BACKPORT: drm: imx: Move imx-drm driver out of staging

The imx-drm driver was put into staging mostly for the following reasons,
all of which have been addressed or superseded:
 - convert the irq driver to use linear irq domains
 - work out the device tree bindings, this lead to the common of_graph
   bindings being used
 - factor out common helper functions, this mostly resulted in the
   component framework and drm of_graph helpers.

Before adding new fixes, and certainly before adding new features,
move it into its proper place below drivers/gpu/drm.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Dave Airlie <airlied@redhat.com>
(cherry picked from commit 6556f7f82b)
Signed-off-by: Andy Yan <andy.yan@rock-chips.com>
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>

[djkurtz: all trivial changes: ignoring other new drm drivers, and other
 drivers already removed from staging]

BUG=chrome-os-partner:33478
TEST=compile tested on rush_ryu, samus, veyron_pinky

Change-Id: I106bb70b83a6e5b493f0ab35db3a964d619403c6
Reviewed-on: https://chromium-review.googlesource.com/233807
Reviewed-by: Daniel Kurtz <djkurtz@chromium.org>
Tested-by: Daniel Kurtz <djkurtz@chromium.org>
Commit-Queue: Daniel Kurtz <djkurtz@chromium.org>
Trybot-Ready: Daniel Kurtz <djkurtz@chromium.org>

drivers/gpu/drm/Kconfig

@@ -219,3 +219,5 @@ source "drivers/gpu/drm/msm/Kconfig"
 source "drivers/gpu/drm/tegra/Kconfig"
 
 source "drivers/gpu/drm/panel/Kconfig"
+
+source "drivers/gpu/drm/imx/Kconfig"

drivers/gpu/drm/Makefile

@@ -66,6 +66,7 @@ obj-$(CONFIG_DRM_QXL) += qxl/
 obj-$(CONFIG_DRM_BOCHS) += bochs/
 obj-$(CONFIG_DRM_MSM) += msm/
 obj-$(CONFIG_DRM_TEGRA) += tegra/
+obj-$(CONFIG_DRM_IMX) += imx/
 obj-y			+= i2c/
 obj-y			+= panel/
 obj-y			+= bridge/

drivers/staging/Kconfig

@@ -124,8 +124,6 @@ source "drivers/staging/silicom/Kconfig"
 
 source "drivers/staging/ced1401/Kconfig"
 
-source "drivers/staging/imx-drm/Kconfig"
-
 source "drivers/staging/dgrp/Kconfig"
 
 source "drivers/staging/sb105x/Kconfig"

drivers/staging/Makefile

@@ -55,7 +55,6 @@ obj-$(CONFIG_WIMAX_GDM72XX)	+= gdm72xx/
 obj-$(CONFIG_LTE_GDM724X)	+= gdm724x/
 obj-$(CONFIG_NET_VENDOR_SILICOM)	+= silicom/
 obj-$(CONFIG_CED1401)		+= ced1401/
-obj-$(CONFIG_DRM_IMX)		+= imx-drm/
 obj-$(CONFIG_DGRP)		+= dgrp/
 obj-$(CONFIG_SB105X)		+= sb105x/
 obj-$(CONFIG_FIREWIRE_SERIAL)	+= fwserial/

drivers/staging/imx-drm/TODO

@@ -1,17 +0,0 @@
-TODO:
-- get DRM Maintainer review for this code
-- decide where to put the base driver. It is not specific to a subsystem
-  and would be used by DRM/KMS and media/V4L2
-
-Missing features (not necessarily for moving out of staging):
-
-- Add support for IC (Image converter)
-- Add support for CSI (CMOS Sensor interface)
-- Add support for VDIC (Video Deinterlacer)
-
-Many work-in-progress patches for the above features exist. Contact
-Sascha Hauer <kernel@pengutronix.de> if you are interested in working
-on a specific feature.
-
-Please send any patches to Greg Kroah-Hartman <gregkh@linuxfoundation.org> and
-Sascha Hauer <kernel@pengutronix.de>