diff options
Diffstat (limited to 'drivers/video')
| -rw-r--r-- | drivers/video/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/video/backlight/Kconfig | 7 | ||||
| -rw-r--r-- | drivers/video/backlight/Makefile | 1 | ||||
| -rw-r--r-- | drivers/video/backlight/pwm_bl.c | 185 | ||||
| -rw-r--r-- | drivers/video/fb_ddc.c | 1 | ||||
| -rw-r--r-- | drivers/video/fb_defio.c | 20 | ||||
| -rw-r--r-- | drivers/video/fbmem.c | 15 | ||||
| -rw-r--r-- | drivers/video/intelfb/intelfb_i2c.c | 12 | ||||
| -rw-r--r-- | drivers/video/matrox/i2c-matroxfb.c | 20 | ||||
| -rw-r--r-- | drivers/video/platinumfb.c | 4 | ||||
| -rw-r--r-- | drivers/video/pxafb.c | 44 |
11 files changed, 293 insertions, 18 deletions
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig index e0c5f96b273d..9b887ef64ff1 100644 --- a/drivers/video/Kconfig +++ b/drivers/video/Kconfig @@ -7,7 +7,7 @@ menu "Graphics support" source "drivers/char/agp/Kconfig" -source "drivers/char/drm/Kconfig" +source "drivers/gpu/drm/Kconfig" config VGASTATE tristate diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig index dcd8073c2369..30bf7f2f1635 100644 --- a/drivers/video/backlight/Kconfig +++ b/drivers/video/backlight/Kconfig @@ -112,3 +112,10 @@ config BACKLIGHT_CARILLO_RANCH help If you have a Intel LE80578 (Carillo Ranch) say Y to enable the backlight driver. + +config BACKLIGHT_PWM + tristate "Generic PWM based Backlight Driver" + depends on BACKLIGHT_CLASS_DEVICE && HAVE_PWM + help + If you have a LCD backlight adjustable by PWM, say Y to enable + this driver. diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile index 33f6c7cecc73..b51a7cd12500 100644 --- a/drivers/video/backlight/Makefile +++ b/drivers/video/backlight/Makefile @@ -10,3 +10,4 @@ obj-$(CONFIG_BACKLIGHT_LOCOMO) += locomolcd.o obj-$(CONFIG_BACKLIGHT_OMAP1) += omap1_bl.o obj-$(CONFIG_BACKLIGHT_PROGEAR) += progear_bl.o obj-$(CONFIG_BACKLIGHT_CARILLO_RANCH) += cr_bllcd.o +obj-$(CONFIG_BACKLIGHT_PWM) += pwm_bl.o diff --git a/drivers/video/backlight/pwm_bl.c b/drivers/video/backlight/pwm_bl.c new file mode 100644 index 000000000000..6338d0e2fe07 --- /dev/null +++ b/drivers/video/backlight/pwm_bl.c @@ -0,0 +1,185 @@ +/* + * linux/drivers/video/backlight/pwm_bl.c + * + * simple PWM based backlight control, board code has to setup + * 1) pin configuration so PWM waveforms can output + * 2) platform_data casts to the PWM id (0/1/2/3 on PXA) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/platform_device.h> +#include <linux/fb.h> +#include <linux/backlight.h> +#include <linux/err.h> +#include <linux/pwm.h> +#include <linux/pwm_backlight.h> + +struct pwm_bl_data { + struct pwm_device *pwm; + unsigned int period; + int (*notify)(int brightness); +}; + +static int pwm_backlight_update_status(struct backlight_device *bl) +{ + struct pwm_bl_data *pb = dev_get_drvdata(&bl->dev); + int brightness = bl->props.brightness; + int max = bl->props.max_brightness; + + if (bl->props.power != FB_BLANK_UNBLANK) + brightness = 0; + + if (bl->props.fb_blank != FB_BLANK_UNBLANK) + brightness = 0; + + if (pb->notify) + brightness = pb->notify(brightness); + + if (brightness == 0) { + pwm_config(pb->pwm, 0, pb->period); + pwm_disable(pb->pwm); + } else { + pwm_config(pb->pwm, brightness * pb->period / max, pb->period); + pwm_enable(pb->pwm); + } + return 0; +} + +static int pwm_backlight_get_brightness(struct backlight_device *bl) +{ + return bl->props.brightness; +} + +static struct backlight_ops pwm_backlight_ops = { + .update_status = pwm_backlight_update_status, + .get_brightness = pwm_backlight_get_brightness, +}; + +static int pwm_backlight_probe(struct platform_device *pdev) +{ + struct platform_pwm_backlight_data *data = pdev->dev.platform_data; + struct backlight_device *bl; + struct pwm_bl_data *pb; + int ret; + + if (!data) + return -EINVAL; + + if (data->init) { + ret = data->init(&pdev->dev); + if (ret < 0) + return ret; + } + + pb = kzalloc(sizeof(*pb), GFP_KERNEL); + if (!pb) { + ret = -ENOMEM; + goto err_alloc; + } + + pb->period = data->pwm_period_ns; + pb->notify = data->notify; + + pb->pwm = pwm_request(data->pwm_id, "backlight"); + if (IS_ERR(pb->pwm)) { + dev_err(&pdev->dev, "unable to request PWM for backlight\n"); + ret = PTR_ERR(pb->pwm); + goto err_pwm; + } + + bl = backlight_device_register(pdev->name, &pdev->dev, + pb, &pwm_backlight_ops); + if (IS_ERR(bl)) { + dev_err(&pdev->dev, "failed to register backlight\n"); + ret = PTR_ERR(bl); + goto err_bl; + } + + bl->props.max_brightness = data->max_brightness; + bl->props.brightness = data->dft_brightness; + backlight_update_status(bl); + + platform_set_drvdata(pdev, bl); + return 0; + +err_bl: + pwm_free(pb->pwm); +err_pwm: + kfree(pb); +err_alloc: + if (data->exit) + data->exit(&pdev->dev); + return ret; +} + +static int pwm_backlight_remove(struct platform_device *pdev) +{ + struct platform_pwm_backlight_data *data = pdev->dev.platform_data; + struct backlight_device *bl = platform_get_drvdata(pdev); + struct pwm_bl_data *pb = dev_get_drvdata(&bl->dev); + + backlight_device_unregister(bl); + pwm_config(pb->pwm, 0, pb->period); + pwm_disable(pb->pwm); + pwm_free(pb->pwm); + kfree(pb); + if (data->exit) + data->exit(&pdev->dev); + return 0; +} + +#ifdef CONFIG_PM +static int pwm_backlight_suspend(struct platform_device *pdev, + pm_message_t state) +{ + struct backlight_device *bl = platform_get_drvdata(pdev); + struct pwm_bl_data *pb = dev_get_drvdata(&bl->dev); + + pwm_config(pb->pwm, 0, pb->period); + pwm_disable(pb->pwm); + return 0; +} + +static int pwm_backlight_resume(struct platform_device *pdev) +{ + struct backlight_device *bl = platform_get_drvdata(pdev); + + backlight_update_status(bl); + return 0; +} +#else +#define pwm_backlight_suspend NULL +#define pwm_backlight_resume NULL +#endif + +static struct platform_driver pwm_backlight_driver = { + .driver = { + .name = "pwm-backlight", + .owner = THIS_MODULE, + }, + .probe = pwm_backlight_probe, + .remove = pwm_backlight_remove, + .suspend = pwm_backlight_suspend, + .resume = pwm_backlight_resume, +}; + +static int __init pwm_backlight_init(void) +{ + return platform_driver_register(&pwm_backlight_driver); +} +module_init(pwm_backlight_init); + +static void __exit pwm_backlight_exit(void) +{ + platform_driver_unregister(&pwm_backlight_driver); +} +module_exit(pwm_backlight_exit); + +MODULE_DESCRIPTION("PWM based Backlight Driver"); +MODULE_LICENSE("GPL"); diff --git a/drivers/video/fb_ddc.c b/drivers/video/fb_ddc.c index a0df63289b5f..0cf96eb8a60f 100644 --- a/drivers/video/fb_ddc.c +++ b/drivers/video/fb_ddc.c @@ -106,6 +106,7 @@ unsigned char *fb_ddc_read(struct i2c_adapter *adapter) algo_data->setsda(algo_data->data, 1); algo_data->setscl(algo_data->data, 1); + adapter->class |= I2C_CLASS_DDC; return edid; } diff --git a/drivers/video/fb_defio.c b/drivers/video/fb_defio.c index 24843fdd5395..59df132cc375 100644 --- a/drivers/video/fb_defio.c +++ b/drivers/video/fb_defio.c @@ -74,6 +74,7 @@ static int fb_deferred_io_mkwrite(struct vm_area_struct *vma, { struct fb_info *info = vma->vm_private_data; struct fb_deferred_io *fbdefio = info->fbdefio; + struct page *cur; /* this is a callback we get when userspace first tries to write to the page. we schedule a workqueue. that workqueue @@ -83,7 +84,24 @@ static int fb_deferred_io_mkwrite(struct vm_area_struct *vma, /* protect against the workqueue changing the page list */ mutex_lock(&fbdefio->lock); - list_add(&page->lru, &fbdefio->pagelist); + + /* we loop through the pagelist before adding in order + to keep the pagelist sorted */ + list_for_each_entry(cur, &fbdefio->pagelist, lru) { + /* this check is to catch the case where a new + process could start writing to the same page + through a new pte. this new access can cause the + mkwrite even when the original ps's pte is marked + writable */ + if (unlikely(cur == page)) + goto page_already_added; + else if (cur->index > page->index) + break; + } + + list_add_tail(&page->lru, &cur->lru); + +page_already_added: mutex_unlock(&fbdefio->lock); /* come back after delay to process the deferred IO */ diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c index 776f7fcd2fbf..33ebdb198daf 100644 --- a/drivers/video/fbmem.c +++ b/drivers/video/fbmem.c @@ -1326,20 +1326,27 @@ fb_open(struct inode *inode, struct file *file) if (fbidx >= FB_MAX) return -ENODEV; + lock_kernel(); #ifdef CONFIG_KMOD if (!(info = registered_fb[fbidx])) try_to_load(fbidx); #endif /* CONFIG_KMOD */ - if (!(info = registered_fb[fbidx])) - return -ENODEV; - if (!try_module_get(info->fbops->owner)) - return -ENODEV; + if (!(info = registered_fb[fbidx])) { + res = -ENODEV; + goto out; + } + if (!try_module_get(info->fbops->owner)) { + res = -ENODEV; + goto out; + } file->private_data = info; if (info->fbops->fb_open) { res = info->fbops->fb_open(info,1); if (res) module_put(info->fbops->owner); } +out: + unlock_kernel(); return res; } diff --git a/drivers/video/intelfb/intelfb_i2c.c b/drivers/video/intelfb/intelfb_i2c.c index ca95f09d8b43..fcf9fadbf572 100644 --- a/drivers/video/intelfb/intelfb_i2c.c +++ b/drivers/video/intelfb/intelfb_i2c.c @@ -100,7 +100,8 @@ static int intelfb_gpio_getsda(void *data) static int intelfb_setup_i2c_bus(struct intelfb_info *dinfo, struct intelfb_i2c_chan *chan, - const u32 reg, const char *name) + const u32 reg, const char *name, + int class) { int rc; @@ -108,6 +109,7 @@ static int intelfb_setup_i2c_bus(struct intelfb_info *dinfo, chan->reg = reg; snprintf(chan->adapter.name, sizeof(chan->adapter.name), "intelfb %s", name); + chan->adapter.class = class; chan->adapter.owner = THIS_MODULE; chan->adapter.id = I2C_HW_B_INTELFB; chan->adapter.algo_data = &chan->algo; @@ -145,7 +147,7 @@ void intelfb_create_i2c_busses(struct intelfb_info *dinfo) /* setup the DDC bus for analog output */ intelfb_setup_i2c_bus(dinfo, &dinfo->output[i].ddc_bus, GPIOA, - "CRTDDC_A"); + "CRTDDC_A", I2C_CLASS_DDC); i++; /* need to add the output busses for each device @@ -159,9 +161,9 @@ void intelfb_create_i2c_busses(struct intelfb_info *dinfo) case INTEL_865G: dinfo->output[i].type = INTELFB_OUTPUT_DVO; intelfb_setup_i2c_bus(dinfo, &dinfo->output[i].ddc_bus, - GPIOD, "DVODDC_D"); + GPIOD, "DVODDC_D", I2C_CLASS_DDC); intelfb_setup_i2c_bus(dinfo, &dinfo->output[i].i2c_bus, - GPIOE, "DVOI2C_E"); + GPIOE, "DVOI2C_E", 0); i++; break; case INTEL_915G: @@ -174,7 +176,7 @@ void intelfb_create_i2c_busses(struct intelfb_info *dinfo) /* SDVO ports have a single control bus - 2 devices */ dinfo->output[i].type = INTELFB_OUTPUT_SDVO; intelfb_setup_i2c_bus(dinfo, &dinfo->output[i].i2c_bus, - GPIOE, "SDVOCTRL_E"); + GPIOE, "SDVOCTRL_E", 0); /* TODO: initialize the SDVO */ /* I830SDVOInit(pScrn, i, DVOB); */ i++; diff --git a/drivers/video/matrox/i2c-matroxfb.c b/drivers/video/matrox/i2c-matroxfb.c index 4baab7be58de..75ee5a12e549 100644 --- a/drivers/video/matrox/i2c-matroxfb.c +++ b/drivers/video/matrox/i2c-matroxfb.c @@ -104,7 +104,9 @@ static struct i2c_algo_bit_data matrox_i2c_algo_template = }; static int i2c_bus_reg(struct i2c_bit_adapter* b, struct matrox_fb_info* minfo, - unsigned int data, unsigned int