Fangzhi Zuo d04eb0c402 drm/amd/display: Prevent Gating DTBCLK before It Is Properly Latched ...

[why]
1. With allow_0_dtb_clk enabled, the time required to latch DTBCLK to 600 MHz
depends on the SMU. If DTBCLK is not latched to 600 MHz before set_mode completes,
gating DTBCLK causes the DP2 sink to lose its clock source.

2. The existing DTBCLK gating sequence ungates DTBCLK based on both pix_clk and ref_dtbclk,
but gates DTBCLK when either pix_clk or ref_dtbclk is zero.
pix_clk can be zero outside the set_mode sequence before DTBCLK is properly latched,
which can lead to DTBCLK being gated by mistake.

[how]
Consider both pixel_clk and ref_dtbclk when determining when it is safe to gate DTBCLK;
this is more accurate.

Reviewed-by: Charlene Liu <charlene.liu@amd.com>
Reviewed-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Fangzhi Zuo <Jerry.Zuo@amd.com>
Signed-off-by: Roman Li <roman.li@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

2025-10-13 14:14:32 -04:00

..

adp

drm: convert many bridge drivers from devm_kzalloc() to devm_drm_bridge_alloc() API

2025-05-23 15:03:47 +02:00

amd

drm/amd/display: Prevent Gating DTBCLK before It Is Properly Latched

2025-10-13 14:14:32 -04:00

arm

Merge tag 'drm-next-2025-07-30' of https://gitlab.freedesktop.org/drm/kernel

2025-07-30 19:26:49 -07:00

armada

drm/armada: Pass along the format info from .fb_create() to drm_helper_mode_fill_fb_struct()

2025-07-16 20:07:32 +03:00

aspeed

drm/aspeed: move to devm_platform_ioremap_resource() usage

2025-02-26 15:27:06 +01:00

ast

Merge tag 'drm-next-2025-10-01' of https://gitlab.freedesktop.org/drm/kernel

2025-10-02 12:47:25 -07:00

atmel-hlcdc

Merge tag 'drm-misc-next-2024-12-05' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-next

2024-12-13 08:48:09 +10:00

bridge

Merge tag 'drm-next-2025-10-01' of https://gitlab.freedesktop.org/drm/kernel

2025-10-02 12:47:25 -07:00

ci

drm/ci: Uprev igt

2025-07-04 11:06:38 -07:00

clients

drm/fbdev-client: Skip DRM clients if modesetting is absent

2025-07-06 14:05:07 +03:00

display

Merge tag 'media/v6.18-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media

2025-10-02 13:13:26 -07:00

etnaviv

Merge tag 'drm-next-2025-07-30' of https://gitlab.freedesktop.org/drm/kernel

2025-07-30 19:26:49 -07:00

exynos

drm/exynos: dsi: add support for exynos7870

2025-09-15 20:19:23 +09:00

fsl-dcu

drm/fsl-dcu: move to devm_platform_ioremap_resource() usage

2025-03-06 12:37:33 -05:00

gma500

Merge tag 'drm-next-2025-10-01' of https://gitlab.freedesktop.org/drm/kernel

2025-10-02 12:47:25 -07:00

gud

drm/gud: Replace simple display pipe with DRM atomic helpers

2025-09-01 08:42:51 +02:00

hisilicon

drm/hisilicon/hibmc: fix dp and vga cannot show together

2025-08-17 18:32:31 +03:00

hyperv

drm/hyperv: Add support for drm_panic

2025-06-05 14:59:56 +02:00

i915

Merge tag 'pull-fs_context' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2025-10-03 10:51:44 -07:00

imagination

drm/imagination: Enable PowerVR driver for RISC-V

2025-09-01 12:11:00 +01:00

imx

drm/imx: Add i.MX8qxp Display Controller KMS

2025-05-14 15:11:31 +08:00

ingenic

drm: Pass the format info to .fb_create()

2025-07-16 20:03:14 +03:00

kmb

Merge tag 'drm-misc-next-2024-12-05' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-next

2024-12-13 08:48:09 +10:00

lib

drm: Include <linux/export.h>

2025-06-16 09:01:23 +02:00

lima

Merge tag 'drm-next-2025-07-30' of https://gitlab.freedesktop.org/drm/kernel

2025-07-30 19:26:49 -07:00

logicvc

Merge tag 'drm-misc-next-2024-12-05' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-next

