diff options
Diffstat (limited to 'drivers/video/fbdev/nvidia/nv_backlight.c')
| -rw-r--r-- | drivers/video/fbdev/nvidia/nv_backlight.c | 137 |
1 files changed, 0 insertions, 137 deletions
diff --git a/drivers/video/fbdev/nvidia/nv_backlight.c b/drivers/video/fbdev/nvidia/nv_backlight.c deleted file mode 100644 index 2ce53529f636..000000000000 --- a/drivers/video/fbdev/nvidia/nv_backlight.c +++ /dev/null @@ -1,137 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * Backlight code for nVidia based graphic cards - * - * Copyright 2004 Antonino Daplas <adaplas@pol.net> - * Copyright (c) 2006 Michael Hanselmann <linux-kernel@hansmi.ch> - */ - -#include <linux/backlight.h> -#include <linux/fb.h> -#include <linux/pci.h> - -#ifdef CONFIG_PMAC_BACKLIGHT -#include <asm/backlight.h> -#endif - -#include "nv_local.h" -#include "nv_type.h" -#include "nv_proto.h" - -/* We do not have any information about which values are allowed, thus - * we used safe values. - */ -#define MIN_LEVEL 0x158 -#define MAX_LEVEL 0x534 -#define LEVEL_STEP ((MAX_LEVEL - MIN_LEVEL) / FB_BACKLIGHT_MAX) - -static int nvidia_bl_get_level_brightness(struct nvidia_par *par, - int level) -{ - struct fb_info *info = pci_get_drvdata(par->pci_dev); - int nlevel; - - /* Get and convert the value */ - /* No locking of bl_curve since we read a single value */ - nlevel = MIN_LEVEL + info->bl_curve[level] * LEVEL_STEP; - - if (nlevel < 0) - nlevel = 0; - else if (nlevel < MIN_LEVEL) - nlevel = MIN_LEVEL; - else if (nlevel > MAX_LEVEL) - nlevel = MAX_LEVEL; - - return nlevel; -} - -static int nvidia_bl_update_status(struct backlight_device *bd) -{ - struct nvidia_par *par = bl_get_data(bd); - u32 tmp_pcrt, tmp_pmc, fpcontrol; - int level; - - if (!par->FlatPanel) - return 0; - - if (bd->props.power != FB_BLANK_UNBLANK || - bd->props.fb_blank != FB_BLANK_UNBLANK) - level = 0; - else - level = bd->props.brightness; - - tmp_pmc = NV_RD32(par->PMC, 0x10F0) & 0x0000FFFF; - tmp_pcrt = NV_RD32(par->PCRTC0, 0x081C) & 0xFFFFFFFC; - fpcontrol = NV_RD32(par->PRAMDAC, 0x0848) & 0xCFFFFFCC; - - if (level > 0) { - tmp_pcrt |= 0x1; - tmp_pmc |= (1 << 31); /* backlight bit */ - tmp_pmc |= nvidia_bl_get_level_brightness(par, level) << 16; - fpcontrol |= par->fpSyncs; - } else - fpcontrol |= 0x20000022; - - NV_WR32(par->PCRTC0, 0x081C, tmp_pcrt); - NV_WR32(par->PMC, 0x10F0, tmp_pmc); - NV_WR32(par->PRAMDAC, 0x848, fpcontrol); - - return 0; -} - -static const struct backlight_ops nvidia_bl_ops = { - .update_status = nvidia_bl_update_status, -}; - -void nvidia_bl_init(struct nvidia_par *par) -{ - struct backlight_properties props; - struct fb_info *info = pci_get_drvdata(par->pci_dev); - struct backlight_device *bd; - char name[12]; - - if (!par->FlatPanel) - return; - -#ifdef CONFIG_PMAC_BACKLIGHT - if (!machine_is(powermac) || - !pmac_has_backlight_type("mnca")) - return; -#endif - - snprintf(name, sizeof(name), "nvidiabl%d", info->node); - - memset(&props, 0, sizeof(struct backlight_properties)); - props.type = BACKLIGHT_RAW; - props.max_brightness = FB_BACKLIGHT_LEVELS - 1; - bd = backlight_device_register(name, info->dev, par, &nvidia_bl_ops, - &props); - if (IS_ERR(bd)) { - info->bl_dev = NULL; - printk(KERN_WARNING "nvidia: Backlight registration failed\n"); - goto error; - } - - info->bl_dev = bd; - fb_bl_default_curve(info, 0, - 0x158 * FB_BACKLIGHT_MAX / MAX_LEVEL, - 0x534 * FB_BACKLIGHT_MAX / MAX_LEVEL); - - bd->props.brightness = bd->props.max_brightness; - bd->props.power = FB_BLANK_UNBLANK; - backlight_update_status(bd); - - printk("nvidia: Backlight initialized (%s)\n", name); - -error: - return; -} - -void nvidia_bl_exit(struct nvidia_par *par) -{ - struct fb_info *info = pci_get_drvdata(par->pci_dev); - struct backlight_device *bd = info->bl_dev; - - backlight_device_unregister(bd); - printk("nvidia: Backlight unloaded\n"); -} |