linux-kernel - Re: [PATCH v2 2/3] drm/mipi-dsi: add mipi_dsi_usleep

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Date: Wed, 26 Jun 2024 18:35:11 +0200
From: Neil Armstrong <neil.armstrong@...aro.org>
To: Jerome Brunet <jbrunet@...libre.com>,
 Jessica Zhang <quic_jesszhan@...cinc.com>, Sam Ravnborg <sam@...nborg.org>,
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,
 David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>
Cc: linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, dri-devel@...ts.freedesktop.org,
 Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Subject: Re: [PATCH v2 2/3] drm/mipi-dsi: add mipi_dsi_usleep_range helper

On 26/06/2024 16:22, Jerome Brunet wrote:
> Like for mipi_dsi_msleep(), usleep_range() may often be called
> in between mipi_dsi_dcs_*() functions and needs a multi compatible
> counter part.
> 
> Suggested-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> Signed-off-by: Jerome Brunet <jbrunet@...libre.com>
> ---
>   include/drm/drm_mipi_dsi.h | 7 +++++++
>   1 file changed, 7 insertions(+)
> 
> diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h
> index 71d121aeef24..0f520eeeaa8e 100644
> --- a/include/drm/drm_mipi_dsi.h
> +++ b/include/drm/drm_mipi_dsi.h
> @@ -10,6 +10,7 @@
>   #define __DRM_MIPI_DSI_H__
>   
>   #include <linux/device.h>
> +#include <linux/delay.h>
>   
>   struct mipi_dsi_host;
>   struct mipi_dsi_device;
> @@ -297,6 +298,12 @@ ssize_t mipi_dsi_generic_read(struct mipi_dsi_device *dsi, const void *params,
>   			msleep(delay);	\
>   	} while (0)
>   
> +#define mipi_dsi_usleep_range(ctx, min, max)	\
> +	do {					\
> +		if (!(ctx)->accum_err)		\
> +			usleep_range(min, max);	\
> +	} while (0)
> +
>   /**
>    * enum mipi_dsi_dcs_tear_mode - Tearing Effect Output Line mode
>    * @MIPI_DSI_DCS_TEAR_MODE_VBLANK: the TE output line consists of V-Blanking

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