2024-12-13 08:48:09 +10:00

loongson

PCI: Add CONFIG_MMU dependency

2025-04-23 15:40:30 -05:00

mcde

drm/mcde: convert to devm_drm_bridge_alloc() API

2025-04-29 11:21:23 +02:00

mediatek

drm/mediatek: clean up driver data initialisation

2025-09-10 12:52:59 +00:00

meson

Merge tag 'drm-misc-next-2025-06-12' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-next

2025-06-18 08:09:35 +10:00

mgag200

Merge tag 'drm-next-2025-07-30' of https://gitlab.freedesktop.org/drm/kernel

2025-07-30 19:26:49 -07:00

msm

Merge tag 'drm-msm-next-2025-09-12' of https://gitlab.freedesktop.org/drm/msm into drm-next

2025-09-16 10:21:38 +10:00

mxsfb

drm/mxsfb: put the bridge returned by drm_bridge_chain_get_first_bridge()

2025-07-22 13:01:28 +02:00

nouveau

Merge tag 'drm-fixes-2025-10-11' of https://gitlab.freedesktop.org/drm/kernel

2025-10-10 13:59:38 -07:00

nova

Merge tag 'drm-rust-next-2025-09-16' of https://gitlab.freedesktop.org/drm/rust/kernel into drm-next

2025-09-17 16:13:49 +10:00

omapdrm

drm/omapdrm: use drm_bridge_chain_get_last_bridge()

2025-09-02 11:38:29 +02:00

panel

drm/panel-edp: Add 4 more panels needed by mt8189 Chromebooks

2025-09-08 08:55:42 -07:00

panfrost

Merge drm/drm-next into drm-misc-next

2025-08-20 09:33:06 +02:00

panthor

Merge tag 'drm-next-2025-10-01' of https://gitlab.freedesktop.org/drm/kernel

2025-10-02 12:47:25 -07:00

pl111

drm: pl111: fix inconsistent indenting warning

2025-03-07 10:25:10 +01:00

qxl

drm/gem: Pass along the format info from .fb_create() to drm_helper_mode_fill_fb_struct()

2025-07-16 20:05:58 +03:00

radeon

drm/radeon: use dev_warn_once() in CS parsers

2025-09-05 17:38:42 -04:00

renesas

drm/rcar-du: dsi: Implement DSI command support

2025-09-08 09:45:01 +03:00

rockchip

Merge tag 'drm-next-2025-10-01' of https://gitlab.freedesktop.org/drm/kernel

2025-10-02 12:47:25 -07:00

scheduler

drm/sched: Fix racy access to drm_sched_entity.dependency

2025-09-02 12:58:56 +02:00

sitronix

drm/st7571-i2c: add support for 2bit grayscale for XRGB8888

2025-09-01 15:35:29 +02:00

solomon

drm/ssd130x: Remove the use of dev_err_probe()

2025-09-01 16:09:19 +02:00

sprd

drm/sprd: move to devm_platform_ioremap_resource() usage

2025-03-10 16:25:01 -04:00

sti

drm/sti: Remove redundant ternary operators

2025-09-05 13:17:21 +02:00

stm

drm/stm: ltdc: handle lvds pixel clock

2025-08-28 17:43:57 +02:00

sun4i

drm: sun4i: de33: mixer: add mixer configuration for the H616

2025-06-02 09:59:10 +02:00

sysfb

drm/sysfb: Remove double assignment to pointer crtc_state

2025-09-04 09:26:39 +02:00

tegra

Revert "drm/tegra: Use dma_buf from GEM object instance"

2025-08-26 10:41:27 +02:00

tests

Merge tag 'v6.17-rc6' into drm-next

2025-09-15 17:51:07 +10:00

tidss

drm/tidss: dispc: Explicitly include bitfield.h

2025-09-03 12:16:04 +03:00

tilcdc

Merge tag 'drm-misc-next-2024-12-05' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-next

2024-12-13 08:48:09 +10:00

tiny

drm/tiny: pixpaper: Fix missing dependency on DRM_GEM_SHMEM_HELPER

2025-09-23 14:07:04 +02:00

ttm

ttm/bo: add an API to populate a bo before exporting.

