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[PATCH v2 7/9] drm/sun4i: tcon: Copy ID from associated backend

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The tcons and backends have a one-to-one relationship. Their IDs,
or indexes in the documentation, are also the same.

Copy the ID from the associated backend and save it in the tcon
structure. This will later be used when we add support for the
output data path muxes.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
---
 drivers/gpu/drm/sun4i/sun4i_tcon.c | 1 +
 drivers/gpu/drm/sun4i/sun4i_tcon.h | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c
index 4409e7b6c74d..8301389c411d 100644
--- a/drivers/gpu/drm/sun4i/sun4i_tcon.c
+++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c
@@ -540,6 +540,7 @@ static int sun4i_tcon_bind(struct device *dev, struct device *master,
 	dev_set_drvdata(dev, tcon);
 	tcon->drm = drm;
 	tcon->dev = dev;
+	tcon->id = backend->id;
 	tcon->quirks = of_device_get_match_data(dev);
 
 	tcon->lcd_rst = devm_reset_control_get(dev, "lcd");
diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.h b/drivers/gpu/drm/sun4i/sun4i_tcon.h
index 1bda4d183eec..d37e1e2ed60e 100644
--- a/drivers/gpu/drm/sun4i/sun4i_tcon.h
+++ b/drivers/gpu/drm/sun4i/sun4i_tcon.h
@@ -174,6 +174,8 @@ struct sun4i_tcon {
 	/* Associated crtc */
 	struct sun4i_crtc		*crtc;
 
+	int				id;
+
 	/* TCON list management */
 	struct list_head		list;
 };
-- 
2.11.0

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[PATCH v2 0/9] drm/sun4i: Support multiple display pipelines Chen-Yu Tsai <wens@csie.org> - 2017-04-21 10:40 +0200
  [PATCH v2 1/9] dt-bindings: display: sun4i: Add component endpoint ID numbering scheme Chen-Yu Tsai <wens@csie.org> - 2017-04-21 10:40 +0200
  [PATCH v2 9/9] ARM: dts: sun6i: Enable tcon0 by default Chen-Yu Tsai <wens@csie.org> - 2017-04-21 10:40 +0200
  [PATCH v2 7/9] drm/sun4i: tcon: Copy ID from associated backend Chen-Yu Tsai <wens@csie.org> - 2017-04-21 10:40 +0200
  [PATCH v2 5/9] drm/sun4i: backend: Save pointer to device tree node Chen-Yu Tsai <wens@csie.org> - 2017-04-21 10:50 +0200
  [PATCH v2 4/9] drm/sun4i: backend: Fetch backend ID from device tree Chen-Yu Tsai <wens@csie.org> - 2017-04-21 10:50 +0200
  [PATCH v2 3/9] drm/sun4i: backend: Drop trailing 0 from backend in error message Chen-Yu Tsai <wens@csie.org> - 2017-04-21 10:50 +0200
  [PATCH v2 8/9] ARM: dts: sun6i: Add second display pipeline device nodes Chen-Yu Tsai <wens@csie.org> - 2017-04-21 10:50 +0200
  [PATCH v2 6/9] drm/sun4i: tcon: Find matching display backend by device node matching Chen-Yu Tsai <wens@csie.org> - 2017-04-21 10:50 +0200
  [PATCH v2 2/9] drm/sun4i: Use lists to track registered display backends and TCONs Chen-Yu Tsai <wens@csie.org> - 2017-04-21 10:50 +0200
  Re: [PATCH v2 0/9] drm/sun4i: Support multiple display pipelines Maxime Ripard <maxime.ripard@free-electrons.com> - 2017-04-24 08:00 +0200

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