forked from Minki/linux
328 lines
8.8 KiB
C
328 lines
8.8 KiB
C
/*
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* Copyright (C) 2009 Red Hat <mjg@redhat.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial
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* portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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/*
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* Authors:
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* Matthew Garrett <mjg@redhat.com>
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*
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* Register locations derived from NVClock by Roderick Colenbrander
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*/
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#include <linux/apple-gmux.h>
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#include <linux/backlight.h>
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#include <linux/idr.h>
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#include "nouveau_drv.h"
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#include "nouveau_reg.h"
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#include "nouveau_encoder.h"
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static struct ida bl_ida;
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#define BL_NAME_SIZE 15 // 12 for name + 2 for digits + 1 for '\0'
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struct backlight_connector {
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struct list_head head;
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int id;
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};
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static bool
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nouveau_get_backlight_name(char backlight_name[BL_NAME_SIZE], struct backlight_connector
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*connector)
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{
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const int nb = ida_simple_get(&bl_ida, 0, 0, GFP_KERNEL);
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if (nb < 0 || nb >= 100)
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return false;
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if (nb > 0)
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snprintf(backlight_name, BL_NAME_SIZE, "nv_backlight%d", nb);
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else
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snprintf(backlight_name, BL_NAME_SIZE, "nv_backlight");
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connector->id = nb;
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return true;
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}
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static int
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nv40_get_intensity(struct backlight_device *bd)
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{
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struct nouveau_drm *drm = bl_get_data(bd);
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struct nvif_object *device = &drm->client.device.object;
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int val = (nvif_rd32(device, NV40_PMC_BACKLIGHT) &
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NV40_PMC_BACKLIGHT_MASK) >> 16;
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return val;
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}
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static int
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nv40_set_intensity(struct backlight_device *bd)
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{
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struct nouveau_drm *drm = bl_get_data(bd);
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struct nvif_object *device = &drm->client.device.object;
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int val = bd->props.brightness;
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int reg = nvif_rd32(device, NV40_PMC_BACKLIGHT);
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nvif_wr32(device, NV40_PMC_BACKLIGHT,
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(val << 16) | (reg & ~NV40_PMC_BACKLIGHT_MASK));
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return 0;
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}
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static const struct backlight_ops nv40_bl_ops = {
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.options = BL_CORE_SUSPENDRESUME,
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.get_brightness = nv40_get_intensity,
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.update_status = nv40_set_intensity,
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};
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static int
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nv40_backlight_init(struct drm_connector *connector)
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{
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struct nouveau_drm *drm = nouveau_drm(connector->dev);
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struct nvif_object *device = &drm->client.device.object;
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struct backlight_properties props;
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struct backlight_device *bd;
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struct backlight_connector bl_connector;
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char backlight_name[BL_NAME_SIZE];
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if (!(nvif_rd32(device, NV40_PMC_BACKLIGHT) & NV40_PMC_BACKLIGHT_MASK))
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return 0;
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memset(&props, 0, sizeof(struct backlight_properties));
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props.type = BACKLIGHT_RAW;
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props.max_brightness = 31;
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if (!nouveau_get_backlight_name(backlight_name, &bl_connector)) {
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NV_ERROR(drm, "Failed to retrieve a unique name for the backlight interface\n");
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return 0;
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}
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bd = backlight_device_register(backlight_name , connector->kdev, drm,
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&nv40_bl_ops, &props);
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if (IS_ERR(bd)) {
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if (bl_connector.id > 0)
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ida_simple_remove(&bl_ida, bl_connector.id);
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return PTR_ERR(bd);
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}
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list_add(&bl_connector.head, &drm->bl_connectors);
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drm->backlight = bd;
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bd->props.brightness = nv40_get_intensity(bd);
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backlight_update_status(bd);
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return 0;
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}
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static int
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nv50_get_intensity(struct backlight_device *bd)
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{
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struct nouveau_encoder *nv_encoder = bl_get_data(bd);
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struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
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struct nvif_object *device = &drm->client.device.object;
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int or = nv_encoder->or;
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u32 div = 1025;
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u32 val;
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val = nvif_rd32(device, NV50_PDISP_SOR_PWM_CTL(or));
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val &= NV50_PDISP_SOR_PWM_CTL_VAL;
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return ((val * 100) + (div / 2)) / div;
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}
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static int
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nv50_set_intensity(struct backlight_device *bd)
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{
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struct nouveau_encoder *nv_encoder = bl_get_data(bd);
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struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
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struct nvif_object *device = &drm->client.device.object;
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int or = nv_encoder->or;
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u32 div = 1025;
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u32 val = (bd->props.brightness * div) / 100;
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nvif_wr32(device, NV50_PDISP_SOR_PWM_CTL(or),
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NV50_PDISP_SOR_PWM_CTL_NEW | val);
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return 0;
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}
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static const struct backlight_ops nv50_bl_ops = {
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.options = BL_CORE_SUSPENDRESUME,
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.get_brightness = nv50_get_intensity,
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.update_status = nv50_set_intensity,
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};
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static int
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nva3_get_intensity(struct backlight_device *bd)
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{
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struct nouveau_encoder *nv_encoder = bl_get_data(bd);
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struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
