<feed xmlns='http://www.w3.org/2005/Atom'>
<title>linux.git/drivers/gpu/drm/bridge, branch v6.6</title>
<subtitle>Linux kernel source tree</subtitle>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/'/>
<entry>
<title>drm/bridge: ti-sn65dsi86: Associate DSI device lifetime with auxiliary device</title>
<updated>2023-10-12T16:24:09+00:00</updated>
<author>
<name>Stephen Boyd</name>
<email>swboyd@chromium.org</email>
</author>
<published>2023-10-02T23:54:06+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=7b821db95140e2c118567aee22a78bf85f3617e0'/>
<id>7b821db95140e2c118567aee22a78bf85f3617e0</id>
<content type='text'>
The kernel produces a warning splat and the DSI device fails to register
in this driver if the i2c driver probes, populates child auxiliary
devices, and then somewhere in ti_sn_bridge_probe() a function call
returns -EPROBE_DEFER. When the auxiliary driver probe defers, the dsi
device created by devm_mipi_dsi_device_register_full() is left
registered because the devm managed device used to manage the lifetime
of the DSI device is the parent i2c device, not the auxiliary device
that is being probed.

Associate the DSI device created and managed by this driver to the
lifetime of the auxiliary device, not the i2c device, so that the DSI
device is removed when the auxiliary driver unbinds. Similarly change
the device pointer used for dev_err_probe() so the deferred probe errors
are associated with the auxiliary device instead of the parent i2c
device so we can narrow down future problems faster.

Cc: Douglas Anderson &lt;dianders@chromium.org&gt;
Cc: Maxime Ripard &lt;maxime@cerno.tech&gt;
Fixes: c3b75d4734cb ("drm/bridge: sn65dsi86: Register and attach our DSI device at probe")
Signed-off-by: Stephen Boyd &lt;swboyd@chromium.org&gt;
Reviewed-by: Neil Armstrong &lt;neil.armstrong@linaro.org&gt;
Reviewed-by: Douglas Anderson &lt;dianders@chromium.org&gt;
Signed-off-by: Douglas Anderson &lt;dianders@chromium.org&gt;
Link: https://patchwork.freedesktop.org/patch/msgid/20231002235407.769399-1-swboyd@chromium.org
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
The kernel produces a warning splat and the DSI device fails to register
in this driver if the i2c driver probes, populates child auxiliary
devices, and then somewhere in ti_sn_bridge_probe() a function call
returns -EPROBE_DEFER. When the auxiliary driver probe defers, the dsi
device created by devm_mipi_dsi_device_register_full() is left
registered because the devm managed device used to manage the lifetime
of the DSI device is the parent i2c device, not the auxiliary device
that is being probed.

Associate the DSI device created and managed by this driver to the
lifetime of the auxiliary device, not the i2c device, so that the DSI
device is removed when the auxiliary driver unbinds. Similarly change
the device pointer used for dev_err_probe() so the deferred probe errors
are associated with the auxiliary device instead of the parent i2c
device so we can narrow down future problems faster.

Cc: Douglas Anderson &lt;dianders@chromium.org&gt;
Cc: Maxime Ripard &lt;maxime@cerno.tech&gt;
Fixes: c3b75d4734cb ("drm/bridge: sn65dsi86: Register and attach our DSI device at probe")
Signed-off-by: Stephen Boyd &lt;swboyd@chromium.org&gt;
Reviewed-by: Neil Armstrong &lt;neil.armstrong@linaro.org&gt;
Reviewed-by: Douglas Anderson &lt;dianders@chromium.org&gt;
Signed-off-by: Douglas Anderson &lt;dianders@chromium.org&gt;
Link: https://patchwork.freedesktop.org/patch/msgid/20231002235407.769399-1-swboyd@chromium.org
</pre>
</div>
</content>
</entry>
<entry>
<title>Merge tag 'drm-next-2023-08-30' of git://anongit.freedesktop.org/drm/drm</title>
<updated>2023-08-30T20:34:34+00:00</updated>
<author>
<name>Linus Torvalds</name>
<email>torvalds@linux-foundation.org</email>
</author>
<published>2023-08-30T20:34:34+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=461f35f014466c4e26dca6be0f431f57297df3f2'/>
<id>461f35f014466c4e26dca6be0f431f57297df3f2</id>
<content type='text'>
Pull drm updates from Dave Airlie:
 "The drm core grew a new generic gpu virtual address manager, and new
  execution locking helpers. These are used by nouveau now to provide
  uAPI support for the userspace Vulkan driver. AMD had a bunch of new
  IP core support, loads of refactoring around fbdev, but mostly just
  the usual amount of stuff across the board.

