diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/nouveau_backlight.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/nouveau_backlight.c | 329 |
1 files changed, 329 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nouveau_backlight.c b/drivers/gpu/drm/nouveau/nouveau_backlight.c new file mode 100644 index 000000000..6dd72bc32 --- /dev/null +++ b/drivers/gpu/drm/nouveau/nouveau_backlight.c @@ -0,0 +1,329 @@ +/* + * Copyright (C) 2009 Red Hat <mjg@redhat.com> + * + * Permission is hereby granted, free of charge, to any person obtaining + * a copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sublicense, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial + * portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. + * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE + * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION + * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION + * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + */ + +/* + * Authors: + * Matthew Garrett <mjg@redhat.com> + * + * Register locations derived from NVClock by Roderick Colenbrander + */ + +#include <linux/apple-gmux.h> +#include <linux/backlight.h> +#include <linux/idr.h> + +#include "nouveau_drv.h" +#include "nouveau_reg.h" +#include "nouveau_encoder.h" + +static struct ida bl_ida; +#define BL_NAME_SIZE 15 // 12 for name + 2 for digits + 1 for '\0' + +struct backlight_connector { + struct list_head head; + int id; +}; + +static bool +nouveau_get_backlight_name(char backlight_name[BL_NAME_SIZE], struct backlight_connector + *connector) +{ + const int nb = ida_simple_get(&bl_ida, 0, 0, GFP_KERNEL); + if (nb < 0 || nb >= 100) + return false; + if (nb > 0) + snprintf(backlight_name, BL_NAME_SIZE, "nv_backlight%d", nb); + else + snprintf(backlight_name, BL_NAME_SIZE, "nv_backlight"); + connector->id = nb; + return true; +} + +static int +nv40_get_intensity(struct backlight_device *bd) +{ + struct nouveau_drm *drm = bl_get_data(bd); + struct nvif_object *device = &drm->client.device.object; + int val = (nvif_rd32(device, NV40_PMC_BACKLIGHT) & + NV40_PMC_BACKLIGHT_MASK) >> 16; + + return val; +} + +static int +nv40_set_intensity(struct backlight_device *bd) +{ + struct nouveau_drm *drm = bl_get_data(bd); + struct nvif_object *device = &drm->client.device.object; + int val = bd->props.brightness; + int reg = nvif_rd32(device, NV40_PMC_BACKLIGHT); + + nvif_wr32(device, NV40_PMC_BACKLIGHT, + (val << 16) | (reg & ~NV40_PMC_BACKLIGHT_MASK)); + + return 0; +} + +static const struct backlight_ops nv40_bl_ops = { + .options = BL_CORE_SUSPENDRESUME, + .get_brightness = nv40_get_intensity, + .update_status = nv40_set_intensity, +}; + +static int +nv40_backlight_init(struct drm_connector *connector) +{ + struct nouveau_drm *drm = nouveau_drm(connector->dev); + struct nvif_object *device = &drm->client.device.object; + struct backlight_properties props; + struct backlight_device *bd; + struct backlight_connector bl_connector; + char backlight_name[BL_NAME_SIZE]; + + if (!(nvif_rd32(device, NV40_PMC_BACKLIGHT) & NV40_PMC_BACKLIGHT_MASK)) + return 0; + + memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; + props.max_brightness = 31; + if (!nouveau_get_backlight_name(backlight_name, &bl_connector)) { + NV_ERROR(drm, "Failed to retrieve a unique name for the backlight interface\n"); + return 0; + } + bd = backlight_device_register(backlight_name , connector->kdev, drm, + &nv40_bl_ops, &props); + + if (IS_ERR(bd)) { + if (bl_connector.id >= 0) + ida_simple_remove(&bl_ida, bl_connector.id); + return PTR_ERR(bd); + } + list_add(&bl_connector.head, &drm->bl_connectors); + drm->backlight = bd; + bd->props.brightness = nv40_get_intensity(bd); + backlight_update_status(bd); + + return 0; +} + +static int +nv50_get_intensity(struct backlight_device *bd) +{ + struct nouveau_encoder *nv_encoder = bl_get_data(bd); + struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev); + struct nvif_object *device = &drm->client.device.object; + int or = ffs(nv_encoder->dcb->or) - 1; + u32 div = 1025; + u32 val; + + val = nvif_rd32(device, NV50_PDISP_SOR_PWM_CTL(or)); + val &= NV50_PDISP_SOR_PWM_CTL_VAL; + return ((val * 100) + (div / 2)) / div; +} + +static int +nv50_set_intensity(struct backlight_device *bd) +{ + struct nouveau_encoder *nv_encoder = bl_get_data(bd); + struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev); + struct nvif_object *device = &drm->client.device.object; + int or = ffs(nv_encoder->dcb->or) - 1; + u32 div = 1025; + u32 val = (bd->props.brightness * div) / 100; + + nvif_wr32(device, NV50_PDISP_SOR_PWM_CTL(or), + NV50_PDISP_SOR_PWM_CTL_NEW | val); + return 0; +} + +static const struct backlight_ops nv50_bl_ops = { + .options = BL_CORE_SUSPENDRESUME, + .get_brightness = nv50_get_intensity, + .update_status = nv50_set_intensity, +}; + +static int +nva3_get_intensity(struct backlight_device *bd) +{ + struct nouveau_encoder *nv_encoder = bl_get_data(bd); + struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev); + struct nvif_object *device = &drm->client.device.object; + int or = ffs(nv_encoder->dcb->or) - 1; + u32 div, val; + + div = nvif_rd32(device, NV50_PDISP_SOR_PWM_DIV(or)); + val = nvif_rd32(device, NV50_PDISP_SOR_PWM_CTL(or)); + val &= NVA3_PDISP_SOR_PWM_CTL_VAL; + if (div && div >= val) + return ((val * 100) + (div / 2)) / div; + + return 100; +} + +static int +nva3_set_intensity(struct backlight_device *bd) +{ + struct nouveau_encoder *nv_encoder = bl_get_data(bd); + struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev); + struct nvif_object *device = &drm->client.device.object; + int or = ffs(nv_encoder->dcb->or) - 1; + u32 div, val; + + div = nvif_rd32(device, NV50_PDISP_SOR_PWM_DIV(or)); + val = (bd->props.brightness * div) / 100; + if (div) { + nvif_wr32(device, NV50_PDISP_SOR_PWM_CTL(or), val | + NV50_PDISP_SOR_PWM_CTL_NEW | + NVA3_PDISP_SOR_PWM_CTL_UNK); + return 0; + } + + return -EINVAL; +} + +static const struct backlight_ops nva3_bl_ops = { + .options = BL_CORE_SUSPENDRESUME, + .get_brightness = nva3_get_intensity, + .update_status = nva3_set_intensity, +}; + +static int +nv50_backlight_init(struct drm_connector *connector) +{ + struct nouveau_drm *drm = nouveau_drm(connector->dev); + struct nvif_object *device = &drm->client.device.object; + struct nouveau_encoder *nv_encoder; + struct backlight_properties props; + struct backlight_device *bd; + const struct backlight_ops *ops; + struct backlight_connector bl_connector; + char backlight_name[BL_NAME_SIZE]; + + nv_encoder = find_encoder(connector, DCB_OUTPUT_LVDS); + if (!nv_encoder) { + nv_encoder = find_encoder(connector, DCB_OUTPUT_DP); + if (!nv_encoder) + return -ENODEV; + } + + if (!nvif_rd32(device, NV50_PDISP_SOR_PWM_CTL(ffs(nv_encoder->dcb->or) - 1))) + return 0; + + if (drm->client.device.info.chipset <= 0xa0 || + drm->client.device.info.chipset == 0xaa || + drm->client.device.info.chipset == 0xac) + ops = &nv50_bl_ops; + else + ops = &nva3_bl_ops; + + memset(&props, 0, sizeof(struct backlight_properties)); + props.type = BACKLIGHT_RAW; + props.max_brightness = 100; + if (!nouveau_get_backlight_name(backlight_name, &bl_connector)) { + NV_ERROR(drm, "Failed to retrieve a unique name for the backlight interface\n"); + return 0; + } + bd = backlight_device_register(backlight_name , connector->kdev, + nv_encoder, ops, &props); + + if (IS_ERR(bd)) { + if (bl_connector.id >= 0) + ida_simple_remove(&bl_ida, bl_connector.id); + return PTR_ERR(bd); + } + + list_add(&bl_connector.head, &drm->bl_connectors); + drm->backlight = bd; + bd->props.brightness = bd->ops->get_brightness(bd); + backlight_update_status(bd); + return 0; +} + +int +nouveau_backlight_init(struct drm_device *dev) +{ + struct nouveau_drm *drm = nouveau_drm(dev); + struct nvif_device *device = &drm->client.device; + struct drm_connector *connector; + struct drm_connector_list_iter conn_iter; + + INIT_LIST_HEAD(&drm->bl_connectors); + + if (apple_gmux_present()) { + NV_INFO(drm, "Apple GMUX detected: not registering Nouveau backlight interface\n"); + return 0; + } + + drm_connector_list_iter_begin(dev, &conn_iter); + drm_for_each_connector_iter(connector, &conn_iter) { + if (connector->connector_type != DRM_MODE_CONNECTOR_LVDS && + connector->connector_type != DRM_MODE_CONNECTOR_eDP) + continue; + + switch (device->info.family) { + case NV_DEVICE_INFO_V0_CURIE: + return nv40_backlight_init(connector); + case NV_DEVICE_INFO_V0_TESLA: + case NV_DEVICE_INFO_V0_FERMI: + case NV_DEVICE_INFO_V0_KEPLER: + case NV_DEVICE_INFO_V0_MAXWELL: + return nv50_backlight_init(connector); + default: + break; + } + } + drm_connector_list_iter_end(&conn_iter); + + return 0; +} + +void +nouveau_backlight_exit(struct drm_device *dev) +{ + struct nouveau_drm *drm = nouveau_drm(dev); + struct backlight_connector *connector; + + list_for_each_entry(connector, &drm->bl_connectors, head) { + if (connector->id >= 0) + ida_simple_remove(&bl_ida, connector->id); + } + + if (drm->backlight) { + backlight_device_unregister(drm->backlight); + drm->backlight = NULL; + } +} + +void +nouveau_backlight_ctor(void) +{ + ida_init(&bl_ida); +} + +void +nouveau_backlight_dtor(void) +{ + ida_destroy(&bl_ida); +} |