Merge tag 'drm-for-v4.10' of git://people.freedesktop.org/~airlied/linux

Pull drm updates from Dave Airlie:
 "This is the main pull request for drm for 4.10 kernel.

  New drivers:
   - ZTE VOU display driver (zxdrm)
   - Amlogic Meson Graphic Controller GXBB/GXL/GXM SoCs (meson)
   - MXSFB support (mxsfb)

  Core:
   - Format handling has been reworked
   - Better atomic state debugging
   - drm_mm leak debugging
   - Atomic explicit fencing support
   - fbdev helper ops
   - Documentation updates
   - MST fbcon fixes

  Bridge:
   - Silicon Image SiI8620 driver

  Panel:
   - Add support for new simple panels

  i915:
   - GVT Device model
   - Better HDMI2.0 support on skylake
   - More watermark fixes
   - GPU idling rework for suspend/resume
   - DP Audio workarounds
   - Scheduler prep-work
   - Opregion CADL handling
   - GPU scheduler and priority boosting

  amdgfx/radeon:
   - Support for virtual devices
   - New VM manager for non-contig VRAM buffers
   - UVD powergating
   - SI register header cleanup
   - Cursor fixes
   - Powermanagement fixes

  nouveau:
   - Powermangement reworks for better voltage/clock changes
   - Atomic modesetting support
   - Displayport Multistream (MST) support.
   - GP102/104 hang and cursor fixes
   - GP106 support

  hisilicon:
   - hibmc support (BMC chip for aarch64 servers)

  armada:
   - add tracing support for overlay change
   - refactor plane support
   - de-midlayer the driver

  omapdrm:
   - Timing code cleanups

  rcar-du:
   - R8A7792/R8A7796 support
   - Misc fixes.

  sunxi:
   - A31 SoC display engine support

  imx-drm:
   - YUV format support
   - Cleanup plane atomic update

  mali-dp:
   - Misc fixes

  dw-hdmi:
   - Add support for HDMI i2c master controller

  tegra:
   - IOMMU support fixes
   - Error handling fixes

  tda998x:
   - Fix connector registration
   - Improved robustness
   - Fix infoframe/audio compliance

  virtio:
   - fix busid issues
   - allocate more vbufs

  qxl:
   - misc fixes and cleanups.

  vc4:
   - Fragment shader threading
   - ETC1 support
   - VEC (tv-out) support

  msm:
   - A5XX GPU support
   - Lots of atomic changes

  tilcdc:
   - Misc fixes and cleanups.

  etnaviv:
   - Fix dma-buf export path
   - DRAW_INSTANCED support
   - fix driver on i.MX6SX

  exynos:
   - HDMI refactoring

  fsl-dcu:
   - fbdev changes"

* tag 'drm-for-v4.10' of git://people.freedesktop.org/~airlied/linux: (1343 commits)
  drm/nouveau/kms/nv50: fix atomic regression on original G80
  drm/nouveau/bl: Do not register interface if Apple GMUX detected
  drm/nouveau/bl: Assign different names to interfaces
  drm/nouveau/bios/dp: fix handling of LevelEntryTableIndex on DP table 4.2
  drm/nouveau/ltc: protect clearing of comptags with mutex
  drm/nouveau/gr/gf100-: handle GPC/TPC/MPC trap
  drm/nouveau/core: recognise GP106 chipset
  drm/nouveau/ttm: wait for bo fence to signal before unmapping vmas
  drm/nouveau/gr/gf100-: FECS intr handling is not relevant on proprietary ucode
  drm/nouveau/gr/gf100-: properly ack all FECS error interrupts
  drm/nouveau/fifo/gf100-: recover from host mmu faults
  drm: Add fake controlD* symlinks for backwards compat
  drm/vc4: Don't use drm_put_dev
  drm/vc4: Document VEC DT binding
  drm/vc4: Add support for the VEC (Video Encoder) IP
  drm: Add TV connector states to drm_connector_state
  drm: Turn DRM_MODE_SUBCONNECTOR_xx definitions into an enum
  drm/vc4: Fix ->clock_select setting for the VEC encoder
  drm/amdgpu/dce6: Set MASTER_UPDATE_MODE to 0 in resume_mc_access as well
  drm/amdgpu: use pin rather than pin_restricted in a few cases
  ...

1 files changed, 77 insertions, 4 deletions

diff --git a/drivers/gpu/drm/nouveau/nouveau_backlight.c b/drivers/gpu/drm/nouveau/nouveau_backlight.c
index f5101be..8b1ca4a 100644
--- a/drivers/gpu/drm/nouveau/nouveau_backlight.c
+++ b/drivers/gpu/drm/nouveau/nouveau_backlight.c
@@ -30,12 +30,37 @@
  * 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)
 {
@@ -74,6 +99,8 @@ nv40_backlight_init(struct drm_connector *connector)
 	struct nvif_object *device = &drm->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;
@@ -81,10 +108,19 @@ nv40_backlight_init(struct drm_connector *connector)
 	memset(&props, 0, sizeof(struct backlight_properties));
 	props.type = BACKLIGHT_RAW;
 	props.max_brightness = 31;
-	bd = backlight_device_register("nv_backlight", connector->kdev, drm,
+	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 (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);
@@ -182,6 +218,8 @@ nv50_backlight_init(struct drm_connector *connector)
 	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) {
@@ -203,11 +241,20 @@ nv50_backlight_init(struct drm_connector *connector)
 	memset(&props, 0, sizeof(struct backlight_properties));
 	props.type = BACKLIGHT_RAW;
 	props.max_brightness = 100;
-	bd = backlight_device_register("nv_backlight", connector->kdev,
+	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 (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);
@@ -221,6 +268,13 @@ nouveau_backlight_init(struct drm_device *dev)
 	struct nvif_device *device = &drm->device;
 	struct drm_connector *connector;
 
+	if (apple_gmux_present()) {
+		NV_INFO(drm, "Apple GMUX detected: not registering Nouveau backlight interface\n");
+		return 0;
+	}
+
+	INIT_LIST_HEAD(&drm->bl_connectors);
+
 	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)
@@ -232,6 +286,7 @@ nouveau_backlight_init(struct drm_device *dev)
 		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;
@@ -246,9 +301,27 @@ 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);
+}