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5a64967a2f
linux/drivers/gpu/drm
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Wayne Lin 5a64967a2f drm/dp_mst: Have DP_Tx send one msg at a time 
[Why]
Noticed this while testing MST with the 4 ports MST hub from
StarTech.com. Sometimes can't light up monitors normally and get the
error message as 'sideband msg build failed'.

Look into aux transactions, found out that source sometimes will send
out another down request before receiving the down reply of the
previous down request. On the other hand, in drm_dp_get_one_sb_msg(),
current code doesn't handle the interleaved replies case. Hence, source
can't build up message completely and can't light up monitors.

[How]
For good compatibility, enforce source to send out one down request at a
time. Add a flag, is_waiting_for_dwn_reply, to determine if the source
can send out a down request immediately or not.

- Check the flag before calling process_single_down_tx_qlock to send out
a msg
- Set the flag when successfully send out a down request
- Clear the flag when successfully build up a down reply
- Clear the flag when find erros during sending out a down request
- Clear the flag when find errors during building up a down reply
- Clear the flag when timeout occurs during waiting for a down reply
- Use drm_dp_mst_kick_tx() to try to send another down request in queue
at the end of drm_dp_mst_wait_tx_reply() (attempt to send out messages
in queue when errors occur)

Cc: Lyude Paul <lyude@redhat.com>
Signed-off-by: Wayne Lin <Wayne.Lin@amd.com>
Signed-off-by: Lyude Paul <lyude@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200113093649.11755-1-Wayne.Lin@amd.com
2020-01-15 17:01:21 -05:00
..
amd drm/amdgpu: add DRIVER_SYNCOBJ_TIMELINE to amdgpu 2020-01-07 11:33:32 -05:00
arc Merge tag 'arcpgu-updates-2019.07.18' of github.com:abrodkin/linux into drm-next 2019-11-14 09:28:46 +10:00
arm drm/arm/mali: make malidp_mw_connector_helper_funcs static 2019-12-20 15:23:51 +00:00
armada drm/armada: drop use of drmP.h 2019-08-14 18:31:10 +02:00
aspeed drm/aspeed: gfc_crtc: Make structure aspeed_gfx_funcs constant 2019-08-14 19:27:26 +02:00
ast drm/vram: drop DRM_VRAM_MM_FILE_OPERATIONS 2019-10-17 13:59:16 +02:00
atmel-hlcdc drm/atmel-hlcdc: Use swap() where appropriate 2019-10-11 18:22:50 +03:00
bochs drm/bochs: Replace prepare_fb()/cleanup_fb() with GEM VRAM helpers 2019-10-24 16:12:30 +02:00
bridge This is the bulk of GPIO changes for the v5.5 kernel cycle 2019-12-01 17:56:50 -08:00
cirrus drm/simple-kms: Standardize arguments for callbacks 2019-10-24 13:55:56 +02:00
etnaviv Linux 5.4-rc7 2019-11-14 05:53:10 +10:00
exynos drm/exynos: gsc: add missed component_del 2019-12-19 08:52:42 +09:00
fsl-dcu drm: Stop including drm_bridge.h from drm_crtc.h 2019-08-28 22:11:03 +02:00
gma500 drm: Spelling s/connet/connect/ 2019-10-24 17:59:45 +02:00
hisilicon drm/hisilicon/hibmc: Use GEM VRAM's prepare_fb() and cleanup_fb() helpers 2019-10-24 16:12:36 +02:00
i2c drm: tda998x: use cec_notifier_conn_(un)register 2019-10-21 14:23:25 +02:00
i810 drm/i810: Prevent underflow in ioctl 2019-10-04 17:04:05 +01:00
i915 drm/i915/dp: Disable Port sync mode correctly on teardown 2020-01-07 15:11:40 +02:00
imx Merge drm/drm-next into drm-misc-next 2019-10-03 16:38:50 +02:00
