From: Vinay Simha BN <simhavcs@gmail.com>
To: unlisted-recipients:; (no To-header on input)
Cc: Vinay Simha BN <simhavcs@gmail.com>,
Archit Taneja <archit.taneja@gmail.com>,
John Stultz <john.stultz@linaro.org>,
Thierry Reding <thierry.reding@gmail.com>,
Sumit Semwal <sumit.semwal@linaro.org>,
Jani Nikula <jani.nikula@linux.intel.com>,
David Airlie <airlied@linux.ie>,
dri-devel@lists.freedesktop.org (open list:DRM DRIVERS),
linux-kernel@vger.kernel.org (open list)
Subject: [PATCH v2] drm/dsi: Implement set tear scanline
Date: Mon, 6 Jun 2016 23:11:37 +0530 [thread overview]
Message-ID: <1465234897-21365-1-git-send-email-simhavcs@gmail.com> (raw)
Provide a small convenience wrapper that transmits
a set_tear_scanline command.
Also includes small build fixes from Sumit Semwal.
Cc: Archit Taneja <archit.taneja@gmail.com>
Cc: John Stultz <john.stultz@linaro.org>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Signed-off-by: Vinay Simha BN <simhavcs@gmail.com>
--
v1:
* helper function suggested by Thierry
for set_tear_scanline
v2:
* one scanline parameter suggested by jani
---
drivers/gpu/drm/drm_mipi_dsi.c | 22 ++++++++++++++++++++++
include/drm/drm_mipi_dsi.h | 1 +
2 files changed, 23 insertions(+)
diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c
index f5d8083..c02d083 100644
--- a/drivers/gpu/drm/drm_mipi_dsi.c
+++ b/drivers/gpu/drm/drm_mipi_dsi.c
@@ -983,6 +983,28 @@ 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
+ * @param: STS[10:0]
+ * Return: 0 on success or a negative error code on failure
+ */
+int mipi_dsi_set_tear_scanline(struct mipi_dsi_device *dsi, u16 param)
+{
+ u8 payload[3] = { MIPI_DCS_SET_TEAR_SCANLINE, param >> 8,
+ param & 0xff };
+ 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..ec55285 100644
--- a/include/drm/drm_mipi_dsi.h
+++ b/include/drm/drm_mipi_dsi.h
@@ -263,6 +263,7 @@ 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, u16 param);
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);
--
1.9.1
next reply other threads:[~2016-06-06 17:41 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-06 17:41 Vinay Simha BN [this message]
2016-06-07 6:54 ` [PATCH v2] drm/dsi: Implement set tear scanline Jani Nikula
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