review.tizen.org Git - platform/kernel/linux-rpi.git/log

udmabuf: fix general protection fault in udmabuf_create

Syzbot reported general protection fault in udmabuf_create. The problem
was in wrong error handling.

In commit 16c243e99d33 ("udmabuf: Add support for mapping hugepages (v4)")
shmem_read_mapping_page() call was replaced with find_get_page_flags(),
but find_get_page_flags() returns NULL on failure instead PTR_ERR().

Wrong error checking was causing GPF in get_page(), since passed page
was equal to NULL. Fix it by changing if (IS_ER(!hpage)) to if (!hpage)

Reported-by: syzbot+e9cd3122a37c5d6c51e8@syzkaller.appspotmail.com
Fixes: 16c243e99d33 ("udmabuf: Add support for mapping hugepages (v4)")
Signed-off-by: Pavel Skripkin <paskripkin@gmail.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20210811175052.21254-1-paskripkin@gmail.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

drm/ingenic: Use standard drm_atomic_helper_commit_tail

By making the CRTC's .vblank_enable() function return an error when it
is known that the hardware won't deliver a VBLANK, we can drop the
ingenic_drm_atomic_helper_commit_tail() function and use the standard
drm_atomic_helper_commit_tail() function instead.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210808134526.119198-4-paul@crapouillou.net

drm/ingenic: Remove dead code

The priv->ipu_plane would get a different value further down the code,
without the first assigned value being read first; so the first
assignation can be dropped.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20210808134526.119198-2-paul@crapouillou.net

drm: IRQ midlayer is now legacy

Hide the DRM midlayer behind CONFIG_DRM_LEGACY, make functions use
the prefix drm_legacy_, and move declarations to drm_legacy.h.
In struct drm_device, move the fields irq and irq_enabled behind
CONFIG_DRM_LEGACY.

All callers have been updated.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210803090704.32152-15-tzimmermann@suse.de

drm: Remove unused devm_drm_irq_install()

DRM IRQ helpers will become legacy. The function devm_drm_irq_install()
is unused and won't be required later.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210803090704.32152-14-tzimmermann@suse.de

drm/vc4: Convert to Linux IRQ interfaces

Drop the DRM IRQ midlayer in favor of Linux IRQ interfaces. DRM's
IRQ helpers are mostly useful for UMS drivers. Modern KMS drivers
don't benefit from using it.

DRM IRQ callbacks are now being called directly or inlined.

Calls to platform_get_irq() can fail with a negative errno code.
Abort initialization in this case. The DRM IRQ midlayer does not
handle this case correctly.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210803090704.32152-13-tzimmermann@suse.de

drm/tilcdc: Convert to Linux IRQ interfaces

Drop the DRM IRQ midlayer in favor of Linux IRQ interfaces. DRM's
IRQ helpers are mostly useful for UMS drivers. Modern KMS drivers
don't benefit from using it.

DRM IRQ callbacks are now being called directly or inlined.

Calls to platform_get_irq() can fail with a negative errno code.
Abort initialization in this case. The DRM IRQ midlayer does not
handle this case correctly.

For most drivers, only the DRM IRQ helpers use irq_enabled from
struct drm_device. Tilcdc also uses irq_enabled to make its error
rollback work correctly. As the field will become legacy, duplicated
the state in the driver's local private structure.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210803090704.32152-12-tzimmermann@suse.de

drm/tidss: Convert to Linux IRQ interfaces

Drop the DRM IRQ midlayer in favor of Linux IRQ interfaces. DRM's
IRQ helpers are mostly useful for UMS drivers. Modern KMS drivers
don't benefit from using it.

DRM IRQ callbacks are now being called directly or inlined.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210803090704.32152-11-tzimmermann@suse.de

drm/radeon: Convert to Linux IRQ interfaces

Drop the DRM IRQ midlayer in favor of Linux IRQ interfaces. DRM's
IRQ helpers are mostly useful for UMS drivers. Modern KMS drivers
don't benefit from using it.

DRM IRQ callbacks are now being called directly or inlined.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210803090704.32152-10-tzimmermann@suse.de

drm/mxsfb: Convert to Linux IRQ interfaces

Drop the DRM IRQ midlayer in favor of Linux IRQ interfaces. DRM's
IRQ helpers are mostly useful for UMS drivers. Modern KMS drivers
don't benefit from using it.

