Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux

Pull drm updates from Dave Airlie:
 "This is the main drm pull request for v4.2.

  I've one other new driver from freescale on my radar, it's been posted
  and reviewed, I'd just like to get someone to give it a last look, so
  maybe I'll send it or maybe I'll leave it.

  There is no major nouveau changes in here, Ben was working on
  something big, and we agreed it was a bit late, there wasn't anything
  else he considered urgent to merge.

  There might be another msm pull for some bits that are waiting on
  arm-soc, I'll see how we time it.

  This touches some "of" stuff, acks are in place except for the fixes
  to the build in various configs,t hat I just applied.

  Summary:

  New drivers:
      - virtio-gpu:
                KMS only pieces of driver for virtio-gpu in qemu.
                This is just the first part of this driver, enough to run
                unaccelerated userspace on. As qemu merges more we'll start
                adding the 3D features for the virgl 3d work.
      - amdgpu:
                a new driver from AMD to driver their newer GPUs. (VI+)
                It contains a new cleaner userspace API, and is a clean
                break from radeon moving forward, that AMD are going to
                concentrate on. It also contains a set of register headers
                auto generated from AMD internal database.

  core:
      - atomic modesetting API completed, enabled by default now.
      - Add support for mode_id blob to atomic ioctl to complete interface.
      - bunch of Displayport MST fixes
      - lots of misc fixes.

  panel:
      - new simple panels
      - fix some long-standing build issues with bridge drivers

  radeon:
      - VCE1 support
      - add a GPU reset counter for userspace
      - lots of fixes.

  amdkfd:
      - H/W debugger support module
      - static user-mode queues
      - support killing all the waves when a process terminates
      - use standard DECLARE_BITMAP

  i915:
      - Add Broxton support
      - S3, rotation support for Skylake
      - RPS booting tuning
      - CPT modeset sequence fixes
      - ns2501 dither support
      - enable cmd parser on haswell
      - cdclk handling fixes
      - gen8 dynamic pte allocation
      - lots of atomic conversion work

  exynos:
      - Add atomic modesetting support
      - Add iommu support
      - Consolidate drm driver initialization
      - and MIC, DECON and MIPI-DSI support for exynos5433

  omapdrm:
      - atomic modesetting support (fixes lots of things in rewrite)

  tegra:
      - DP aux transaction fixes
      - iommu support fix

  msm:
      - adreno a306 support
      - various dsi bits
      - various 64-bit fixes
      - NV12MT support

  rcar-du:
      - atomic and misc fixes

  sti:
      - fix HDMI timing complaince

  tilcdc:
      - use drm component API to access tda998x driver
      - fix module unloading

  qxl:
      - stability fixes"

* 'drm-next' of git://people.freedesktop.org/~airlied/linux: (872 commits)
  drm/nouveau: Pause between setting gpu to D3hot and cutting the power
  drm/dp/mst: close deadlock in connector destruction.
  drm: Always enable atomic API
  drm/vgem: Set unique to "vgem"
  of: fix a build error to of_graph_get_endpoint_by_regs function
  drm/dp/mst: take lock around looking up the branch device on hpd irq
  drm/dp/mst: make sure mst_primary mstb is valid in work function
  of: add EXPORT_SYMBOL for of_graph_get_endpoint_by_regs
  ARM: dts: rename the clock of MIPI DSI 'pll_clk' to 'sclk_mipi'
  drm/atomic: Don't set crtc_state->enable manually
  drm/exynos: dsi: do not set TE GPIO direction by input
  drm/exynos: dsi: add support for MIC driver as a bridge
  drm/exynos: dsi: add support for Exynos5433
  drm/exynos: dsi: make use of array for clock access
  drm/exynos: dsi: make use of driver data for static values
  drm/exynos: dsi: add macros for register access
  drm/exynos: dsi: rename pll_clk to sclk_clk
  drm/exynos: mic: add MIC driver
  of: add helper for getting endpoint node of specific identifiers
  drm/exynos: add Exynos5433 decon driver
  ...