clock, const char* name) { + unsigned int data, unsigned int clock, const char *name, + int class) +{ int err; b->minfo = minfo; @@ -114,6 +116,7 @@ static int i2c_bus_reg(struct i2c_bit_adapter* b, struct matrox_fb_info* minfo, snprintf(b->adapter.name, sizeof(b->adapter.name), name, minfo->fbcon.node); i2c_set_adapdata(&b->adapter, b); + b->adapter.class = class; b->adapter.algo_data = &b->bac; b->adapter.dev.parent = &ACCESS_FBINFO(pcidev)->dev; b->bac = matrox_i2c_algo_template; @@ -159,22 +162,29 @@ static void* i2c_matroxfb_probe(struct matrox_fb_info* minfo) { switch (ACCESS_FBINFO(chip)) { case MGA_2064: case MGA_2164: - err = i2c_bus_reg(&m2info->ddc1, minfo, DDC1B_DATA, DDC1B_CLK, "DDC:fb%u #0"); + err = i2c_bus_reg(&m2info->ddc1, minfo, + DDC1B_DATA, DDC1B_CLK, + "DDC:fb%u #0", I2C_CLASS_DDC); break; default: - err = i2c_bus_reg(&m2info->ddc1, minfo, DDC1_DATA, DDC1_CLK, "DDC:fb%u #0"); + err = i2c_bus_reg(&m2info->ddc1, minfo, + DDC1_DATA, DDC1_CLK, + "DDC:fb%u #0", I2C_CLASS_DDC); break; } if (err) goto fail_ddc1; if (ACCESS_FBINFO(devflags.dualhead)) { - err = i2c_bus_reg(&m2info->ddc2, minfo, DDC2_DATA, DDC2_CLK, "DDC:fb%u #1"); + err = i2c_bus_reg(&m2info->ddc2, minfo, + DDC2_DATA, DDC2_CLK, + "DDC:fb%u #1", I2C_CLASS_DDC); if (err == -ENODEV) { printk(KERN_INFO "i2c-matroxfb: VGA->TV plug detected, DDC unavailable.\n"); } else if (err) printk(KERN_INFO "i2c-matroxfb: Could not register secondary output i2c bus. Continuing anyway.\n"); /* Register maven bus even on G450/G550 */ - err = i2c_bus_reg(&m2info->maven, minfo, MAT_DATA, MAT_CLK, "MAVEN:fb%u"); + err = i2c_bus_reg(&m2info->maven, minfo, + MAT_DATA, MAT_CLK, "MAVEN:fb%u", 0); if (err) printk(KERN_INFO "i2c-matroxfb: Could not register Maven i2c bus. Continuing anyway.\n"); } diff --git a/drivers/video/platinumfb.c b/drivers/video/platinumfb.c index cbe71a5338d0..03b3670130a0 100644 --- a/drivers/video/platinumfb.c +++ b/drivers/video/platinumfb.c @@ -31,11 +31,11 @@ #include <linux/fb.h> #include <linux/init.h> #include <linux/nvram.h> +#include <linux/of_device.h> +#include <linux/of_platform.h> #include <asm/io.h> #include <asm/prom.h> #include <asm/pgtable.h> -#include <asm/of_device.h> -#include <asm/of_platform.h> #include "macmodes.h" #include "platinumfb.h" diff --git a/drivers/video/pxafb.c b/drivers/video/pxafb.c index fafe7db20d6d..d0746261c957 100644 --- a/drivers/video/pxafb.c +++ b/drivers/video/pxafb.c @@ -1792,11 +1792,49 @@ failed: return ret; } +static int __devexit pxafb_remove(struct platform_device *dev) +{ + struct pxafb_info *fbi = platform_get_drvdata(dev); + struct resource *r; + int irq; + struct fb_info *info; + + if (!fbi) + return 0; + + info = &fbi->fb; + + unregister_framebuffer(info); + + pxafb_disable_controller(fbi); + + if (fbi->fb.cmap.len) + fb_dealloc_cmap(&fbi->fb.cmap); + + irq = platform_get_irq(dev, 0); + free_irq(irq, fbi); + + dma_free_writecombine(&dev->dev, fbi->map_size, + fbi->map_cpu, fbi->map_dma); + + iounmap(fbi->mmio_base); + + r = platform_get_resource(dev, IORESOURCE_MEM, 0); + release_mem_region(r->start, r->end - r->start + 1); + + clk_put(fbi->clk); + kfree(fbi); + + return 0; +} + static struct platform_driver pxafb_driver = { .probe = pxafb_probe, + .remove = pxafb_remove, .suspend = pxafb_suspend, .resume = pxafb_resume, .driver = { + .owner = THIS_MODULE, .name = "pxa2xx-fb", }, }; @@ -1809,7 +1847,13 @@ static int __init pxafb_init(void) return platform_driver_register(&pxafb_driver); } +static void __exit pxafb_exit(void) +{ + platform_driver_unregister(&pxafb_driver); +} + module_init(pxafb_init); +module_exit(pxafb_exit); MODULE_DESCRIPTION("loadable framebuffer driver for PXA"); MODULE_LICENSE("GPL"); |