linux-kernel - [PATCH 1/4] drm/vc4: hdmi: Mark the device as active if running

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Message-Id: <20210629125736.414467-2-maxime@cerno.tech>
Date:   Tue, 29 Jun 2021 14:57:33 +0200
From:   Maxime Ripard <maxime@...no.tech>
To:     dri-devel@...ts.freedesktop.org,
        Daniel Vetter <daniel.vetter@...el.com>,
        David Airlie <airlied@...ux.ie>,
        Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Maxime Ripard <maxime@...no.tech>
Cc:     linux-kernel@...r.kernel.org,
        bcm-kernel-feedback-list@...adcom.com,
        Boris Brezillon <bbrezillon@...nel.org>,
        Emma Anholt <emma@...olt.net>,
        Maxime Ripard <mripard@...nel.org>,
        Dave Stevenson <dave.stevenson@...pberrypi.com>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Nicolas Saenz Julienne <nsaenz@...nel.org>,
        Phil Elwell <phil@...pberrypi.com>,
        Tim Gover <tim.gover@...pberrypi.com>,
        Dom Cobley <dom@...pberrypi.com>,
        linux-rpi-kernel@...ts.infradead.org
Subject: [PATCH 1/4] drm/vc4: hdmi: Mark the device as active if running

If we detect the device as running we make sure we get the reference
count right for clocks, but we don't do as such for the runtime PM
count, let's call pm_runtime_enable to make sure it's accurate.

Fixes: 5b0060004236 ("drm/vc4: hdmi: Prevent clock unbalance")
Signed-off-by: Maxime Ripard <maxime@...no.tech>
---
 drivers/gpu/drm/vc4/vc4_hdmi.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c
index aab1b36ceb3c..707fe43ffeea 100644
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -2182,6 +2182,7 @@ static int vc4_hdmi_bind(struct device *dev, struct device *master, void *data)
 	if ((of_device_is_compatible(dev->of_node, "brcm,bcm2711-hdmi0") ||
 	     of_device_is_compatible(dev->of_node, "brcm,bcm2711-hdmi1")) &&
 	    HDMI_READ(HDMI_VID_CTL) & VC4_HD_VID_CTL_ENABLE) {
+		pm_runtime_set_active(dev);
 		clk_prepare_enable(vc4_hdmi->pixel_clock);
 		clk_prepare_enable(vc4_hdmi->hsm_clock);
 		clk_prepare_enable(vc4_hdmi->pixel_bvb_clock);
-- 
2.31.1