  core:
   - fix gfp flags in drmm_kmalloc

  gpuva:
   - add new generic GPU VA manager (for nouveau initially)

  syncobj:
   - add new DRM_IOCTL_SYNCOBJ_EVENTFD ioctl

  dma-buf:
   - acquire resv lock for mmap() in exporters
   - support dma-buf self import automatically
   - docs fixes

  backlight:
   - fix fbdev interactions

  atomic:
   - improve logging

  prime:
   - remove struct gem_prim_mmap plus driver updates

  gem:
   - drm_exec: add locking over multiple GEM objects
   - fix lockdep checking

  fbdev:
   - make fbdev userspace interfaces optional
   - use linux device instead of fbdev device
   - use deferred i/o helper macros in various drivers
   - Make FB core selectable without drivers
   - Remove obsolete flags FBINFO_DEFAULT and FBINFO_FLAG_DEFAULT
   - Add helper macros and Kconfig tokens for DMA-allocated framebuffer

  ttm:
   - support init_on_free
   - swapout fixes

  panel:
   - panel-edp: Support AUO B116XAB01.4
   - Support Visionox R66451 plus DT bindings
   - ld9040:
      - Backlight support
      - magic improved
      - Kconfig fix
   - Convert to of_device_get_match_data()
   - Fix Kconfig dependencies
   - simple:
      - Set bpc value to fix warning
      - Set connector type for AUO T215HVN01
      - Support Innolux G156HCE-L01 plus DT bindings
   - ili9881: Support TDO TL050HDV35 LCD panel plus DT bindings
   - startek: Support KD070FHFID015 MIPI-DSI panel plus DT bindings
   - sitronix-st7789v:
      - Support Inanbo T28CP45TN89 plus DT bindings
      - Support EDT ET028013DMA plus DT bindings
      - Various cleanups
   - edp: Add timings for N140HCA-EAC
   - Allow panels and touchscreens to power sequence together
   - Fix Innolux G156HCE-L01 LVDS clock

  bridge:
   - debugfs for chains support
   - dw-hdmi:
      - Improve support for YUV420 bus format
      - CEC suspend/resume
      - update EDID on HDMI detect
   - dw-mipi-dsi: Fix enable/disable of DSI controller
   - lt9611uxc: Use MODULE_FIRMWARE()
   - ps8640: Remove broken EDID code
   - samsung-dsim: Fix command transfer
   - tc358764:
      - Handle HS/VS polarity
      - Use BIT() macro
      - Various cleanups
   - adv7511: Fix low refresh rate
   - anx7625:
      - Switch to macros instead of hardcoded values
      - locking fixes
   - tc358767: fix hardware delays
   - sitronix-st7789v:
      - Support panel orientation
      - Support rotation property
      - Add support for Jasonic JT240MHQS-HWT-EK-E3 plus DT bindings

  amdgpu:
   - SDMA 6.1.0 support
   - HDP 6.1 support
   - SMUIO 14.0 support
   - PSP 14.0 support
   - IH 6.1 support
   - Lots of checkpatch cleanups
   - GFX 9.4.3 updates
   - Add USB PD and IFWI flashing documentation
   - GPUVM updates
   - RAS fixes
   - DRR fixes
   - FAMS fixes
   - Virtual display fixes
   - Soft IH fixes
   - SMU13 fixes
   - Rework PSP firmware loading for other IPs
   - Kernel doc fixes
   - DCN 3.0.1 fixes
   - LTTPR fixes
   - DP MST fixes
   - DCN 3.1.6 fixes
   - SMU 13.x fixes
   - PSP 13.x fixes
   - SubVP fixes
   - GC 9.4.3 fixes
   - Display bandwidth calculation fixes
   - VCN4 secure submission fixes
   - Allow building DC on RISC-V
   - Add visible FB info to bo_print_info
   - HBR3 fixes
   - GFX9 MCBP fix
   - GMC10 vmhub index fix
   - GMC11 vmhub index fix
   - Create a new doorbell manager
   - SR-IOV fixes
   - initial freesync panel replay support
   - revert zpos properly until igt regression is fixeed
   - use TTM to manage doorbell BAR
   - Expose both current and average power via hwmon if supported

  amdkfd:
   - Cleanup CRIU dma-buf handling
   - Use KIQ to unmap HIQ
   - GFX 9.4.3 debugger updates
   - GFX 9.4.2 debugger fixes
   - Enable cooperative groups fof gfx11
   - SVM fixes
   - Convert older APUs to use dGPU path like newer APUs
   - Drop IOMMUv2 path as it is no longer used
   - TBA fix for aldebaran

  i915:
   - ICL+ DSI modeset sequence
   - HDCP improvements
   - MTL display fixes and cleanups
   - HSW/BDW PSR1 restored
   - Init DDI ports in VBT order
   - General display refactors
   - Start using plane scale factor for relative data rate
   - Use shmem for dpt objects
   - Expose RPS thresholds in sysfs
   - Apply GuC SLPC min frequency softlimit correctly
   - Extend Wa_14015795083 to TGL, RKL, DG1 and ADL
   - Fix a VMA UAF for multi-gt platform
   - Do not use stolen on MTL due to HW bug
   - Check HuC and GuC version compatibility on MTL
   - avoid infinite GPU waits due to premature release of request memory
   - Fixes and updates for GSC memory allocation
   - Display SDVO fixes
   - Take stolen handling out of FBC code
   - Make i915_coherent_map_type GT-centric
   - Simplify shmem_create_from_object map_type

  msm:
   - SM6125 MDSS support
   - DPU: SM6125 DPU support
   - DSI: runtime PM support, burst mode support
   - DSI PHY: SM6125 support in 14nm DSI PHY driver
   - GPU: prepare for a7xx
   - fix a690 firmware
   - disable relocs on a6xx and newer

  radeon:
   - Lots of checkpatch cleanups

  ast:
   - improve device-model detection
   - Represent BMV as virtual connector
   - Report DP connection status