DRM IRQ callbacks are now being called directly or inlined.

Calls to platform_get_irq() can fail with a negative errno code.
Abort initialization in this case. The DRM IRQ midlayer does not
handle this case correctly.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210803090704.32152-9-tzimmermann@suse.de

drm/msm: Convert to Linux IRQ interfaces

Drop the DRM IRQ midlayer in favor of Linux IRQ interfaces. DRM's
IRQ helpers are mostly useful for UMS drivers. Modern KMS drivers
don't benefit from using it.

DRM IRQ callbacks are now being called directly or inlined.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Abhinav Kumar <abhinavk@codeaurora.org>
Acked-by: Rob Clark <robdclark@chromium.org>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210803090704.32152-8-tzimmermann@suse.de

drm/kmb: Convert to Linux IRQ interfaces

Drop the DRM IRQ midlayer in favor of Linux IRQ interfaces. DRM's
IRQ helpers are mostly useful for UMS drivers. Modern KMS drivers
don't benefit from using it.

DRM IRQ callbacks are now being called directly or inlined.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Tested-by: Anitha Chrisanthus <anitha.chrisanthus@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210803090704.32152-7-tzimmermann@suse.de

drm/gma500: Convert to Linux IRQ interfaces

Drop the DRM IRQ midlayer in favor of Linux IRQ interfaces. DRM's
IRQ helpers are mostly useful for UMS drivers. Modern KMS drivers
don't benefit from using it. DRM IRQ callbacks are now being called
directly or inlined.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210803090704.32152-6-tzimmermann@suse.de

drm/fsl-dcu: Convert to Linux IRQ interfaces

Drop the DRM IRQ midlayer in favor of Linux IRQ interfaces. DRM's
IRQ helpers are mostly useful for UMS drivers. Modern KMS drivers
don't benefit from using it. DRM IRQ callbacks are now being called
directly or inlined.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210803090704.32152-5-tzimmermann@suse.de

drm/atmel-hlcdc: Convert to Linux IRQ interfaces

Drop the DRM IRQ midlayer in favor of Linux IRQ interfaces. DRM's
IRQ helpers are mostly useful for UMS drivers. Modern KMS drivers
don't benefit from using it. DRM IRQ callbacks are now being called
directly or inlined.

v2:
* use managed release via devm_request_irq() (Sam)
* drop extra test for irq != IRQ_NOTCONNECTED (Sam)

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Tested-by: Dan Sneddon <Dan.Sneddon@microchip.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210803090704.32152-4-tzimmermann@suse.de

drm/arm/hdlcd: Convert to Linux IRQ interfaces

Drop the DRM IRQ midlayer in favor of Linux IRQ interfaces. DRM's
IRQ helpers are mostly useful for UMS drivers. Modern KMS drivers
don't benefit from using it.

DRM IRQ callbacks are now being called directly or inlined.

Calls to platform_get_irq() can fail with a negative errno code.
Abort initialization in this case. The DRM IRQ midlayer does not
handle this case correctly.

v2:
* name struct drm_device variables 'drm' (Sam)

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210803090704.32152-3-tzimmermann@suse.de

drm/amdgpu: Convert to Linux IRQ interfaces

Drop the DRM IRQ midlayer in favor of Linux IRQ interfaces. DRM's
IRQ helpers are mostly useful for UMS drivers. Modern KMS drivers
don't benefit from using it.

DRM IRQ callbacks are now being called directly or inlined.

The interrupt number returned by pci_msi_vector() is now stored
in struct amdgpu_irq. Calls to pci_msi_vector() can fail and return
a negative errno code. Abort initlaizaton in thi case. The DRM IRQ
midlayer does not handle this correctly.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210803090704.32152-2-tzimmermann@suse.de

dma-buf: Fix a few typos in dma-buf documentation

Fix a few typos in the documentation:
- Remove an extraneous 'or'
- 'unpins' -> 'unpin'
- 'braket' -> 'bracket'
- 'mappinsg' -> 'mappings'
- 'fullfills' -> 'fulfills'

Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Gal Pressman <galpress@amazon.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210809122247.15869-1-galpress@amazon.com

drm/vmwgfx: Replace "vmw_num_pages" with "PFN_UP"

we counld use PFN_UP instead of vmw_num_pages()

