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* [PATCH] drm/nouveau: Accept 'legacy' format modifiers
@ 2020-07-17 18:57 ` James Jones
  0 siblings, 0 replies; 16+ messages in thread
From: James Jones @ 2020-07-17 18:57 UTC (permalink / raw)
  To: Dave Airlie, Daniel Vetter, Ben Skeggs, Kirill A . Shutemov
  Cc: Nouveau, dri-devel

Accept the DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK()
family of modifiers to handle broken userspace
Xorg modesetting and Mesa drivers.

Tested with Xorg 1.20 modesetting driver,
weston@c46c70dac84a4b3030cd05b380f9f410536690fc,
gnome & KDE wayland desktops from Ubuntu 18.04,
and sway 1.5

Signed-off-by: James Jones <jajones-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
---
 drivers/gpu/drm/nouveau/nouveau_display.c | 26 +++++++++++++++++++++--
 1 file changed, 24 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/nouveau/nouveau_display.c b/drivers/gpu/drm/nouveau/nouveau_display.c
index 496c4621cc78..31543086254b 100644
--- a/drivers/gpu/drm/nouveau/nouveau_display.c
+++ b/drivers/gpu/drm/nouveau/nouveau_display.c
@@ -191,8 +191,14 @@ nouveau_decode_mod(struct nouveau_drm *drm,
 		   uint32_t *tile_mode,
 		   uint8_t *kind)
 {
+	struct nouveau_display *disp = nouveau_display(drm->dev);
 	BUG_ON(!tile_mode || !kind);
 
+	if ((modifier & (0xffull << 12)) == 0ull) {
+		/* Legacy modifier.  Translate to this device's 'kind.' */
+		modifier |= disp->format_modifiers[0] & (0xffull << 12);
+	}
+
 	if (modifier == DRM_FORMAT_MOD_LINEAR) {
 		/* tile_mode will not be used in this case */
 		*tile_mode = 0;
@@ -227,6 +233,16 @@ nouveau_framebuffer_get_layout(struct drm_framebuffer *fb,
 	}
 }
 
+static const u64 legacy_modifiers[] = {
+	DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(0),
+	DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(1),
+	DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(2),
+	DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(3),
+	DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(4),
+	DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK(5),
+	DRM_FORMAT_MOD_INVALID
+};
+
 static int
 nouveau_validate_decode_mod(struct nouveau_drm *drm,
 			    uint64_t modifier,
@@ -247,8 +263,14 @@ nouveau_validate_decode_mod(struct nouveau_drm *drm,
 	     (disp->format_modifiers[mod] != modifier);
 	     mod++);
 
-	if (disp->format_modifiers[mod] == DRM_FORMAT_MOD_INVALID)
-		return -EINVAL;
+	if (disp->format_modifiers[mod] == DRM_FORMAT_MOD_INVALID) {
+		for (mod = 0;
+		     (legacy_modifiers[mod] != DRM_FORMAT_MOD_INVALID) &&
+		     (legacy_modifiers[mod] != modifier);
+		     mod++);
+		if (legacy_modifiers[mod] == DRM_FORMAT_MOD_INVALID)
+			return -EINVAL;
+	}
 
 	nouveau_decode_mod(drm, modifier, tile_mode, kind);
 
-- 
2.17.1

^ permalink raw reply related	[flat|nested] 16+ messages in thread

end of thread, other threads:[~2020-07-19 21:29 UTC | newest]

Thread overview: 16+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2020-07-17 18:57 [PATCH] drm/nouveau: Accept 'legacy' format modifiers James Jones
2020-07-17 18:57 ` James Jones
     [not found] ` <20200717185757.2786-1-jajones-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2020-07-17 19:03   ` James Jones
2020-07-17 19:03     ` James Jones
2020-07-17 19:47   ` Daniel Vetter
2020-07-17 19:47     ` Daniel Vetter
     [not found]     ` <20200717194751.GS3278063-dv86pmgwkMBes7Z6vYuT8azUEOm+Xw19@public.gmane.org>
2020-07-18  3:43       ` James Jones
2020-07-18  3:43         ` James Jones
     [not found]         ` <279b4b06-3f1e-9a5d-6bd8-c2518629bee1-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2020-07-19 21:28           ` Daniel Vetter
2020-07-19 21:28             ` Daniel Vetter
2020-07-17 21:30   ` Kirill A. Shutemov
2020-07-17 21:30     ` Kirill A. Shutemov
2020-07-18  3:13     ` James Jones
2020-07-18  3:13       ` James Jones
     [not found]       ` <ff5a8c9b-fe3d-48dd-93bc-3e1a18e0ff55-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2020-07-18  3:49         ` James Jones
2020-07-18  3:49           ` [Nouveau] " James Jones

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