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struct nvif_object *device = &drm->client.device.object;
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int or = nv_encoder->or;
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u32 div, val;
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div = nvif_rd32(device, NV50_PDISP_SOR_PWM_DIV(or));
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val = nvif_rd32(device, NV50_PDISP_SOR_PWM_CTL(or));
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val &= NVA3_PDISP_SOR_PWM_CTL_VAL;
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if (div && div >= val)
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return ((val * 100) + (div / 2)) / div;
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return 100;
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}
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static int
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nva3_set_intensity(struct backlight_device *bd)
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{
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struct nouveau_encoder *nv_encoder = bl_get_data(bd);
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struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
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struct nvif_object *device = &drm->client.device.object;
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int or = nv_encoder->or;
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u32 div, val;
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div = nvif_rd32(device, NV50_PDISP_SOR_PWM_DIV(or));
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val = (bd->props.brightness * div) / 100;
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if (div) {
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nvif_wr32(device, NV50_PDISP_SOR_PWM_CTL(or), val |
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NV50_PDISP_SOR_PWM_CTL_NEW |
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NVA3_PDISP_SOR_PWM_CTL_UNK);
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return 0;
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}
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return -EINVAL;
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}
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static const struct backlight_ops nva3_bl_ops = {
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.options = BL_CORE_SUSPENDRESUME,
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.get_brightness = nva3_get_intensity,
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.update_status = nva3_set_intensity,
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};
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static int
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nv50_backlight_init(struct drm_connector *connector)
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{
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struct nouveau_drm *drm = nouveau_drm(connector->dev);
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struct nvif_object *device = &drm->client.device.object;
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struct nouveau_encoder *nv_encoder;
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struct backlight_properties props;
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struct backlight_device *bd;
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const struct backlight_ops *ops;
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struct backlight_connector bl_connector;
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char backlight_name[BL_NAME_SIZE];
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nv_encoder = find_encoder(connector, DCB_OUTPUT_LVDS);
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if (!nv_encoder) {
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nv_encoder = find_encoder(connector, DCB_OUTPUT_DP);
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if (!nv_encoder)
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return -ENODEV;
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}
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if (!nvif_rd32(device, NV50_PDISP_SOR_PWM_CTL(nv_encoder->or)))
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return 0;
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if (drm->client.device.info.chipset <= 0xa0 ||
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drm->client.device.info.chipset == 0xaa ||
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drm->client.device.info.chipset == 0xac)
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ops = &nv50_bl_ops;
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else
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ops = &nva3_bl_ops;
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memset(&props, 0, sizeof(struct backlight_properties));
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props.type = BACKLIGHT_RAW;
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props.max_brightness = 100;
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if (!nouveau_get_backlight_name(backlight_name, &bl_connector)) {
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NV_ERROR(drm, "Failed to retrieve a unique name for the backlight interface\n");
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return 0;
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}
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bd = backlight_device_register(backlight_name , connector->kdev,
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nv_encoder, ops, &props);
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if (IS_ERR(bd)) {
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if (bl_connector.id > 0)
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ida_simple_remove(&bl_ida, bl_connector.id);
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return PTR_ERR(bd);
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}
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list_add(&bl_connector.head, &drm->bl_connectors);
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drm->backlight = bd;
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bd->props.brightness = bd->ops->get_brightness(bd);
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backlight_update_status(bd);
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return 0;
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}
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int
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nouveau_backlight_init(struct drm_device *dev)
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{
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struct nouveau_drm *drm = nouveau_drm(dev);
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struct nvif_device *device = &drm->client.device;
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struct drm_connector *connector;
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if (apple_gmux_present()) {
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NV_INFO(drm, "Apple GMUX detected: not registering Nouveau backlight interface\n");
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return 0;
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}
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INIT_LIST_HEAD(&drm->bl_connectors);
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list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
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if (connector->connector_type != DRM_MODE_CONNECTOR_LVDS &&
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connector->connector_type != DRM_MODE_CONNECTOR_eDP)
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continue;
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switch (device->info.family) {
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case NV_DEVICE_INFO_V0_CURIE:
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return nv40_backlight_init(connector);
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case NV_DEVICE_INFO_V0_TESLA:
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case NV_DEVICE_INFO_V0_FERMI:
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case NV_DEVICE_INFO_V0_KEPLER:
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case NV_DEVICE_INFO_V0_MAXWELL:
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return nv50_backlight_init(connector);
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default:
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break;
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}
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}
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return 0;
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}
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void
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nouveau_backlight_exit(struct drm_device *dev)
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{
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struct nouveau_drm *drm = nouveau_drm(dev);
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struct backlight_connector *connector;
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list_for_each_entry(connector, &drm->bl_connectors, head) {
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if (connector->id >= 0)
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ida_simple_remove(&bl_ida, connector->id);
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}
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if (drm->backlight) {
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backlight_device_unregister(drm->backlight);
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drm->backlight = NULL;
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}
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}
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void
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nouveau_backlight_ctor(void)
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{
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ida_init(&bl_ida);
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}
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void
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nouveau_backlight_dtor(void)
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{
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ida_destroy(&bl_ida);
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}
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