Signed-off-by: Cai Huoqing <caihuoqing@baidu.com>
Signed-off-by: Zack Rusin <zackr@vmware.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210802033552.990-1-caihuoqing@baidu.com

drm/vmwgfx: Make use of PFN_ALIGN/PFN_UP helper macro

it's a refactor to make use of PFN_ALIGN/PFN_UP helper macro

Signed-off-by: Cai Huoqing <caihuoqing@baidu.com>
Signed-off-by: Zack Rusin <zackr@vmware.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210802033308.927-1-caihuoqing@baidu.com

drm/vmwgfx: fix potential UAF in vmwgfx_surface.c

drm_file.master should be protected by either drm_device.master_mutex
or drm_file.master_lookup_lock when being dereferenced. However,
drm_master_get is called on unprotected file_priv->master pointers in
vmw_surface_define_ioctl and vmw_gb_surface_define_internal.

This is fixed by replacing drm_master_get with drm_file_get_master.

Signed-off-by: Desmond Cheong Zhi Xi <desmondcheongzx@gmail.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Zack Rusin <zackr@vmware.com>
Signed-off-by: Zack Rusin <zackr@vmware.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210724111824.59266-4-desmondcheongzx@gmail.com

drm/vmwgfx: Use list_move_tail instead of list_del/list_add_tail in vmwgfx_cmdbuf_res.c

Using list_move_tail() instead of list_del() + list_add_tail() in vmwgfx_cmdbuf_res.c.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Baokun Li <libaokun1@huawei.com>
Signed-off-by: Zack Rusin <zackr@vmware.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210609072248.1353421-1-libaokun1@huawei.com

drm/vmwgfx: Use list_move_tail instead of list_del/list_add_tail in vmwgfx_cmdbuf.c

Using list_move_tail() instead of list_del() + list_add_tail() in vmwgfx_cmdbuf.c.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Baokun Li <libaokun1@huawei.com>
Signed-off-by: Zack Rusin <zackr@vmware.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210609071803.1347254-1-libaokun1@huawei.com

drm/vmwgfx: Remove the repeated declaration

Function 'vmw_context_binding_list' is declared twice, remove the
repeated declaration.

Cc: VMware Graphics <linux-graphics-maintainer@vmware.com>
Cc: Roland Scheidegger <sroland@vmware.com>
Cc: Zack Rusin <zackr@vmware.com>
Signed-off-by: Shaokun Zhang <zhangshaokun@hisilicon.com>
Signed-off-by: Zack Rusin <zackr@vmware.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1621930170-54923-1-git-send-email-zhangshaokun@hisilicon.com

drm/vkms: Use offset-adjusted shadow-plane mappings and output

For framebuffers with non-zero offset fields, shadow-plane helpers
provide a pointer to the first byte of the contained data. Use it in
vkms.

Also provide use the offset-adjusted data address for the writeback
job's output buffers. Output framebuffers with non-zero offsets now
have their content written to the correct location.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210803125928.27780-12-tzimmermann@suse.de

drm/vbox: Use offset-adjusted shadow-plane mappings

For framebuffers with non-zero offset fields, shadow-plane helpers
provide a pointer to the first byte of the contained data. Use it in
vbox.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210803125928.27780-11-tzimmermann@suse.de

drm/udl: Use offset-adjusted shadow-plane mapping

For framebuffers with non-zero offset fields, shadow-plane helpers
provide a pointer to the first byte of the contained data. Use it in
udl.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210803125928.27780-10-tzimmermann@suse.de

drm/simpledrm: Use offset-adjusted shadow-plane mapping

For framebuffers with non-zero offset fields, shadow-plane helpers
provide a pointer to the first byte of the contained data. Use it in
simpledrm.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210803125928.27780-9-tzimmermann@suse.de

drm/gm12u320: Use offset-adjusted shadow-plane mappings

For framebuffers with non-zero offset fields, shadow-plane helpers
provide a pointer to the first byte of the contained data. Use it in
gm12u320.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210803125928.27780-8-tzimmermann@suse.de

drm/cirrus: Use offset-adjusted shadow-plane mappings

For framebuffers with non-zero offset fields, shadow-plane helpers
provide a pointer to the first byte of the contained data. Use it in
cirrus.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210803125928.27780-7-tzimmermann@suse.de

drm/mgag200: Use offset-adjusted shadow-plane mappings

For framebuffers with non-zero offset fields, shadow-plane helpers
provide a pointer to the first byte of the contained data. Use it in
mgag200.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210803125928.27780-6-tzimmermann@suse.de

drm/hyperv: Use offset-adjusted shadow-plane mappings

For framebuffers with non-zero offset fields, shadow-plane helpers
provide a pointer to the first byte of the contained data. Use it in
hyperv.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210803125928.27780-5-tzimmermann@suse.de

drm/gud: Get offset-adjusted mapping from drm_gem_fb_vmap()