2025-09-11 10:01:38 +10:00

tve200

Merge tag 'drm-misc-next-2024-12-05' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-next

2024-12-13 08:48:09 +10:00

tyr

rust: drm: Introduce the Tyr driver for Arm Mali GPUs

2025-09-11 12:20:03 +00:00

udl

drm/gem-shmem: Do not map s/g table by default

2025-07-07 15:23:41 +02:00

v3d

Merge tag 'drm-next-2025-10-11-1' of https://gitlab.freedesktop.org/drm/kernel

2025-10-10 14:02:14 -07:00

vboxvideo

drm/vboxvideo: Remove unused hgsmi_cursor_position

2025-02-28 09:05:10 +01:00

vc4

drm: Pass the format info to .fb_create()

2025-07-16 20:03:14 +03:00

vgem

drm/vgem/vgem_drv convert to use faux_device

2025-07-07 15:24:14 +02:00

virtio

drm/virtio: clean up minor codestyle issues

2025-08-20 13:36:45 +03:00

vkms

drm/vkms: Add P01* formats

2025-09-05 19:57:26 +02:00

vmwgfx

Merge tag 'drm-fixes-2025-10-11' of https://gitlab.freedesktop.org/drm/kernel

2025-10-10 13:59:38 -07:00

xe

Merge tag 'drm-next-2025-10-11-1' of https://gitlab.freedesktop.org/drm/kernel

2025-10-10 14:02:14 -07:00

xen

drm/gem: Pass along the format info from .fb_create() to drm_helper_mode_fill_fb_struct()

2025-07-16 20:05:58 +03:00

xlnx

Merge tag 'drm-next-2025-07-30' of https://gitlab.freedesktop.org/drm/kernel

2025-07-30 19:26:49 -07:00

drm_atomic_helper.c

drm/atomic-helper: put the bridge returned by drm_bridge_chain_get_first_bridge()

2025-07-22 13:01:28 +02:00

drm_atomic_state_helper.c

drm: Include <linux/export.h>

2025-06-16 09:01:23 +02:00

drm_atomic_uapi.c

drm: re-allow no-op changes on non-primary planes in async flips

2025-08-22 14:31:21 -03:00

drm_atomic.c

drm: Include <linux/export.h>

2025-06-16 09:01:23 +02:00

drm_auth.c

drm: Include <linux/export.h>

2025-06-16 09:01:23 +02:00

drm_blend.c

drm/doc: document front-buffer rendering

2025-04-30 23:35:00 +02:00

drm_bridge_helper.c

drm/bridge: Include <linux/export.h>

2025-06-16 09:02:25 +02:00

drm_bridge.c

drm/debugfs: bridges_show: show refcount

2025-09-02 11:18:55 +02:00

drm_buddy.c

Merge tag 'drm-next-2025-07-30' of https://gitlab.freedesktop.org/drm/kernel

2025-07-30 19:26:49 -07:00

drm_cache.c

drm/gpu: Remove dead checks on wbinvd_on_all_cpus()'s return value

2025-07-10 13:07:26 +02:00

drm_client_event.c

drm/client: Include <linux/export.h>

2025-06-16 09:02:29 +02:00

drm_client_modeset.c

drm/client: Include <linux/export.h>

2025-06-16 09:02:29 +02:00

drm_client.c

drm/client: Include <linux/export.h>

2025-06-16 09:02:29 +02:00

drm_color_mgmt.c

drm/color-mgmt: Prepare for RGB332 palettes

2025-08-26 09:54:18 +02:00

drm_connector.c

drm/connector: move HDR sink metadata to display info

2025-06-23 21:44:55 +03:00

drm_crtc_helper_internal.h

drm/connector: make mode_valid take a const struct drm_display_mode

2025-01-07 12:45:19 +02:00

drm_crtc_helper.c

drm: Remove redundant statement in drm_crtc_helper_set_mode()

