dbi.c | 17 +++++------------
>   include/drm/tinydrm/mipi-dbi.h     |  6 +-----
>   3 files changed, 12 insertions(+), 19 deletions(-)
>
> diff --git a/drivers/gpu/drm/tinydrm/mi0283qt.c b/drivers/gpu/drm/tinydrm/mi0283qt.c
> index 482ff1c3..7e5bb7d 100644
> --- a/drivers/gpu/drm/tinydrm/mi0283qt.c
> +++ b/drivers/gpu/drm/tinydrm/mi0283qt.c
> @@ -195,8 +195,12 @@ static int mi0283qt_probe(struct spi_device *spi)
>   
>   	device_property_read_u32(dev, "rotation", &rotation);
>   
> -	ret = mipi_dbi_spi_init(spi, mipi, dc, &mi0283qt_pipe_funcs,
> -				&mi0283qt_driver, &mi0283qt_mode, rotation);
> +	ret = mipi_dbi_spi_init(spi, mipi, dc);
> +	if (ret)
> +		return ret;
> +
> +	ret = mipi_dbi_init(&spi->dev, mipi, &mi0283qt_pipe_funcs,
> +			    &mi0283qt_driver, &mi0283qt_mode, rotation);
>   	if (ret)
>   		return ret;
>   
> diff --git a/drivers/gpu/drm/tinydrm/mipi-dbi.c b/drivers/gpu/drm/tinydrm/mipi-dbi.c
> index e10fa4b..cba9784 100644
> --- a/drivers/gpu/drm/tinydrm/mipi-dbi.c
> +++ b/drivers/gpu/drm/tinydrm/mipi-dbi.c
> @@ -777,15 +777,12 @@ static int mipi_dbi_typec3_command(struct mipi_dbi *mipi, u8 cmd,
>   /**
>    * mipi_dbi_spi_init - Initialize MIPI DBI SPI interfaced controller
>    * @spi: SPI device
> - * @dc: D/C gpio (optional)
>    * @mipi: &mipi_dbi structure to initialize
> - * @pipe_funcs: Display pipe functions
> - * @driver: DRM driver
> - * @mode: Display mode
> - * @rotation: Initial rotation in degrees Counter Clock Wise
> + * @dc: D/C gpio (optional)
>    *
>    * This function sets &mipi_dbi->command, enables &mipi->read_commands for the
> - * usual read commands and initializes @mipi using mipi_dbi_init().
> + * usual read commands. It should be followed by a call to mipi_dbi_init() or
> + * a driver-specific init.
>    *
>    * If @dc is set, a Type C Option 3 interface is assumed, if not
>    * Type C Option 1.
> @@ -800,11 +797,7 @@ static int mipi_dbi_typec3_command(struct mipi_dbi *mipi, u8 cmd,
>    * Zero on success, negative error code on failure.
>    */
>   int mipi_dbi_spi_init(struct spi_device *spi, struct mipi_dbi *mipi,
> -		      struct gpio_desc *dc,
> -		      const struct drm_simple_display_pipe_funcs *pipe_funcs,
> -		      struct drm_driver *driver,
> -		      const struct drm_display_mode *mode,
> -		      unsigned int rotation)
> +		      struct gpio_desc *dc)
>   {
>   	size_t tx_size = tinydrm_spi_max_transfer_size(spi, 0);
>   	struct device *dev = &spi->dev;
> @@ -850,7 +843,7 @@ int mipi_dbi_spi_init(struct spi_device *spi, struct mipi_dbi *mipi,
>   			return -ENOMEM;
>   	}
>   
> -	return mipi_dbi_init(dev, mipi, pipe_funcs, driver, mode, rotation);
> +	return 0;
>   }
>   EXPORT_SYMBOL(mipi_dbi_spi_init);
>   
> diff --git a/include/drm/tinydrm/mipi-dbi.h b/include/drm/tinydrm/mipi-dbi.h
> index d137b16..83346dd 100644
> --- a/include/drm/tinydrm/mipi-dbi.h
> +++ b/include/drm/tinydrm/mipi-dbi.h
> @@ -62,11 +62,7 @@ mipi_dbi_from_tinydrm(struct tinydrm_device *tdev)
>   }
>   
>   int mipi_dbi_spi_init(struct spi_device *spi, struct mipi_dbi *mipi,
> -		      struct gpio_desc *dc,
> -		      const struct drm_simple_display_pipe_funcs *pipe_funcs,
> -		      struct drm_driver *driver,
> -		      const struct drm_display_mode *mode,
> -		      unsigned int rotation);
> +		      struct gpio_desc *dc);
>   int mipi_dbi_init(struct device *dev, struct mipi_dbi *mipi,
>   		  const struct drm_simple_display_pipe_funcs *pipe_funcs,
>   		  struct drm_driver *driver,