Merge tag 'fbdev-v4.20' of https://github.com/bzolnier/linux

Pull fbdev updates from Bartlomiej Zolnierkiewicz:
 "No major changes to the subsystem itself, mainly fb drivers fixes &
  cleanups (atyfb & udlfb updates stand out from the rest) + removal of
  no longer needed old clps711xfb driver.

  Details:

   - update atyfb driver - improvements for ATI Mach64 chips: detect the
     dot clock divider correctly on Sparc, fix display corruptions (due
     to endianness issues and improper reading of accelerator
     registers), optimize scrolling performance and also fix debugging
     printks (Mikulas Patocka)

   - rewrite USB unplug handling in udlfb driver using framebuffer
     subsystem reference counting (Mikulas Patocka)

   - fix support for native-mode display-timings in atmel_lcdfb driver
     (Sam Ravnborg)

   - fix information leak & add missing access_ok() checks in sbuslib
     (Dan Carpenter)

   - allow using GPIO expanders that can sleep in ssd1307fb driver
     (Michal Vokáč)

   - convert omapfb driver to use GPIO descriptors instead of GPIO
     numbers for Amstrad Delta board (Janusz Krzysztofik)

   - fix broken Kconfig menu dependencies (Randy Dunlap)

   - convert fbdev subsystem to use %pOFn instead of device_node.name
     (Rob Herring)

   - remove the dead old CLPS711x LCD support driver (the new CLPS711x
     LCD support driver is still available)

   - misc fixes (Jia-Ju Bai, Gustavo A. R. Silva)

   - misc cleanups (Mehdi Bounya, Nathan Chancellor, YueHaibing)"

* tag 'fbdev-v4.20' of https://github.com/bzolnier/linux: (22 commits)
  video: fbdev: remove redundant 'default n' from Kconfig-s
  video: fbdev: remove dead old CLPS711x LCD support driver
  Revert "video: ssd1307fb: Do not hard code active-low reset sequence"
  video: fbdev: arcfb: mark expected switch fall-through
  pxa168fb: remove set but not used variables 'mi'
  video: ssd1307fb: Do not hard code active-low reset sequence
  video: ssd1307fb: Use gpiod_set_value_cansleep() for reset
  fbdev: fix broken menu dependencies
  video: fbdev: sis: Remove unnecessary parentheses and commented code
  video: fbdev: omapfb: lcd_ams_delta: use GPIO lookup table
  fbdev: sbuslib: integer overflow in sbusfb_ioctl_helper()
  fbdev: sbuslib: use checked version of put_user()
  fbdev: Convert to using %pOFn instead of device_node.name
  atmel_lcdfb: support native-mode display-timings
  Video: vgastate: fixed a spacing coding style
  atyfb: fix debugging printks
  mach64: optimize wait_for_fifo
  mach64: fix image corruption due to reading accelerator registers
  mach64: fix display corruption on big endian machines
  mach64: detect the dot clock divider correctly on sparc
  ...

drivers/video/fbdev/Kconfig

@@ -2,6 +2,12 @@
 # fbdev configuration
 #
 
+config FB_CMDLINE
+	bool
+
+config FB_NOTIFY
+	bool
+
 menuconfig FB
 	tristate "Support for frame buffer devices"
 	select FB_CMDLINE
@@ -41,7 +47,6 @@ menuconfig FB
 config FIRMWARE_EDID
        bool "Enable firmware EDID"
        depends on FB
-       default n
        ---help---
          This enables access to the EDID transferred from the firmware.
 	 On the i386, this is from the Video BIOS. Enable this if DDC/I2C
@@ -54,31 +59,22 @@ config FIRMWARE_EDID
 	 combination with certain motherboards and monitors are known to
 	 suffer from this problem.
 
