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- From e1ee82fdfdba0b210974cf3ccc0048c5aeb83bc6 Mon Sep 17 00:00:00 2001
- From: Dave Stevenson <[email protected]>
- Date: Tue, 16 Nov 2021 10:34:34 +0000
- Subject: [PATCH] drm/vc4: Don't try disabling SCDC on Pi0-3.
- The code that set the scdc_enabled flag to ensure it was
- disabled at boot time also ran on Pi0-3 where there is no
- SCDC support. This lead to a warning in vc4_hdmi_encoder_post_crtc_disable
- due to vc4_hdmi_disable_scrambling being called and trying to
- read (and write) register HDMI_SCRAMBLER_CTL which doesn't
- exist on those platforms.
- Only set the flag should the interface be configured to support
- more than HDMI 1.4.
- Signed-off-by: Dave Stevenson <[email protected]>
- ---
- drivers/gpu/drm/vc4/vc4_hdmi.c | 3 ++-
- 1 file changed, 2 insertions(+), 1 deletion(-)
- --- a/drivers/gpu/drm/vc4/vc4_hdmi.c
- +++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
- @@ -2558,7 +2558,8 @@ static int vc4_hdmi_bind(struct device *
- * vc4_hdmi_disable_scrambling() will thus run at boot, make
- * sure it's disabled, and avoid any inconsistency.
- */
- - vc4_hdmi->scdc_enabled = true;
- + if (variant->max_pixel_clock > HDMI_14_MAX_TMDS_CLK)
- + vc4_hdmi->scdc_enabled = true;
-
- ret = variant->init_resources(vc4_hdmi);
- if (ret)
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