--- /dev/null
+/*
+ * 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/backlight.h>
+
+#include "nouveau_drm.h"
+#include "nouveau_reg.h"
+#include "nouveau_encoder.h"
+
+static int
+nv40_get_intensity(struct backlight_device *bd)
+{
+ struct nouveau_drm *drm = bl_get_data(bd);
+ struct nvif_device *device = &drm->device;
+ 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_device *device = &drm->device;
+ 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_device *device = &drm->device;
+ struct backlight_properties props;
+ struct backlight_device *bd;
+
+ 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;
+ bd = backlight_device_register("nv_backlight", connector->kdev, drm,
+ &nv40_bl_ops, &props);
+ if (IS_ERR(bd))
+ return PTR_ERR(bd);
+ 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_device *device = &drm->device;
+ int or = nv_encoder->or;
+ 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_device *device = &drm->device;
+ int or = nv_encoder->or;
+ 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_device *device = &drm->device;
+ int or = nv_encoder->or;
+ 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_device *device = &drm->device;
+ int or = nv_encoder->or;
+ 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_device *device = &drm->device;
+ struct nouveau_encoder *nv_encoder;
+ struct backlight_properties props;
+ struct backlight_device *bd;
+ const struct backlight_ops *ops;
+
+ 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(nv_encoder->or)))
+ return 0;
+
+ if (device->info.chipset <= 0xa0 ||
+ device->info.chipset == 0xaa ||
+ 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;
+ bd = backlight_device_register("nv_backlight", connector->kdev,
+ nv_encoder, ops, &props);
+ if (IS_ERR(bd))
+ return PTR_ERR(bd);
+
+ 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->device;
+ struct drm_connector *connector;
+
+ list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
+ 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:
+ return nv50_backlight_init(connector);
+ default:
+ break;
+ }
+ }
+
+
+ return 0;
+}
+
+void
+nouveau_backlight_exit(struct drm_device *dev)
+{
+ struct nouveau_drm *drm = nouveau_drm(dev);
+
+ if (drm->backlight) {
+ backlight_device_unregister(drm->backlight);
+ drm->backlight = NULL;
+ }
+}
Code Review / kvmfornfv.git / blobdiff