From 49a5fb1679952a76861bd2580f785e33e3de712c Mon Sep 17 00:00:00 2001 From: Mikko Perttunen Date: Mon, 29 Mar 2021 16:38:29 +0300 Subject: gpu: host1x: Show number of pending waiters in debugfs Show the number of pending waiters in the debugfs status file. This is useful for testing to verify that waiters do not leak or accumulate incorrectly. Signed-off-by: Mikko Perttunen Signed-off-by: Thierry Reding --- drivers/gpu/host1x/debug.c | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-) (limited to 'drivers/gpu/host1x') diff --git a/drivers/gpu/host1x/debug.c b/drivers/gpu/host1x/debug.c index 1b4997bda1c7..8a14880c61bb 100644 --- a/drivers/gpu/host1x/debug.c +++ b/drivers/gpu/host1x/debug.c @@ -69,6 +69,7 @@ static int show_channel(struct host1x_channel *ch, void *data, bool show_fifo) static void show_syncpts(struct host1x *m, struct output *o) { + struct list_head *pos; unsigned int i; host1x_debug_output(o, "---- syncpts ----\n"); @@ -76,12 +77,19 @@ static void show_syncpts(struct host1x *m, struct output *o) for (i = 0; i < host1x_syncpt_nb_pts(m); i++) { u32 max = host1x_syncpt_read_max(m->syncpt + i); u32 min = host1x_syncpt_load(m->syncpt + i); + unsigned int waiters = 0; - if (!min && !max) + spin_lock(&m->syncpt[i].intr.lock); + list_for_each(pos, &m->syncpt[i].intr.wait_head) + waiters++; + spin_unlock(&m->syncpt[i].intr.lock); + + if (!min && !max && !waiters) continue; - host1x_debug_output(o, "id %u (%s) min %d max %d\n", - i, m->syncpt[i].name, min, max); + host1x_debug_output(o, + "id %u (%s) min %d max %d (%d waiters)\n", + i, m->syncpt[i].name, min, max, waiters); } for (i = 0; i < host1x_syncpt_nb_bases(m); i++) { -- cgit v1.2.3