From bca10db67bdaf15997a5a2a276e7aa9b6eea1393 Mon Sep 17 00:00:00 2001
From: Maxime Ripard <maxime@cerno.tech>
Date: Thu, 23 Sep 2021 20:50:13 +0200
Subject: drm/vc4: crtc: Make sure the HDMI controller is powered when
disabling
Git-commit: bca10db67bdaf15997a5a2a276e7aa9b6eea1393
Patch-mainline: v5.17-rc1
References: git-fixes
Since commit 875a4d536842 ("drm/vc4: drv: Disable the CRTC at boot
time"), during the initial setup of the driver we call into the VC4 HDMI
controller hooks to make sure the controller is properly disabled.
However, we were never making sure that the device was properly powered
while doing so. This never resulted in any (reported) issue in practice,
but since the introduction of commit 4209f03fcb8e ("drm/vc4: hdmi: Warn
if we access the controller while disabled") we get a loud complaint
when we do that kind of access.
Let's make sure we have the HDMI controller properly powered while
disabling it.
Fixes: 875a4d536842 ("drm/vc4: drv: Disable the CRTC at boot time")
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Reviewed-by: Nicolas Saenz Julienne <nsaenz@kernel.org>
Tested-by: Nicolas Saenz Julienne <nsaenz@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210923185013.826679-1-maxime@cerno.tech
Signed-off-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/vc4/vc4_crtc.c | 19 ++++++++++++++++++-
1 file changed, 18 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/vc4/vc4_crtc.c
+++ b/drivers/gpu/drm/vc4/vc4_crtc.c
@@ -32,6 +32,7 @@
#include <linux/clk.h>
#include <linux/component.h>
#include <linux/of_device.h>
+#include <linux/pm_runtime.h>
#include <drm/drm_atomic.h>
#include <drm/drm_atomic_helper.h>
@@ -42,6 +43,7 @@
#include <drm/drm_vblank.h>
#include "vc4_drv.h"
+#include "vc4_hdmi.h"
#include "vc4_regs.h"
#define HVS_FIFO_LATENCY_PIX 6
@@ -486,8 +488,10 @@ int vc4_crtc_disable_at_boot(struct drm_
enum vc4_encoder_type encoder_type;
const struct vc4_pv_data *pv_data;
struct drm_encoder *encoder;
+ struct vc4_hdmi *vc4_hdmi;
unsigned encoder_sel;
int channel;
+ int ret;
if (!(of_device_is_compatible(vc4_crtc->pdev->dev.of_node,
"brcm,bcm2711-pixelvalve2") ||
@@ -515,7 +519,20 @@ int vc4_crtc_disable_at_boot(struct drm_
if (WARN_ON(!encoder))
return 0;
- return vc4_crtc_disable(crtc, encoder, channel);
+ vc4_hdmi = encoder_to_vc4_hdmi(encoder);
+ ret = pm_runtime_resume_and_get(&vc4_hdmi->pdev->dev);
+ if (ret)
+ return ret;
+
+ ret = vc4_crtc_disable(crtc, encoder, channel);
+ if (ret)
+ return ret;
+
+ ret = pm_runtime_put(&vc4_hdmi->pdev->dev);
+ if (ret)
+ return ret;
+
+ return 0;
}
static void vc4_crtc_atomic_disable(struct drm_crtc *crtc,