ingenic drm main pull for 5.4-rc1 2019-09-19 16:24:24 -07:00
lib
lima drm/lima: add __GFP_NOWARN flag to all dma_alloc_wc 2019-10-17 23:42:02 +08:00
mcde - A fix for a memory leak in the dma-buf support 2019-12-09 17:13:19 +10:00
mediatek drm/mediatek: reduce the hbp and hfp for phy timing 2019-12-17 10:23:43 +08:00
meson - Expand dma-buf MAINTAINER scope 2019-12-12 13:12:17 +10:00
mga drm/mga: drop use of drmP.h 2019-06-30 09:48:05 +02:00
mgag200 drm/mgag200: Flag all G200 SE A machines as broken wrt <startadd> 2019-12-06 16:05:09 +01:00
msm Merge tag 'drm-msm-next-2019-11-05' of https://gitlab.freedesktop.org/drm/msm into drm-next 2019-12-02 10:21:12 +10:00
mxsfb drm/mxsfb: Read bus flags from bridge if present 2019-10-14 22:19:32 +02:00
nouveau drm/nouveau/kms/nv50-: fix panel scaling 2019-12-10 21:34:52 +10:00
omapdrm drm/omap: fix dma_addr refcounting 2019-12-04 19:11:28 +02:00
panel Linux 5.4-rc4 2019-10-23 12:10:05 +02:00
panfrost -mgag200: more startadd mitigation (Thomas) 2019-12-13 14:33:00 +10:00
pl111 drm/simple-kms: Standardize arguments for callbacks 2019-10-24 13:55:56 +02:00
qxl drm/qxl: stop using TTM to call driver internal functions 2019-10-25 11:40:51 +02:00
r128 drm/r128: drop use of drmP.h 2019-07-17 12:52:55 +02:00
radeon drm msm + fixes for 5.5-rc1 2019-12-06 10:28:09 -08:00
rcar-du drm: rcar-du: lvds: Add r8a774b1 support 2019-10-16 00:28:32 +03:00
rockchip drm/rockchip: fix integer type used for storing dp data rate 2020-01-13 14:31:59 +01:00
savage
scheduler drm/sched: Avoid job cleanup if sched thread is parked. 2019-11-07 18:08:07 -05:00
selftests drm/mm: Use helpers for drm_mm_node booleans 2019-10-04 13:42:33 +01:00
shmobile drm/shmobile: drop use of drmP.h 2019-07-15 18:11:31 +02:00
sis
sti drm: sti: fix W=1 warnings 2019-09-16 15:14:43 +02:00
stm drm/stm: dsi: higher pll out only in video burst mode 2019-09-16 15:14:10 +02:00
sun4i drm/sun4i: tcon: Set RGB DCLK min. divider based on hardware model 2020-01-07 15:56:40 +01:00
tdfx drm/tdfx: drop use of drmP.h 2019-07-17 12:52:55 +02:00
tegra drm/tegra: Run hub cleanup on ->remove() 2019-12-04 13:38:16 +01:00
tilcdc drm-misc-next for 5.5: 2019-10-11 09:30:53 +10:00
tiny drm/shmem: drop DEFINE_DRM_GEM_SHMEM_FOPS 2019-10-17 13:59:16 +02:00
ttm Merge branch 'vmwgfx-coherent' of git://people.freedesktop.org/~thomash/linux into drm-next 2019-11-28 14:33:01 +10:00
tve200 drm/bridge: panel: Infer connector type from panel by default 2019-09-08 19:04:23 +02:00
udl drm/connector: Share with non-atomic drivers the function to get the single encoder 2019-09-16 15:13:02 -07:00
v3d Linux 5.4-rc7 2019-11-14 05:53:10 +10:00
vboxvideo drm/vboxvideo: Use drm_gem_fb_create_with_dirty instead of drm_gem_fb_create 2019-10-29 13:10:07 +01:00
vc4 Merge drm/drm-next into drm-misc-next 2019-10-23 11:14:11 -04:00
vgem dma-buf: rename reservation_object to dma_resv 2019-08-13 09:09:30 +02:00
via drivers/gpu/drm/via: convert put_page() to put_user_page*() 2019-09-24 15:54:08 -07:00
virtio drm/virtio: add missing virtio_gpu_array_lock_resv call 2020-01-13 08:28:12 +01:00
vkms drm/vkms: Remove duplicated include from vkms_drv.c 2019-10-10 15:45:35 +02:00
vmwgfx Merge branch 'vmwgfx-coherent' of git://people.freedesktop.org/~thomash/linux into drm-next 2019-11-28 14:33:01 +10:00
xen drm/simple-kms: Standardize arguments for callbacks 2019-10-24 13:55:56 +02:00