  nouveau:
   - add new exec/bind interface to support Vulkan
   - document some getparam ioctls
   - improve VRAM detection
   - various fixes/cleanups
   - workraound DPCD issues

  ivpu:
   - MMU updates
   - debugfs support
   - Support vpu4

  virtio:
   - add sync object support

  atmel-hlcdc:
   - Support inverted pixclock polarity

  etnaviv:
   - runtime PM cleanups
   - hang handling fixes

  exynos:
   - use fbdev DMA helpers
   - fix possible NULL ptr dereference

  komeda:
   - always attach encoder

  omapdrm:
   - use fbdev DMA helpers
ingenic:
   - kconfig regmap fixes

  loongson:
   - support display controller

  mediatek:
   - Small mtk-dpi cleanups
   - DisplayPort: support eDP and aux-bus
   - Fix coverity issues
   - Fix potential memory leak if vmap() fail

  mgag200:
   - minor fixes

  mxsfb:
   - support disabling overlay planes

  panfrost:
   - fix sync in IRQ handling

  ssd130x:
   - Support per-controller default resolution plus DT bindings
   - Reduce memory-allocation overhead
   - Improve intermediate buffer size computation
   - Fix allocation of temporary buffers
   - Fix pitch computation
   - Fix shadow plane allocation

  tegra:
   - use fbdev DMA helpers
   - Convert to devm_platform_ioremap_resource()
   - support bridge/connector
   - enable PM

  tidss:
   - Support TI AM625 plus DT bindings
   - Implement new connector model plus driver updates

  vkms:
   - improve write back support
   - docs fixes
   - support gamma LUT

  zynqmp-dpsub:
   - misc fixes"

* tag 'drm-next-2023-08-30' of git://anongit.freedesktop.org/drm/drm: (1327 commits)
  drm/gpuva_mgr: remove unused prev pointer in __drm_gpuva_sm_map()
  drm/tests/drm_kunit_helpers: Place correct function name in the comment header
  drm/nouveau: uapi: don't pass NO_PREFETCH flag implicitly
  drm/nouveau: uvmm: fix unset region pointer on remap
  drm/nouveau: sched: avoid job races between entities
  drm/i915: Fix HPD polling, reenabling the output poll work as needed
  drm: Add an HPD poll helper to reschedule the poll work
  drm/i915: Fix TLB-Invalidation seqno store
  drm/ttm/tests: Fix type conversion in ttm_pool_test
  drm/msm/a6xx: Bail out early if setting GPU OOB fails
  drm/msm/a6xx: Move LLC accessors to the common header
  drm/msm/a6xx: Introduce a6xx_llc_read
  drm/ttm/tests: Require MMU when testing
  drm/panel: simple: Fix Innolux G156HCE-L01 LVDS clock
  Revert "Revert "drm/amdgpu/display: change pipe policy for DCN 2.0""
  drm/amdgpu: Add memory vendor information
  drm/amd: flush any delayed gfxoff on suspend entry
  drm/amdgpu: skip fence GFX interrupts disable/enable for S0ix
  drm/amdgpu: Remove gfxoff check in GFX v9.4.3
  drm/amd/pm: Update pci link speed for smu v13.0.6
  ...
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Pull drm updates from Dave Airlie:
 "The drm core grew a new generic gpu virtual address manager, and new
  execution locking helpers. These are used by nouveau now to provide
  uAPI support for the userspace Vulkan driver. AMD had a bunch of new
  IP core support, loads of refactoring around fbdev, but mostly just
  the usual amount of stuff across the board.

  core:
   - fix gfp flags in drmm_kmalloc

  gpuva:
   - add new generic GPU VA manager (for nouveau initially)

  syncobj:
   - add new DRM_IOCTL_SYNCOBJ_EVENTFD ioctl

  dma-buf:
   - acquire resv lock for mmap() in exporters
   - support dma-buf self import automatically
   - docs fixes

  backlight:
   - fix fbdev interactions

  atomic:
   - improve logging

  prime:
   - remove struct gem_prim_mmap plus driver updates

  gem:
   - drm_exec: add locking over multiple GEM objects
   - fix lockdep checking

  fbdev:
   - make fbdev userspace interfaces optional
   - use linux device instead of fbdev device
   - use deferred i/o helper macros in various drivers
   - Make FB core selectable without drivers
   - Remove obsolete flags FBINFO_DEFAULT and FBINFO_FLAG_DEFAULT
   - Add helper macros and Kconfig tokens for DMA-allocated framebuffer

  ttm:
   - support init_on_free
   - swapout fixes

  panel:
   - panel-edp: Support AUO B116XAB01.4
   - Support Visionox R66451 plus DT bindings
   - ld9040:
      - Backlight support
      - magic improved
      - Kconfig fix
   - Convert to of_device_get_match_data()
   - Fix Kconfig dependencies
   - simple:
      - Set bpc value to fix warning
      - Set connector type for AUO T215HVN01
      - Support Innolux G156HCE-L01 plus DT bindings
   - ili9881: Support TDO TL050HDV35 LCD panel plus DT bindings
   - startek: Support KD070FHFID015 MIPI-DSI panel plus DT bindings
   - sitronix-st7789v:
      - Support Inanbo T28CP45TN89 plus DT bindings
      - Support EDT ET028013DMA plus DT bindings
      - Various cleanups
   - edp: Add timings for N140HCA-EAC
   - Allow panels and touchscreens to power sequence together
   - Fix Innolux G156HCE-L01 LVDS clock

