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Message-Id: <1461220017-8897-1-git-send-email-simhavcs@gmail.com>
Date: Thu, 21 Apr 2016 11:56:57 +0530
From: Vinay Simha BN <simhavcs@...il.com>
To: unlisted-recipients:; (no To-header on input)
Cc: Vinay Simha BN <simhavcs@...il.com>,
Archit Taneja <archit.taneja@...il.com>,
John Stultz <john.stultz@...aro.org>,
Thierry Reding <thierry.reding@...il.com>,
Sumit Semwal <sumit.semwal@...aro.org>,
David Airlie <airlied@...ux.ie>,
dri-devel@...ts.freedesktop.org (open list:DRM DRIVERS),
linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v3] drm/dsi: Implement set tear scanline
Provide a small convenience wrapper that transmits
a set_tear_scanline command.
Cc: Archit Taneja <archit.taneja@...il.com>
Cc: John Stultz <john.stultz@...aro.org>
[thierry.reding: suggested to create helper function (v1)]
Cc: Thierry Reding <thierry.reding@...il.com>
[sumit.semwal: create a single patch for compilation fix (v2)]
Cc: Sumit Semwal <sumit.semwal@...aro.org>
[vinay simha bn: subject line changed (v3)]
Signed-off-by: Vinay Simha BN <simhavcs@...il.com>
---
drivers/gpu/drm/drm_mipi_dsi.c | 23 +++++++++++++++++++++++
include/drm/drm_mipi_dsi.h | 2 ++
2 files changed, 25 insertions(+)
diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c
index f5d8083..2f0b85c 100644
--- a/drivers/gpu/drm/drm_mipi_dsi.c
+++ b/drivers/gpu/drm/drm_mipi_dsi.c
@@ -983,6 +983,29 @@ int mipi_dsi_dcs_set_tear_on(struct mipi_dsi_device *dsi,
EXPORT_SYMBOL(mipi_dsi_dcs_set_tear_on);
/**
+ * mipi_dsi_set_tear_scanline() - turn on the display module's Tearing Effect
+ * output signal on the TE signal line when display module reaches line N
+ * defined by STS[n:0].
+ * @dsi: DSI peripheral device
+ * @param1: STS[10:8]
+ * @param2: STS[7:0]
+ * Return: 0 on success or a negative error code on failure
+ */
+int mipi_dsi_set_tear_scanline(struct mipi_dsi_device *dsi,
+ u8 param1, u8 param2)
+{
+ u8 payload[3] = { MIPI_DCS_SET_TEAR_SCANLINE, param1, param2};
+ ssize_t err;
+
+ err = mipi_dsi_generic_write(dsi, &payload, sizeof(payload));
+ if (err < 0)
+ return err;
+
+ return 0;
+}
+EXPORT_SYMBOL(mipi_dsi_set_tear_scanline);
+
+/**
* mipi_dsi_dcs_set_pixel_format() - sets the pixel format for the RGB image
* data used by the interface
* @dsi: DSI peripheral device
diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h
index 7a9840f..2788dbe 100644
--- a/include/drm/drm_mipi_dsi.h
+++ b/include/drm/drm_mipi_dsi.h
@@ -263,6 +263,8 @@ int mipi_dsi_dcs_set_column_address(struct mipi_dsi_device *dsi, u16 start,
u16 end);
int mipi_dsi_dcs_set_page_address(struct mipi_dsi_device *dsi, u16 start,
u16 end);
+int mipi_dsi_set_tear_scanline(struct mipi_dsi_device *dsi, u8 param1,
+ u8 param2);
int mipi_dsi_dcs_set_tear_off(struct mipi_dsi_device *dsi);
int mipi_dsi_dcs_set_tear_on(struct mipi_dsi_device *dsi,
enum mipi_dsi_dcs_tear_mode mode);
--
2.1.2
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