imx-drm module/dependency changes

- The PRE/PRG drivers added an unwanted DRM dependency to the ipu-v3 driver.
   Remove the dependency by conditionally disabling PRE/PRG support depending
   on CONFIG_DRM.
 - Merge the imx-ipuv3-crtc module into the imxdrm module. There is no reason
   anymore for a separation between core drm driver and crtc/plane drivers,
   especially since commit eb8c88808c ("drm/imx: add deferred plane
   disabling"), which added a dependency on imx-ipuv3-crtc to the imxdrm
   module.
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Merge tag 'imx-drm-next-2017-04-04' of git://git.pengutronix.de/git/pza/linux into drm-next

imx-drm module/dependency changes

- The PRE/PRG drivers added an unwanted DRM dependency to the ipu-v3 driver.
  Remove the dependency by conditionally disabling PRE/PRG support depending
  on CONFIG_DRM.
- Merge the imx-ipuv3-crtc module into the imxdrm module. There is no reason
  anymore for a separation between core drm driver and crtc/plane drivers,
  especially since commit eb8c88808c ("drm/imx: add deferred plane
  disabling"), which added a dependency on imx-ipuv3-crtc to the imxdrm
  module.

* tag 'imx-drm-next-2017-04-04' of git://git.pengutronix.de/git/pza/linux:
  drm/imx: merge imx-drm-core and ipuv3-crtc in one module
  gpu: ipu-v3: don't depend on DRM being enabled

drivers/gpu/drm/imx/Kconfig

@@ -31,13 +31,6 @@ config DRM_IMX_LDB
 	  Choose this to enable the internal LVDS Display Bridge (LDB)
 	  found on i.MX53 and i.MX6 processors.
 
-config DRM_IMX_IPUV3
-	tristate
-	depends on DRM_IMX
-	depends on IMX_IPUV3_CORE
-	default y if DRM_IMX=y
-	default m if DRM_IMX=m
-
 config DRM_IMX_HDMI
 	tristate "Freescale i.MX DRM HDMI"
 	select DRM_DW_HDMI

drivers/gpu/drm/imx/Makefile

@@ -1,5 +1,5 @@
 
-imxdrm-objs := imx-drm-core.o
+imxdrm-objs := imx-drm-core.o ipuv3-crtc.o ipuv3-plane.o
 
 obj-$(CONFIG_DRM_IMX) += imxdrm.o
 
@@ -7,6 +7,5 @@ obj-$(CONFIG_DRM_IMX_PARALLEL_DISPLAY) += parallel-display.o
 obj-$(CONFIG_DRM_IMX_TVE) += imx-tve.o
 obj-$(CONFIG_DRM_IMX_LDB) += imx-ldb.o
 
-imx-ipuv3-crtc-objs  := ipuv3-crtc.o ipuv3-plane.o
 obj-$(CONFIG_DRM_IMX_IPUV3)	+= imx-ipuv3-crtc.o
 obj-$(CONFIG_DRM_IMX_HDMI) += dw_hdmi-imx.o

drivers/gpu/drm/imx/imx-drm-core.c

@@ -422,7 +422,23 @@ static struct platform_driver imx_drm_pdrv = {
 		.of_match_table = imx_drm_dt_ids,
 	},
 };
-module_platform_driver(imx_drm_pdrv);
+
+static struct platform_driver * const drivers[] = {
+	&imx_drm_pdrv,
+	&ipu_drm_driver,
+};
+
+static int __init imx_drm_init(void)
+{
+	return platform_register_drivers(drivers, ARRAY_SIZE(drivers));
+}
+module_init(imx_drm_init);
+
+static void __exit imx_drm_exit(void)
+{
+	platform_unregister_drivers(drivers, ARRAY_SIZE(drivers));
+}
+module_exit(imx_drm_exit);
 
 MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
 MODULE_DESCRIPTION("i.MX drm driver core");

drivers/gpu/drm/imx/imx-drm.h

@@ -29,6 +29,8 @@ int imx_drm_init_drm(struct platform_device *pdev,
 		int preferred_bpp);
 int imx_drm_exit_drm(void);
 
+extern struct platform_driver ipu_drm_driver;
+
 void imx_drm_mode_config_init(struct drm_device *drm);
 
 struct drm_gem_cma_object *imx_drm_fb_get_obj(struct drm_framebuffer *fb);

drivers/gpu/drm/imx/ipuv3-crtc.c

@@ -465,16 +465,10 @@ static int ipu_drm_remove(struct platform_device *pdev)
 	return 0;
 }
 
-static struct platform_driver ipu_drm_driver = {
+struct platform_driver ipu_drm_driver = {
 	.driver = {
 		.name = "imx-ipuv3-crtc",
 	},
 	.probe = ipu_drm_probe,
 	.remove = ipu_drm_remove,
 };
-module_platform_driver(ipu_drm_driver);
-
-MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
-MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:imx-ipuv3-crtc");

drivers/gpu/ipu-v3/Makefile

@@ -2,4 +2,8 @@ obj-$(CONFIG_IMX_IPUV3_CORE) += imx-ipu-v3.o
 
 imx-ipu-v3-objs := ipu-common.o ipu-cpmem.o ipu-csi.o ipu-dc.o ipu-di.o \
 		ipu-dp.o ipu-dmfc.o ipu-ic.o ipu-image-convert.o \
-		ipu-pre.o ipu-prg.o ipu-smfc.o ipu-vdi.o
+		ipu-smfc.o ipu-vdi.o
+
+ifdef CONFIG_DRM
+	imx-ipu-v3-objs += ipu-pre.o ipu-prg.o
+endif

drivers/gpu/ipu-v3/ipu-common.c

@@ -1401,7 +1401,8 @@ static int ipu_probe(struct platform_device *pdev)
 
 	ipu->id = of_alias_get_id(np, "ipu");
 
-	if (of_device_is_compatible(np, "fsl,imx6qp-ipu")) {
+	if (of_device_is_compatible(np, "fsl,imx6qp-ipu") &&
+	    IS_ENABLED(CONFIG_DRM)) {
 		ipu->prg_priv = ipu_prg_lookup_by_phandle(&pdev->dev,
 							  "fsl,prg", ipu->id);
 		if (!ipu->prg_priv)
@@ -1538,8 +1539,10 @@ static struct platform_driver imx_ipu_driver = {
 };
 
 static struct platform_driver * const drivers[] = {
+#if IS_ENABLED(CONFIG_DRM)
 	&ipu_pre_drv,
 	&ipu_prg_drv,
+#endif
 	&imx_ipu_driver,
 };