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Commit 084165a3 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'fbdev-4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux 

Pull fbdev updates from Tomi Valkeinen:
 "Main changes:

   - amba-cldc: DT backlight support, Nomadik support, Versatile
     improvements, fixes

   - efifb: fix fbcon RGB565 palette

   - exynos: remove unused DSI driver"

* tag 'fbdev-4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/tomba/linux: (42 commits)
  video: smscufx: remove unused variable
  matroxfb: fix size of memcpy
  fbdev: ssd1307fb: fix a possible NULL dereference
  fbdev: ssd1307fb: constify the device_info pointer
  simplefb: Disable and release clocks and regulators in destroy callback
  video: fbdev: constify fb_fix_screeninfo and fb_var_screeninfo structures
  matroxfb: constify local structures
  video: fbdev: i810: add in missing white space in error message text
  video: fbdev: add missing \n at end of printk error message
  ARM: exynos_defconfig: Remove old non-working MIPI driver
  video: fbdev: exynos: Remove old non-working MIPI driver
  omapfb: fix return value check in dsi_bind()
  MAINTAINERS: update fbdev entries
  video: fbdev: offb: Call pci_enable_device() before using the PCI VGA device
  fbdev: vfb: simplify memory management
  fbdev: vfb: add option for video mode
  fbdev: vfb: add description to module parameters
  video: fbdev: intelfb: remove impossible condition
  fb: adv7393: off by one in probe function
  video: fbdev: pxafb: add missing of_node_put() in of_get_pxafb_mode_info()
  ...
parents ef6000b4 c456a2f3

MAINTAINERS

+0 −12
Original line number Diff line number Diff line
@@ -4775,15 +4775,6 @@ L: iommu@lists.linux-foundation.org 
S:	Maintained

F:	drivers/iommu/exynos-iommu.c



EXYNOS MIPI DISPLAY DRIVERS

M:	Inki Dae <inki.dae@samsung.com>

M:	Donghwa Lee <dh09.lee@samsung.com>

M:	Kyungmin Park <kyungmin.park@samsung.com>

L:	linux-fbdev@vger.kernel.org

S:	Maintained

F:	drivers/video/fbdev/exynos/exynos_mipi*

F:	include/video/exynos_mipi*



EZchip NPS platform support

M:	Noam Camus <noamc@ezchip.com>

S:	Supported
@@ -4962,12 +4953,9 @@ F: drivers/net/wan/dlci.c 
F:	drivers/net/wan/sdla.c



FRAMEBUFFER LAYER

M:	Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com>

M:	Tomi Valkeinen <tomi.valkeinen@ti.com>

L:	linux-fbdev@vger.kernel.org

W:	http://linux-fbdev.sourceforge.net/

Q:	http://patchwork.kernel.org/project/linux-fbdev/list/

T:	git git://git.kernel.org/pub/scm/linux/kernel/git/plagnioj/linux-fbdev.git

S:	Maintained

F:	Documentation/fb/

F:	drivers/video/

arch/arm/configs/exynos_defconfig

+0 −2
Original line number Diff line number Diff line
@@ -168,8 +168,6 @@ CONFIG_DRM_PANEL_SAMSUNG_LD9040=y 
CONFIG_DRM_PANEL_SAMSUNG_S6E8AA0=y

CONFIG_DRM_NXP_PTN3460=y

CONFIG_DRM_PARADE_PS8622=y

CONFIG_EXYNOS_VIDEO=y

CONFIG_EXYNOS_MIPI_DSI=y

CONFIG_LCD_CLASS_DEVICE=y

CONFIG_LCD_PLATFORM=y

CONFIG_BACKLIGHT_PWM=y

drivers/video/fbdev/Kconfig

+5 −2
Original line number Diff line number Diff line
@@ -284,12 +284,14 @@ config FB_PM2_FIFO_DISCONNECT 
config FB_ARMCLCD

	tristate "ARM PrimeCell PL110 support"

	depends on ARM || ARM64 || COMPILE_TEST

	depends on FB && ARM_AMBA

	depends on FB && ARM_AMBA && HAS_IOMEM

	select FB_CFB_FILLRECT

	select FB_CFB_COPYAREA

	select FB_CFB_IMAGEBLIT

	select FB_MODE_HELPERS if OF

	select VIDEOMODE_HELPERS if OF

	select BACKLIGHT_LCD_SUPPORT if OF

	select BACKLIGHT_CLASS_DEVICE if OF

	help

	  This framebuffer device driver is for the ARM PrimeCell PL110

	  Colour LCD controller.  ARM PrimeCells provide the building
@@ -305,6 +307,8 @@ config PLAT_VERSATILE_CLCD 
	def_bool ARCH_VERSATILE || ARCH_REALVIEW || ARCH_VEXPRESS || ARCH_INTEGRATOR

