Patch "drm/sun4i: Add compatible string for A31/A31s TCON (timing controller)" has been added to the 4.9-stable tree

Patch "drm/sun4i: Add compatible string for A31/A31s TCON (timing controller)" has been added to the 4.9-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    drm/sun4i: Add compatible string for A31/A31s TCON (timing controller)

to the 4.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     drm-sun4i-add-compatible-string-for-a31-a31s-tcon-timing-controller.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 93a5ec14da24a8abbac5bcb953b45cc7a5d0198a Mon Sep 17 00:00:00 2001
From: Chen-Yu Tsai <wens@csie.org>
Date: Thu, 20 Oct 2016 11:43:40 +0800
Subject: drm/sun4i: Add compatible string for A31/A31s TCON (timing controller)

From: Chen-Yu Tsai <wens@csie.org>

commit 93a5ec14da24a8abbac5bcb953b45cc7a5d0198a upstream.

The A31 TCON has mux controls for how TCON outputs are routed to the
HDMI and MIPI DSI blocks.

Since the A31s does not have MIPI DSI, it only has a mux for the HDMI
controller input.

This patch only adds support for the compatible strings. Actual support
for the mux controls should be added with HDMI and MIPI DSI support.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt |    4 +++-
 drivers/gpu/drm/sun4i/sun4i_drv.c                             |    2 ++
 drivers/gpu/drm/sun4i/sun4i_tcon.c                            |   10 ++++++++++
 3 files changed, 15 insertions(+), 1 deletion(-)

--- a/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
+++ b/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
@@ -28,6 +28,8 @@ The TCON acts as a timing controller for
 Required properties:
  - compatible: value must be either:
    * allwinner,sun5i-a13-tcon
+   * allwinner,sun6i-a31-tcon
+   * allwinner,sun6i-a31s-tcon
    * allwinner,sun8i-a33-tcon
  - reg: base address and size of memory-mapped region
  - interrupts: interrupt associated to this IP
@@ -50,7 +52,7 @@ Required properties:
   second the block connected to the TCON channel 1 (usually the TV
   encoder)
 
-On the A13, there is one more clock required:
+On SoCs other than the A33, there is one more clock required:
    - 'tcon-ch1': The clock driving the TCON channel 1
 
 DRC
--- a/drivers/gpu/drm/sun4i/sun4i_drv.c
+++ b/drivers/gpu/drm/sun4i/sun4i_drv.c
@@ -208,6 +208,8 @@ static bool sun4i_drv_node_is_frontend(s
 static bool sun4i_drv_node_is_tcon(struct device_node *node)
 {
 	return of_device_is_compatible(node, "allwinner,sun5i-a13-tcon") ||
+		of_device_is_compatible(node, "allwinner,sun6i-a31-tcon") ||
+		of_device_is_compatible(node, "allwinner,sun6i-a31s-tcon") ||
 		of_device_is_compatible(node, "allwinner,sun8i-a33-tcon");
 }
 
--- a/drivers/gpu/drm/sun4i/sun4i_tcon.c
+++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c
@@ -587,12 +587,22 @@ static const struct sun4i_tcon_quirks su
 	.has_channel_1	= true,
 };
 
+static const struct sun4i_tcon_quirks sun6i_a31_quirks = {
+	.has_channel_1	= true,
+};
+
+static const struct sun4i_tcon_quirks sun6i_a31s_quirks = {
+	.has_channel_1	= true,
+};
+
 static const struct sun4i_tcon_quirks sun8i_a33_quirks = {
 	/* nothing is supported */
 };
 
 static const struct of_device_id sun4i_tcon_of_table[] = {
 	{ .compatible = "allwinner,sun5i-a13-tcon", .data = &sun5i_a13_quirks },
+	{ .compatible = "allwinner,sun6i-a31-tcon", .data = &sun6i_a31_quirks },
+	{ .compatible = "allwinner,sun6i-a31s-tcon", .data = &sun6i_a31s_quirks },
 	{ .compatible = "allwinner,sun8i-a33-tcon", .data = &sun8i_a33_quirks },
 	{ }
 };


Patches currently in stable-queue which might be from wens@csie.org are

queue-4.9/drm-sun4i-tcon-move-soc-specific-quirks-to-a-dt-matched-data-structure.patch
queue-4.9/drm-sun4i-add-compatible-string-for-a31-a31s-tcon-timing-controller.patch
queue-4.9/drm-sun4i-add-compatible-strings-for-a31-a31s-display-pipelines.patch