[PATCH v2 2/3] drm/mipi-dsi: add mipi_dsi_usleep_range helper

[Jerome Brunet <jbrunet@baylibre.com>]

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@linaro.org>
Signed-off-by: Jerome Brunet <jbrunet@baylibre.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
-- 
2.43.0