linux-kernel - [PATCH] drm/mipi-dsi: Add a mipi_dual_dsi_dcs_write

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Message-Id: <20230310110542.6649-1-lujianhua000@gmail.com>
Date:   Fri, 10 Mar 2023 19:05:42 +0800
From:   Jianhua Lu <lujianhua000@...il.com>
To:     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:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        ~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.org,
        Jianhua Lu <lujianhua000@...il.com>
Subject: [PATCH] drm/mipi-dsi: Add a mipi_dual_dsi_dcs_write_seq() macro

The panels with two dsi connected (sync dual dsi mode) need to transmit
dcs command to the two dsi host simultaneously, let's add
mipi_dual_dsi_dcs_write_seq() macro for this kind of panels.

Signed-off-by: Jianhua Lu <lujianhua000@...il.com>
---
 include/drm/drm_mipi_dsi.h | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h
index c9df0407980c..d0f0f75d4d83 100644
--- a/include/drm/drm_mipi_dsi.h
+++ b/include/drm/drm_mipi_dsi.h
@@ -336,6 +336,21 @@ int mipi_dsi_dcs_get_display_brightness_large(struct mipi_dsi_device *dsi,
 		}                                                          \
 	} while (0)
 
+/**
+ * mipi_dsi_dcs_write_seq - transmit a DCS command with payload
+ * @dsi: array of 2 DSI peripheral devices
+ * @cmd: Command
+ * @seq: buffer containing data to be transmitted
+ */
+#define mipi_dual_dsi_dcs_write_seq(dsi, cmd, seq...)                   \
+	do {                                                             \
+		if (ARRAY_SIZE(dsi) > 2)                                 \
+			return -EINVAL;                                  \
+		int i;                                                   \
+		for (i = 0; i < ARRAY_SIZE(dsi); i++)                    \
+			mipi_dsi_dcs_write_seq(dsi[i], cmd, seq);        \
+	} while (0)
+
 /**
  * struct mipi_dsi_driver - DSI driver
  * @driver: device driver model driver
-- 
2.39.2