bcm27xx: update patches from RPi foundation

[openwrt/staging/luka.git] / target / linux / bcm27xx / patches-5.4 / 950-0351-v3d_gem-Kick-the-clock-so-firmware-knows-we-are-usin.patch

diff --git a/target/linux/bcm27xx/patches-5.4/950-0351-v3d_gem-Kick-the-clock-so-firmware-knows-we-are-usin.patch b/target/linux/bcm27xx/patches-5.4/950-0351-v3d_gem-Kick-the-clock-so-firmware-knows-we-are-usin.patch
new file mode 100644 (file)
index 0000000..1892a14
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0351-v3d_gem-Kick-the-clock-so-firmware-knows-we-are-usin.patch
@@ -0,0 +1,27 @@
+From dfc842c139ef08e21647c43c19c2a23090b65b27 Mon Sep 17 00:00:00 2001
+From: popcornmix <popcornmix@gmail.com>
+Date: Thu, 5 Sep 2019 17:59:14 +0100
+Subject: [PATCH] v3d_gem: Kick the clock so firmware knows we are
+ using firmware clock interface
+
+Setting the v3d clock to low value allows firmware to handle dvfs in case
+where v3d hardware is not being actively used (e.g. console use).
+
+Signed-off-by: popcornmix <popcornmix@gmail.com>
+---
+ drivers/gpu/drm/v3d/v3d_gem.c | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+--- a/drivers/gpu/drm/v3d/v3d_gem.c
++++ b/drivers/gpu/drm/v3d/v3d_gem.c
+@@ -918,6 +918,10 @@ v3d_gem_init(struct drm_device *dev)
+       mutex_init(&v3d->clk_lock);
+       INIT_DELAYED_WORK(&v3d->clk_down_work, v3d_clock_down_work);
+ 
++      /* kick the clock so firmware knows we are using firmware clock interface */
++      v3d_clock_up_get(v3d);
++      v3d_clock_up_put(v3d);
++
+       /* Note: We don't allocate address 0.  Various bits of HW
+        * treat 0 as special, such as the occlusion query counters
+        * where 0 means "disabled".