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Merge pull request #5794 from jernejsk/cec-fix

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Allwinner: linux: Adjust invalidating CEC address
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CvH 2021-10-27 12:26:31 +02:00 committed by GitHub
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projects/Allwinner/patches/linux/0060-WIP-drm-bridge-synopsys-Fix-CEC-not-working-after-power.patch Normal file
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@ -0,0 +1,56 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Alex Bee <knaerzche@gmail.com>
Date: Fri, 22 Oct 2021 11:17:30 +0200
Subject: [PATCH] WIP: drm/bridge: synopsys: Fix CEC not working after
power-cyclying
This fixes standby -> power-on on Rockchip platform for, at least,
RK3288/RK3328/RK3399 where CEC wasn't working after powering on again.
It might differ for other phy implementations:
The whole HPD-detection part shoud be reworked and we should in general
avoid to rely in RX_SENSE phy status (at least for HDMI), since it differs
depending on sink's implementation.
Signed-off-by: Alex Bee <knaerzche@gmail.com>
---
drivers/gpu/drm/bridge/synopsys/dw-hdmi.c | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)
diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
index 84cc52858ffb..3c20ef3bd3c1 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi.c
@@ -3036,18 +3036,11 @@ static irqreturn_t dw_hdmi_irq(int irq, void *dev_id)
* ask the source to re-read the EDID.
*/
if (intr_stat &
- (HDMI_IH_PHY_STAT0_RX_SENSE | HDMI_IH_PHY_STAT0_HPD)) {
+ (HDMI_IH_PHY_STAT0_RX_SENSE | HDMI_IH_PHY_STAT0_HPD))
dw_hdmi_setup_rx_sense(hdmi,
phy_stat & HDMI_PHY_HPD,
phy_stat & HDMI_PHY_RX_SENSE);
- if ((phy_stat & (HDMI_PHY_RX_SENSE | HDMI_PHY_HPD)) == 0) {
- mutex_lock(&hdmi->cec_notifier_mutex);
- cec_notifier_phys_addr_invalidate(hdmi->cec_notifier);
- mutex_unlock(&hdmi->cec_notifier_mutex);
- }
- }
-
if (intr_stat & HDMI_IH_PHY_STAT0_HPD) {
enum drm_connector_status status = phy_int_pol & HDMI_PHY_HPD
? connector_status_connected
@@ -3061,6 +3054,13 @@ static irqreturn_t dw_hdmi_irq(int irq, void *dev_id)
drm_helper_hpd_irq_event(hdmi->bridge.dev);
drm_bridge_hpd_notify(&hdmi->bridge, status);
}
+
+ if (status == connector_status_disconnected &&
+ (phy_stat & HDMI_PHY_RX_SENSE)) {
+ mutex_lock(&hdmi->cec_notifier_mutex);
+ cec_notifier_phys_addr_invalidate(hdmi->cec_notifier);
+ mutex_unlock(&hdmi->cec_notifier_mutex);
+ }
}
hdmi_writeb(hdmi, intr_stat, HDMI_IH_PHY_STAT0);