2025-03-27 14:02:57 +02:00

drm_crtc_internal.h

drm/panic: Add a QR code panic screen

2024-08-23 16:55:35 +02:00

drm_crtc.c

drm: add clone mode check for CRTC

2025-01-08 01:39:58 +02:00

drm_damage_helper.c

drm: Include <linux/export.h>

2025-06-16 09:01:23 +02:00

drm_debugfs_crc.c

drm: Include <linux/export.h>

2025-06-16 09:01:23 +02:00

drm_debugfs.c

drm: add debugfs support on per client-id basis

2025-07-04 15:59:06 +02:00

drm_displayid_internal.h

drm/edid: Refactor DisplayID timing block structs

2025-04-16 20:40:51 +03:00

drm_displayid.c

…

drm_draw_internal.h

drm/panic: Move drawing functions to drm_draw

2024-12-10 14:36:41 +01:00

drm_draw.c

Merge drm/drm-next into drm-misc-next

2025-04-07 14:35:48 +02:00

drm_drv.c

Merge drm/drm-next into drm-intel-next

2025-09-10 08:01:42 -04:00

drm_dumb_buffers.c

…

drm_edid_load.c

…

drm_edid.c

Merge tag 'drm-misc-next-2025-06-26' of https://gitlab.freedesktop.org/drm/misc/kernel into drm-next

2025-06-27 09:58:05 +10:00

drm_eld.c

…

drm_encoder.c

…

drm_exec.c

drm: Include <linux/export.h>

2025-06-16 09:01:23 +02:00

drm_fb_dma_helper.c

drm: Include <linux/export.h>

2025-06-16 09:01:23 +02:00

drm_fb_helper.c

drm/client: Include <linux/export.h>

2025-06-16 09:02:29 +02:00

drm_fbdev_dma.c

drm/client: Include <linux/export.h>

2025-06-16 09:02:29 +02:00

drm_fbdev_shmem.c

drm/client: Include <linux/export.h>

2025-06-16 09:02:29 +02:00

drm_fbdev_ttm.c

drm/client: Include <linux/export.h>

2025-06-16 09:02:29 +02:00

drm_file.c

drm: add debugfs support on per client-id basis

2025-07-04 15:59:06 +02:00

drm_flip_work.c

drm: Include <linux/export.h>

2025-06-16 09:01:23 +02:00

drm_format_helper.c

drm/format-helper: introduce drm_fb_xrgb8888_to_gray2()

2025-09-01 15:35:07 +02:00

drm_format_internal.h

drm/format-helper: Split off byte swapping from drm_fb_xrgb8888_to_rgb565()

2025-06-27 15:59:23 +02:00

drm_fourcc.c

drm: Pass pixel_format+modifier directly to drm_get_format_info()

2025-07-16 20:01:13 +03:00

drm_framebuffer.c

Merge tag 'drm-next-2025-07-30' of https://gitlab.freedesktop.org/drm/kernel

2025-07-30 19:26:49 -07:00

drm_gem_atomic_helper.c

drm/gem: Include <linux/export.h>

2025-06-16 09:02:35 +02:00

drm_gem_dma_helper.c

Revert "drm/gem-dma: Use dma_buf from GEM object instance"

2025-07-17 12:26:19 +02:00

drm_gem_framebuffer_helper.c

Merge tag 'drm-next-2025-07-30' of https://gitlab.freedesktop.org/drm/kernel

2025-07-30 19:26:49 -07:00

drm_gem_shmem_helper.c

Merge tag 'drm-next-2025-07-30' of https://gitlab.freedesktop.org/drm/kernel

2025-07-30 19:26:49 -07:00

drm_gem_ttm_helper.c

drm/gem: Include <linux/export.h>

2025-06-16 09:02:35 +02:00

drm_gem_vram_helper.c

drm/gem: Include <linux/export.h>

2025-06-16 09:02:35 +02:00

drm_gem.c

Merge tag 'mm-stable-2025-10-01-19-00' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2025-10-02 18:18:33 -07:00

drm_gpusvm.c

drm/gpusvm, drm/xe: Fix userptr to not allow device private pages

2025-10-02 21:57:52 -07:00

drm_gpuvm.c

Merge tag 'drm-next-2025-10-01' of https://gitlab.freedesktop.org/drm/kernel

2025-10-02 12:47:25 -07:00

drm_internal.h

Merge drm/drm-next into drm-misc-n

2025-08-11 14:37:45 +02:00

drm_ioc32.c

…

drm_ioctl.c

drm: Add DRM prime interface to reassign GEM handle

2025-07-18 08:59:24 +02:00

drm_kms_helper_common.c

…

drm_lease.c

…

drm_managed.c

drm: Include <linux/export.h>

2025-06-16 09:01:23 +02:00

drm_mipi_dbi.c

drm/format-helper: Split off byte swapping from drm_fb_xrgb8888_to_rgb565()

