drm/nouveau/disp/r535: initial support

Adds support for modesetting on RM.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230918202149.4343-38-skeggsb@gmail.com

Author: Ben Skeggs

drivers/gpu/drm/nouveau/dispnv50/core.c

@@ -42,6 +42,7 @@ nv50_core_new(struct nouveau_drm *drm, struct nv50_core **pcore)
 		int version;
 		int (*new)(struct nouveau_drm *, s32, struct nv50_core **);
 	} cores[] = {
+		{ AD102_DISP_CORE_CHANNEL_DMA, 0, corec57d_new },
 		{ GA102_DISP_CORE_CHANNEL_DMA, 0, corec57d_new },
 		{ TU102_DISP_CORE_CHANNEL_DMA, 0, corec57d_new },
 		{ GV100_DISP_CORE_CHANNEL_DMA, 0, corec37d_new },

drivers/gpu/drm/nouveau/dispnv50/disp.c

@@ -1592,6 +1592,146 @@ nv50_sor_atomic_disable(struct drm_encoder *encoder, struct drm_atomic_state *st
 	nv_encoder->crtc = NULL;
 }
 
+// common/inc/displayport/displayport.h
+#define DP_CONFIG_WATERMARK_ADJUST                   2
+#define DP_CONFIG_WATERMARK_LIMIT                   20
+#define DP_CONFIG_INCREASED_WATERMARK_ADJUST         8
+#define DP_CONFIG_INCREASED_WATERMARK_LIMIT         22
+
+static bool
+nv50_sor_dp_watermark_sst(struct nouveau_encoder *outp,
+			  struct nv50_head *head, struct nv50_head_atom *asyh)
+{
+	bool enhancedFraming = outp->dp.dpcd[DP_MAX_LANE_COUNT] & DP_ENHANCED_FRAME_CAP;
+	u64 minRate = outp->dp.link_bw * 1000;
+	unsigned tuSize = 64;
+	unsigned waterMark;
+	unsigned hBlankSym;
+	unsigned vBlankSym;
+	unsigned watermarkAdjust = DP_CONFIG_WATERMARK_ADJUST;
+	unsigned watermarkMinimum = DP_CONFIG_WATERMARK_LIMIT;
+	// depth is multiplied by 16 in case of DSC enable
+	s32 hblank_symbols;
+	// number of link clocks per line.
+	int vblank_symbols	  = 0;
+	bool bEnableDsc = false;
+	unsigned surfaceWidth = asyh->mode.h.blanks - asyh->mode.h.blanke;
+	unsigned rasterWidth = asyh->mode.h.active;
+	unsigned depth = asyh->or.bpc * 3;
+	unsigned DSC_FACTOR = bEnableDsc ? 16 : 1;
+	u64 pixelClockHz = asyh->mode.clock * 1000;
+	u64 PrecisionFactor = 100000, ratioF, watermarkF;
+	u32 numLanesPerLink = outp->dp.link_nr;
+	u32 numSymbolsPerLine;
+	u32 BlankingBits;
+	u32 surfaceWidthPerLink;
+	u32 PixelSteeringBits;
+	u64 NumBlankingLinkClocks;
+	u32 MinHBlank;
+
+	if (outp->outp.info.dp.increased_wm) {
+		watermarkAdjust = DP_CONFIG_INCREASED_WATERMARK_ADJUST;
+		watermarkMinimum = DP_CONFIG_INCREASED_WATERMARK_LIMIT;
+	}
+
+	if ((pixelClockHz * depth) >= (8 * minRate * outp->dp.link_nr * DSC_FACTOR))
+	{
+		return false;
+	}
+
+	//
+	// For DSC, if (pclk * bpp) < (1/64 * orclk * 8 * lanes) then some TU may end up with
+	// 0 active symbols. This may cause HW hang. Bug 200379426
+	//
+	if ((bEnableDsc) &&
+		((pixelClockHz * depth) < ((8 * minRate * outp->dp.link_nr * DSC_FACTOR) / 64)))
+	{
+		return false;
+	}
+
+	//
+	//  Perform the SST calculation.
+	//	For auto mode the watermark calculation does not need to track accumulated error the
+	//	formulas for manual mode will not work.  So below calculation was extracted from the DTB.
+	//
+	ratioF = ((u64)pixelClockHz * depth * PrecisionFactor) / DSC_FACTOR;
+
+	ratioF /= 8 * (u64) minRate * outp->dp.link_nr;
+
+	if (PrecisionFactor < ratioF) // Assert if we will end up with a negative number in below
+		return false;
+
+	watermarkF = ratioF * tuSize * (PrecisionFactor - ratioF)  / PrecisionFactor;
