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, 182 insertions, 2 deletions

diff --git a/drivers/gpu/drm/i915/intel_atomic.c b/drivers/gpu/drm/i915/intel_atomic.c
index 3903b90fb64e..7ed8033aae60 100644
--- a/drivers/gpu/drm/i915/intel_atomic.c
+++ b/drivers/gpu/drm/i915/intel_atomic.c
@@ -48,6 +48,8 @@ int intel_atomic_check(struct drm_device *dev,
 	int ncrtcs = dev->mode_config.num_crtc;
 	int nconnectors = dev->mode_config.num_connector;
 	enum pipe nuclear_pipe = INVALID_PIPE;
+	struct intel_crtc *nuclear_crtc = NULL;
+	struct intel_crtc_state *crtc_state = NULL;
 	int ret;
 	int i;
 	bool not_nuclear = false;
@@ -76,8 +78,14 @@ int intel_atomic_check(struct drm_device *dev,
 	state->allow_modeset = false;
 	for (i = 0; i < ncrtcs; i++) {
 		struct intel_crtc *crtc = to_intel_crtc(state->crtcs[i]);
+		if (crtc)
+			memset(&crtc->atomic, 0, sizeof(crtc->atomic));
 		if (crtc && crtc->pipe != nuclear_pipe)
 			not_nuclear = true;
+		if (crtc && crtc->pipe == nuclear_pipe) {
+			nuclear_crtc = crtc;
+			crtc_state = to_intel_crtc_state(state->crtc_states[i]);
+		}
 	}
 	for (i = 0; i < nconnectors; i++)
 		if (state->connectors[i] != NULL)
@@ -92,6 +100,11 @@ int intel_atomic_check(struct drm_device *dev,
 	if (ret)
 		return ret;
 
+	/* FIXME: move to crtc atomic check function once it is ready */
+	ret = intel_atomic_setup_scalers(dev, nuclear_crtc, crtc_state);
+	if (ret)
+		return ret;
+
 	return ret;
 }
 
@@ -155,6 +168,21 @@ int intel_atomic_commit(struct drm_device *dev,
 		swap(state->plane_states[i], plane->state);
 		plane->state->state = NULL;
 	}
+
+	/* swap crtc_scaler_state */
+	for (i = 0; i < dev->mode_config.num_crtc; i++) {
+		struct drm_crtc *crtc = state->crtcs[i];
+		if (!crtc) {
+			continue;
+		}
+
+		to_intel_crtc(crtc)->config->scaler_state =
+			to_intel_crtc_state(state->crtc_states[i])->scaler_state;
+
+		if (INTEL_INFO(dev)->gen >= 9)
+			skl_detach_scalers(to_intel_crtc(crtc));
+	}
+
 	drm_atomic_helper_commit_planes(dev, state);
 	drm_atomic_helper_wait_for_vblanks(dev, state);
 	drm_atomic_helper_cleanup_planes(dev, state);
@@ -222,8 +250,12 @@ intel_crtc_duplicate_state(struct drm_crtc *crtc)
 		crtc_state = kmemdup(intel_crtc->config,
 				     sizeof(*intel_crtc->config), GFP_KERNEL);
 
-	if (crtc_state)
-		crtc_state->base.crtc = crtc;
+	if (!crtc_state)
+		return NULL;
+
+	__drm_atomic_helper_crtc_duplicate_state(crtc, &crtc_state->base);
+
+	crtc_state->base.crtc = crtc;
 
