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233ce881dd
linux_dsm_epyc7002/drivers/gpu/drm
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Manasi Navare 233ce881dd drm/i915: Implement Link Rate fallback on Link training failure 
If link training at a link rate optimal for a particular
mode fails during modeset's atomic commit phase, then we
let the modeset complete and then retry. We save the link rate
value at which link training failed, update the link status property
to "BAD" and use a lower link rate to prune the modes. It will redo
the modeset on the current mode at lower link rate or if the current
mode gets pruned due to lower link constraints then, it will send a
hotplug uevent for userspace to handle it.

This is also required to pass DP CTS tests 4.3.1.3, 4.3.1.4,
4.3.1.6.

v9:
* Use the trimmed max values of link rate/lane count based on
link train fallback (Daniel Vetter)
v8:
* Set link_status to BAD first and then call mode_valid (Jani Nikula)
v7:
Remove the redundant variable in previous patch itself
v6:
* Obtain link rate index from fallback_link_rate using
the helper intel_dp_link_rate_index (Jani Nikula)
* Include fallback within intel_dp_start_link_train (Jani Nikula)
v5:
* Move set link status to drm core (Daniel Vetter, Jani Nikula)
v4:
* Add fallback support for non DDI platforms too
* Set connector->link status inside set_link_status function
(Jani Nikula)
v3:
* Set link status property to BAd unconditionally (Jani Nikula)
* Dont use two separate variables link_train_failed and link_status
to indicate same thing (Jani Nikula)
v2:
* Squashed a few patches (Jani Nikula)

Acked-by: Tony Cheng <tony.cheng@amd.com>
Acked-by: Harry Wentland <Harry.wentland@amd.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
Signed-off-by: Manasi Navare <manasi.d.navare@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/d796cc0c2814d668a47ef43c464f9a4089d46d64.1481883920.git.jani.nikula@intel.com
2017-03-01 16:44:35 +01:00
..
amd Merge airlied/drm-next into drm-misc-next 2017-02-26 21:34:42 +01:00
arc drm: remove drm_vblank_no_hw_counter assignment from driver code 2017-02-07 21:43:55 +01:00
arm drm: Constify drm_mode_config atomic helper private pointer 2017-02-12 12:05:23 +01:00
armada drm/armada: Remove armada_drm_debugfs_cleanup() 2017-03-01 16:09:51 +01:00
ast Merge airlied/drm-next into drm-misc-next 2017-02-26 21:34:42 +01:00
atmel-hlcdc drm/atmel-hlcdc: Simplify the HLCDC layer logic 2017-02-28 11:57:56 +01:00
bochs drm/fb-helper: Automatically clean up fb_info 2017-02-07 21:36:28 +01:00
bridge drm/bridge/sii8620: add missing error handling in probe 2017-02-23 11:06:11 -05:00
cirrus drm/fb-helper: Automatically clean up fb_info 2017-02-07 21:36:28 +01:00
etnaviv drm: Improve drm_mm search (and fix topdown allocation) with rbtrees 2017-02-03 11:10:32 +01:00
exynos Merge airlied/drm-next into drm-misc-next 2017-02-26 21:34:42 +01:00
fsl-dcu Merge airlied/drm-next into drm-misc-next 2017-02-26 21:34:42 +01:00
gma500 gpu: drm: drivers: Convert printk(KERN_<LEVEL> to pr_<level> 2017-03-01 09:44:11 +01:00
hisilicon drm: kirin: use vblank hooks in struct drm_crtc_funcs 2017-02-21 11:17:45 -05:00
i2c
i810 drm/i810: drop device_is_agp callback 2017-01-26 10:44:43 +01:00
i915 drm/i915: Implement Link Rate fallback on Link training failure 2017-03-01 16:44:35 +01:00
imx Merge airlied/drm-next into drm-misc-next 2017-02-26 21:34:42 +01:00
lib
mediatek drm: mediatek: use vblank hooks in struct drm_crtc_funcs 2017-02-21 11:17:54 -05:00