-config FB_CMDLINE
-	bool
-
-config FB_NOTIFY
-	bool
-
 config FB_DDC
        tristate
        depends on FB
        select I2C_ALGOBIT
        select I2C
-       default n
 
 config FB_BOOT_VESA_SUPPORT
 	bool
 	depends on FB
-	default n
 	---help---
 	  If true, at least one selected framebuffer driver can take advantage
 	  of VESA video modes set at an early boot stage via the vga= parameter.
 
 config FB_CFB_FILLRECT
 	tristate
 	depends on FB
-	default n
 	---help---
 	  Include the cfb_fillrect function for generic software rectangle
 	  filling. This is used by drivers that don't provide their own
@@ -87,7 +83,6 @@ config FB_CFB_FILLRECT
 config FB_CFB_COPYAREA
 	tristate
 	depends on FB
-	default n
 	---help---
 	  Include the cfb_copyarea function for generic software area copying.
 	  This is used by drivers that don't provide their own (accelerated)
@@ -96,7 +91,6 @@ config FB_CFB_COPYAREA
 config FB_CFB_IMAGEBLIT
 	tristate
 	depends on FB
-	default n
 	---help---
 	  Include the cfb_imageblit function for generic software image
 	  blitting. This is used by drivers that don't provide their own
@@ -105,7 +99,6 @@ config FB_CFB_IMAGEBLIT
 config FB_CFB_REV_PIXELS_IN_BYTE
 	bool
 	depends on FB
-	default n
 	---help---
 	  Allow generic frame-buffer functions to work on displays with 1, 2
 	  and 4 bits per pixel depths which has opposite order of pixels in
@@ -114,7 +107,6 @@ config FB_CFB_REV_PIXELS_IN_BYTE
 config FB_SYS_FILLRECT
 	tristate
 	depends on FB
-	default n
 	---help---
 	  Include the sys_fillrect function for generic software rectangle
 	  filling. This is used by drivers that don't provide their own
@@ -123,7 +115,6 @@ config FB_SYS_FILLRECT
 config FB_SYS_COPYAREA
 	tristate
 	depends on FB
-	default n
 	---help---
 	  Include the sys_copyarea function for generic software area copying.
 	  This is used by drivers that don't provide their own (accelerated)
@@ -132,7 +123,6 @@ config FB_SYS_COPYAREA
 config FB_SYS_IMAGEBLIT
 	tristate
 	depends on FB
-	default n
 	---help---
 	  Include the sys_imageblit function for generic software image
 	  blitting. This is used by drivers that don't provide their own
@@ -141,7 +131,6 @@ config FB_SYS_IMAGEBLIT
 config FB_PROVIDE_GET_FB_UNMAPPED_AREA
 	bool
 	depends on FB
-	default n
 	---help---
 	  Allow generic frame-buffer to provide get_fb_unmapped_area
 	  function.
@@ -173,7 +162,6 @@ endchoice
 config FB_SYS_FOPS
        tristate
        depends on FB
-       default n
 
 config FB_DEFERRED_IO
 	bool
@@ -187,27 +175,23 @@ config FB_HECUBA
 config FB_SVGALIB
 	tristate
 	depends on FB
-	default n
 	---help---
 	  Common utility functions useful to fbdev drivers of VGA-based
 	  cards.
 
 config FB_MACMODES
        tristate
        depends on FB
-       default n
 
 config FB_BACKLIGHT
 	bool
 	depends on FB
 	select BACKLIGHT_LCD_SUPPORT
 	select BACKLIGHT_CLASS_DEVICE
-	default n
 
 config FB_MODE_HELPERS
         bool "Enable Video Mode Handling Helpers"
         depends on FB
-	default n
 	---help---
 	  This enables functions for handling video modes using the
 	  Generalized Timing Formula and the EDID parser. A few drivers rely
@@ -218,7 +202,6 @@ config FB_MODE_HELPERS
 config FB_TILEBLITTING
        bool "Enable Tile Blitting Support"
        depends on FB
-       default n
        ---help---
          This enables tile blitting.  Tile blitting is a drawing technique
 	 where the screen is divided into rectangular sections (tiles), whereas
@@ -329,16 +312,9 @@ config FB_ACORN
 	  hardware found in Acorn RISC PCs and other ARM-based machines.  If
 	  unsure, say N.
 
