linux-kernel - Re: [PATCH 1/2] drm/panel: sitronix-st7789v: add panel orientation support

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Date:   Wed, 2 Aug 2023 14:39:09 +0200
From:   Neil Armstrong <neil.armstrong@...aro.org>
To:     Michael Riesch <michael.riesch@...fvision.net>,
        Sam Ravnborg <sam@...nborg.org>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Maxime Ripard <mripard@...nel.org>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        Sebastian Reichel <sre@...nel.org>,
        Gerald Loacker <gerald.loacker@...fvision.net>
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH 1/2] drm/panel: sitronix-st7789v: add panel orientation
 support

On 18/07/2023 17:12, Michael Riesch wrote:
> Determine the orientation of the display based on the device tree and
> propagate it.
> 
> While at it, fix the indentation in the struct drm_panel_funcs.
> 
> Signed-off-by: Michael Riesch <michael.riesch@...fvision.net>
> ---
>   drivers/gpu/drm/panel/panel-sitronix-st7789v.c | 28 +++++++++++++++++++++-----
>   1 file changed, 23 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/gpu/drm/panel/panel-sitronix-st7789v.c b/drivers/gpu/drm/panel/panel-sitronix-st7789v.c
> index bbc4569cbcdc..6575f07d49e3 100644
> --- a/drivers/gpu/drm/panel/panel-sitronix-st7789v.c
> +++ b/drivers/gpu/drm/panel/panel-sitronix-st7789v.c
> @@ -116,6 +116,7 @@ struct st7789v {
>   	struct spi_device *spi;
>   	struct gpio_desc *reset;
>   	struct regulator *power;
> +	enum drm_panel_orientation orientation;
>   };
>   
>   enum st7789v_prefix {
> @@ -170,6 +171,7 @@ static const struct drm_display_mode default_mode = {
>   static int st7789v_get_modes(struct drm_panel *panel,
>   			     struct drm_connector *connector)
>   {
> +	struct st7789v *ctx = panel_to_st7789v(panel);
>   	struct drm_display_mode *mode;
>   
>   	mode = drm_mode_duplicate(connector->dev, &default_mode);
> @@ -188,9 +190,22 @@ static int st7789v_get_modes(struct drm_panel *panel,
>   	connector->display_info.width_mm = 61;
>   	connector->display_info.height_mm = 103;
>   
> +	/*
> +	 * TODO: Remove once all drm drivers call
> +	 * drm_connector_set_orientation_from_panel()
> +	 */
> +	drm_connector_set_panel_orientation(connector, ctx->orientation);
> +
>   	return 1;
>   }
>   
> +static enum drm_panel_orientation st7789v_get_orientation(struct drm_panel *p)
> +{
> +	struct st7789v *ctx = panel_to_st7789v(p);
> +
> +	return ctx->orientation;
> +}
> +
>   static int st7789v_prepare(struct drm_panel *panel)
>   {
>   	struct st7789v *ctx = panel_to_st7789v(panel);
> @@ -346,11 +361,12 @@ static int st7789v_unprepare(struct drm_panel *panel)
>   }
>   
>   static const struct drm_panel_funcs st7789v_drm_funcs = {
> -	.disable	= st7789v_disable,
> -	.enable		= st7789v_enable,
> -	.get_modes	= st7789v_get_modes,
> -	.prepare	= st7789v_prepare,
> -	.unprepare	= st7789v_unprepare,
> +	.disable = st7789v_disable,
> +	.enable	= st7789v_enable,
> +	.get_modes = st7789v_get_modes,
> +	.get_orientation = st7789v_get_orientation,
> +	.prepare = st7789v_prepare,
> +	.unprepare = st7789v_unprepare,

Changing the indentation of the whole block is a spurious change,
either change it in a separate patch or use the current indentation style...

>   };
>   
>   static int st7789v_probe(struct spi_device *spi)
> @@ -382,6 +398,8 @@ static int st7789v_probe(struct spi_device *spi)
>   	if (ret)
>   		return ret;
>   
> +	of_drm_get_panel_orientation(spi->dev.of_node, &ctx->orientation);
> +
>   	drm_panel_add(&ctx->panel);
>   
>   	return 0;
> 

With this changed:

Reviewed-by: Neil Armstrong <neil.armstrong@...aro.org>

Thanks,
Neil