  bridge:
   - debugfs for chains support
   - dw-hdmi:
      - Improve support for YUV420 bus format
      - CEC suspend/resume
      - update EDID on HDMI detect
   - dw-mipi-dsi: Fix enable/disable of DSI controller
   - lt9611uxc: Use MODULE_FIRMWARE()
   - ps8640: Remove broken EDID code
   - samsung-dsim: Fix command transfer
   - tc358764:
      - Handle HS/VS polarity
      - Use BIT() macro
      - Various cleanups
   - adv7511: Fix low refresh rate
   - anx7625:
      - Switch to macros instead of hardcoded values
      - locking fixes
   - tc358767: fix hardware delays
   - sitronix-st7789v:
      - Support panel orientation
      - Support rotation property
      - Add support for Jasonic JT240MHQS-HWT-EK-E3 plus DT bindings

  amdgpu:
   - SDMA 6.1.0 support
   - HDP 6.1 support
   - SMUIO 14.0 support
   - PSP 14.0 support
   - IH 6.1 support
   - Lots of checkpatch cleanups
   - GFX 9.4.3 updates
   - Add USB PD and IFWI flashing documentation
   - GPUVM updates
   - RAS fixes
   - DRR fixes
   - FAMS fixes
   - Virtual display fixes
   - Soft IH fixes
   - SMU13 fixes
   - Rework PSP firmware loading for other IPs
   - Kernel doc fixes
   - DCN 3.0.1 fixes
   - LTTPR fixes
   - DP MST fixes
   - DCN 3.1.6 fixes
   - SMU 13.x fixes
   - PSP 13.x fixes
   - SubVP fixes
   - GC 9.4.3 fixes
   - Display bandwidth calculation fixes
   - VCN4 secure submission fixes
   - Allow building DC on RISC-V
   - Add visible FB info to bo_print_info
   - HBR3 fixes
   - GFX9 MCBP fix
   - GMC10 vmhub index fix
   - GMC11 vmhub index fix
   - Create a new doorbell manager
   - SR-IOV fixes
   - initial freesync panel replay support
   - revert zpos properly until igt regression is fixeed
   - use TTM to manage doorbell BAR
   - Expose both current and average power via hwmon if supported

  amdkfd:
   - Cleanup CRIU dma-buf handling
   - Use KIQ to unmap HIQ
   - GFX 9.4.3 debugger updates
   - GFX 9.4.2 debugger fixes
   - Enable cooperative groups fof gfx11
   - SVM fixes
   - Convert older APUs to use dGPU path like newer APUs
   - Drop IOMMUv2 path as it is no longer used
   - TBA fix for aldebaran

  i915:
   - ICL+ DSI modeset sequence
   - HDCP improvements
   - MTL display fixes and cleanups
   - HSW/BDW PSR1 restored
   - Init DDI ports in VBT order
   - General display refactors
   - Start using plane scale factor for relative data rate
   - Use shmem for dpt objects
   - Expose RPS thresholds in sysfs
   - Apply GuC SLPC min frequency softlimit correctly
   - Extend Wa_14015795083 to TGL, RKL, DG1 and ADL
   - Fix a VMA UAF for multi-gt platform
   - Do not use stolen on MTL due to HW bug
   - Check HuC and GuC version compatibility on MTL
   - avoid infinite GPU waits due to premature release of request memory
   - Fixes and updates for GSC memory allocation
   - Display SDVO fixes
   - Take stolen handling out of FBC code
   - Make i915_coherent_map_type GT-centric
   - Simplify shmem_create_from_object map_type

  msm:
   - SM6125 MDSS support
   - DPU: SM6125 DPU support
   - DSI: runtime PM support, burst mode support
   - DSI PHY: SM6125 support in 14nm DSI PHY driver
   - GPU: prepare for a7xx
   - fix a690 firmware
   - disable relocs on a6xx and newer

  radeon:
   - Lots of checkpatch cleanups

  ast:
   - improve device-model detection
   - Represent BMV as virtual connector
   - Report DP connection status

  nouveau:
   - add new exec/bind interface to support Vulkan
   - document some getparam ioctls
   - improve VRAM detection
   - various fixes/cleanups
   - workraound DPCD issues

  ivpu:
   - MMU updates
   - debugfs support
   - Support vpu4

  virtio:
   - add sync object support

  atmel-hlcdc:
   - Support inverted pixclock polarity

  etnaviv:
   - runtime PM cleanups
   - hang handling fixes

  exynos:
   - use fbdev DMA helpers
   - fix possible NULL ptr dereference

  komeda:
   - always attach encoder

  omapdrm:
   - use fbdev DMA helpers
ingenic:
   - kconfig regmap fixes

  loongson:
   - support display controller

  mediatek:
   - Small mtk-dpi cleanups
   - DisplayPort: support eDP and aux-bus
   - Fix coverity issues
   - Fix potential memory leak if vmap() fail

  mgag200:
   - minor fixes

  mxsfb:
   - support disabling overlay planes

  panfrost:
   - fix sync in IRQ handling

  ssd130x:
   - Support per-controller default resolution plus DT bindings
   - Reduce memory-allocation overhead
   - Improve intermediate buffer size computation
   - Fix allocation of temporary buffers
   - Fix pitch computation
   - Fix shadow plane allocation

  tegra:
   - use fbdev DMA helpers
   - Convert to devm_platform_ioremap_resource()
   - support bridge/connector
   - enable PM

  tidss:
   - Support TI AM625 plus DT bindings
   - Implement new connector model plus driver updates

  vkms:
   - improve write back support
   - docs fixes
   - support gamma LUT

  zynqmp-dpsub:
   - misc fixes"