meson drm: meson: use vblank hooks in struct drm_crtc_funcs 2017-02-09 16:08:09 +08:00
mga drm/mga: remove device_is_agp callback 2017-01-26 10:45:03 +01:00
mgag200 gpu: drm: drivers: Convert printk(KERN_<LEVEL> to pr_<level> 2017-03-01 09:44:11 +01:00
msm drm/msm: Remove drm_debugfs_remove_files() calls 2017-03-01 16:09:52 +01:00
mxsfb drm: remove drm_vblank_no_hw_counter assignment from driver code 2017-02-07 21:43:55 +01:00
nouveau drm/nouveau: Remove nouveau_drm_debugfs_cleanup() 2017-03-01 16:09:52 +01:00
omapdrm gpu: drm: drivers: Convert printk(KERN_<LEVEL> to pr_<level> 2017-03-01 09:44:11 +01:00
panel drm/panel: simple: Specify bus width and flags for EDT displays 2017-01-26 10:57:18 +01:00
qxl drm/qxl: Remove qxl_debugfs_takedown() 2017-03-01 16:09:52 +01:00
r128 gpu: drm: drivers: Convert printk(KERN_<LEVEL> to pr_<level> 2017-03-01 09:44:11 +01:00
radeon Merge airlied/drm-next into drm-misc-next 2017-02-26 21:34:42 +01:00
rcar-du drm: rcar-du: use vblank hooks in struct drm_crtc_funcs 2017-02-09 16:08:44 +08:00
rockchip Merge airlied/drm-next into drm-misc-next 2017-02-26 21:34:42 +01:00
savage
selftests drm: kselftest: fix spelling mistake: "misalinged" -> "misaligned" 2017-02-26 22:54:47 +01:00
shmobile drm: shmobile: use vblank hooks in struct drm_crtc_funcs 2017-02-09 16:10:16 +08:00
sis drm: Improve drm_mm search (and fix topdown allocation) with rbtrees 2017-02-03 11:10:32 +01:00
sti drm: sti: make driver use devm_of_platform_populate() 2017-02-27 17:20:29 +01:00
sun4i drm: sun4i: use vblank hooks in struct drm_crtc_funcs 2017-02-09 16:10:52 +08:00
tdfx
tegra drm: tegra: use vblank hooks in struct drm_crtc_funcs 2017-02-09 16:11:31 +08:00
tilcdc drm: tilcdc: use vblank hooks in struct drm_crtc_funcs 2017-02-09 16:12:01 +08:00
tinydrm drm/tinydrm: fix semicolon.cocci warnings 2017-02-26 22:55:41 +01:00
ttm gpu: drm: drivers: Convert printk(KERN_<LEVEL> to pr_<level> 2017-03-01 09:44:11 +01:00
udl drm/fb-helper: Automatically clean up fb_info 2017-02-07 21:36:28 +01:00
vc4 drm/vc4: Add a paragraph at the top of vc4 docs introducing what it is. 2017-02-28 12:51:49 -08:00
vgem drm/vgem: Switch to reservation_object_lock() helpers 2017-01-24 11:00:23 +01:00
via drm/via: use get_user_pages_unlocked() 2017-02-28 10:00:50 +01:00
virtio drm/virtio: Remove virtio_gpu_debugfs_takedown() 2017-03-01 16:09:52 +01:00
vmwgfx gpu: drm: drivers: Convert printk(KERN_<LEVEL> to pr_<level> 2017-03-01 09:44:11 +01:00
zte drm: zte: use vblank hooks in struct drm_crtc_funcs 2017-02-09 16:13:20 +08:00
ati_pcigart.c
drm_agpsupport.c drm/i810: drop device_is_agp callback 2017-01-26 10:44:43 +01:00
drm_atomic_helper.c drm: Rename connector list iterator API 2017-02-28 16:16:48 +01:00
drm_atomic.c drm: Rename connector list iterator API 2017-02-28 16:16:48 +01:00
drm_auth.c drm/core: Use recommened kerneldoc for struct member refs 2017-01-25 16:22:42 +01:00
drm_blend.c drm/kms-core: Use recommened kerneldoc for struct member refs 2017-01-25 16:30:34 +01:00
drm_bridge.c
drm_bufs.c
drm_cache.c gpu: drm: core: Convert printk(KERN_<LEVEL> to pr_<level> 2017-02-28 14:32:19 +01:00
drm_color_mgmt.c drm/color: un-inline drm_color_lut_extract() 2017-01-31 15:31:58 +02:00
drm_connector.c drm: Rename connector list iterator API 2017-02-28 16:16:48 +01:00
drm_context.c
drm_crtc_helper_internal.h
drm_crtc_helper.c drm: Rename connector list iterator API 2017-02-28 16:16:48 +01:00
drm_crtc_internal.h drm: Rename drm_mode_object_get() 2017-02-28 16:14:53 +01:00
drm_crtc.c drm: Introduce drm_framebuffer_{get,put}() 2017-02-28 16:15:03 +01:00