1 files changed, 452 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/cz_ih.c b/drivers/gpu/drm/amd/amdgpu/cz_ih.c
new file mode 100644
index 000000000000..bc751bfbcae2
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdgpu/cz_ih.c
@@ -0,0 +1,452 @@
+/*
+ * Copyright 2014 Advanced Micro Devices, Inc.
+ *
+ * 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 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 HOLDER(S) OR AUTHOR(S) 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.
+ *
+ */
+#include "drmP.h"
+#include "amdgpu.h"
+#include "amdgpu_ih.h"
+#include "vid.h"
+
+#include "oss/oss_3_0_1_d.h"
+#include "oss/oss_3_0_1_sh_mask.h"
+
+#include "bif/bif_5_1_d.h"
+#include "bif/bif_5_1_sh_mask.h"
+
+/*
+ * Interrupts
+ * Starting with r6xx, interrupts are handled via a ring buffer.
+ * Ring buffers are areas of GPU accessible memory that the GPU
+ * writes interrupt vectors into and the host reads vectors out of.
+ * There is a rptr (read pointer) that determines where the
+ * host is currently reading, and a wptr (write pointer)
+ * which determines where the GPU has written.  When the
+ * pointers are equal, the ring is idle.  When the GPU
+ * writes vectors to the ring buffer, it increments the
+ * wptr.  When there is an interrupt, the host then starts
+ * fetching commands and processing them until the pointers are
+ * equal again at which point it updates the rptr.
+ */
+
+static void cz_ih_set_interrupt_funcs(struct amdgpu_device *adev);
+
+/**
+ * cz_ih_enable_interrupts - Enable the interrupt ring buffer
+ *
+ * @adev: amdgpu_device pointer
+ *
+ * Enable the interrupt ring buffer (VI).
+ */
+static void cz_ih_enable_interrupts(struct amdgpu_device *adev)
+{
+	u32 ih_cntl = RREG32(mmIH_CNTL);
+	u32 ih_rb_cntl = RREG32(mmIH_RB_CNTL);
+
+	ih_cntl = REG_SET_FIELD(ih_cntl, IH_CNTL, ENABLE_INTR, 1);
+	ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, RB_ENABLE, 1);
+	WREG32(mmIH_CNTL, ih_cntl);
+	WREG32(mmIH_RB_CNTL, ih_rb_cntl);
+	adev->irq.ih.enabled = true;
+}
+
+/**
+ * cz_ih_disable_interrupts - Disable the interrupt ring buffer
+ *
+ * @adev: amdgpu_device pointer
+ *
+ * Disable the interrupt ring buffer (VI).
+ */
+static void cz_ih_disable_interrupts(struct amdgpu_device *adev)
+{
+	u32 ih_rb_cntl = RREG32(mmIH_RB_CNTL);
+	u32 ih_cntl = RREG32(mmIH_CNTL);
+
+	ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, RB_ENABLE, 0);
+	ih_cntl = REG_SET_FIELD(ih_cntl, IH_CNTL, ENABLE_INTR, 0);
+	WREG32(mmIH_RB_CNTL, ih_rb_cntl);
+	WREG32(mmIH_CNTL, ih_cntl);
+	/* set rptr, wptr to 0 */
+	WREG32(mmIH_RB_RPTR, 0);
+	WREG32(mmIH_RB_WPTR, 0);
+	adev->irq.ih.enabled = false;
+	adev->irq.ih.rptr = 0;
+}
+
+/**
+ * cz_ih_irq_init - init and enable the interrupt ring
+ *
+ * @adev: amdgpu_device pointer
+ *
+ * Allocate a ring buffer for the interrupt controller,
+ * enable the RLC, disable interrupts, enable the IH
+ * ring buffer and enable it (VI).
+ * Called at device load and reume.
+ * Returns 0 for success, errors for failure.
+ */
+static int cz_ih_irq_init(struct amdgpu_device *adev)
+{
+	int ret = 0;
+	int rb_bufsz;