* tag 'drm-next-2023-08-30' of git://anongit.freedesktop.org/drm/drm: (1327 commits)
  drm/gpuva_mgr: remove unused prev pointer in __drm_gpuva_sm_map()
  drm/tests/drm_kunit_helpers: Place correct function name in the comment header
  drm/nouveau: uapi: don't pass NO_PREFETCH flag implicitly
  drm/nouveau: uvmm: fix unset region pointer on remap
  drm/nouveau: sched: avoid job races between entities
  drm/i915: Fix HPD polling, reenabling the output poll work as needed
  drm: Add an HPD poll helper to reschedule the poll work
  drm/i915: Fix TLB-Invalidation seqno store
  drm/ttm/tests: Fix type conversion in ttm_pool_test
  drm/msm/a6xx: Bail out early if setting GPU OOB fails
  drm/msm/a6xx: Move LLC accessors to the common header
  drm/msm/a6xx: Introduce a6xx_llc_read
  drm/ttm/tests: Require MMU when testing
  drm/panel: simple: Fix Innolux G156HCE-L01 LVDS clock
  Revert "Revert "drm/amdgpu/display: change pipe policy for DCN 2.0""
  drm/amdgpu: Add memory vendor information
  drm/amd: flush any delayed gfxoff on suspend entry
  drm/amdgpu: skip fence GFX interrupts disable/enable for S0ix
  drm/amdgpu: Remove gfxoff check in GFX v9.4.3
  drm/amd/pm: Update pci link speed for smu v13.0.6
  ...
</pre>
</div>
</content>
</entry>
<entry>
<title>BackMerge tag 'v6.5-rc7' into drm-next</title>
<updated>2023-08-23T21:26:06+00:00</updated>
<author>
<name>Dave Airlie</name>
<email>airlied@redhat.com</email>
</author>
<published>2023-08-23T21:26:06+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=fdebffeba8b877368ddcc139c26278c1c97931a4'/>
<id>fdebffeba8b877368ddcc139c26278c1c97931a4</id>
<content type='text'>
Linux 6.5-rc7

This is needed for the CI stuff and the msm pull has fixes in it.

Signed-off-by: Dave Airlie &lt;airlied@redhat.com&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Linux 6.5-rc7

This is needed for the CI stuff and the msm pull has fixes in it.

Signed-off-by: Dave Airlie &lt;airlied@redhat.com&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>drm: bridge: samsung-dsim: Fix init during host transfer</title>
<updated>2023-08-18T08:38:36+00:00</updated>
<author>
<name>Frieder Schrempf</name>
<email>frieder.schrempf@kontron.de</email>
</author>
<published>2023-07-24T15:16:32+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=20c827683de05a6c7e7ae7fae586899690693251'/>
<id>20c827683de05a6c7e7ae7fae586899690693251</id>
<content type='text'>
In case the downstream bridge or panel uses DSI transfers before the
DSI host was actually initialized through samsung_dsim_atomic_enable()
which clears the stop state (LP11) mode, all transfers will fail.

This happens with downstream bridges that are controlled by DSI
commands such as the tc358762.

As documented in [1] DSI hosts are expected to allow transfers
outside the normal bridge enable/disable flow.

To fix this make sure that stop state is cleared in
samsung_dsim_host_transfer() which restores the previous
behavior.

We also factor out the common code to enable/disable stop state
to samsung_dsim_set_stop_state().

[1] https://docs.kernel.org/gpu/drm-kms-helpers.html#mipi-dsi-bridge-operation

Fixes: 0c14d3130654 ("drm: bridge: samsung-dsim: Fix i.MX8M enable flow to meet spec")
Reported-by: Tim Harvey &lt;tharvey@gateworks.com&gt;
Signed-off-by: Frieder Schrempf &lt;frieder.schrempf@kontron.de&gt;
Reviewed-by: Neil Armstrong &lt;neil.armstrong@linaro.org&gt;
Tested-by: Tim Harvey &lt;tharvey@gateworks.com&gt;
Signed-off-by: Neil Armstrong &lt;neil.armstrong@linaro.org&gt;
Link: https://patchwork.freedesktop.org/patch/msgid/20230724151640.555490-1-frieder@fris.de
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
In case the downstream bridge or panel uses DSI transfers before the
DSI host was actually initialized through samsung_dsim_atomic_enable()
which clears the stop state (LP11) mode, all transfers will fail.

This happens with downstream bridges that are controlled by DSI
commands such as the tc358762.

As documented in [1] DSI hosts are expected to allow transfers
outside the normal bridge enable/disable flow.

To fix this make sure that stop state is cleared in
samsung_dsim_host_transfer() which restores the previous
behavior.

