From: Maxime Ripard maxime@cerno.tech
stable inclusion from stable-5.10.51 commit 98bd09d928b370bf5d72a920974db7310404839c bugzilla: 175263 https://gitee.com/openeuler/kernel/issues/I4DT6F
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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commit 5b006000423667ef0f55721fc93e477b31f22d28 upstream.
Since we fixed the hooks to disable the encoder at boot, we now have an unbalanced clk_disable call at boot since we never enabled them in the first place.
Let's mimic the state of the hardware and enable the clocks at boot if the controller is enabled to get the use-count right.
Cc: stable@vger.kernel.org # v5.10+ Fixes: 09c438139b8f ("drm/vc4: hdmi: Implement finer-grained hooks") Signed-off-by: Maxime Ripard maxime@cerno.tech Reviewed-by: Dave Stevenson dave.stevenson@raspberrypi.com Link: https://patchwork.freedesktop.org/patch/msgid/20210507150515.257424-7-maxime... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
Signed-off-by: Chen Jun chenjun102@huawei.com Acked-by: Weilong Chen chenweilong@huawei.com Signed-off-by: Chen Jun chenjun102@huawei.com --- drivers/gpu/drm/vc4/vc4_hdmi.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c index 6a19a3de3962..c58b8840090a 100644 --- a/drivers/gpu/drm/vc4/vc4_hdmi.c +++ b/drivers/gpu/drm/vc4/vc4_hdmi.c @@ -1807,6 +1807,14 @@ static int vc4_hdmi_bind(struct device *dev, struct device *master, void *data) if (vc4_hdmi->variant->reset) vc4_hdmi->variant->reset(vc4_hdmi);
+ 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) { + clk_prepare_enable(vc4_hdmi->pixel_clock); + clk_prepare_enable(vc4_hdmi->hsm_clock); + clk_prepare_enable(vc4_hdmi->pixel_bvb_clock); + } + pm_runtime_enable(dev);
drm_simple_encoder_init(drm, encoder, DRM_MODE_ENCODER_TMDS);