	depends on ARM

	depends on FB_ARMCLCD && FB=y

	select REGMAP

	select MFD_SYSCON



config FB_ACORN

	bool "Acorn VIDC support"
@@ -2443,7 +2447,6 @@ config FB_SIMPLE 


source "drivers/video/fbdev/omap/Kconfig"

source "drivers/video/fbdev/omap2/Kconfig"

source "drivers/video/fbdev/exynos/Kconfig"

source "drivers/video/fbdev/mmp/Kconfig"



config FB_SH_MOBILE_MERAM

drivers/video/fbdev/Makefile

+1 −2
Original line number Diff line number Diff line
@@ -6,8 +6,6 @@ 


obj-y				+= core/



obj-$(CONFIG_EXYNOS_VIDEO)     += exynos/



obj-$(CONFIG_FB_MACMODES)      += macmodes.o

obj-$(CONFIG_FB_WMT_GE_ROPS)   += wmt_ge_rops.o
@@ -79,6 +77,7 @@ obj-$(CONFIG_FB_ATMEL) += atmel_lcdfb.o 
obj-$(CONFIG_FB_PVR2)             += pvr2fb.o

obj-$(CONFIG_FB_VOODOO1)          += sstfb.o

obj-$(CONFIG_FB_ARMCLCD)	  += amba-clcd.o

obj-$(CONFIG_ARCH_NOMADIK)	  += amba-clcd-nomadik.o

obj-$(CONFIG_PLAT_VERSATILE_CLCD) += amba-clcd-versatile.o

obj-$(CONFIG_FB_GOLDFISH)         += goldfishfb.o

obj-$(CONFIG_FB_68328)            += 68328fb.o

drivers/video/fbdev/amba-clcd-nomadik.c

0 → 100644
+259 −0
Original line number Diff line number Diff line 
#include <linux/amba/bus.h>

#include <linux/amba/clcd.h>

#include <linux/gpio/consumer.h>

#include <linux/of.h>

#include <linux/of_graph.h>

#include <linux/delay.h>

#include <linux/bitops.h>

#include <linux/mfd/syscon.h>

#include <linux/regmap.h>



#include "amba-clcd-nomadik.h"



static struct gpio_desc *grestb;

static struct gpio_desc *scen;

static struct gpio_desc *scl;

static struct gpio_desc *sda;



static u8 tpg110_readwrite_reg(bool write, u8 address, u8 outval)

{

	int i;

	u8 inval = 0;



	/* Assert SCEN */

	gpiod_set_value_cansleep(scen, 1);

	ndelay(150);

	/* Hammer out the address */

	for (i = 5; i >= 0; i--) {

		if (address & BIT(i))

			gpiod_set_value_cansleep(sda, 1);

		else

			gpiod_set_value_cansleep(sda, 0);

		ndelay(150);

		/* Send an SCL pulse */

		gpiod_set_value_cansleep(scl, 1);

		ndelay(160);

		gpiod_set_value_cansleep(scl, 0);

		ndelay(160);

	}



	if (write) {

		/* WRITE */

		gpiod_set_value_cansleep(sda, 0);

	} else {

		/* READ */

		gpiod_set_value_cansleep(sda, 1);

	}

	ndelay(150);

	/* Send an SCL pulse */

	gpiod_set_value_cansleep(scl, 1);

	ndelay(160);

	gpiod_set_value_cansleep(scl, 0);

	ndelay(160);



	if (!write)

		/* HiZ turn-around cycle */

		gpiod_direction_input(sda);

	ndelay(150);

	/* Send an SCL pulse */

	gpiod_set_value_cansleep(scl, 1);

	ndelay(160);

	gpiod_set_value_cansleep(scl, 0);

	ndelay(160);



	/* Hammer in/out the data */

	for (i = 7; i >= 0; i--) {

		int value;



		if (write) {

			value = !!(outval & BIT(i));

			gpiod_set_value_cansleep(sda, value);

		} else {

			value = gpiod_get_value(sda);

			if (value)

				inval |= BIT(i);

		}

		ndelay(150);

		/* Send an SCL pulse */

		gpiod_set_value_cansleep(scl, 1);

		ndelay(160);

		gpiod_set_value_cansleep(scl, 0);

		ndelay(160);

	}



	gpiod_direction_output(sda, 0);

	/* Deassert SCEN */

	gpiod_set_value_cansleep(scen, 0);

	/* Satisfies SCEN pulse width */

	udelay(1);



	return inval;

}



static u8 tpg110_read_reg(u8 address)

{

	return tpg110_readwrite_reg(false, address, 0);

}



static void tpg110_write_reg(u8 address, u8 outval)

{

	tpg110_readwrite_reg(true, address, outval);

}



static void tpg110_startup(struct device *dev)

{

	u8 val;



	dev_info(dev, "TPG110 display enable\n");

	/* De-assert the reset signal */

	gpiod_set_value_cansleep(grestb, 0);

	mdelay(1);

	dev_info(dev, "de-asserted GRESTB\n");