+	waterMark = (unsigned)(watermarkAdjust + ((2 * (depth * PrecisionFactor / (8 * numLanesPerLink * DSC_FACTOR)) + watermarkF) / PrecisionFactor));
+
+	//
+	//  Bounds check the watermark
+	//
+	numSymbolsPerLine = (surfaceWidth * depth) / (8 * outp->dp.link_nr * DSC_FACTOR);
+
+	if (WARN_ON(waterMark > 39 || waterMark > numSymbolsPerLine))
+		return false;
+
+	//
+	//  Clamp the low side
+	//
+	if (waterMark < watermarkMinimum)
+		waterMark = watermarkMinimum;
+
+	//Bits to send BS/BE/Extra symbols due to pixel padding
+	//Also accounts for enhanced framing.
+	BlankingBits = 3*8*numLanesPerLink + (enhancedFraming ? 3*8*numLanesPerLink : 0);
+
+	//VBID/MVID/MAUD sent 4 times all the time
+	BlankingBits += 3*8*4;
+
+	surfaceWidthPerLink = surfaceWidth;
+
+	//Extra bits sent due to pixel steering
+	PixelSteeringBits = (surfaceWidthPerLink % numLanesPerLink) ? (((numLanesPerLink - surfaceWidthPerLink % numLanesPerLink) * depth) / DSC_FACTOR) : 0;
+
+	BlankingBits += PixelSteeringBits;
+	NumBlankingLinkClocks = (u64)BlankingBits * PrecisionFactor / (8 * numLanesPerLink);
+	MinHBlank = (u32)(NumBlankingLinkClocks * pixelClockHz/ minRate / PrecisionFactor);
+	MinHBlank += 12;
+
+	if (WARN_ON(MinHBlank > rasterWidth - surfaceWidth))
+		return false;
+
+	// Bug 702290 - Active Width should be greater than 60
+	if (WARN_ON(surfaceWidth <= 60))
+		return false;
+
+
+	hblank_symbols = (s32)(((u64)(rasterWidth - surfaceWidth - MinHBlank) * minRate) / pixelClockHz);
+
+	//reduce HBlank Symbols to account for secondary data packet
+	hblank_symbols -= 1; //Stuffer latency to send BS
+	hblank_symbols -= 3; //SPKT latency to send data to stuffer
+
+	hblank_symbols -= numLanesPerLink == 1 ? 9  : numLanesPerLink == 2 ? 6 : 3;
+
+	hBlankSym = (hblank_symbols < 0) ? 0 : hblank_symbols;
+
+	// Refer to dev_disp.ref for more information.
+	// # symbols/vblank = ((SetRasterBlankEnd.X + SetRasterSize.Width - SetRasterBlankStart.X - 40) * link_clk / pclk) - Y - 1;
+	// where Y = (# lanes == 4) 12 : (# lanes == 2) ? 21 : 39
+	if (surfaceWidth < 40)
+	{
+		vblank_symbols = 0;
+	}
+	else
+	{
+		vblank_symbols = (s32)(((u64)(surfaceWidth - 40) * minRate) /  pixelClockHz) - 1;
+
+		vblank_symbols -= numLanesPerLink == 1 ? 39  : numLanesPerLink == 2 ? 21 : 12;
+	}
+
+	vBlankSym = (vblank_symbols < 0) ? 0 : vblank_symbols;
+
+	return nvif_outp_dp_sst(&outp->outp, head->base.index, waterMark, hBlankSym, vBlankSym);
+}
+
 static void
 nv50_sor_atomic_enable(struct drm_encoder *encoder, struct drm_atomic_state *state)
 {
@@ -1679,6 +1819,7 @@ nv50_sor_atomic_enable(struct drm_encoder *encoder, struct drm_atomic_state *sta
 		break;
 	case DCB_OUTPUT_DP:
 		nouveau_dp_train(nv_encoder, false, mode->clock, asyh->or.bpc);
+		nv50_sor_dp_watermark_sst(nv_encoder, head, asyh);
 		depth = nv50_dp_bpc_to_depth(asyh->or.bpc);
 
 		if (nv_encoder->outp.or.link & 1)

drivers/gpu/drm/nouveau/include/nvif/class.h

@@ -104,6 +104,7 @@
 #define GV100_DISP                                    /* if0010.h */ 0x0000c370
 #define TU102_DISP                                    /* if0010.h */ 0x0000c570
 #define GA102_DISP                                    /* if0010.h */ 0x0000c670
+#define AD102_DISP                                    /* if0010.h */ 0x0000c770
 