2025-06-27 15:59:23 +02:00

drm_mipi_dsi.c

drm: Add MIPI read_multi func and two write macros

2025-08-14 15:42:26 -07:00

drm_mm.c

drm/mm: annotate drm_mm_node_scanned_block() with __maybe_unused

2024-09-04 12:15:46 +03:00

drm_mode_config.c

drm: Include <linux/export.h>

2025-06-16 09:01:23 +02:00

drm_mode_object.c

drm/tests: Add test for drm_framebuffer_free()

2024-09-11 14:17:11 +02:00

drm_modes.c

Merge tag 'v6.13-rc6' into drm-next

2025-01-10 14:24:17 +10:00

drm_modeset_helper.c

drm: Make passing of format info to drm_helper_mode_fill_fb_struct() mandatory

2025-07-16 20:12:35 +03:00

drm_modeset_lock.c

drm: Include <linux/export.h>

2025-06-16 09:01:23 +02:00

drm_of.c

drm: of: fix documentation reference

2025-08-21 16:21:08 +02:00

drm_pagemap.c

drm/pagemap: Allocate folios when possible

2025-08-06 13:34:58 +02:00

drm_panel_backlight_quirks.c

drm: panel-backlight-quirks: Add Steam Deck brightness quirk

2025-09-03 10:23:03 -05:00

drm_panel_orientation_quirks.c

drm/panel: Include <linux/export.h>

2025-06-16 09:02:39 +02:00

drm_panel.c

drm/panel: Allow powering on panel follower after panel is enabled

2025-08-25 09:17:49 -07:00

drm_panic_qr.rs

drm/panic: use core::ffi::CStr method names

2025-09-16 09:26:59 +02:00

drm_panic.c

drm: Include <linux/export.h>

2025-06-16 09:01:23 +02:00

drm_pci.c

drm: Do not include <linux/export.h>

2025-06-16 09:00:09 +02:00

drm_plane_helper.c

drm: Include <linux/export.h>

2025-06-16 09:01:23 +02:00

drm_plane.c

drm: Include <linux/export.h>

2025-06-16 09:01:23 +02:00

drm_prime.c

Merge drm/drm-next into drm-misc-n

2025-08-11 14:37:45 +02:00

drm_print.c

drm: Include <linux/export.h>

2025-06-16 09:01:23 +02:00

drm_privacy_screen_x86.c

…

drm_privacy_screen.c

drm: Include <linux/export.h>

2025-06-16 09:01:23 +02:00

drm_probe_helper.c

drm/probe-helper: put the bridge returned by drm_bridge_chain_get_first_bridge()

2025-07-22 13:01:28 +02:00

drm_property.c

…

drm_rect.c

drm: Fix kerneldoc for "Returns" section

2024-08-26 16:40:09 +02:00

drm_self_refresh_helper.c

drm: Include <linux/export.h>

2025-06-16 09:01:23 +02:00

drm_simple_kms_helper.c

drm: Include <linux/export.h>

2025-06-16 09:01:23 +02:00

drm_suballoc.c

drm: Include <linux/export.h>

2025-06-16 09:01:23 +02:00

drm_syncobj.c

drm: Include <linux/export.h>

2025-06-16 09:01:23 +02:00

drm_sysfs.c

DRM: Add a new 'boot_display' attribute

2025-09-10 09:35:33 -05:00

drm_trace_points.c

…

drm_trace.h

…

drm_vblank_work.c

drm: Include <linux/export.h>

2025-06-16 09:01:23 +02:00

drm_vblank.c

treewide, timers: Rename from_timer() to timer_container_of()

2025-06-08 09:07:37 +02:00

drm_vma_manager.c

drm: Include <linux/export.h>

2025-06-16 09:01:23 +02:00

drm_writeback.c

Merge tag 'drm-next-2025-07-30' of https://gitlab.freedesktop.org/drm/kernel

2025-07-30 19:26:49 -07:00

Kconfig

Merge tag 'hyperv-next-signed-20251006' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux

2025-10-07 08:40:15 -07:00

Kconfig.debug

drm/format-helper: Move drm_fb_build_fourcc_list() to sysfb helpers

2025-06-18 10:46:03 +02:00

Makefile

rust: drm: Introduce the Tyr driver for Arm Mali GPUs

2025-09-11 12:20:03 +00:00