drm_debugfs_crc.c
drm_debugfs.c drm: add drm_get_connector_force_name 2017-02-28 12:17:08 +02:00
drm_dma.c
drm_dp_aux_dev.c
drm_dp_dual_mode_helper.c drm: Add name for DRM_DP_DUAL_MODE_LSPCON 2017-02-23 11:06:12 -05:00
drm_dp_helper.c drm/kms-helpers: Use recommened kerneldoc for struct member refs 2017-01-25 16:18:57 +01:00
drm_dp_mst_topology.c drm/dp: Store drm_device in MST topology manager 2017-01-25 06:01:48 +01:00
drm_drv.c Linux 4.10-rc8 2017-02-23 12:10:12 +10:00
drm_dumb_buffers.c drm/kms-core: Use recommened kerneldoc for struct member refs 2017-01-25 16:30:34 +01:00
drm_edid_load.c drm: move edid property update and add modes out of edid firmware loader 2017-02-21 15:41:24 +02:00
drm_edid.c gpu: drm: core: Convert printk(KERN_<LEVEL> to pr_<level> 2017-02-28 14:32:19 +01:00
drm_encoder_slave.c drm/kms-core: Use recommened kerneldoc for struct member refs 2017-01-25 16:30:34 +01:00
drm_encoder.c drm: Rename connector list iterator API 2017-02-28 16:16:48 +01:00
drm_fb_cma_helper.c drm: Introduce drm_gem_object_{get,put}() 2017-02-28 16:16:43 +01:00
drm_fb_helper.c drm: Rename connector list iterator API 2017-02-28 16:16:48 +01:00
drm_flip_work.c
drm_fops.c drm/core: Use recommened kerneldoc for struct member refs 2017-01-25 16:22:42 +01:00
drm_fourcc.c
drm_framebuffer.c drm: Introduce drm_framebuffer_{get,put}() 2017-02-28 16:15:03 +01:00
drm_gem_cma_helper.c drm: Introduce drm_gem_object_{get,put}() 2017-02-28 16:16:43 +01:00
drm_gem.c drm: Introduce drm_gem_object_{get,put}() 2017-02-28 16:16:43 +01:00
drm_global.c
drm_hashtab.c
drm_info.c
drm_internal.h drm: remove device_is_agp callback 2017-01-26 10:45:14 +01:00
drm_ioc32.c gpu: drm: core: Convert printk(KERN_<LEVEL> to pr_<level> 2017-02-28 14:32:19 +01:00
drm_ioctl.c
drm_irq.c drm: unexport function drm_vblank_no_hw_counter() 2017-02-07 21:45:02 +01:00
drm_kms_helper_common.c
drm_legacy.h
drm_lock.c
drm_memory.c
drm_mipi_dsi.c
drm_mm.c drm: Micro-optimise drm_mm_for_each_node_in_range() 2017-02-06 16:57:37 +01:00
drm_mode_config.c drm: Rename connector list iterator API 2017-02-28 16:16:48 +01:00
drm_mode_object.c drm: Introduce drm_mode_object_{get,put}() 2017-02-28 16:14:55 +01:00
drm_modes.c drm: Rename drm_mode_object_get() 2017-02-28 16:14:53 +01:00
drm_modeset_helper.c
drm_modeset_lock.c drm/kms-core: Use recommened kerneldoc for struct member refs 2017-01-25 16:30:34 +01:00
drm_of.c
drm_panel.c
drm_pci.c drm: remove device_is_agp callback 2017-01-26 10:45:14 +01:00
drm_plane_helper.c drm: Rename connector list iterator API 2017-02-28 16:16:48 +01:00
drm_plane.c drm: Introduce drm_framebuffer_{get,put}() 2017-02-28 16:15:03 +01:00
drm_platform.c drm/core: Use recommened kerneldoc for struct member refs 2017-01-25 16:22:42 +01:00
drm_prime.c drm: Introduce drm_gem_object_{get,put}() 2017-02-28 16:16:43 +01:00
drm_print.c drm: drm_printer: add __printf validation 2017-02-26 21:43:08 +01:00
drm_probe_helper.c drm: Rename connector list iterator API 2017-02-28 16:16:48 +01:00
drm_property.c drm: Introduce drm_property_blob_{get,put}() 2017-02-28 16:16:46 +01:00
drm_rect.c
drm_scatter.c
drm_simple_kms_helper.c
drm_sysfs.c drm/core: Use recommened kerneldoc for struct member refs 2017-01-25 16:22:42 +01:00
drm_trace_points.c
drm_trace.h
drm_vm.c
drm_vma_manager.c drm: Improve drm_mm search (and fix topdown allocation) with rbtrees 2017-02-03 11:10:32 +01:00
Kconfig drm/fb-helper: Add multi buffer support for cma fbdev 2017-02-26 22:11:37 +01:00
Makefile drm: Add DRM support for tiny LCD displays 2017-02-18 18:04:58 +01:00