We also factor out the common code to enable/disable stop state
to samsung_dsim_set_stop_state().

[1] https://docs.kernel.org/gpu/drm-kms-helpers.html#mipi-dsi-bridge-operation

Fixes: 0c14d3130654 ("drm: bridge: samsung-dsim: Fix i.MX8M enable flow to meet spec")
Reported-by: Tim Harvey &lt;tharvey@gateworks.com&gt;
Signed-off-by: Frieder Schrempf &lt;frieder.schrempf@kontron.de&gt;
Reviewed-by: Neil Armstrong &lt;neil.armstrong@linaro.org&gt;
Tested-by: Tim Harvey &lt;tharvey@gateworks.com&gt;
Signed-off-by: Neil Armstrong &lt;neil.armstrong@linaro.org&gt;
Link: https://patchwork.freedesktop.org/patch/msgid/20230724151640.555490-1-frieder@fris.de
</pre>
</div>
</content>
</entry>
<entry>
<title>drm: bridge: dw_hdmi: Fix ELD is not updated issue</title>
<updated>2023-08-04T08:31:41+00:00</updated>
<author>
<name>Sandor Yu</name>
<email>Sandor.yu@nxp.com</email>
</author>
<published>2023-08-04T06:11:45+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=6db96c7703edd6e37da8ca571dfe5e1ecb6010c1'/>
<id>6db96c7703edd6e37da8ca571dfe5e1ecb6010c1</id>
<content type='text'>
The ELD (EDID-Like Data) is not updated when the HDMI cable
is plugged into different HDMI monitors.
This is because the EDID is not updated in the HDMI HPD function.
As a result, the ELD data remains unchanged and may not reflect
the capabilities of the newly connected HDMI sink device.

To address this issue, the handle_plugged_change function should move to
the bridge_atomic_enable and bridge_atomic_disable functions.
Make sure the EDID is properly updated before updating ELD.

Signed-off-by: Sandor Yu &lt;Sandor.yu@nxp.com&gt;
Reviewed-by: Neil Armstrong &lt;neil.armstrong@linaro.org&gt;
Signed-off-by: Neil Armstrong &lt;neil.armstrong@linaro.org&gt;
Link: https://patchwork.freedesktop.org/patch/msgid/20230804061145.2824843-1-Sandor.yu@nxp.com
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
The ELD (EDID-Like Data) is not updated when the HDMI cable
is plugged into different HDMI monitors.
This is because the EDID is not updated in the HDMI HPD function.
As a result, the ELD data remains unchanged and may not reflect
the capabilities of the newly connected HDMI sink device.

To address this issue, the handle_plugged_change function should move to
the bridge_atomic_enable and bridge_atomic_disable functions.
Make sure the EDID is properly updated before updating ELD.

Signed-off-by: Sandor Yu &lt;Sandor.yu@nxp.com&gt;
Reviewed-by: Neil Armstrong &lt;neil.armstrong@linaro.org&gt;
Signed-off-by: Neil Armstrong &lt;neil.armstrong@linaro.org&gt;
Link: https://patchwork.freedesktop.org/patch/msgid/20230804061145.2824843-1-Sandor.yu@nxp.com
</pre>
</div>
</content>
</entry>
<entry>
<title>Revert "drm/bridge: lt9611: Do not generate HFP/HBP/HSA and EOT packet"</title>
<updated>2023-08-04T08:26:29+00:00</updated>
<author>
<name>Neil Armstrong</name>
<email>neil.armstrong@linaro.org</email>
</author>
<published>2023-08-02T08:52:22+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=3c6bd1b7e2043fb00ce6b622709d176609431406'/>
<id>3c6bd1b7e2043fb00ce6b622709d176609431406</id>
<content type='text'>
This reverts commit 8ddce13ae696 ("drm/bridge: lt9611: Do not generate
HFP/HBP/HSA and EOT packet") to fix display regression on the Dragonboard
845c (SDM845) devboard.

There's a mismatch on the real action of the following flags:
- MIPI_DSI_MODE_VIDEO_NO_HSA
- MIPI_DSI_MODE_VIDEO_NO_HFP
- MIPI_DSI_MODE_VIDEO_NO_HBP
which leads to a non-working display on qcom platforms.

Cc: Marek Vasut &lt;marex@denx.de&gt;
Cc: Robert Foss &lt;rfoss@kernel.org&gt;
Cc: Jagan Teki &lt;jagan@amarulasolutions.com&gt;
Cc: Dmitry Baryshkov &lt;dmitry.baryshkov@linaro.org&gt;
Cc: Abhinav Kumar &lt;quic_abhinavk@quicinc.com&gt;
Fixes: 8ddce13ae696 ("drm/bridge: lt9611: Do not generate HFP/HBP/HSA and EOT packet")
Reported-by: Amit Pundir &lt;amit.pundir@linaro.org&gt;
Closes: https://lore.kernel.org/r/CAMi1Hd0TD=2z_=bcDrht3H_wiLvAFcv8Z-U_r_KUOoeMc6UMjw@mail.gmail.com/
Tested-by: Amit Pundir &lt;amit.pundir@linaro.org&gt;
Acked-by: Dmitry Baryshkov &lt;dmitry.baryshkov@linaro.org&gt; #fix db845c
[narmstrong: fixed commit message format]
Signed-off-by: Neil Armstrong &lt;neil.armstrong@linaro.org&gt;
Link: https://patchwork.freedesktop.org/patch/msgid/20230802-revert-do-not-generate-hfp-hbp-hsa-eot-packet-v1-1-f8a20084e15a@linaro.org
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
This reverts commit 8ddce13ae696 ("drm/bridge: lt9611: Do not generate
HFP/HBP/HSA and EOT packet") to fix display regression on the Dragonboard
845c (SDM845) devboard.