Pass the data parameter to drm_gem_fb_vmap() to retrieve pointers
to the data. This address is different from the mapping addresses
for framebuffers with non-zero offsets. Replaces gud's internal
computation.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210803125928.27780-4-tzimmermann@suse.de

drm/ast: Use offset-adjusted shadow-plane mappings

For framebuffers with non-zero offset fields, shadow-plane helpers
provide a pointer to the first byte of the contained data. Use it in
ast.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210803125928.27780-3-tzimmermann@suse.de

drm/gem: Provide offset-adjusted framebuffer BO mappings

Add an additional argument to drm_gem_fb_vmap() to return each BO's
mapping adjusted by the respective offset. Update all callers.

The newly returned values point to the first byite of the data stored
in the framebuffer BOs. Drivers that access the BO data should use it.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210803125928.27780-2-tzimmermann@suse.de

drm/mgag200: Compute PLL values during atomic check

PLL setup can fail if the display mode's clock is not supported by
any PLL configuration. Compute the PLL values during atomic check, so
that atomic commits can fail at the appropriate time. If successful,
use the values in the atomic-update phase.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210714142240.21979-14-tzimmermann@suse.de

drm/mgag200: Introduce custom CRTC state

Inherit from struct drm_crtc_state by embeding it and providing the
rsp callbacks for simple-kms helpers. No functional changes.

The new state struct mgag200_crtc_state will hold PLL values for modeset
operations.

v2:
* move the simple-kms changes into a separate patch (Sam)

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210714142240.21979-13-tzimmermann@suse.de

drm/simple-kms: Support custom CRTC state

Simple KMS helpers already support custom state for planes. Extend the
helpers to support custom CRTC state as well. Drivers can set the reset,
duplicate and destroy callbacks for the display pipeline's CRTC state
and inherit from struct drm_crtc_state by embedding an instance.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210714142240.21979-12-tzimmermann@suse.de

drm/mgag200: Abstract pixel PLL via struct mgag200_pll

Move all PLL compute and update functions into mgag200_pll.c. No
functional changes to the rsp algorithms.

Introduce struct mgag200_pll and mgag200_pll_funcs. The data strutures
abstract the details of each revision's PLL. Perform calls to compute
and update functionality via function pointers. Init the PLL once as
part of the driver initialization.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210714142240.21979-11-tzimmermann@suse.de

drm/mgag200: Declare PLL clock constants static const

Move the PLL constants to the RO data section by declaring them as
static const. No functional changes.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210714142240.21979-10-tzimmermann@suse.de

drm/mgag200: Split PLL compute function for G200SE by rev

The compute function for G200SE pixel PLLs handles two revisions with
different algorithms. Split it accordingly to make it readable. No
functional changes.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210714142240.21979-9-tzimmermann@suse.de

drm/mgag200: Split PLL compute functions by device type

Several PLL functions compute values for different device types. Split
them up to make the code more readable. No functional changes.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210714142240.21979-8-tzimmermann@suse.de

drm/mgag200: Store values (not bits) in struct mgag200_pll_values

The fields in struct mgag200_pll_values currently hold the bits of
each register. Store the PLL values instead and let the PLL-update
code figure out the bits for each register.

Until now, the compute function either stored plain values or register
bits in struct mgag200_pll_values. The rsp update function used the
values as-is. This made it very hard to correctly interpret the stored
values (e.g., for logging or debugging). With the cleanup, the stored
values now have a clear meaning.

v2:
* add a bit more context in the commit message (Sam)

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210714142240.21979-7-tzimmermann@suse.de

drm/mgag200: Introduce separate variable for PLL S parameter

The S parameter is controls the loop filter bandwidth when programming
the PLL. It's currently stored as part of P (i.e., the clock divider.)

