mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-27 09:12:39 +00:00
011f2c26f1
As usual these patches were extracted and rebased from the raspberry pi repo: https://github.com/raspberrypi/linux/tree/rpi-4.4.y Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
58 lines
2.1 KiB
Diff
58 lines
2.1 KiB
Diff
From 45d87c13cbba1dc247108ef485e4449ba2be1672 Mon Sep 17 00:00:00 2001
|
|
From: Eric Anholt <eric@anholt.net>
|
|
Date: Thu, 21 Jul 2016 13:39:11 -0700
|
|
Subject: [PATCH] drm/vc4: Fix overflow mem unreferencing when the binner runs
|
|
dry.
|
|
|
|
Overflow memory handling is tricky: While it's still referenced by the
|
|
BPO registers, we want to keep it from being freed. When we are
|
|
putting a new set of overflow memory in the registers, we need to
|
|
assign the old one to the last rendering job using it.
|
|
|
|
We were looking at "what's currently running in the binner", but since
|
|
the bin/render submission split, we may end up with the binner
|
|
completing and having no new job while the renderer is still
|
|
processing. So, if we don't find a bin job at all, look at the
|
|
highest-seqno (last) render job to attach our overflow to.
|
|
|
|
Signed-off-by: Eric Anholt <eric@anholt.net>
|
|
Fixes: ca26d28bbaa3 ("drm/vc4: improve throughput by pipelining binning and rendering jobs")
|
|
Cc: stable@vger.kernel.org
|
|
---
|
|
drivers/gpu/drm/vc4/vc4_drv.h | 9 +++++++++
|
|
drivers/gpu/drm/vc4/vc4_irq.c | 4 +++-
|
|
2 files changed, 12 insertions(+), 1 deletion(-)
|
|
|
|
--- a/drivers/gpu/drm/vc4/vc4_drv.h
|
|
+++ b/drivers/gpu/drm/vc4/vc4_drv.h
|
|
@@ -329,6 +329,15 @@ vc4_first_render_job(struct vc4_dev *vc4
|
|
struct vc4_exec_info, head);
|
|
}
|
|
|
|
+static inline struct vc4_exec_info *
|
|
+vc4_last_render_job(struct vc4_dev *vc4)
|
|
+{
|
|
+ if (list_empty(&vc4->render_job_list))
|
|
+ return NULL;
|
|
+ return list_last_entry(&vc4->render_job_list,
|
|
+ struct vc4_exec_info, head);
|
|
+}
|
|
+
|
|
/**
|
|
* struct vc4_texture_sample_info - saves the offsets into the UBO for texture
|
|
* setup parameters.
|
|
--- a/drivers/gpu/drm/vc4/vc4_irq.c
|
|
+++ b/drivers/gpu/drm/vc4/vc4_irq.c
|
|
@@ -83,8 +83,10 @@ vc4_overflow_mem_work(struct work_struct
|
|
|
|
spin_lock_irqsave(&vc4->job_lock, irqflags);
|
|
current_exec = vc4_first_bin_job(vc4);
|
|
+ if (!current_exec)
|
|
+ current_exec = vc4_last_render_job(vc4);
|
|
if (current_exec) {
|
|
- vc4->overflow_mem->seqno = vc4->finished_seqno + 1;
|
|
+ vc4->overflow_mem->seqno = current_exec->seqno;
|
|
list_add_tail(&vc4->overflow_mem->unref_head,
|
|
¤t_exec->unref_list);
|
|
vc4->overflow_mem = NULL;
|