There's a mismatch on the real action of the following flags:
- MIPI_DSI_MODE_VIDEO_NO_HSA
- MIPI_DSI_MODE_VIDEO_NO_HFP
- MIPI_DSI_MODE_VIDEO_NO_HBP
which leads to a non-working display on qcom platforms.

Cc: Marek Vasut &lt;marex@denx.de&gt;
Cc: Robert Foss &lt;rfoss@kernel.org&gt;
Cc: Jagan Teki &lt;jagan@amarulasolutions.com&gt;
Cc: Dmitry Baryshkov &lt;dmitry.baryshkov@linaro.org&gt;
Cc: Abhinav Kumar &lt;quic_abhinavk@quicinc.com&gt;
Fixes: 8ddce13ae696 ("drm/bridge: lt9611: Do not generate HFP/HBP/HSA and EOT packet")
Reported-by: Amit Pundir &lt;amit.pundir@linaro.org&gt;
Closes: https://lore.kernel.org/r/CAMi1Hd0TD=2z_=bcDrht3H_wiLvAFcv8Z-U_r_KUOoeMc6UMjw@mail.gmail.com/
Tested-by: Amit Pundir &lt;amit.pundir@linaro.org&gt;
Acked-by: Dmitry Baryshkov &lt;dmitry.baryshkov@linaro.org&gt; #fix db845c
[narmstrong: fixed commit message format]
Signed-off-by: Neil Armstrong &lt;neil.armstrong@linaro.org&gt;
Link: https://patchwork.freedesktop.org/patch/msgid/20230802-revert-do-not-generate-hfp-hbp-hsa-eot-packet-v1-1-f8a20084e15a@linaro.org
</pre>
</div>
</content>
</entry>
<entry>
<title>drm/bridge: it6505: Check power state with it6505-&gt;powered in IRQ handler</title>
<updated>2023-08-03T08:30:54+00:00</updated>
<author>
<name>Pin-yen Lin</name>
<email>treapking@chromium.org</email>
</author>
<published>2023-07-27T10:01:10+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=e9d699af3f65d62cf195f0e7a039400093ab2af2'/>
<id>e9d699af3f65d62cf195f0e7a039400093ab2af2</id>
<content type='text'>
On system resume, the driver might call it6505_poweron directly if the
runtime PM hasn't been enabled. In such case, pm_runtime_get_if_in_use
will always return 0 because dev-&gt;power.runtime_status stays at
RPM_SUSPENDED, and the IRQ will never be handled.

Use it6505-&gt;powered from the driver struct fixes this because it always
gets updated when it6505_poweron is called.

Fixes: 5eb9a4314053 ("drm/bridge: it6505: Guard bridge power in IRQ handler")
Signed-off-by: Pin-yen Lin &lt;treapking@chromium.org&gt;
Reviewed-by: Neil Armstrong &lt;neil.armstrong@linaro.org&gt;
Signed-off-by: Neil Armstrong &lt;neil.armstrong@linaro.org&gt;
Link: https://patchwork.freedesktop.org/patch/msgid/20230727100131.2338127-1-treapking@chromium.org
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
On system resume, the driver might call it6505_poweron directly if the
runtime PM hasn't been enabled. In such case, pm_runtime_get_if_in_use
will always return 0 because dev-&gt;power.runtime_status stays at
RPM_SUSPENDED, and the IRQ will never be handled.

Use it6505-&gt;powered from the driver struct fixes this because it always
gets updated when it6505_poweron is called.

Fixes: 5eb9a4314053 ("drm/bridge: it6505: Guard bridge power in IRQ handler")
Signed-off-by: Pin-yen Lin &lt;treapking@chromium.org&gt;
Reviewed-by: Neil Armstrong &lt;neil.armstrong@linaro.org&gt;
Signed-off-by: Neil Armstrong &lt;neil.armstrong@linaro.org&gt;
Link: https://patchwork.freedesktop.org/patch/msgid/20230727100131.2338127-1-treapking@chromium.org
</pre>
</div>
</content>
</entry>
<entry>
<title>drm: bridge: dw_hdmi: Add cec suspend/resume functions</title>
<updated>2023-08-03T08:28:43+00:00</updated>
<author>
<name>Sandor Yu</name>
<email>Sandor.yu@nxp.com</email>
</author>
<published>2023-07-21T12:44:15+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=db1184e410744a680f92ca21e5acd5ae54510db8'/>
<id>db1184e410744a680f92ca21e5acd5ae54510db8</id>
<content type='text'>
CEC interrupt status/mask and logical address registers
will be reset when device enter suspend.
It will cause cec fail to work after device resume.
Add CEC suspend/resume functions, reinitialize logical address registers
and restore interrupt status/mask registers after resume.