Add a separate variable for S prepares the PLL code for further
refactoring. The value of s is currently 0, so it has not yet an effect
on the programming.

v2:
* add a note on the current value of s to commit message

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210714142240.21979-6-tzimmermann@suse.de

drm/mgag200: Split PLL setup into compute and update functions

The _set_plls() functions compute a pixel clock's PLL values
and program the hardware accordingly. This happens during atomic
commits.

For atomic modesetting, it's better to separate computation and
programming from each other. This will allow to compute the PLL
value during atomic checks and catch unsupported modes early.

Split the PLL setup into a compute and an update functions, and
call them one after the other. Computed PLL values are store in
struct mgag200_pll_values. There are four parameters for the PLL,
m, n, p and s. Every compute function stores a value for each
of these parameters, and the rsp update function makes the register
bits from them. The values stored by the compute function are
either plain values or register bits. An additional change is
required to always store plain values.

No functional changes.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210714142240.21979-5-tzimmermann@suse.de

drm/mgag200: Remove P_ARRAY_SIZE

Replace P_ARRAY_SIZE by array pre-initializing and ARRAY_SIZE(). No
functional changes.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210714142240.21979-4-tzimmermann@suse.de

drm/mgag200: Return errno codes from PLL compute functions

Return -EINVAL if there's no PLL configuration for the given pixel
clock. The returned errors are currently ignored by the caller, but
the errno codes will become useful when the compute functions run
during atomic checks.

v2:
* give a rational for this change (Sam)

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210714142240.21979-3-tzimmermann@suse.de

drm/mgag200: Select clock in PLL update functions

Put the clock-selection code into each of the PLL-update functions to
make them select the correct pixel clock. Instead of copying the code,
introduce a new helper WREG_MISC_MASKED, which does masked writes into
<MISC>. Use it from each individual PLL update function.

The pixel clock for video output was not actually set before programming
the clock's values. It worked because the device had the correct clock
pre-set.

v2:
* don't duplicate <MISC> update code (Sam)

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Fixes: db05f8d3dc87 ("drm/mgag200: Split MISC register update into PLL selection, SYNC and I/O")
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Emil Velikov <emil.velikov@collabora.com>
Cc: Dave Airlie <airlied@redhat.com>
Cc: dri-devel@lists.freedesktop.org
Cc: <stable@vger.kernel.org> # v5.9+
Link: https://patchwork.freedesktop.org/patch/msgid/20210714142240.21979-2-tzimmermann@suse.de

drm/bridge: anx7625: Tune K value for IVO panel

IVO panel require less input video clock variation than video clock
variation in DP CTS spec.

This patch decreases the K value of ANX7625 which will shrink eDP Tx
video clock variation to meet IVO panel's requirement.

Acked-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Xin Ji <xji@analogixsemi.com>
Signed-off-by: Robert Foss <robert.foss@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210806104407.2208538-1-xji@analogixsemi.com

drm: bridge: it66121: Check drm_bridge_attach retval

The return value of drm_bridge_attach() is ignored during
the it66121_bridge_attach() call, which is incorrect.

Fixes: 988156dc2fc9 ("drm: bridge: add it66121 driver")
Signed-off-by: Robert Foss <robert.foss@linaro.org>
Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210805185039.402178-1-robert.foss@linaro.org
Link: https://patchwork.freedesktop.org/patch/msgid/20210805185039.402178-1-robert.foss@linaro.org

drm/panel: simple: add LOGIC Technologies LTTD800480070-L6WH-RT

Add support for the LOGIC Technologies, Inc LTTD800480070-L6WH-RT

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Co-developed-by: Søren Andersen <san@skov.dk>
Signed-off-by: Søren Andersen <san@skov.dk>
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210805111944.13533-3-o.rempel@pengutronix.de

drm/panel: simple: add Multi-Innotechnology MI1010AIT-1CP1

The Multi Innotechnology is a 10.1" 1280x800 panel.