-config FB_CLPS711X_OLD
-	tristate
-	select FB_CFB_FILLRECT
-	select FB_CFB_COPYAREA
-	select FB_CFB_IMAGEBLIT
-
 config FB_CLPS711X
 	tristate "CLPS711X LCD support"
 	depends on FB && (ARCH_CLPS711X || COMPILE_TEST)
-	select FB_CLPS711X_OLD if ARCH_CLPS711X && !ARCH_MULTIPLATFORM
 	select BACKLIGHT_LCD_SUPPORT
 	select FB_MODE_HELPERS
 	select FB_SYS_FILLRECT
@@ -936,7 +912,6 @@ config FB_NVIDIA_I2C
 config FB_NVIDIA_DEBUG
 	bool "Lots of debug output"
 	depends on FB_NVIDIA
-	default n
 	help
 	  Say Y here if you want the nVidia driver to output all sorts
 	  of debugging information to provide to the maintainer when
@@ -983,7 +958,6 @@ config FB_RIVA_I2C
 config FB_RIVA_DEBUG
 	bool "Lots of debug output"
 	depends on FB_RIVA
-	default n
 	help
 	  Say Y here if you want the Riva driver to output all sorts
 	  of debugging information to provide to the maintainer when
@@ -1266,7 +1240,6 @@ config FB_RADEON_BACKLIGHT
 config FB_RADEON_DEBUG
 	bool "Lots of debug output from Radeon driver"
 	depends on FB_RADEON
-	default n
 	help
 	  Say Y here if you want the Radeon driver to output all sorts
 	  of debugging information to provide to the maintainer when
@@ -1399,7 +1372,6 @@ config FB_SAVAGE_I2C
 config FB_SAVAGE_ACCEL
        bool "Enable Console Acceleration"
        depends on FB_SAVAGE
-       default n
        help
           This option will compile in console acceleration support. If
           the resulting framebuffer console has bothersome glitches, then
@@ -1456,8 +1428,6 @@ if FB_VIA
 
 config FB_VIA_DIRECT_PROCFS
 	bool "direct hardware access via procfs (DEPRECATED)(DANGEROUS)"
-	depends on FB_VIA
-	default n
 	help
 	  Allow direct hardware access to some output registers via procfs.
 	  This is dangerous but may provide the only chance to get the
@@ -1466,8 +1436,6 @@ config FB_VIA_DIRECT_PROCFS
 
 config FB_VIA_X_COMPATIBILITY
 	bool "X server compatibility"
-	depends on FB_VIA
-	default n
 	help
 	  This option reduces the functionality (power saving, ...) of the
 	  framebuffer to avoid negative impact on the OpenChrome X server.
@@ -1692,7 +1660,6 @@ config FB_WM8505
 config FB_WMT_GE_ROPS
 	bool "VT8500/WM8xxx accelerated raster ops support"
 	depends on (FB = y) && (FB_VT8500 || FB_WM8505)
-	default n
 	help
 	  This adds support for accelerated raster operations on the
 	  VIA VT8500 and Wondermedia 85xx series SoCs.
@@ -1802,17 +1769,14 @@ config FB_PXA
 
 config FB_PXA_OVERLAY
 	bool "Support PXA27x/PXA3xx Overlay(s) as framebuffer"
-	default n
 	depends on FB_PXA && (PXA27x || PXA3xx)
 
 config FB_PXA_SMARTPANEL
 	bool "PXA Smartpanel LCD support"
-	default n
 	depends on FB_PXA
 
 config FB_PXA_PARAMETERS
 	bool "PXA LCD command line parameters"
-	default n
 	depends on FB_PXA
 	---help---
 	  Enable the use of kernel command line or module parameters
@@ -1850,7 +1814,6 @@ config FB_MBX
 config FB_MBX_DEBUG
        bool "Enable debugging info via debugfs"
        depends on FB_MBX && DEBUG_FS
-       default n
        ---help---
          Enable this if you want debugging information using the debug
          filesystem (debugfs)
@@ -2240,7 +2203,7 @@ config FB_MX3
 
 config FB_BROADSHEET
 	tristate "E-Ink Broadsheet/Epson S1D13521 controller support"
-	depends on FB
+	depends on FB && (ARCH_PXA || COMPILE_TEST)
 	select FB_SYS_FILLRECT
 	select FB_SYS_COPYAREA
 	select FB_SYS_IMAGEBLIT
@@ -2308,10 +2271,6 @@ config FB_SIMPLE
 	  Configuration re: surface address, size, and format must be provided
 	  through device tree, or plain old platform data.
 
