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drm/bridge: synopsys: dw-hdmi-qp: Fix hdmi is enabled twice during boot

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If hdmi uboot logo is disabled and hdmi resolution is HDMI 2.0
resolution(such as 4k60), hdmi->logo_plug_out will be set to true
and won't be clear before hdmi is enabled. After hdmi is enabled,
hdmi->disabled is set to false, and then mode_changed is set to
true. hdmi will be disabled and enabled again.

hdmi->logo_plug_out is mainly used to determine whether hdmi has
been plugged from the end of uboot to the completion of kernel
driver initialization when the uboot logo is enabled. So when
setting it to true, it is necessary to determine whether the
uboot logo is enabled.

Change-Id: I1256f7d5e531dcb3e3ed8209a7839019aadef32e
Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
This commit is contained in:
Algea Cao
2025-04-30 15:37:20 +08:00
committed by Tao Huang
parent 4924db6630
commit 9b1fbae396
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c
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@@ -3408,7 +3408,8 @@ static int dw_hdmi_connector_atomic_check(struct drm_connector *connector,
drm_scdc_readb(hdmi->ddc, SCDC_TMDS_CONFIG, &val);
/* if plug out before hdmi bind, reset hdmi */
if (vmode->mtmdsclock >= 340000000 && vmode->mpixelclock <= 600000000 &&
!(val & SCDC_TMDS_BIT_CLOCK_RATIO_BY_40) && !hdmi->force_kernel_output)
!(val & SCDC_TMDS_BIT_CLOCK_RATIO_BY_40) && !hdmi->force_kernel_output &&
hdmi->initialized)
hdmi->logo_plug_out = true;
}