The datasheet did not specify specific values for sync, back, front porch.
The values are a best guess based on values for similar panels.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Co-developed-by: Ulrich Ölmann <u.oelmann@pengutronix.de>
Signed-off-by: Ulrich Ölmann <u.oelmann@pengutronix.de>
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210805111944.13533-2-o.rempel@pengutronix.de

drm: nouveau: fix disp.c build when NOUVEAU_BACKLIGHT is not enabled

Fix build errors and warnings when CONFIG_DRM_NOUVEAU_BACKLIGHT is not set

../drivers/gpu/drm/nouveau/dispnv50/disp.c: In function ‘nv50_sor_atomic_disable’:
../drivers/gpu/drm/nouveau/dispnv50/disp.c:1665:52: error: ‘struct nouveau_connector’ has no member named ‘backlight’
  struct nouveau_backlight *backlight = nv_connector->backlight;
                                                    ^~
../drivers/gpu/drm/nouveau/dispnv50/disp.c:1670:28: error: dereferencing pointer to incomplete type ‘struct nouveau_backlight’
  if (backlight && backlight->uses_dpcd) {

and then fix subsequent build warnings after the above are fixed:

../drivers/gpu/drm/nouveau/dispnv50/disp.c: In function ‘nv50_sor_atomic_disable’:
../drivers/gpu/drm/nouveau/dispnv50/disp.c:1669:6: warning: unused variable ‘ret’ [-Wunused-variable]
  int ret;
      ^~~
../drivers/gpu/drm/nouveau/dispnv50/disp.c:1662:22: warning: unused variable ‘drm’ [-Wunused-variable]
  struct nouveau_drm *drm = nouveau_drm(nv_encoder->base.base.dev);
                      ^~~

Fixes: 6eca310e8924 ("drm/nouveau/kms/nv50-: Add basic DPCD backlight support for nouveau")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: dri-devel@lists.freedesktop.org
Cc: nouveau@lists.freedesktop.org
Cc: Lyude Paul <lyude@redhat.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Karol Herbst <kherbst@redhat.com>
Signed-off-by: Karol Herbst <kherbst@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210714171523.413-1-rdunlap@infradead.org

drm: add lockdep assert to drm_is_current_master_locked

In drm_is_current_master_locked, accessing drm_file.master should be
protected by either drm_file.master_lookup_lock or
drm_device.master_mutex. This was previously awkward to assert with
lockdep.

Following patch ("locking/lockdep: Provide lockdep_assert{,_once}()
helpers"), this assertion is now convenient. So we add in the
assertion and explain this lock design in the kerneldoc.

Signed-off-by: Desmond Cheong Zhi Xi <desmondcheongzx@gmail.com>
Acked-by: Boqun Feng <boqun.feng@gmail.com>
Acked-by: Waiman Long <longman@redhat.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210802105957.77692-3-desmondcheongzx@gmail.com

locking/lockdep: Provide lockdep_assert{,_once}() helpers

Extract lockdep_assert{,_once}() helpers to more easily write composite
assertions like, for example:

lockdep_assert(lockdep_is_held(&drm_device.master_mutex) ||
lockdep_is_held(&drm_file.master_lookup_lock));

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Desmond Cheong Zhi Xi <desmondcheongzx@gmail.com>
Acked-by: Boqun Feng <boqun.feng@gmail.com>
Acked-by: Waiman Long <longman@redhat.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210802105957.77692-2-desmondcheongzx@gmail.com

drm/panel: Add ilitek ili9341 panel driver

This driver combines tiny/ili9341.c mipi_dbi_interface driver
with mipi_dpi_interface driver, can support ili9341 with serial
mode and parallel rgb interface mode by different dts bindings.

Signed-off-by: Dillon Min <dillon.minfei@gmail.com>
Reported-by: kernel test robot <lkp@intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/1627098243-2742-4-git-send-email-dillon.minfei@gmail.com

dt-bindings: display: panel: Add ilitek ili9341 panel bindings

Add documentation for "ilitek,ili9341" panel.

Signed-off-by: Dillon Min <dillon.minfei@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/lkml/1626853288-31223-2-git-send-email-dillon.minfei@gmail.com/
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/1627098243-2742-2-git-send-email-dillon.minfei@gmail.com

drm/panel-simple: add Gopher 2b LCD panel

The Gopher 2b LCD panel is used in Gopher 2b handhelds.
It's simple panel with NewVision NV3047 driver, but SPI lines are not
connected. It has no specific name, since it's unique to that handheld.
lot name at AliExpress: 4.3 inch 40PIN TFT LCD Screen COG NV3047 Drive
IC 480(RGB)*272 No Touch 24Bit RGB Interface

Signed-off-by: Artjom Vejsel <akawolf0@gmail.com>
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20210804002353.76385-4-akawolf0@gmail.com

dt-bindings: Add DT bindings for QiShenglong Gopher 2b panel

Add DT bindings for QiShenglong Gopher 2b 4.3" 480(RGB)x272 TFT LCD
panel.