 #define GV100_DISP_CAPS                                              0x0000c373
 
@@ -154,6 +155,7 @@
 #define GV100_DISP_CORE_CHANNEL_DMA                   /* if0014.h */ 0x0000c37d
 #define TU102_DISP_CORE_CHANNEL_DMA                   /* if0014.h */ 0x0000c57d
 #define GA102_DISP_CORE_CHANNEL_DMA                   /* if0014.h */ 0x0000c67d
+#define AD102_DISP_CORE_CHANNEL_DMA                   /* if0014.h */ 0x0000c77d
 
 #define NV50_DISP_OVERLAY_CHANNEL_DMA                 /* if0014.h */ 0x0000507e
 #define G82_DISP_OVERLAY_CHANNEL_DMA                  /* if0014.h */ 0x0000827e

drivers/gpu/drm/nouveau/include/nvkm/engine/disp.h

@@ -5,11 +5,29 @@
 #include <core/engine.h>
 #include <core/object.h>
 #include <core/event.h>
+#include <subdev/gsp.h>
 
 struct nvkm_disp {
 	const struct nvkm_disp_func *func;
 	struct nvkm_engine engine;
 
+	struct {
+		struct nvkm_gsp_client client;
+		struct nvkm_gsp_device device;
+
+		struct nvkm_gsp_object objcom;
+		struct nvkm_gsp_object object;
+
+#define NVKM_DPYID_PLUG   BIT(0)
+#define NVKM_DPYID_UNPLUG BIT(1)
+#define NVKM_DPYID_IRQ    BIT(2)
+		struct nvkm_event event;
+		struct nvkm_gsp_event hpd;
+		struct nvkm_gsp_event irq;
+
+		u32 assigned_sors;
+	} rm;
+
 	struct list_head heads;
 	struct list_head iors;
 	struct list_head outps;
@@ -69,4 +87,5 @@ int gp102_disp_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct
 int gv100_disp_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_disp **);
 int tu102_disp_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_disp **);
 int ga102_disp_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_disp **);
+int ad102_disp_new(struct nvkm_device *, enum nvkm_subdev_type, int inst, struct nvkm_disp **);
 #endif

drivers/gpu/drm/nouveau/include/nvkm/subdev/gsp.h

@@ -23,6 +23,9 @@ void nvkm_gsp_sg_free(struct nvkm_device *, struct sg_table *);
 
 typedef int (*nvkm_gsp_msg_ntfy_func)(void *priv, u32 fn, void *repv, u32 repc);
 
+struct nvkm_gsp_event;
+typedef void (*nvkm_gsp_event_func)(struct nvkm_gsp_event *, void *repv, u32 repc);
+
 struct nvkm_gsp {
 	const struct nvkm_gsp_func *func;
 	struct nvkm_subdev subdev;
@@ -150,6 +153,8 @@ struct nvkm_gsp {
 			} object;
 
 			struct nvkm_gsp *gsp;
+
+			struct list_head events;
 		} client;
 
 		struct nvkm_gsp_device {
@@ -191,6 +196,10 @@ struct nvkm_gsp {
 
 		int (*device_ctor)(struct nvkm_gsp_client *, struct nvkm_gsp_device *);
 		void (*device_dtor)(struct nvkm_gsp_device *);
+
+		int (*event_ctor)(struct nvkm_gsp_device *, u32 handle, u32 id,
+				  nvkm_gsp_event_func, struct nvkm_gsp_event *);
+		void (*event_dtor)(struct nvkm_gsp_event *);
 	} *rm;
 
 	struct {
@@ -399,6 +408,32 @@ nvkm_gsp_client_device_ctor(struct nvkm_gsp *gsp,
 	return ret;
 }
 
