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Subject[PATCH 4.19 005/118] drm/pl111: Initialize clock spinlock early
[ Upstream commit 3e01ae2612bdd7975c74ec7123d7f8f5e6eed795 ]

The following warning is seen on systems with broken clock divider.

INFO: trying to register non-static key.
the code is fine but needs lockdep annotation.
turning off the locking correctness validator.
CPU: 0 PID: 1 Comm: swapper Not tainted 5.1.0-09698-g1fb3b52 #1
Hardware name: ARM Integrator/CP (Device Tree)
[<c0011be8>] (unwind_backtrace) from [<c000ebb8>] (show_stack+0x10/0x18)
[<c000ebb8>] (show_stack) from [<c07d3fd0>] (dump_stack+0x18/0x24)
[<c07d3fd0>] (dump_stack) from [<c0060d48>] (register_lock_class+0x674/0x6f8)
[<c0060d48>] (register_lock_class) from [<c005de2c>]
[<c005de2c>] (__lock_acquire) from [<c0060408>] (lock_acquire+0x110/0x21c)
[<c0060408>] (lock_acquire) from [<c07f755c>] (_raw_spin_lock+0x34/0x48)
[<c07f755c>] (_raw_spin_lock) from [<c0536c8c>]
[<c0536c8c>] (pl111_display_enable) from [<c0502f54>]

Since commit eedd6033b4c8 ("drm/pl111: Support variants with broken clock
divider"), the spinlock is not initialized if the clock divider is broken.
Initialize it earlier to fix the problem.

Fixes: eedd6033b4c8 ("drm/pl111: Support variants with broken clock divider")
Cc: Linus Walleij <>
Signed-off-by: Guenter Roeck <>
Signed-off-by: Linus Walleij <>
Signed-off-by: Sasha Levin <>
drivers/gpu/drm/pl111/pl111_display.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/pl111/pl111_display.c b/drivers/gpu/drm/pl111/pl111_display.c
index 754f6b25f265..6d9f78612dee 100644
--- a/drivers/gpu/drm/pl111/pl111_display.c
+++ b/drivers/gpu/drm/pl111/pl111_display.c
@@ -531,14 +531,15 @@ pl111_init_clock_divider(struct drm_device *drm)
dev_err(drm->dev, "CLCD: unable to get clcdclk.\n");
return PTR_ERR(parent);
+ spin_lock_init(&priv->tim2_lock);
/* If the clock divider is broken, use the parent directly */
if (priv->variant->broken_clockdivider) {
priv->clk = parent;
return 0;
parent_name = __clk_get_name(parent);
- spin_lock_init(&priv->tim2_lock);
div->init = &init;

ret = devm_clk_hw_register(drm->dev, div);

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