Signed-off-by: Artjom Vejsel <akawolf0@gmail.com>
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20210804002353.76385-3-akawolf0@gmail.com

drm/vkms: Map output framebuffer BOs with drm_gem_fb_vmap()

Abstract the framebuffer details by mappings its BOs with a call
to drm_gem_fb_vmap(). Unmap with drm_gem_fb_vunamp().

Before, the output address with stored as raw pointer in the priv
field of struct drm_writeback_job. Introduce the new type
struct vkms_writeback_job, which holds the output mappings addresses
while the writeback job is active.

The patchset also cleans up some internal casting an setup of the
output addresses. No functional changes.

v3:
* free instances of struct vkms_writeback_job on cleanup
or errors

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210730183511.20080-6-tzimmermann@suse.de

drm/gud: Map framebuffer BOs with drm_gem_fb_vmap()

Abstract the framebuffer details by mapping its BOs with a call
to drm_gem_fb_vmap(). Unmap with drm_gem_fb_vunmap().

The call to drm_gem_fb_vmap() ensures that all BOs are mapped
correctly. Gud still only supports single-plane formats.

No functional changes.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Noralf Trønnes <noralf@tronnes.org>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210730183511.20080-5-tzimmermann@suse.de

drm/gem: Clear mapping addresses for unused framebuffer planes

Set the returned mapping address to NULL if a framebuffer plane does
not have a BO associated with it. Likewise, ignore mappings of NULL
during framebuffer unmap operations. Allows users of the functions to
perform unmap operations of certain BOs by themselfes.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210730183511.20080-4-tzimmermann@suse.de

drm/gem: Provide drm_gem_fb_{vmap,vunmap}()

Move framebuffer vmap code from shadow-buffered plane state into the new
interfaces drm_gem_fb_vmap() and drm_gem_fb_vunmap(). These functions
provide mappings of a framebuffer's BOs into kernel address space. No
functional changes.

v4:
* remove duplicated blank line
v2:
* using [static N] for array parameters enables compile-time checks
* include <drm/drm_fourcc.h> for DRM_FORMAT_MAX_PLANES (kernel
test robot)

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210730183511.20080-3-tzimmermann@suse.de

drm: Define DRM_FORMAT_MAX_PLANES

DRM uses a magic number of 4 for the maximum number of planes per color
format. Declare this constant via DRM_FORMAT_MAX_PLANES and update the
related code. Some code depends on the length of arrays that are now
declared with DRM_FORMAT_MAX_PLANES. Convert it from '4' to ARRAY_SIZE.

v2:
* mention usage of ARRAY_SIZE() in the commit message (Maxime)
* also fix error handling in drm_gem_fb_init_with_funcs()
(kernel test robot)
* include <drm/drm_fourcc.h> for DRM_FORMAT_MAX_PLANES

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210730183511.20080-2-tzimmermann@suse.de

drm: document drm_mode_get_property

It's not obvious what the fields mean and how they should be used.
The most important detail is the link to drm_property.flags, which
describes how property types work.

v2: document enum drm_mode_property_enum, add ref to "Modeset Base
Object Abstraction" (Daniel)

Signed-off-by: Simon Ser <contact@emersion.fr>
Acked-by: Pekka Paalanen <pekka.paalanen@collabora.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Leandro Ribeiro <leandro.ribeiro@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210802072826.500078-1-contact@emersion.fr

drm: Fix oops in damage self-tests by mocking damage property

I've added a new check to make sure that drivers which insepct the
damage property have it set up correctly, but somehow missed that this
borke the damage selftest in the CI result noise.

Fix it up by mocking enough of drm_device and drm_plane so we can call
drm_plane_enable_fb_damage_clips() to make the new check happy.

