Merge tag 'drm-next-2018-12-14' of git://anongit.freedesktop.org/drm/drm

Pull drm updates from Dave Airlie:
 "Core:
   - shared fencing staging removal
   - drop transactional atomic helpers and move helpers to new location
   - DP/MST atomic cleanup
   - Leasing cleanups and drop EXPORT_SYMBOL
   - Convert drivers to atomic helpers and generic fbdev.
   - removed deprecated obj_ref/unref in favour of get/put
   - Improve dumb callback documentation
   - MODESET_LOCK_BEGIN/END helpers

  panels:
   - CDTech panels, Banana Pi Panel, DLC1010GIG,
   - Olimex LCD-O-LinuXino, Samsung S6D16D0, Truly NT35597 WQXGA,
   - Himax HX8357D, simulated RTSM AEMv8.
   - GPD Win2 panel
   - AUO G101EVN010

  vgem:
   - render node support

  ttm:
   - move global init out of drivers
   - fix LRU handling for ghost objects
   - Support for simultaneous submissions to multiple engines

  scheduler:
   - timeout/fault handling changes to help GPU recovery
   - helpers for hw with preemption support

  i915:
   - Scaler/Watermark fixes
   - DP MST + powerwell fixes
   - PSR fixes
   - Break long get/put shmemfs pages
   - Icelake fixes
   - Icelake DSI video mode enablement
   - Engine workaround improvements

  amdgpu:
   - freesync support
   - GPU reset enabled on CI, VI, SOC15 dGPUs
   - ABM support in DC
   - KFD support for vega12/polaris12
   - SDMA paging queue on vega
   - More amdkfd code sharing
   - DCC scanout on GFX9
   - DC kerneldoc
   - Updated SMU firmware for GFX8 chips
   - XGMI PSP + hive reset support
   - GPU reset
   - DC trace support
   - Powerplay updates for newer Polaris
   - Cursor plane update fast path
   - kfd dma-buf support

  virtio-gpu:
   - add EDID support

  vmwgfx:
   - pageflip with damage support

  nouveau:
   - Initial Turing TU104/TU106 modesetting support

  msm:
   - a2xx gpu support for apq8060 and imx5
   - a2xx gpummu support
   - mdp4 display support for apq8060
   - DPU fixes and cleanups
   - enhanced profiling support
   - debug object naming interface
   - get_iova/page pinning decoupling

  tegra:
   - Tegra194 host1x, VIC and display support enabled
   - Audio over HDMI for Tegra186 and Tegra194

  exynos:
   - DMA/IOMMU refactoring
   - plane alpha + blend mode support
   - Color format fixes for mixer driver

  rcar-du:
   - R8A7744 and R8A77470 support
   - R8A77965 LVDS support

  imx:
   - fbdev emulation fix
   - multi-tiled scalling fixes
   - SPDX identifiers

  rockchip
   - dw_hdmi support
   - dw-mipi-dsi + dual dsi support
   - mailbox read size fix

  qxl:
   - fix cursor pinning

  vc4:
   - YUV support (scaling + cursor)

  v3d:
   - enable TFU (Texture Formatting Unit)

  mali-dp:
   - add support for linear tiled formats

  sun4i:
   - Display Engine 3 support
   - H6 DE3 mixer 0 support
   - H6 display engine support
   - dw-hdmi support
   - H6 HDMI phy support
   - implicit fence waiting
   - BGRX8888 support

  meson:
   - Overlay plane support
   - implicit fence waiting
   - HDMI 1.4 4k modes

  bridge:
   - i2c fixes for sii902x"

* tag 'drm-next-2018-12-14' of git://anongit.freedesktop.org/drm/drm: (1403 commits)
  drm/amd/display: Add fast path for cursor plane updates
  drm/amdgpu: Enable GPU recovery by default for CI
  drm/amd/display: Fix duplicating scaling/underscan connector state
  drm/amd/display: Fix unintialized max_bpc state values
  Revert "drm/amd/display: Set RMX_ASPECT as default"
  drm/amdgpu: Fix stub function name
  drm/msm/dpu: Fix clock issue after bind failure
  drm/msm/dpu: Clean up dpu_media_info.h static inline functions
  drm/msm/dpu: Further cleanups for static inline functions
  drm/msm/dpu: Cleanup the debugfs functions
  drm/msm/dpu: Remove dpu_irq and unused functions
  drm/msm: Make irq_postinstall optional
  drm/msm/dpu: Cleanup callers of dpu_hw_blk_init
  drm/msm/dpu: Remove unused functions
  drm/msm/dpu: Remove dpu_crtc_is_enabled()
  drm/msm/dpu: Remove dpu_crtc_get_mixer_height
  drm/msm/dpu: Remove dpu_dbg
  drm/msm: dpu: Remove crtc_lock
  drm/msm: dpu: Remove vblank_requested flag from dpu_crtc
  drm/msm: dpu: Separate crtc assignment from vblank enable
  ...