Signed-off-by: Sandor Yu &lt;Sandor.yu@nxp.com&gt;
Reviewed-by: Neil Armstrong &lt;neil.armstrong@linaro.org&gt;
Signed-off-by: Neil Armstrong &lt;neil.armstrong@linaro.org&gt;
Link: https://patchwork.freedesktop.org/patch/msgid/20230721124415.1513223-1-Sandor.yu@nxp.com
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
CEC interrupt status/mask and logical address registers
will be reset when device enter suspend.
It will cause cec fail to work after device resume.
Add CEC suspend/resume functions, reinitialize logical address registers
and restore interrupt status/mask registers after resume.

Signed-off-by: Sandor Yu &lt;Sandor.yu@nxp.com&gt;
Reviewed-by: Neil Armstrong &lt;neil.armstrong@linaro.org&gt;
Signed-off-by: Neil Armstrong &lt;neil.armstrong@linaro.org&gt;
Link: https://patchwork.freedesktop.org/patch/msgid/20230721124415.1513223-1-Sandor.yu@nxp.com
</pre>
</div>
</content>
</entry>
<entry>
<title>drm/bridge: fix -Wunused-const-variable= warning</title>
<updated>2023-07-31T09:14:24+00:00</updated>
<author>
<name>Zhu Wang</name>
<email>wangzhu9@huawei.com</email>
</author>
<published>2023-07-31T02:13:45+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=132b6512e69453bac0db1437c143e7751c0c88d4'/>
<id>132b6512e69453bac0db1437c143e7751c0c88d4</id>
<content type='text'>
When building with W=1, the following warning occurs.

drivers/gpu/drm/bridge/analogix/analogix-anx78xx.c:48:17: warning: ‘anx781x_i2c_addresses’ defined but not used [-Wunused-const-variable=]  static const u8 anx781x_i2c_addresses[] = {
                 ^~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/bridge/analogix/analogix-anx78xx.c:40:17: warning: ‘anx7808_i2c_addresses’ defined but not used [-Wunused-const-variable=]  static const u8 anx7808_i2c_addresses[] = {

When CONFIG_IO is disabled, above two variables are not used,
since the place where it is used is inclueded in the macro
CONFIG_OF.

Even for drivers that do not depend on CONFIG_OF, it's almost
always better to leave out the of_match_ptr(), since the only
thing it can possibly do is to save a few bytes of .text if a
driver can be used both with and without it. Hence we remove
all of_match_ptr() used in other places.

Fixes: 0647e7dd3f7a ("drm/bridge: Add Analogix anx78xx support")
Signed-off-by: Zhu Wang &lt;wangzhu9@huawei.com&gt;
Reviewed-by: Arnd Bergmann &lt;arnd@arndb.de&gt;
Acked-by: Uwe Kleine-König &lt;u.kleine-koenig@pengutronix.de&gt;
Signed-off-by: Robert Foss &lt;rfoss@kernel.org&gt;
Link: https://patchwork.freedesktop.org/patch/msgid/20230731021345.219588-1-wangzhu9@huawei.com
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
When building with W=1, the following warning occurs.

drivers/gpu/drm/bridge/analogix/analogix-anx78xx.c:48:17: warning: ‘anx781x_i2c_addresses’ defined but not used [-Wunused-const-variable=]  static const u8 anx781x_i2c_addresses[] = {
                 ^~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/bridge/analogix/analogix-anx78xx.c:40:17: warning: ‘anx7808_i2c_addresses’ defined but not used [-Wunused-const-variable=]  static const u8 anx7808_i2c_addresses[] = {

When CONFIG_IO is disabled, above two variables are not used,
since the place where it is used is inclueded in the macro
CONFIG_OF.

Even for drivers that do not depend on CONFIG_OF, it's almost
always better to leave out the of_match_ptr(), since the only
thing it can possibly do is to save a few bytes of .text if a
driver can be used both with and without it. Hence we remove
all of_match_ptr() used in other places.

Fixes: 0647e7dd3f7a ("drm/bridge: Add Analogix anx78xx support")
Signed-off-by: Zhu Wang &lt;wangzhu9@huawei.com&gt;
Reviewed-by: Arnd Bergmann &lt;arnd@arndb.de&gt;
Acked-by: Uwe Kleine-König &lt;u.kleine-koenig@pengutronix.de&gt;
Signed-off-by: Robert Foss &lt;rfoss@kernel.org&gt;
Link: https://patchwork.freedesktop.org/patch/msgid/20230731021345.219588-1-wangzhu9@huawei.com
</pre>
</div>
</content>
</entry>
<entry>
<title>Merge drm/drm-next into drm-misc-next</title>
<updated>2023-07-24T13:44:47+00:00</updated>
<author>
<name>Thomas Zimmermann</name>
<email>tzimmermann@suse.de</email>
</author>
<published>2023-07-24T13:44:47+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=61b7369483efb5e0a9f3b48e75fac00d46d661e0'/>
<id>61b7369483efb5e0a9f3b48e75fac00d46d661e0</id>
<content type='text'>
Backmerging to get v6.5-rc2.

Signed-off-by: Thomas Zimmermann &lt;tzimmermann@suse.de&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Backmerging to get v6.5-rc2.

Signed-off-by: Thomas Zimmermann &lt;tzimmermann@suse.de&gt;
</pre>
</div>
</content>
</entry>
</feed>