	/* Test display communication */

	tpg110_write_reg(0x00, 0x55);

	val = tpg110_read_reg(0x00);

	if (val == 0x55)

		dev_info(dev, "passed communication test\n");

	val = tpg110_read_reg(0x01);

	dev_info(dev, "TPG110 chip ID: %d version: %d\n",

		val>>4, val&0x0f);



	/* Show display resolution */

	val = tpg110_read_reg(0x02);

	val &= 7;

	switch (val) {

	case 0x0:

		dev_info(dev, "IN 400x240 RGB -> OUT 800x480 RGB (dual scan)");

		break;

	case 0x1:

		dev_info(dev, "IN 480x272 RGB -> OUT 800x480 RGB (dual scan)");

		break;

	case 0x4:

		dev_info(dev, "480x640 RGB");

		break;

	case 0x5:

		dev_info(dev, "480x272 RGB");

		break;

	case 0x6:

		dev_info(dev, "640x480 RGB");

		break;

	case 0x7:

		dev_info(dev, "800x480 RGB");

		break;

	default:

		dev_info(dev, "ILLEGAL RESOLUTION");

		break;

	}



	val = tpg110_read_reg(0x03);

	dev_info(dev, "resolution is controlled by %s\n",

		(val & BIT(7)) ? "software" : "hardware");

}



static void tpg110_enable(struct clcd_fb *fb)

{

	struct device *dev = &fb->dev->dev;

	static bool startup;

	u8 val;



	if (!startup) {

		tpg110_startup(dev);

		startup = true;

	}



	/* Take chip out of standby */

	val = tpg110_read_reg(0x03);

	val |= BIT(0);

	tpg110_write_reg(0x03, val);

}



static void tpg110_disable(struct clcd_fb *fb)

{

	u8 val;



	dev_info(&fb->dev->dev, "TPG110 display disable\n");

	val = tpg110_read_reg(0x03);

	/* Put into standby */

	val &= ~BIT(0);

	tpg110_write_reg(0x03, val);

}



static void tpg110_init(struct device *dev, struct device_node *np,

			struct clcd_board *board)

{

	dev_info(dev, "TPG110 display init\n");



	grestb = devm_get_gpiod_from_child(dev, "grestb", &np->fwnode);

	if (IS_ERR(grestb)) {

		dev_err(dev, "no GRESTB GPIO\n");

		return;

	}

	/* This asserts the GRESTB signal, putting the display into reset */

	gpiod_direction_output(grestb, 1);



	scen = devm_get_gpiod_from_child(dev, "scen", &np->fwnode);

	if (IS_ERR(scen)) {

		dev_err(dev, "no SCEN GPIO\n");

		return;

	}

	gpiod_direction_output(scen, 0);

	scl = devm_get_gpiod_from_child(dev, "scl", &np->fwnode);

	if (IS_ERR(scl)) {

		dev_err(dev, "no SCL GPIO\n");

		return;

	}

	gpiod_direction_output(scl, 0);

	sda = devm_get_gpiod_from_child(dev, "sda", &np->fwnode);

	if (IS_ERR(sda)) {

		dev_err(dev, "no SDA GPIO\n");

		return;

	}

	gpiod_direction_output(sda, 0);

	board->enable = tpg110_enable;

	board->disable = tpg110_disable;

}



int nomadik_clcd_init_panel(struct clcd_fb *fb,

			    struct device_node *endpoint)

{

	struct device_node *panel;



	panel = of_graph_get_remote_port_parent(endpoint);

	if (!panel)

		return -ENODEV;



	if (of_device_is_compatible(panel, "tpo,tpg110"))

		tpg110_init(&fb->dev->dev, panel, fb->board);

	else

		dev_info(&fb->dev->dev, "unknown panel\n");



	/* Unknown panel, fall through */

	return 0;

}

EXPORT_SYMBOL_GPL(nomadik_clcd_init_panel);



#define PMU_CTRL_OFFSET 0x0000

#define PMU_CTRL_LCDNDIF BIT(26)



int nomadik_clcd_init_board(struct amba_device *adev,

			    struct clcd_board *board)

{

	struct regmap *pmu_regmap;



	dev_info(&adev->dev, "Nomadik CLCD board init\n");

	pmu_regmap =

		syscon_regmap_lookup_by_compatible("stericsson,nomadik-pmu");

	if (IS_ERR(pmu_regmap)) {

		dev_err(&adev->dev, "could not find PMU syscon regmap\n");

		return PTR_ERR(pmu_regmap);

	}

	regmap_update_bits(pmu_regmap,

			   PMU_CTRL_OFFSET,

			   PMU_CTRL_LCDNDIF,

			   0);

	dev_info(&adev->dev, "set PMU mux to CLCD mode\n");



	return 0;

}

EXPORT_SYMBOL_GPL(nomadik_clcd_init_board);