+	u32 interrupt_cntl, ih_cntl, ih_rb_cntl;
+	u64 wptr_off;
+
+	/* disable irqs */
+	cz_ih_disable_interrupts(adev);
+
+	/* setup interrupt control */
+	WREG32(mmINTERRUPT_CNTL2, adev->dummy_page.addr >> 8);
+	interrupt_cntl = RREG32(mmINTERRUPT_CNTL);
+	/* INTERRUPT_CNTL__IH_DUMMY_RD_OVERRIDE_MASK=0 - dummy read disabled with msi, enabled without msi
+	 * INTERRUPT_CNTL__IH_DUMMY_RD_OVERRIDE_MASK=1 - dummy read controlled by IH_DUMMY_RD_EN
+	 */
+	interrupt_cntl = REG_SET_FIELD(interrupt_cntl, INTERRUPT_CNTL, IH_DUMMY_RD_OVERRIDE, 0);
+	/* INTERRUPT_CNTL__IH_REQ_NONSNOOP_EN_MASK=1 if ring is in non-cacheable memory, e.g., vram */
+	interrupt_cntl = REG_SET_FIELD(interrupt_cntl, INTERRUPT_CNTL, IH_REQ_NONSNOOP_EN, 0);
+	WREG32(mmINTERRUPT_CNTL, interrupt_cntl);
+
+	/* Ring Buffer base. [39:8] of 40-bit address of the beginning of the ring buffer*/
+	WREG32(mmIH_RB_BASE, adev->irq.ih.gpu_addr >> 8);
+
+	rb_bufsz = order_base_2(adev->irq.ih.ring_size / 4);
+	ih_rb_cntl = REG_SET_FIELD(0, IH_RB_CNTL, WPTR_OVERFLOW_ENABLE, 1);
+	ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, WPTR_OVERFLOW_CLEAR, 1);
+	ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, RB_SIZE, rb_bufsz);
+
+	/* Ring Buffer write pointer writeback. If enabled, IH_RB_WPTR register value is written to memory */
+	ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, WPTR_WRITEBACK_ENABLE, 1);
+
+	/* set the writeback address whether it's enabled or not */
+	wptr_off = adev->wb.gpu_addr + (adev->irq.ih.wptr_offs * 4);
+	WREG32(mmIH_RB_WPTR_ADDR_LO, lower_32_bits(wptr_off));
+	WREG32(mmIH_RB_WPTR_ADDR_HI, upper_32_bits(wptr_off) & 0xFF);
+
+	WREG32(mmIH_RB_CNTL, ih_rb_cntl);
+
+	/* set rptr, wptr to 0 */
+	WREG32(mmIH_RB_RPTR, 0);
+	WREG32(mmIH_RB_WPTR, 0);
+
+	/* Default settings for IH_CNTL (disabled at first) */
+	ih_cntl = RREG32(mmIH_CNTL);
+	ih_cntl = REG_SET_FIELD(ih_cntl, IH_CNTL, MC_VMID, 0);
+
+	if (adev->irq.msi_enabled)
+		ih_cntl = REG_SET_FIELD(ih_cntl, IH_CNTL, RPTR_REARM, 1);
+	WREG32(mmIH_CNTL, ih_cntl);
+
+	pci_set_master(adev->pdev);
+
+	/* enable interrupts */
+	cz_ih_enable_interrupts(adev);
+
+	return ret;
+}
+
+/**
+ * cz_ih_irq_disable - disable interrupts
+ *
+ * @adev: amdgpu_device pointer
+ *
+ * Disable interrupts on the hw (VI).
+ */
+static void cz_ih_irq_disable(struct amdgpu_device *adev)
+{
+	cz_ih_disable_interrupts(adev);
+
+	/* Wait and acknowledge irq */
+	mdelay(1);
+}
+
+/**
+ * cz_ih_get_wptr - get the IH ring buffer wptr
+ *
+ * @adev: amdgpu_device pointer
+ *
+ * Get the IH ring buffer wptr from either the register
+ * or the writeback memory buffer (VI).  Also check for
+ * ring buffer overflow and deal with it.
+ * Used by cz_irq_process(VI).
+ * Returns the value of the wptr.
+ */
+static u32 cz_ih_get_wptr(struct amdgpu_device *adev)
+{
+	u32 wptr, tmp;
+
+	wptr = le32_to_cpu(adev->wb.wb[adev->irq.ih.wptr_offs]);
+
+	if (REG_GET_FIELD(wptr, IH_RB_WPTR, RB_OVERFLOW)) {
+		wptr = REG_SET_FIELD(wptr, IH_RB_WPTR, RB_OVERFLOW, 0);
+		/* When a ring buffer overflow happen start parsing interrupt
+		 * from the last not overwritten vector (wptr + 16). Hopefully
