Merge branch 'linux-5.3' of git://github.com/skeggsb/linux into drm-next

nouveau fixes and TU116 enablement.

Signed-off-by: Dave Airlie <[email protected]>
From: Ben Skeggs <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/CACAvsv5hZ3B4S9cVTPd2-Ug7dMSasLPJrWMyoDo4MOg8cbXWkA@mail.gmail.com

Author: airlied

drivers/gpu/drm/nouveau/Kbuild

@@ -1,4 +1,4 @@
-# SPDX-License-Identifier: GPL-2.0
+# SPDX-License-Identifier: MIT
 ccflags-y += -I $(srctree)/$(src)/include
 ccflags-y += -I $(srctree)/$(src)/include/nvkm
 ccflags-y += -I $(srctree)/$(src)/nvkm

drivers/gpu/drm/nouveau/dispnv04/Kbuild

@@ -1,4 +1,4 @@
-# SPDX-License-Identifier: GPL-2.0
+# SPDX-License-Identifier: MIT
 nouveau-y += dispnv04/arb.o
 nouveau-y += dispnv04/crtc.o
 nouveau-y += dispnv04/cursor.o

drivers/gpu/drm/nouveau/dispnv04/cursor.c

@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0
+// SPDX-License-Identifier: MIT
 #include <drm/drmP.h>
 #include <drm/drm_mode.h>
 #include "nouveau_drv.h"

drivers/gpu/drm/nouveau/dispnv04/disp.h

@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0 */
+/* SPDX-License-Identifier: MIT */
 #ifndef __NV04_DISPLAY_H__
 #define __NV04_DISPLAY_H__
 #include <subdev/bios.h>

drivers/gpu/drm/nouveau/dispnv50/Kbuild

@@ -1,4 +1,4 @@
-# SPDX-License-Identifier: GPL-2.0
+# SPDX-License-Identifier: MIT
 nouveau-y += dispnv50/disp.o
 nouveau-y += dispnv50/lut.o
 

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

@@ -322,8 +322,13 @@ nv50_outp_atomic_check_view(struct drm_encoder *encoder,
 		switch (connector->connector_type) {
 		case DRM_MODE_CONNECTOR_LVDS:
 		case DRM_MODE_CONNECTOR_eDP:
-			/* Force use of scaler for non-EDID modes. */
-			if (adjusted_mode->type & DRM_MODE_TYPE_DRIVER)
+			/* Don't force scaler for EDID modes with
+			 * same size as the native one (e.g. different
+			 * refresh rate)
+			 */
+			if (adjusted_mode->hdisplay == native_mode->hdisplay &&
+			    adjusted_mode->vdisplay == native_mode->vdisplay &&
+			    adjusted_mode->type & DRM_MODE_TYPE_DRIVER)
 				break;
 			mode = native_mode;
 			asyc->scaler.full = true;

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

@@ -169,14 +169,34 @@ nv50_head_atomic_check_view(struct nv50_head_atom *armh,
 	 */
 	switch (mode) {
 	case DRM_MODE_SCALE_CENTER:
-		asyh->view.oW = min((u16)umode->hdisplay, asyh->view.oW);
-		asyh->view.oH = min((u16)umode_vdisplay, asyh->view.oH);
-		/* fall-through */
+		/* NOTE: This will cause scaling when the input is
+		 * larger than the output.
+		 */
+		asyh->view.oW = min(asyh->view.iW, asyh->view.oW);
+		asyh->view.oH = min(asyh->view.iH, asyh->view.oH);
+		break;
 	case DRM_MODE_SCALE_ASPECT:
-		if (asyh->view.oH < asyh->view.oW) {
+		/* Determine whether the scaling should be on width or on
+		 * height. This is done by comparing the aspect ratios of the
+		 * sizes. If the output AR is larger than input AR, that means
+		 * we want to change the width (letterboxed on the
+		 * left/right), otherwise on the height (letterboxed on the
+		 * top/bottom).
+		 *
+		 * E.g. 4:3 (1.333) AR image displayed on a 16:10 (1.6) AR
+		 * screen will have letterboxes on the left/right. However a
+		 * 16:9 (1.777) AR image on that same screen will have
+		 * letterboxes on the top/bottom.
+		 *
+		 * inputAR = iW / iH; outputAR = oW / oH
+		 * outputAR > inputAR is equivalent to oW * iH > iW * oH
+		 */
+		if (asyh->view.oW * asyh->view.iH > asyh->view.iW * asyh->view.oH) {
+			/* Recompute output width, i.e. left/right letterbox */
 			u32 r = (asyh->view.iW << 19) / asyh->view.iH;
 			asyh->view.oW = ((asyh->view.oH * r) + (r / 2)) >> 19;
 		} else {
+			/* Recompute output height, i.e. top/bottom letterbox */
 			u32 r = (asyh->view.iH << 19) / asyh->view.iW;
 			asyh->view.oH = ((asyh->view.oW * r) + (r / 2)) >> 19;
 		}

drivers/gpu/drm/nouveau/include/nvif/cl0002.h

@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0 */
+/* SPDX-License-Identifier: MIT */
 #ifndef __NVIF_CL0002_H__
 #define __NVIF_CL0002_H__
 

drivers/gpu/drm/nouveau/include/nvif/cl0046.h

@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0 */
+/* SPDX-License-Identifier: MIT */
 #ifndef __NVIF_CL0046_H__
 #define __NVIF_CL0046_H__
 

drivers/gpu/drm/nouveau/include/nvif/cl006b.h

@@ -1,4 +1,4 @@
-/* SPDX-License-Identifier: GPL-2.0 */
+/* SPDX-License-Identifier: MIT */
 #ifndef __NVIF_CL006B_H__
 #define __NVIF_CL006B_H__