zte Linus 5.3-rc1 2019-07-22 21:24:10 +02:00
ati_pcigart.c drm/ati_pcigart: drop dependency on drm_os_linux.h 2019-07-19 23:24:16 +02:00
drm_agpsupport.c gpu/drm: fix a few kernel-doc "/**" mark warnings 2019-07-16 11:25:02 +02:00
drm_atomic_helper.c Linux 5.4-rc7 2019-11-14 05:53:10 +10:00
drm_atomic_state_helper.c drm/atomic: Rename crtc_state->pageflip_flags to async_flip 2019-09-18 18:43:36 +02:00
drm_atomic_uapi.c Merge drm/drm-next into drm-misc-next 2019-10-03 16:38:50 +02:00
drm_atomic.c drm: Free the writeback_job when it with an empty fb 2019-09-23 15:31:53 +08:00
drm_auth.c
drm_blend.c drm: two planes with the same zpos have undefined ordering 2019-10-09 20:04:55 +02:00
drm_bridge.c
drm_bufs.c drm main pull request for v5.3-rc1 (sans mm changes) 2019-07-15 19:04:27 -07:00
drm_cache.c drm/gpu: Fix Memory barrier without comment Issue 2019-10-25 09:35:06 +02:00
drm_client_modeset.c Merge drm/drm-next into drm-misc-next 2019-10-03 16:38:50 +02:00
drm_client.c drm/fb-helper: Map DRM client buffer only when required 2019-08-01 15:01:29 +02:00
drm_color_mgmt.c
drm_connector.c drm main pull for 5.5-rc1 2019-11-27 17:45:48 -08:00
drm_context.c
drm_crtc_helper_internal.h drm/connector: Share with non-atomic drivers the function to get the single encoder 2019-09-16 15:13:02 -07:00
drm_crtc_helper.c Merge drm/drm-next into drm-misc-next 2019-10-03 16:38:50 +02:00
drm_crtc_internal.h
drm_crtc.c
drm_damage_helper.c drm: damage_helper: Fix race checking plane->state->fb 2019-10-08 09:41:06 -04:00
drm_debugfs_crc.c drm: Fix return type of crc .poll() 2019-09-30 20:17:31 +03:00
drm_debugfs.c
drm_dma.c gpu/drm: fix a few kernel-doc "/**" mark warnings 2019-07-16 11:25:02 +02:00
drm_dp_aux_dev.c drm/dp_mst: Enable registration of AUX devices for MST ports 2019-07-25 16:39:35 -04:00
drm_dp_cec.c drm_dp_cec: drop use of drmP.h 2019-10-08 18:29:00 +02:00
drm_dp_dual_mode_helper.c
drm_dp_helper.c drm/tegra: Move drm_dp_link helpers to Tegra DRM 2019-10-23 18:22:10 +02:00
drm_dp_mst_topology_internal.h drm/dp_mst: Add sideband down request tracing + selftests 2019-09-03 19:30:06 -04:00
drm_dp_mst_topology.c drm/dp_mst: Have DP_Tx send one msg at a time 2020-01-15 17:01:21 -05:00
drm_drv.c Merge drm/drm-next into drm-misc-next 2019-10-03 16:38:50 +02:00
drm_dsc.c drm/dsc: Fix bogus cpu_to_be16() usage 2019-09-30 20:15:53 +03:00
drm_dumb_buffers.c Revert "drm/gem: Rename drm_gem_dumb_map_offset() to drm_gem_map_offset()" 2019-08-07 11:56:48 -04:00
drm_edid_load.c drm/print: add drm_debug_enabled() 2019-10-02 16:28:55 +03:00
drm_edid.c Merge drm/drm-next into drm-misc-next 2019-10-23 11:14:11 -04:00
drm_encoder_slave.c
drm_encoder.c drm: Stop including drm_bridge.h from drm_crtc.h 2019-08-28 22:11:03 +02:00
drm_fb_cma_helper.c
drm_fb_helper.c drm/fb-helper: Round up bits_per_pixel if possible 2020-01-07 16:54:03 +01:00
drm_file.c
drm_flip_work.c
drm_format_helper.c
drm_fourcc.c
drm_framebuffer.c drm: silence variable 'conn' set but not used 2019-07-22 16:04:53 -04:00
drm_gem_cma_helper.c
drm_gem_framebuffer_helper.c dma-buf: rename reservation_object to dma_resv 2019-08-13 09:09:30 +02:00
drm_gem_shmem_helper.c drm/gem: Fix mmap fake offset handling for drm_gem_object_funcs.mmap 2019-10-29 13:29:21 -05:00
drm_gem_ttm_helper.c drm/ttm: fix mmap refcounting 2019-11-15 08:00:08 +01:00