+struct nvkm_gsp_event {
+	struct nvkm_gsp_device *device;
+	u32 id;
+	nvkm_gsp_event_func func;
+
+	struct nvkm_gsp_object object;
+
+	struct list_head head;
+};
+
+static inline int
+nvkm_gsp_device_event_ctor(struct nvkm_gsp_device *device, u32 handle, u32 id,
+			   nvkm_gsp_event_func func, struct nvkm_gsp_event *event)
+{
+	return device->object.client->gsp->rm->event_ctor(device, handle, id, func, event);
+}
+
+static inline void
+nvkm_gsp_event_dtor(struct nvkm_gsp_event *event)
+{
+	struct nvkm_gsp_device *device = event->device;
+
+	if (device)
+		device->object.client->gsp->rm->event_dtor(event);
+}
+
 int nvkm_gsp_intr_stall(struct nvkm_gsp *, enum nvkm_subdev_type, int);
 int nvkm_gsp_intr_nonstall(struct nvkm_gsp *, enum nvkm_subdev_type, int);
 

drivers/gpu/drm/nouveau/include/nvrm/535.54.03/common/sdk/nvidia/inc/class/cl0005.h

@@ -0,0 +1,38 @@
+#ifndef __src_common_sdk_nvidia_inc_class_cl0005_h__
+#define __src_common_sdk_nvidia_inc_class_cl0005_h__
+
+/* Excerpt of RM headers from https://github.com/NVIDIA/open-gpu-kernel-modules/tree/535.54.03 */
+
+/*
+ * SPDX-FileCopyrightText: Copyright (c) 2001-2022 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+ * SPDX-License-Identifier: MIT
+ *
+ * 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 AUTHORS OR COPYRIGHT HOLDERS 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.
+ */
+
+typedef struct NV0005_ALLOC_PARAMETERS {
+    NvHandle hParentClient;
+    NvHandle hSrcResource;
+
+    NvV32    hClass;
+    NvV32    notifyIndex;
+    NV_DECLARE_ALIGNED(NvP64 data, 8);
+} NV0005_ALLOC_PARAMETERS;
+
+#endif

drivers/gpu/drm/nouveau/include/nvrm/535.54.03/common/sdk/nvidia/inc/class/cl2080_notification.h

@@ -0,0 +1,42 @@
+#ifndef __src_common_sdk_nvidia_inc_class_cl2080_notification_h__
+#define __src_common_sdk_nvidia_inc_class_cl2080_notification_h__
+
+/* Excerpt of RM headers from https://github.com/NVIDIA/open-gpu-kernel-modules/tree/535.54.03 */
+
+/*
+ * SPDX-FileCopyrightText: Copyright (c) 2022 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+ * SPDX-License-Identifier: MIT
+ *
+ * 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 AUTHORS OR COPYRIGHT HOLDERS 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.
+ */
+
+#define NV2080_NOTIFIERS_HOTPLUG                                   (1)
+
+#define NV2080_NOTIFIERS_DP_IRQ                                    (7)
+
+typedef struct {
+    NvU32 plugDisplayMask;
+    NvU32 unplugDisplayMask;
+} Nv2080HotplugNotification;
+
+typedef struct Nv2080DpIrqNotificationRec {
+    NvU32 displayId;
+} Nv2080DpIrqNotification;
+
+#endif

drivers/gpu/drm/nouveau/include/nvrm/535.54.03/common/sdk/nvidia/inc/ctrl/ctrl0073/ctrl0073common.h

@@ -0,0 +1,39 @@
+#ifndef __src_common_sdk_nvidia_inc_ctrl_ctrl0073_ctrl0073common_h__
+#define __src_common_sdk_nvidia_inc_ctrl_ctrl0073_ctrl0073common_h__
+
+/* Excerpt of RM headers from https://github.com/NVIDIA/open-gpu-kernel-modules/tree/535.54.03 */
+
+/*
+ * SPDX-FileCopyrightText: Copyright (c) 2022 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+ * SPDX-License-Identifier: MIT
+ *
+ * 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 AUTHORS OR COPYRIGHT HOLDERS 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.
+ */
+
+typedef struct NV0073_CTRL_CMD_DSC_CAP_PARAMS {
+    NvBool bDscSupported;
+    NvU32  encoderColorFormatMask;
+    NvU32  lineBufferSizeKB;
+    NvU32  rateBufferSizeKB;
+    NvU32  bitsPerPixelPrecision;
+    NvU32  maxNumHztSlices;
+    NvU32  lineBufferBitDepth;
+} NV0073_CTRL_CMD_DSC_CAP_PARAMS;
+
+#endif