linux-kernel - Re: [PATCH] drm/mipi-dsi: add mipi_dsi_shutdown_peripheral

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Message-ID: <276fa41c-d575-419d-ae29-ad2acbe7f024@linaro.org>
Date: Thu, 8 Jan 2026 17:24:05 +0100
From: neil.armstrong@...aro.org
To: Avinal Kumar <avinal.xlvii@...il.com>, dri-devel@...ts.freedesktop.org,
 linux-kernel@...r.kernel.org
Cc: maarten.lankhorst@...ux.intel.com, mripard@...nel.org,
 tzimmermann@...e.de, airlied@...il.com, simona@...ll.ch
Subject: Re: [PATCH] drm/mipi-dsi: add mipi_dsi_shutdown_peripheral_multi

On 1/6/26 12:21, Avinal Kumar wrote:
> Add mipi_dsi_shutdown_peripheral_multi function and mark
> mipi_dsi_shutdown_peripheral function as deprecated.
> 
> Signed-off-by: Avinal Kumar <avinal.xlvii@...il.com>
> ---
> Please refer: https://patchwork.kernel.org/project/dri-devel/patch/20251127161337.396531-1-avinal.xlvii@gmail.com/#26719778
> Build and boot tested with QEMU.
> 
>   drivers/gpu/drm/drm_mipi_dsi.c | 28 ++++++++++++++++++++++++++++
>   include/drm/drm_mipi_dsi.h     |  1 +
>   2 files changed, 29 insertions(+)
> 
> diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c
> index a712e177b350..2fed50172a44 100644
> --- a/drivers/gpu/drm/drm_mipi_dsi.c
> +++ b/drivers/gpu/drm/drm_mipi_dsi.c
> @@ -587,6 +587,9 @@ EXPORT_SYMBOL(mipi_dsi_create_packet);
>    * mipi_dsi_shutdown_peripheral() - sends a Shutdown Peripheral command
>    * @dsi: DSI peripheral device
>    *
> + * This function is deprecated. Use mipi_dsi_shutdown_peripheral_multi()
> + * instead.
> + *
>    * Return: 0 on success or a negative error code on failure.
>    */
>   int mipi_dsi_shutdown_peripheral(struct mipi_dsi_device *dsi)
> @@ -1980,6 +1983,31 @@ void mipi_dsi_dcs_set_tear_scanline_multi(struct mipi_dsi_multi_context *ctx,
>   }
>   EXPORT_SYMBOL(mipi_dsi_dcs_set_tear_scanline_multi);
> 
> +/**
> + * mipi_dsi_shutdown_peripheral_multi() - sends a Shutdown Peripheral command
> + * @ctx: Context for multiple DSI transactions
> + *
> + * Like mipi_dsi_shutdown_peripheral() but deals with errors in a way that
> + * makes it convienient to make seeral calls in a row.
> + */
> +void mipi_dsi_shutdown_peripheral_multi(struct mipi_dsi_multi_context *ctx)
> +{
> +	struct mipi_dsi_device *dsi = ctx->dsi;
> +	struct device *dev = &dsi->dev;
> +	int ret;
> +
> +	if (ctx->accum_err)
> +		return;
> +
> +	ret = mipi_dsi_shutdown_peripheral(dsi);
> +	if (ret < 0) {
> +		ctx->accum_err = ret;
> +		dev_err(dev, "Failed to shutdown peripheral: %d\n",
> +			ctx->accum_err);
> +	}
> +}
> +EXPORT_SYMBOL(mipi_dsi_shutdown_peripheral_multi);
> +
>   static int mipi_dsi_drv_probe(struct device *dev)
>   {
>   	struct mipi_dsi_driver *drv = to_mipi_dsi_driver(dev->driver);
> diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h
> index 3aba7b380c8d..19ccdf5eeb5f 100644
> --- a/include/drm/drm_mipi_dsi.h
> +++ b/include/drm/drm_mipi_dsi.h
> @@ -389,6 +389,7 @@ void mipi_dsi_dcs_set_page_address_multi(struct mipi_dsi_multi_context *ctx,
>   void mipi_dsi_dcs_set_tear_scanline_multi(struct mipi_dsi_multi_context *ctx,
>   					  u16 scanline);
>   void mipi_dsi_dcs_set_tear_off_multi(struct mipi_dsi_multi_context *ctx);
> +void mipi_dsi_shutdown_peripheral_multi(struct mipi_dsi_multi_context *ctx);
> 
>   /**
>    * mipi_dsi_generic_write_seq_multi - transmit data using a generic write packet
> --
> 2.52.0
> 


Looks good, please send a multi-patch patchset with "drm/panel: panasonic-vvx10f034n00: transition to mipi_dsi wrapped functions"
updated to use this function aswell.

If you want to use a simpler way to generate patchsets, please have a look the b4 tool.

Neil