-source "drivers/video/fbdev/omap/Kconfig"
-source "drivers/video/fbdev/omap2/Kconfig"
-source "drivers/video/fbdev/mmp/Kconfig"
-
 config FB_SSD1307
 	tristate "Solomon SSD1307 framebuffer support"
 	depends on FB && I2C
@@ -2341,3 +2300,7 @@ config FB_SM712
 	  This driver is also available as a module. The module will be
 	  called sm712fb. If you want to compile it as a module, say M
 	  here and read <file:Documentation/kbuild/modules.txt>.
+
+source "drivers/video/fbdev/omap/Kconfig"
+source "drivers/video/fbdev/omap2/Kconfig"
+source "drivers/video/fbdev/mmp/Kconfig"

drivers/video/fbdev/Makefile

@@ -14,7 +14,6 @@ obj-$(CONFIG_FB_WMT_GE_ROPS)   += wmt_ge_rops.o
 obj-$(CONFIG_FB_AMIGA)            += amifb.o c2p_planar.o
 obj-$(CONFIG_FB_ARC)              += arcfb.o
 obj-$(CONFIG_FB_CLPS711X)	  += clps711x-fb.o
-obj-$(CONFIG_FB_CLPS711X_OLD)	  += clps711xfb.o
 obj-$(CONFIG_FB_CYBER2000)        += cyber2000fb.o
 obj-$(CONFIG_FB_GRVGA)            += grvga.o
 obj-$(CONFIG_FB_PM2)              += pm2fb.o

drivers/video/fbdev/arcfb.c

@@ -419,6 +419,8 @@ static int arcfb_ioctl(struct fb_info *info,
 			schedule();
 			finish_wait(&arcfb_waitq, &wait);
 		}
+		/* fall through */
+
 		case FBIO_GETCONTROL2:
 		{
 			unsigned char ctl2;

drivers/video/fbdev/atmel_lcdfb.c

@@ -22,6 +22,7 @@
 #include <linux/module.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
+#include <video/of_videomode.h>
 #include <video/of_display_timing.h>
 #include <linux/regulator/consumer.h>
 #include <video/videomode.h>
@@ -1028,11 +1029,11 @@ static int atmel_lcdfb_of_init(struct atmel_lcdfb_info *sinfo)
 	struct device *dev = &sinfo->pdev->dev;
 	struct device_node *np =dev->of_node;
 	struct device_node *display_np;
-	struct device_node *timings_np;
-	struct display_timings *timings;
 	struct atmel_lcdfb_power_ctrl_gpio *og;
 	bool is_gpio_power = false;
+	struct fb_videomode fb_vm;
 	struct gpio_desc *gpiod;
+	struct videomode vm;
 	int ret = -ENOENT;
 	int i;
 
@@ -1105,44 +1106,18 @@ static int atmel_lcdfb_of_init(struct atmel_lcdfb_info *sinfo)
 	pdata->lcdcon_is_backlight = of_property_read_bool(display_np, "atmel,lcdcon-backlight");
 	pdata->lcdcon_pol_negative = of_property_read_bool(display_np, "atmel,lcdcon-backlight-inverted");
 
-	timings = of_get_display_timings(display_np);
-	if (!timings) {
-		dev_err(dev, "failed to get display timings\n");
-		ret = -EINVAL;
+	ret = of_get_videomode(display_np, &vm, OF_USE_NATIVE_MODE);
+	if (ret) {
+		dev_err(dev, "failed to get videomode from DT\n");
 		goto put_display_node;
 	}
 
-	timings_np = of_get_child_by_name(display_np, "display-timings");
-	if (!timings_np) {
-		dev_err(dev, "failed to find display-timings node\n");
-		ret = -ENODEV;
+	ret = fb_videomode_from_videomode(&vm, &fb_vm);
+	if (ret < 0)
 		goto put_display_node;
-	}
 
-	for (i = 0; i < of_get_child_count(timings_np); i++) {
-		struct videomode vm;
-		struct fb_videomode fb_vm;
-
-		ret = videomode_from_timings(timings, &vm, i);
-		if (ret < 0)
-			goto put_timings_node;
-		ret = fb_videomode_from_videomode(&vm, &fb_vm);
-		if (ret < 0)
-			goto put_timings_node;
-
-		fb_add_videomode(&fb_vm, &info->modelist);
-	}
-
-	/*
-	 * FIXME: Make sure we are not referencing any fields in display_np
-	 * and timings_np and drop our references to them before returning to
-	 * avoid leaking the nodes on probe deferral and driver unbind.
-	 */
-
-	return 0;
+	fb_add_videomode(&fb_vm, &info->modelist);
 
-put_timings_node:
-	of_node_put(timings_np);
 put_display_node:
 	of_node_put(display_np);
 	return ret;