+		 * this should allow us to catchup.
+		 */
+		dev_warn(adev->dev, "IH ring buffer overflow (0x%08X, 0x%08X, 0x%08X)\n",
+			wptr, adev->irq.ih.rptr, (wptr + 16) & adev->irq.ih.ptr_mask);
+		adev->irq.ih.rptr = (wptr + 16) & adev->irq.ih.ptr_mask;
+		tmp = RREG32(mmIH_RB_CNTL);
+		tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, WPTR_OVERFLOW_CLEAR, 1);
+		WREG32(mmIH_RB_CNTL, tmp);
+	}
+	return (wptr & adev->irq.ih.ptr_mask);
+}
+
+/**
+ * cz_ih_decode_iv - decode an interrupt vector
+ *
+ * @adev: amdgpu_device pointer
+ *
+ * Decodes the interrupt vector at the current rptr
+ * position and also advance the position.
+ */
+static void cz_ih_decode_iv(struct amdgpu_device *adev,
+				 struct amdgpu_iv_entry *entry)
+{
+	/* wptr/rptr are in bytes! */
+	u32 ring_index = adev->irq.ih.rptr >> 2;
+	uint32_t dw[4];
+	
+	dw[0] = le32_to_cpu(adev->irq.ih.ring[ring_index + 0]);
+	dw[1] = le32_to_cpu(adev->irq.ih.ring[ring_index + 1]);
+	dw[2] = le32_to_cpu(adev->irq.ih.ring[ring_index + 2]);
+	dw[3] = le32_to_cpu(adev->irq.ih.ring[ring_index + 3]);
+
+	entry->src_id = dw[0] & 0xff;
+	entry->src_data = dw[1] & 0xfffffff;
+	entry->ring_id = dw[2] & 0xff;
+	entry->vm_id = (dw[2] >> 8) & 0xff;
+	entry->pas_id = (dw[2] >> 16) & 0xffff;
+
+	/* wptr/rptr are in bytes! */
+	adev->irq.ih.rptr += 16;
+}
+
+/**
+ * cz_ih_set_rptr - set the IH ring buffer rptr
+ *
+ * @adev: amdgpu_device pointer
+ *
+ * Set the IH ring buffer rptr.
+ */
+static void cz_ih_set_rptr(struct amdgpu_device *adev)
+{
+	WREG32(mmIH_RB_RPTR, adev->irq.ih.rptr);
+}
+
+static int cz_ih_early_init(void *handle)
+{
+	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+
+	cz_ih_set_interrupt_funcs(adev);
+	return 0;
+}
+
+static int cz_ih_sw_init(void *handle)
+{
+	int r;
+	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+
+	r = amdgpu_ih_ring_init(adev, 64 * 1024, false);
+	if (r)
+		return r;
+
+	r = amdgpu_irq_init(adev);
+
+	return r;
+}
+
+static int cz_ih_sw_fini(void *handle)
+{
+	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+
+	amdgpu_irq_fini(adev);
+	amdgpu_ih_ring_fini(adev);
+
+	return 0;
+}
+
+static int cz_ih_hw_init(void *handle)
+{
+	int r;
+	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+
+	r = cz_ih_irq_init(adev);
+	if (r)
+		return r;
+
+	return 0;
+}
+
+static int cz_ih_hw_fini(void *handle)
+{
+	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+
+	cz_ih_irq_disable(adev);
+
+	return 0;
+}
+
+static int cz_ih_suspend(void *handle)
+{
+	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+
+	return cz_ih_hw_fini(adev);
+}
+
+static int cz_ih_resume(void *handle)
+{
+	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+
+	return cz_ih_hw_init(adev);
+}
+
+static bool cz_ih_is_idle(void *handle)
+{
+	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+	u32 tmp = RREG32(mmSRBM_STATUS);
+
+	if (REG_GET_FIELD(tmp, SRBM_STATUS, IH_BUSY))
+		return false;
+
+	return true;
+}
+
+static int cz_ih_wait_for_idle(void *handle)
+{
+	unsigned i;
+	u32 tmp;
+	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+
