Merge tag 'drm-fsl-dcu-for-next' of http://git.agner.ch/git/linux-drm-fsl-dcu into drm-next

Some fixes and cleanup, mainly around fbdev emulation. It also adds a
new module parameter which allows to specify the color depth/bpp for
the fbdev emulation (like the IMX DRM driver).

* tag 'drm-fsl-dcu-for-next' of http://git.agner.ch/git/linux-drm-fsl-dcu:
  drm/fsl-dcu: introduce kernel parameter to specify fbdev depth
  drm/fsl-dcu: remove separate compilation unit for fbdev emulation
  drm/fsl-dcu: Propagate the real error code
  drm/fsl-dcu: Remove unneeded NULL check
  drm/fsl-dcu: disable outputs before unloading driver
  drm/fsl-dcu: unload driver before disabling clocks

drivers/gpu/drm/fsl-dcu/Makefile

@@ -3,6 +3,5 @@ fsl-dcu-drm-y := fsl_dcu_drm_drv.o \
 		 fsl_dcu_drm_rgb.o \
 		 fsl_dcu_drm_plane.o \
 		 fsl_dcu_drm_crtc.o \
-		 fsl_dcu_drm_fbdev.o \
 		 fsl_tcon.o
 obj-$(CONFIG_DRM_FSL_DCU)	+= fsl-dcu-drm.o

drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c

@@ -32,6 +32,9 @@
 #include "fsl_dcu_drm_drv.h"
 #include "fsl_tcon.h"
 
+static int legacyfb_depth = 24;
+module_param(legacyfb_depth, int, 0444);
+
 static bool fsl_dcu_drm_is_volatile_reg(struct device *dev, unsigned int reg)
 {
 	if (reg == DCU_INT_STATUS || reg == DCU_UPDATE_MODE)
@@ -85,7 +88,18 @@ static int fsl_dcu_load(struct drm_device *dev, unsigned long flags)
 		goto done;
 	dev->irq_enabled = true;
 
-	fsl_dcu_fbdev_init(dev);
+	if (legacyfb_depth != 16 && legacyfb_depth != 24 &&
+	    legacyfb_depth != 32) {
+		dev_warn(dev->dev,
+			"Invalid legacyfb_depth.  Defaulting to 24bpp\n");
+		legacyfb_depth = 24;
+	}
+	fsl_dev->fbdev = drm_fbdev_cma_init(dev, legacyfb_depth, 1, 1);
+	if (IS_ERR(fsl_dev->fbdev)) {
+		ret = PTR_ERR(fsl_dev->fbdev);
+		fsl_dev->fbdev = NULL;
+		goto done;
+	}
 
 	return 0;
 done:
@@ -106,6 +120,7 @@ static int fsl_dcu_unload(struct drm_device *dev)
 {
 	struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
 
+	drm_crtc_force_disable_all(dev);
 	drm_kms_helper_poll_fini(dev);
 
 	if (fsl_dev->fbdev)
@@ -332,11 +347,6 @@ static int fsl_dcu_drm_probe(struct platform_device *pdev)
 	fsl_dev->soc = id->data;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(dev, "could not get memory IO resource\n");
-		return -ENODEV;
-	}
-
 	base = devm_ioremap_resource(dev, res);
 	if (IS_ERR(base)) {
 		ret = PTR_ERR(base);
@@ -346,7 +356,7 @@ static int fsl_dcu_drm_probe(struct platform_device *pdev)
 	fsl_dev->irq = platform_get_irq(pdev, 0);
 	if (fsl_dev->irq < 0) {
 		dev_err(dev, "failed to get irq\n");
-		return -ENXIO;
+		return fsl_dev->irq;
 	}
 
 	fsl_dev->regmap = devm_regmap_init_mmio(dev, base,
@@ -424,9 +434,9 @@ static int fsl_dcu_drm_remove(struct platform_device *pdev)
 {
 	struct fsl_dcu_drm_device *fsl_dev = platform_get_drvdata(pdev);
 
+	drm_put_dev(fsl_dev->drm);
 	clk_disable_unprepare(fsl_dev->clk);
 	clk_unregister(fsl_dev->pix_clk);
-	drm_put_dev(fsl_dev->drm);
 
 	return 0;
 }

drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.h

@@ -197,7 +197,6 @@ struct fsl_dcu_drm_device {
 	struct drm_atomic_state *state;
 };
 
-void fsl_dcu_fbdev_init(struct drm_device *dev);
 int fsl_dcu_drm_modeset_init(struct fsl_dcu_drm_device *fsl_dev);
 
 #endif /* __FSL_DCU_DRM_DRV_H__ */

drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_fbdev.c

-/*
- * Copyright 2015 Freescale Semiconductor, Inc.
- *
- * Freescale DCU drm device driver
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#include <drm/drmP.h>
-#include <drm/drm_fb_cma_helper.h>
-
-#include "fsl_dcu_drm_drv.h"
-
-/* initialize fbdev helper */
-void fsl_dcu_fbdev_init(struct drm_device *dev)
-{
-	struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev->dev);
-
-	fsl_dev->fbdev = drm_fbdev_cma_init(dev, 24, 1, 1);
-}