From 106b4a2a78b2a2f14885604891957b84bba502db Mon Sep 17 00:00:00 2001 From: Adrian Betschart Date: Fri, 11 Sep 2026 17:13:14 +0200 Subject: drm/amd/display: Try RGB before YCbCr 4:4:4 in stream validation amdgpu_dm_create_validate_stream_for_sink() walks encoding_order[] and uses the first encoding that validates. YCbCr 4:4:4 is listed before RGB, so an HDMI sink that advertises 4:4:4 gets YCbCr 4:4:4 whenever the "color format" property is left at AUTO, even though RGB fits the same link. That contradicts the documented AUTO behaviour for HDMI in enum drm_connector_color_format (RGB, falling back to YCbCr 4:2:0 only when the bandwidth is not available or the mode is 4:2:0-only), which the amdgpu implementation of the property also describes. It also leaves the "Broadcast RGB" property without effect on such sinks, since the quantization range it selects only applies to RGB output. Try RGB first. The mask still holds every encoding the sink supports, so a mode that cannot carry RGB falls back exactly as before. For reference, v7.2 picked RGB here unless YCbCr 4:4:4 was forced through debugfs, while earlier kernels picked YCbCr 4:4:4 for any HDMI sink that advertised it. Fixes: 0b0ff65d3ca1 ("drm/amd/display: Refactor stream validation") Suggested-by: Adolfo Rodrigues Assisted-by: Claude Code:claude-fable-5-1 Signed-off-by: Adrian Betschart Reviewed-by: Fangzhi Zuo Tested-by: Adolfo Rodrigues Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher (cherry picked from commit 7de432bc753133764dc40d37f9388da56de251e7) --- arch/powerpc/sysdev/mpic.h | 60 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 60 insertions(+) create mode 100644 arch/powerpc/sysdev/mpic.h (limited to 'arch/powerpc/sysdev/mpic.h') diff --git a/arch/powerpc/sysdev/mpic.h b/arch/powerpc/sysdev/mpic.h new file mode 100644 index 000000000..bb460ff57 --- /dev/null +++ b/arch/powerpc/sysdev/mpic.h @@ -0,0 +1,60 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +#ifndef _POWERPC_SYSDEV_MPIC_H +#define _POWERPC_SYSDEV_MPIC_H + +/* + * Copyright 2006-2007, Michael Ellerman, IBM Corporation. + */ + +#ifdef CONFIG_PCI_MSI +extern void mpic_msi_reserve_hwirq(struct mpic *mpic, irq_hw_number_t hwirq); +int __init mpic_msi_init_allocator(struct mpic *mpic); +int __init mpic_u3msi_init(struct mpic *mpic); +#else +static inline void mpic_msi_reserve_hwirq(struct mpic *mpic, + irq_hw_number_t hwirq) +{ + return; +} + +static inline int mpic_u3msi_init(struct mpic *mpic) +{ + return -1; +} +#endif + +#if defined(CONFIG_PCI_MSI) && defined(CONFIG_PPC_PASEMI) +int __init mpic_pasemi_msi_init(struct mpic *mpic); +#else +static inline int mpic_pasemi_msi_init(struct mpic *mpic) { return -1; } +#endif + +extern int mpic_set_irq_type(struct irq_data *d, unsigned int flow_type); +extern void mpic_set_vector(unsigned int virq, unsigned int vector); +extern int mpic_set_affinity(struct irq_data *d, + const struct cpumask *cpumask, bool force); +extern void mpic_reset_core(int cpu); + +#ifdef CONFIG_FSL_SOC +extern int mpic_map_error_int(struct mpic *mpic, unsigned int virq, irq_hw_number_t hw); +void __init mpic_err_int_init(struct mpic *mpic, irq_hw_number_t irqnum); +int __init mpic_setup_error_int(struct mpic *mpic, int intvec); +#else +static inline int mpic_map_error_int(struct mpic *mpic, unsigned int virq, irq_hw_number_t hw) +{ + return 0; +} + + +static inline void mpic_err_int_init(struct mpic *mpic, irq_hw_number_t irqnum) +{ + return; +} + +static inline int mpic_setup_error_int(struct mpic *mpic, int intvec) +{ + return -1; +} +#endif + +#endif /* _POWERPC_SYSDEV_MPIC_H */ -- cgit v1.3.1