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32 lines
1.1 KiB
Diff
32 lines
1.1 KiB
Diff
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From beadd8dfb16c626c2261fc6f8aab935cd7412603 Mon Sep 17 00:00:00 2001
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From: Maxime Ripard <maxime@cerno.tech>
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Date: Mon, 11 Jan 2021 15:23:01 +0100
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Subject: [PATCH] drm/vc4: hdmi: Update the CEC clock divider on HSM
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rate change
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As part of the enable sequence we might change the HSM clock rate if the
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pixel rate is different than the one we were already dealing with.
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On the BCM2835 however, the CEC clock derives from the HSM clock so any
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rate change will need to be reflected in the CEC clock divider to output
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40kHz.
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Fixes: cd4cb49dc5bb ("drm/vc4: hdmi: Adjust HSM clock rate depending on pixel rate")
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Reviewed-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
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Signed-off-by: Maxime Ripard <maxime@cerno.tech>
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---
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drivers/gpu/drm/vc4/vc4_hdmi.c | 2 ++
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1 file changed, 2 insertions(+)
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--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
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+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
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@@ -801,6 +801,8 @@ static void vc4_hdmi_encoder_pre_crtc_co
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vc4_hdmi_cec_update_clk_div(vc4_hdmi);
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+ vc4_hdmi_cec_update_clk_div(vc4_hdmi);
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+
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/*
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* FIXME: When the pixel freq is 594MHz (4k60), this needs to be setup
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* at 300MHz.
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