+	for (i = 0; i < adev->usec_timeout; i++) {
+		/* read MC_STATUS */
+		tmp = RREG32(mmSRBM_STATUS);
+		if (!REG_GET_FIELD(tmp, SRBM_STATUS, IH_BUSY))
+			return 0;
+		udelay(1);
+	}
+	return -ETIMEDOUT;
+}
+
+static void cz_ih_print_status(void *handle)
+{
+	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+
+	dev_info(adev->dev, "CZ IH registers\n");
+	dev_info(adev->dev, "  SRBM_STATUS=0x%08X\n",
+		RREG32(mmSRBM_STATUS));
+	dev_info(adev->dev, "  SRBM_STATUS2=0x%08X\n",
+		RREG32(mmSRBM_STATUS2));
+	dev_info(adev->dev, "  INTERRUPT_CNTL=0x%08X\n",
+		 RREG32(mmINTERRUPT_CNTL));
+	dev_info(adev->dev, "  INTERRUPT_CNTL2=0x%08X\n",
+		 RREG32(mmINTERRUPT_CNTL2));
+	dev_info(adev->dev, "  IH_CNTL=0x%08X\n",
+		 RREG32(mmIH_CNTL));
+	dev_info(adev->dev, "  IH_RB_CNTL=0x%08X\n",
+		 RREG32(mmIH_RB_CNTL));
+	dev_info(adev->dev, "  IH_RB_BASE=0x%08X\n",
+		 RREG32(mmIH_RB_BASE));
+	dev_info(adev->dev, "  IH_RB_WPTR_ADDR_LO=0x%08X\n",
+		 RREG32(mmIH_RB_WPTR_ADDR_LO));
+	dev_info(adev->dev, "  IH_RB_WPTR_ADDR_HI=0x%08X\n",
+		 RREG32(mmIH_RB_WPTR_ADDR_HI));
+	dev_info(adev->dev, "  IH_RB_RPTR=0x%08X\n",
+		 RREG32(mmIH_RB_RPTR));
+	dev_info(adev->dev, "  IH_RB_WPTR=0x%08X\n",
+		 RREG32(mmIH_RB_WPTR));
+}
+
+static int cz_ih_soft_reset(void *handle)
+{
+	u32 srbm_soft_reset = 0;
+	struct amdgpu_device *adev = (struct amdgpu_device *)handle;
+	u32 tmp = RREG32(mmSRBM_STATUS);
+
+	if (tmp & SRBM_STATUS__IH_BUSY_MASK)
+		srbm_soft_reset = REG_SET_FIELD(srbm_soft_reset, SRBM_SOFT_RESET,
+						SOFT_RESET_IH, 1);
+
+	if (srbm_soft_reset) {
+		cz_ih_print_status((void *)adev);
+
+		tmp = RREG32(mmSRBM_SOFT_RESET);
+		tmp |= srbm_soft_reset;
+		dev_info(adev->dev, "SRBM_SOFT_RESET=0x%08X\n", tmp);
+		WREG32(mmSRBM_SOFT_RESET, tmp);
+		tmp = RREG32(mmSRBM_SOFT_RESET);
+
+		udelay(50);
+
+		tmp &= ~srbm_soft_reset;
+		WREG32(mmSRBM_SOFT_RESET, tmp);
+		tmp = RREG32(mmSRBM_SOFT_RESET);
+
+		/* Wait a little for things to settle down */
+		udelay(50);
+
+		cz_ih_print_status((void *)adev);
+	}
+
+	return 0;
+}
+
+static int cz_ih_set_clockgating_state(void *handle,
+					  enum amd_clockgating_state state)
+{
+	// TODO
+	return 0;
+}
+
+static int cz_ih_set_powergating_state(void *handle,
+					  enum amd_powergating_state state)
+{
+	// TODO
+	return 0;
+}
+
+const struct amd_ip_funcs cz_ih_ip_funcs = {
+	.early_init = cz_ih_early_init,
+	.late_init = NULL,
+	.sw_init = cz_ih_sw_init,
+	.sw_fini = cz_ih_sw_fini,
+	.hw_init = cz_ih_hw_init,
+	.hw_fini = cz_ih_hw_fini,
+	.suspend = cz_ih_suspend,
+	.resume = cz_ih_resume,
+	.is_idle = cz_ih_is_idle,
+	.wait_for_idle = cz_ih_wait_for_idle,
+	.soft_reset = cz_ih_soft_reset,
+	.print_status = cz_ih_print_status,
+	.set_clockgating_state = cz_ih_set_clockgating_state,
+	.set_powergating_state = cz_ih_set_powergating_state,
+};
+
+static const struct amdgpu_ih_funcs cz_ih_funcs = {
+	.get_wptr = cz_ih_get_wptr,
+	.decode_iv = cz_ih_decode_iv,
+	.set_rptr = cz_ih_set_rptr
+};
+
+static void cz_ih_set_interrupt_funcs(struct amdgpu_device *adev)
+{
+	if (adev->irq.ih_funcs == NULL)
+		adev->irq.ih_funcs = &cz_ih_funcs;
+}
+