 	return &crtc_state->base;
 }
@@ -241,3 +273,151 @@ intel_crtc_destroy_state(struct drm_crtc *crtc,
 {
 	drm_atomic_helper_crtc_destroy_state(crtc, state);
 }
+
+/**
+ * intel_atomic_setup_scalers() - setup scalers for crtc per staged requests
+ * @dev: DRM device
+ * @crtc: intel crtc
+ * @crtc_state: incoming crtc_state to validate and setup scalers
+ *
+ * This function sets up scalers based on staged scaling requests for
+ * a @crtc and its planes. It is called from crtc level check path. If request
+ * is a supportable request, it attaches scalers to requested planes and crtc.
+ *
+ * This function takes into account the current scaler(s) in use by any planes
+ * not being part of this atomic state
+ *
+ *  Returns:
+ *         0 - scalers were setup succesfully
+ *         error code - otherwise
+ */
+int intel_atomic_setup_scalers(struct drm_device *dev,
+	struct intel_crtc *intel_crtc,
+	struct intel_crtc_state *crtc_state)
+{
+	struct drm_plane *plane = NULL;
+	struct intel_plane *intel_plane;
+	struct intel_plane_state *plane_state = NULL;
+	struct intel_crtc_scaler_state *scaler_state;
+	struct drm_atomic_state *drm_state;
+	int num_scalers_need;
+	int i, j;
+
+	if (INTEL_INFO(dev)->gen < 9 || !intel_crtc || !crtc_state)
+		return 0;
+
+	scaler_state = &crtc_state->scaler_state;
+	drm_state = crtc_state->base.state;
+
+	num_scalers_need = hweight32(scaler_state->scaler_users);
+	DRM_DEBUG_KMS("crtc_state = %p need = %d avail = %d scaler_users = 0x%x\n",
+		crtc_state, num_scalers_need, intel_crtc->num_scalers,
+		scaler_state->scaler_users);
+
+	/*
+	 * High level flow:
+	 * - staged scaler requests are already in scaler_state->scaler_users
+	 * - check whether staged scaling requests can be supported
+	 * - add planes using scalers that aren't in current transaction
+	 * - assign scalers to requested users
+	 * - as part of plane commit, scalers will be committed
+	 *   (i.e., either attached or detached) to respective planes in hw
+	 * - as part of crtc_commit, scaler will be either attached or detached
+	 *   to crtc in hw
+	 */
+
+	/* fail if required scalers > available scalers */
+	if (num_scalers_need > intel_crtc->num_scalers){
+		DRM_DEBUG_KMS("Too many scaling requests %d > %d\n",
+			num_scalers_need, intel_crtc->num_scalers);
+		return -EINVAL;
+	}
+
+	/* walkthrough scaler_users bits and start assigning scalers */
+	for (i = 0; i < sizeof(scaler_state->scaler_users) * 8; i++) {
+		int *scaler_id;
+
+		/* skip if scaler not required */
+		if (!(scaler_state->scaler_users & (1 << i)))
+			continue;
+
+		if (i == SKL_CRTC_INDEX) {
+			/* panel fitter case: assign as a crtc scaler */
+			scaler_id = &scaler_state->scaler_id;
+		} else {
+			if (!drm_state)
+				continue;
+
+			/* plane scaler case: assign as a plane scaler */
+			/* find the plane that set the bit as scaler_user */
+			plane = drm_state->planes[i];
+
+			/*
+			 * to enable/disable hq mode, add planes that are using scaler
+			 * into this transaction
+			 */
+			if (!plane) {
+				struct drm_plane_state *state;
+				plane = drm_plane_from_index(dev, i);
+				state = drm_atomic_get_plane_state(drm_state, plane);
+				if (IS_ERR(state)) {
+					DRM_DEBUG_KMS("Failed to add [PLANE:%d] to drm_state\n",
+						plane->base.id);
+					return PTR_ERR(state);
+				}
+			}
+
+			intel_plane = to_intel_plane(plane);
+
+			/* plane on different crtc cannot be a scaler user of this crtc */
+			if (WARN_ON(intel_plane->pipe != intel_crtc->pipe)) {
+				continue;
+			}
+
+			plane_state = to_intel_plane_state(drm_state->plane_states[i]);
+			scaler_id = &plane_state->scaler_id;
+		}
+
+		if (*scaler_id < 0) {
+			/* find a free scaler */
+			for (j = 0; j < intel_crtc->num_scalers; j++) {
+				if (!scaler_state->scalers[j].in_use) {
+					scaler_state->scalers[j].in_use = 1;
+					*scaler_id = scaler_state->scalers[j].id;
+					DRM_DEBUG_KMS("Attached scaler id %u.%u to %s:%d\n",
+						intel_crtc->pipe,
+						i == SKL_CRTC_INDEX ? scaler_state->scaler_id :
+							plane_state->scaler_id,
+						i == SKL_CRTC_INDEX ? "CRTC" : "PLANE",
+						i == SKL_CRTC_INDEX ?  intel_crtc->base.base.id :
+						plane->base.id);
+					break;
+				}
+			}
+		}
+
+		if (WARN_ON(*scaler_id < 0)) {
+			DRM_DEBUG_KMS("Cannot find scaler for %s:%d\n",
+				i == SKL_CRTC_INDEX ? "CRTC" : "PLANE",
+				i == SKL_CRTC_INDEX ? intel_crtc->base.base.id:plane->base.id);
+			continue;
+		}
+
+		/* set scaler mode */
+		if (num_scalers_need == 1 && intel_crtc->pipe != PIPE_C) {
+			/*
+			 * when only 1 scaler is in use on either pipe A or B,
+			 * scaler 0 operates in high quality (HQ) mode.
+			 * In this case use scaler 0 to take advantage of HQ mode
+			 */
+			*scaler_id = 0;
+			scaler_state->scalers[0].in_use = 1;
+			scaler_state->scalers[0].mode = PS_SCALER_MODE_HQ;
+			scaler_state->scalers[1].in_use = 0;
+		} else {
+			scaler_state->scalers[*scaler_id].mode = PS_SCALER_MODE_DYN;
+		}
+	}
+
+	return 0;
+}