1 files changed, 157 insertions, 0 deletions

diff --git a/drivers/gpu/drm/exynos/exynos_drm_dma.c b/drivers/gpu/drm/exynos/exynos_drm_dma.c
new file mode 100644
index 000000000000..3432c5ee9f0c
--- /dev/null
+++ b/drivers/gpu/drm/exynos/exynos_drm_dma.c
@@ -0,0 +1,157 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Copyright (c) 2012 Samsung Electronics Co., Ltd.
+// Author: Inki Dae <inki.dae@samsung.com>
+// Author: Andrzej Hajda <a.hajda@samsung.com>
+
+#include <drm/drmP.h>
+#include <drm/exynos_drm.h>
+#include <linux/dma-iommu.h>
+#include <linux/dma-mapping.h>
+#include <linux/iommu.h>
+
+#include "exynos_drm_drv.h"
+
+#if defined(CONFIG_ARM_DMA_USE_IOMMU)
+#include <asm/dma-iommu.h>
+#else
+#define arm_iommu_create_mapping(...)	({ NULL; })
+#define arm_iommu_attach_device(...)	({ -ENODEV; })
+#define arm_iommu_release_mapping(...)	({ })
+#define arm_iommu_detach_device(...)	({ })
+#define to_dma_iommu_mapping(dev) NULL
+#endif
+
+#if !defined(CONFIG_IOMMU_DMA)
+#define iommu_dma_init_domain(...) ({ -EINVAL; })
+#endif
+
+#define EXYNOS_DEV_ADDR_START	0x20000000
+#define EXYNOS_DEV_ADDR_SIZE	0x40000000
+
+static inline int configure_dma_max_seg_size(struct device *dev)
+{
+	if (!dev->dma_parms)
+		dev->dma_parms = kzalloc(sizeof(*dev->dma_parms), GFP_KERNEL);
+	if (!dev->dma_parms)
+		return -ENOMEM;
+
+	dma_set_max_seg_size(dev, DMA_BIT_MASK(32));
+	return 0;
+}
+
+static inline void clear_dma_max_seg_size(struct device *dev)
+{
+	kfree(dev->dma_parms);
+	dev->dma_parms = NULL;
+}
+
+/*
+ * drm_iommu_attach_device- attach device to iommu mapping
+ *
+ * @drm_dev: DRM device
+ * @subdrv_dev: device to be attach
+ *
+ * This function should be called by sub drivers to attach it to iommu
+ * mapping.
+ */
+static int drm_iommu_attach_device(struct drm_device *drm_dev,
+				struct device *subdrv_dev)
+{
+	struct exynos_drm_private *priv = drm_dev->dev_private;
+	int ret;
+
+	if (get_dma_ops(priv->dma_dev) != get_dma_ops(subdrv_dev)) {
+		DRM_ERROR("Device %s lacks support for IOMMU\n",
+			  dev_name(subdrv_dev));
+		return -EINVAL;
+	}
+
+	ret = configure_dma_max_seg_size(subdrv_dev);
+	if (ret)
+		return ret;
+
+	if (IS_ENABLED(CONFIG_ARM_DMA_USE_IOMMU)) {
+		if (to_dma_iommu_mapping(subdrv_dev))
+			arm_iommu_detach_device(subdrv_dev);
+
+		ret = arm_iommu_attach_device(subdrv_dev, priv->mapping);
+	} else if (IS_ENABLED(CONFIG_IOMMU_DMA)) {
+		ret = iommu_attach_device(priv->mapping, subdrv_dev);
+	}
+
+	if (ret)
+		clear_dma_max_seg_size(subdrv_dev);
+
+	return 0;
+}
+
+/*
+ * drm_iommu_detach_device -detach device address space mapping from device
+ *
+ * @drm_dev: DRM device
+ * @subdrv_dev: device to be detached
+ *
+ * This function should be called by sub drivers to detach it from iommu
+ * mapping
+ */
+static void drm_iommu_detach_device(struct drm_device *drm_dev,
+				struct device *subdrv_dev)
+{
+	struct exynos_drm_private *priv = drm_dev->dev_private;
+
+	if (IS_ENABLED(CONFIG_ARM_DMA_USE_IOMMU))
+		arm_iommu_detach_device(subdrv_dev);
+	else if (IS_ENABLED(CONFIG_IOMMU_DMA))
+		iommu_detach_device(priv->mapping, subdrv_dev);
+
+	clear_dma_max_seg_size(subdrv_dev);
+}
+
+int exynos_drm_register_dma(struct drm_device *drm, struct device *dev)
+{
+	struct exynos_drm_private *priv = drm->dev_private;
+
+	if (!priv->dma_dev) {
+		priv->dma_dev = dev;
+		DRM_INFO("Exynos DRM: using %s device for DMA mapping operations\n",
+			 dev_name(dev));
+	}
+
+	if (!IS_ENABLED(CONFIG_EXYNOS_IOMMU))
+		return 0;
+
+	if (!priv->mapping) {
+		void *mapping;
+
+		if (IS_ENABLED(CONFIG_ARM_DMA_USE_IOMMU))
+			mapping = arm_iommu_create_mapping(&platform_bus_type,
+				EXYNOS_DEV_ADDR_START, EXYNOS_DEV_ADDR_SIZE);
+		else if (IS_ENABLED(CONFIG_IOMMU_DMA))
+			mapping = iommu_get_domain_for_dev(priv->dma_dev);
+
+		if (IS_ERR(mapping))
+			return PTR_ERR(mapping);
+		priv->mapping = mapping;
+	}
+
+	return drm_iommu_attach_device(drm, dev);
+}
+
+void exynos_drm_unregister_dma(struct drm_device *drm, struct device *dev)
+{
+	if (IS_ENABLED(CONFIG_EXYNOS_IOMMU))
+		drm_iommu_detach_device(drm, dev);
+}
+
+void exynos_drm_cleanup_dma(struct drm_device *drm)
+{
+	struct exynos_drm_private *priv = drm->dev_private;
+
+	if (!IS_ENABLED(CONFIG_EXYNOS_IOMMU))
+		return;
+
+	arm_iommu_release_mapping(priv->mapping);
+	priv->mapping = NULL;
+	priv->dma_dev = NULL;
+}