The HDMI PHY in the BCM2711 HDMI controller is significantly more complicated to setup than in the older BCM283x SoCs.
Let's add hooks to enable and disable the PHY.
Signed-off-by: Maxime Ripard maxime@cerno.tech --- drivers/gpu/drm/vc4/Makefile | 1 + drivers/gpu/drm/vc4/vc4_hdmi.c | 14 +++++++------- drivers/gpu/drm/vc4/vc4_hdmi.h | 13 +++++++++++++ drivers/gpu/drm/vc4/vc4_hdmi_phy.c | 25 +++++++++++++++++++++++++ 4 files changed, 46 insertions(+), 7 deletions(-) create mode 100644 drivers/gpu/drm/vc4/vc4_hdmi_phy.c
diff --git a/drivers/gpu/drm/vc4/Makefile b/drivers/gpu/drm/vc4/Makefile index b303703bc7f3..d0163e18e9ca 100644 --- a/drivers/gpu/drm/vc4/Makefile +++ b/drivers/gpu/drm/vc4/Makefile @@ -12,6 +12,7 @@ vc4-y := \ vc4_kms.o \ vc4_gem.o \ vc4_hdmi.o \ + vc4_hdmi_phy.o \ vc4_vec.o \ vc4_hvs.o \ vc4_irq.o \ diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c index 80bc3dd9d4a8..068041145d1c 100644 --- a/drivers/gpu/drm/vc4/vc4_hdmi.c +++ b/drivers/gpu/drm/vc4/vc4_hdmi.c @@ -321,7 +321,9 @@ static void vc4_hdmi_encoder_disable(struct drm_encoder *encoder)
HDMI_WRITE(HDMI_RAM_PACKET_CONFIG, 0);
- HDMI_WRITE(HDMI_TX_PHY_RESET_CTL, 0xf << 16); + if (vc4_hdmi->variant->phy_disable) + vc4_hdmi->variant->phy_disable(vc4_hdmi); + HDMI_WRITE(HDMI_VID_CTL, HDMI_READ(HDMI_VID_CTL) & ~VC4_HD_VID_CTL_ENABLE);
@@ -381,12 +383,8 @@ static void vc4_hdmi_encoder_enable(struct drm_encoder *encoder) if (vc4_hdmi->variant->reset) vc4_hdmi->variant->reset(vc4_hdmi);
- /* PHY should be in reset, like - * vc4_hdmi_encoder_disable() does. - */ - HDMI_WRITE(HDMI_TX_PHY_RESET_CTL, 0xf << 16); - - HDMI_WRITE(HDMI_TX_PHY_RESET_CTL, 0); + if (vc4_hdmi->variant->phy_init) + vc4_hdmi->variant->phy_init(vc4_hdmi, mode);
if (debug_dump_regs) { struct drm_printer p = drm_info_printer(&vc4_hdmi->pdev->dev); @@ -1433,6 +1431,8 @@ static const struct vc4_hdmi_variant bcm2835_variant = {
.init_resources = vc4_hdmi_init_resources, .reset = vc4_hdmi_reset, + .phy_init = vc4_hdmi_phy_init, + .phy_disable = vc4_hdmi_phy_disable, };
static const struct of_device_id vc4_hdmi_dt_match[] = { diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.h b/drivers/gpu/drm/vc4/vc4_hdmi.h index 17a30589f39c..32c80161c786 100644 --- a/drivers/gpu/drm/vc4/vc4_hdmi.h +++ b/drivers/gpu/drm/vc4/vc4_hdmi.h @@ -21,6 +21,8 @@ to_vc4_hdmi_encoder(struct drm_encoder *encoder) return container_of(encoder, struct vc4_hdmi_encoder, base.base); }
+struct drm_display_mode; + struct vc4_hdmi; struct vc4_hdmi_register;
@@ -38,6 +40,13 @@ struct vc4_hdmi_variant {
/* Callback to reset the HDMI block */ void (*reset)(struct vc4_hdmi *vc4_hdmi); + + /* Callback to initialize the PHY according to the mode */ + void (*phy_init)(struct vc4_hdmi *vc4_hdmi, + struct drm_display_mode *mode); + + /* Callback to disable the PHY */ + void (*phy_disable)(struct vc4_hdmi *vc4_hdmi); };
/* HDMI audio information */ @@ -95,4 +104,8 @@ encoder_to_vc4_hdmi(struct drm_encoder *encoder) return container_of(_encoder, struct vc4_hdmi, encoder); }
+void vc4_hdmi_phy_init(struct vc4_hdmi *vc4_hdmi, + struct drm_display_mode *mode); +void vc4_hdmi_phy_disable(struct vc4_hdmi *vc4_hdmi); + #endif /* _VC4_HDMI_H_ */ diff --git a/drivers/gpu/drm/vc4/vc4_hdmi_phy.c b/drivers/gpu/drm/vc4/vc4_hdmi_phy.c new file mode 100644 index 000000000000..5a1746877bb5 --- /dev/null +++ b/drivers/gpu/drm/vc4/vc4_hdmi_phy.c @@ -0,0 +1,25 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2015 Broadcom + * Copyright (c) 2014 The Linux Foundation. All rights reserved. + * Copyright (C) 2013 Red Hat + * Author: Rob Clark robdclark@gmail.com + */ + +#include "vc4_hdmi.h" +#include "vc4_hdmi_regs.h" + +void vc4_hdmi_phy_init(struct vc4_hdmi *vc4_hdmi, struct drm_display_mode *mode) +{ + /* PHY should be in reset, like + * vc4_hdmi_encoder_disable() does. + */ + + HDMI_WRITE(HDMI_TX_PHY_RESET_CTL, 0xf << 16); + HDMI_WRITE(HDMI_TX_PHY_RESET_CTL, 0); +} + +void vc4_hdmi_phy_disable(struct vc4_hdmi *vc4_hdmi) +{ + HDMI_WRITE(HDMI_TX_PHY_RESET_CTL, 0xf << 16); +}