drm_gem_vram_helper.c drm/ttm: remove pointers to globals 2019-10-25 11:40:51 +02:00
drm_gem.c drm/ttm: fix mmap refcounting 2019-11-15 08:00:08 +01:00
drm_hashtab.c
drm_hdcp.c drm/hdcp: reference for srm file format 2019-08-06 13:18:42 +05:30
drm_internal.h
drm_ioc32.c Linus 5.3-rc1 2019-07-22 21:24:10 +02:00
drm_ioctl.c drm/atomic: Take the atomic toys away from X 2019-09-18 18:42:21 +02:00
drm_irq.c
drm_kms_helper_common.c drm: fix module name in edid_firmware log message 2019-08-22 10:41:06 +03:00
drm_lease.c
drm_legacy_misc.c gpu/drm: fix a few kernel-doc "/**" mark warnings 2019-07-16 11:25:02 +02:00
drm_legacy.h
drm_lock.c gpu/drm: fix a few kernel-doc "/**" mark warnings 2019-07-16 11:25:02 +02:00
drm_memory.c drm: Include prototype for drm_need_swiotlb() 2019-09-30 20:16:28 +03:00
drm_mipi_dbi.c drm/mipi_dbi: Use simple right shift instead of double negation 2019-10-22 15:09:15 +02:00
drm_mipi_dsi.c drivers: Introduce device lookup variants by of_node 2019-07-30 13:07:41 +02:00
drm_mm.c drm/mm: Use clear_bit_unlock() for releasing the drm_mm_node() 2019-10-04 13:43:43 +01:00
drm_mode_config.c drm/doc: Drop misleading comment on drm_mode_config_cleanup 2019-10-23 11:00:41 +02:00
drm_mode_object.c drm/kms: Duct-tape for mode object lifetime checks 2019-09-18 11:27:18 +02:00
drm_modes.c drm main pull for 5.4-rc1 2019-09-19 16:24:24 -07:00
drm_modeset_helper.c
drm_modeset_lock.c docs conversion for v5.3-rc1 2019-07-16 12:21:41 -07:00
drm_of.c drm: Remove redundant of_device_is_available check 2019-09-20 15:03:42 -04:00
drm_panel_orientation_quirks.c drm: panel-orientation-quirks: Add extra quirk table entry for GPD MicroPC 2019-07-01 16:58:09 +02:00
drm_panel.c drm/panel: Add and fill drm_panel type field 2019-09-08 19:04:01 +02:00
drm_pci.c
drm_plane_helper.c
drm_plane.c
drm_prime.c drm: add mmap() to drm_gem_object_funcs 2019-10-17 13:59:16 +02:00
drm_print.c drm/print: add drm_debug_enabled() 2019-10-02 16:28:55 +03:00
drm_probe_helper.c drm/connector: Allow max possible encoders to attach to a connector 2019-09-16 15:13:53 -07:00
drm_property.c drm: limit to INT_MAX in create_blob ioctl 2019-12-04 19:44:13 -08:00
drm_rect.c
drm_scatter.c gpu/drm: fix a few kernel-doc "/**" mark warnings 2019-07-16 11:25:02 +02:00
drm_scdc_helper.c
drm_self_refresh_helper.c drm/atomic: fix self-refresh helpers crtc state dereference 2019-11-06 13:00:21 -05:00
drm_simple_kms_helper.c drm/simple-kms: Standardize arguments for callbacks 2019-10-24 13:55:56 +02:00
drm_syncobj.c drm/syncobj: extend syncobj query ability v3 2019-10-18 12:24:56 +02:00
drm_sysfs.c drm: uevent for connector status change 2019-08-06 13:16:54 +05:30
drm_trace_points.c
drm_trace.h drm: Add high-precision time to vblank trace event 2019-09-03 09:46:18 +02:00
drm_vblank.c drm/drm_vblank: Change EINVAL by the correct errno 2019-10-08 18:43:26 -04:00
drm_vm.c gpu/drm: fix a few kernel-doc "/**" mark warnings 2019-07-16 11:25:02 +02:00
drm_vma_manager.c
drm_vram_helper_common.c drm/vram: Have VRAM MM call GEM VRAM functions directly 2019-09-12 19:54:42 +02:00
drm_writeback.c drm: Clear the fence pointer when writeback job signaled 2019-09-23 15:32:53 +08:00
Kconfig mgag200- Fix hw with broken 'startadd' support (Thomas) 2019-12-05 11:11:11 +10:00
Makefile Merge drm/drm-next into drm-misc-next 2019-10-03 16:38:50 +02:00