android-5.4/ANDROID-drivers-gpu-drm-add-support-to-batch-commands.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Shashank Babu Chinta Venkata <sbchin@codeaurora.org>
Date: Tue, 19 Nov 2019 14:02:09 -0800
Subject: ANDROID: drivers: gpu: drm: add support to batch commands

MSM DSI framework has capability to batch commands and
do kickoff once MIPI_DSI_MSG_LASTCOMMAND flag is set. This enables
related commands to be grouped and sent in one dma kickoff.

Signed-off-by: Shashank Babu Chinta Venkata <sbchin@codeaurora.org>
Bug: 139653858
Change-Id: I2742c62a90e9a194848a612eef40a22103bb6596
---
 drivers/gpu/drm/drm_mipi_dsi.c | 1 +
 include/drm/drm_mipi_dsi.h     | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c
index bd2498bbd74a..4e6bae401031 100644
--- a/drivers/gpu/drm/drm_mipi_dsi.c
+++ b/drivers/gpu/drm/drm_mipi_dsi.c
@@ -355,6 +355,7 @@ static ssize_t mipi_dsi_device_transfer(struct mipi_dsi_device *dsi,
 
 	if (dsi->mode_flags & MIPI_DSI_MODE_LPM)
 		msg->flags |= MIPI_DSI_MSG_USE_LPM;
+	msg->flags |= MIPI_DSI_MSG_LASTCOMMAND;
 
 	return ops->transfer(dsi->host, msg);
 }
diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h
index c7923233e735..efd059045afd 100644
--- a/include/drm/drm_mipi_dsi.h
+++ b/include/drm/drm_mipi_dsi.h
@@ -20,6 +20,8 @@ struct mipi_dsi_device;
 #define MIPI_DSI_MSG_USE_LPM	BIT(1)
 /* read mipi_dsi_msg.ctrl and unicast to only that ctrls */
 #define MIPI_DSI_MSG_UNICAST	BIT(2)
+/* Stack all commands until lastcommand bit and trigger all in one go */
+#define MIPI_DSI_MSG_LASTCOMMAND BIT(3)
 
 /**
  * struct mipi_dsi_msg - read/write DSI buffer