- Enable Tiny DRM on ARM platforms

- ARM config updates
- General config cleanups
- Add patch to fix desktop lockups on RPi (vc4) RHBZ# 1389163

1 files changed, 59 insertions, 0 deletions

diff --git a/vc4-fix-vblank-cursor-update-issue.patch b/vc4-fix-vblank-cursor-update-issue.patch
new file mode 100644
index 000000000..8537d67ca
--- /dev/null
+++ b/vc4-fix-vblank-cursor-update-issue.patch
@@ -0,0 +1,59 @@
+From 6d24c1c5918907ab78a5729b78c0d165deb3cc2b Mon Sep 17 00:00:00 2001
+From: Michael Zoran <mzoran@crowfest.net>
+Date: Thu, 23 Feb 2017 17:54:31 -0800
+Subject: drm/vc4: Don't wait for vblank when updating the cursor
+
+Commonly used desktop environments such as xfce4 and gnome
+on debian sid can flood the graphics drivers with cursor
+updates.  Because the current implementation is waiting
+for a vblank between cursor updates, this will cause the
+display to hang for a long time since a typical refresh
+rate is only 60Hz.
+
+This is unnecessary and unexpected by user mode software,
+so simply swap out the cursor frame buffer without waiting.
+
+Signed-off-by: Michael Zoran <mzoran@crowfest.net>
+Reviewed-by: Eric Anholt <eric@anholt.net>
+Link: http://patchwork.freedesktop.org/patch/msgid/20170224015431.24583-1-mzoran@crowfest.net
+
+diff --git a/drivers/gpu/drm/vc4/vc4_plane.c b/drivers/gpu/drm/vc4/vc4_plane.c
+index f7a229d..110224c 100644
+--- a/drivers/gpu/drm/vc4/vc4_plane.c
++++ b/drivers/gpu/drm/vc4/vc4_plane.c
+@@ -20,6 +20,7 @@
+ 
+ #include "vc4_drv.h"
+ #include "vc4_regs.h"
++#include "drm_atomic.h"
+ #include "drm_atomic_helper.h"
+ #include "drm_fb_cma_helper.h"
+ #include "drm_plane_helper.h"
+@@ -769,12 +770,6 @@ vc4_update_plane(struct drm_plane *plane,
+ 	if (!plane_state)
+ 		goto out;
+ 
+-	/* If we're changing the cursor contents, do that in the
+-	 * normal vblank-synced atomic path.
+-	 */
+-	if (fb != plane_state->fb)
+-		goto out;
+-
+ 	/* No configuring new scaling in the fast path. */
+ 	if (crtc_w != plane_state->crtc_w ||
+ 	    crtc_h != plane_state->crtc_h ||
+@@ -783,6 +778,11 @@ vc4_update_plane(struct drm_plane *plane,
+ 		goto out;
+ 	}
+ 
++	if (fb != plane_state->fb) {
++		drm_atomic_set_fb_for_plane(plane->state, fb);
++		vc4_plane_async_set_fb(plane, fb);
++	}
++
+ 	/* Set the cursor's position on the screen.  This is the
+ 	 * expected change from the drm_mode_cursor_universal()
+ 	 * helper.
+-- 
+cgit v0.10.2
+