mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-20 14:13:16 +00:00
20ea6adbf1
Build system: x86_64 Build-tested: bcm2708, bcm2709, bcm2710, bcm2711 Run-tested: bcm2708/RPiB+, bcm2709/RPi3B, bcm2710/RPi3B, bcm2711/RPi4B Signed-off-by: Marty Jones <mj8263788@gmail.com> Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
59 lines
2.1 KiB
Diff
59 lines
2.1 KiB
Diff
From 9d71b0d4e30692d0d186352b494ef4e70234ca7c Mon Sep 17 00:00:00 2001
|
|
From: Maxime Ripard <maxime@cerno.tech>
|
|
Date: Fri, 25 Mar 2022 17:09:41 +0100
|
|
Subject: [PATCH] drm/vc4: Make sure we don't end up with a core clock
|
|
too high
|
|
|
|
Following the clock rate range improvements to the clock framework,
|
|
trying to set a disjoint range on a clock will now result in an error.
|
|
|
|
Thus, we can't set a minimum rate higher than the maximum reported by
|
|
the firmware, or clk_set_min_rate() will fail.
|
|
|
|
Thus we need to clamp the rate we are about to ask for to the maximum
|
|
rate possible on that clock.
|
|
|
|
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
|
|
---
|
|
drivers/gpu/drm/vc4/vc4_kms.c | 14 +++++++++-----
|
|
1 file changed, 9 insertions(+), 5 deletions(-)
|
|
|
|
--- a/drivers/gpu/drm/vc4/vc4_kms.c
|
|
+++ b/drivers/gpu/drm/vc4/vc4_kms.c
|
|
@@ -354,6 +354,7 @@ static void vc4_atomic_commit_tail(struc
|
|
struct vc4_hvs_state *new_hvs_state;
|
|
struct drm_crtc *crtc;
|
|
struct vc4_hvs_state *old_hvs_state;
|
|
+ unsigned long max_clock_rate = clk_get_max_rate(hvs->core_clk);
|
|
unsigned int channel;
|
|
int i;
|
|
|
|
@@ -397,8 +398,8 @@ static void vc4_atomic_commit_tail(struc
|
|
if (vc4->hvs && vc4->hvs->hvs5) {
|
|
unsigned long state_rate = max(old_hvs_state->core_clock_rate,
|
|
new_hvs_state->core_clock_rate);
|
|
- unsigned long core_rate = max_t(unsigned long,
|
|
- 500000000, state_rate);
|
|
+ unsigned long core_rate = clamp_t(unsigned long, state_rate,
|
|
+ 500000000, max_clock_rate);
|
|
|
|
WARN_ON(clk_set_min_rate(hvs->core_clk, core_rate));
|
|
}
|
|
@@ -427,10 +428,13 @@ static void vc4_atomic_commit_tail(struc
|
|
drm_atomic_helper_cleanup_planes(dev, state);
|
|
|
|
if (vc4->hvs && vc4->hvs->hvs5) {
|
|
- drm_dbg(dev, "Running the core clock at %lu Hz\n",
|
|
- new_hvs_state->core_clock_rate);
|
|
+ unsigned long core_rate = min_t(unsigned long,
|
|
+ max_clock_rate,
|
|
+ new_hvs_state->core_clock_rate);
|
|
+
|
|
+ drm_dbg(dev, "Running the core clock at %lu Hz\n", core_rate);
|
|
|
|
- WARN_ON(clk_set_min_rate(hvs->core_clk, new_hvs_state->core_clock_rate));
|
|
+ WARN_ON(clk_set_min_rate(hvs->core_clk, core_rate));
|
|
|
|
drm_dbg(dev, "Core clock actual rate: %lu Hz\n",
|
|
clk_get_rate(hvs->core_clk));
|