Since there's a lot of duplicated mock code already copy-pasted into
each test I've also refactored this a bit to trim it down.

v2: Squash in fixup from 0day for

drivers/gpu/drm/selftests/test-drm_damage_helper.c:15:19: warning: symbol 'mock_device' was not declared. Should it be static?
drivers/gpu/drm/selftests/test-drm_damage_helper.c:16:30: warning: symbol 'mock_obj_props' was not declared. Should it be static?
drivers/gpu/drm/selftests/test-drm_damage_helper.c:17:18: warning: symbol 'mock_plane' was not declared. Should it be static?
drivers/gpu/drm/selftests/test-drm_damage_helper.c:18:21: warning: symbol 'mock_prop' was not declared. Should it be static?

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: kernel test robot <lkp@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Fixes: c7fcbf251397 ("drm/plane: check that fb_damage is set up when used")
Cc: José Roberto de Souza <jose.souza@intel.com> (v1)
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Cc: José Roberto de Souza <jose.souza@intel.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20210730095251.4343-1-daniel.vetter@ffwll.ch
Link: https://patchwork.freedesktop.org/patch/msgid/20210730141948.GA11955@243d74413310

drm: Fix typo in comments

fix typo for drm

v1->v2:
respin with the change "iff ==> implies that"

Signed-off-by: Cai Huoqing <caihuoqing@baidu.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210730132729.376-1-caihuoqing@baidu.com

drm/connector: add ref to drm_connector_get in iter docs

Mention that connectors need to be referenced manually if they are
to be accessed after the iteration has progressed or ended.

Signed-off-by: Simon Ser <contact@emersion.fr>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/KRoUI7OC9lRIvk3YzdGm6tcMVAVlG1fR78Ll7kTZZT4@cp3-web-051.plabs.ch

DRM: ast: Fixed coding style issues of ast_mode.c

Removed space before comma, fixed if statements by putting trailing
statements on new line, fixed unsigned int declaration, and removed
not needed else statement after return.

Signed-off-by: Gregory Williams <gregwills85@gmail.com>
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20210731005328.GA19016@devbox

drm/panel: Add support for E Ink VB3300-KCA

Add support for the 10.3" E Ink panel described at:
https://www.eink.com/product.html?type=productdetail&id=7

Signed-off-by: Alistair Francis <alistair@alistair23.me>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210801004701.831-1-alistair@alistair23.me

drm/pl111: Remove unused including <linux/version.h>

Remove including <linux/version.h> that don't need it.

Signed-off-by: Cai Huoqing <caihuoqing@baidu.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210727052107.659-1-caihuoqing@baidu.com

drm/panel: atna33xc20: Introduce the Samsung ATNA33XC20 panel

The Samsung ATNA33XC20 panel is an AMOLED eDP panel that has backlight
control over the DP AUX channel.

This panel is _almost_ able to be controlled in a "simple" way (and it
originally was implemented in panel-simple.c), but it's really
impossible to get the backlight semantics right there without adding
wacky special-case code to panel-simple. Let's give up and clone the
parts of panel-simple that we need and implement the power sequence
that this panel needs.

NOTE: we'll still leave the devicetree bindings alone. Even though the
power-sequencing is non-standard the bindings are still "simple".

Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210730084534.v2.6.I3a2900080f8749d2bb4baf49ca902db4b0e1df7d@changeid

Revert "drm/panel-simple: Support for delays between GPIO & regulator"

This reverts commit 18a1488bf1e13fc3fc96d7948466b2166067c6c8.

Those delays were added to support the Samsung ATNA33XC20
panel. However, we've moving that to its own panel driver and out of
panel-simple. That means we don't need the ability to specify this
delay.

NOTE: it's unlikely we want to keep this delay "just in case" some
other panel needs it. The enable-gpio and the power supply are really
supposed to be different ways to specify the same thing: the main
enable of the panel. Supporting a delay between them doesn't really
make sense.

Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210730084534.v2.5.Ie44e3e5b7a926392541d575ca84c56931596513f@changeid

Revert "drm/panel-simple: Add Samsung ATNA33XC20"

This reverts commit 4bfe6c8f7c23b01719671b69fd29b87a35ccd9d6.

This panel's power sequencing really can't be handled properly by
panel-simple because of the special sequencing needed for the EL_ON3
GPIO. The only way it was sorta working in the past was by trying to
jam that signal into the "enable-gpio", but that really wasn't a good
fit. We'll add a custom panel driver for this panel to do it right.

Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210730084534.v2.4.Id9f076ec5f35633f8ce931051af268a04c45c075@changeid

drm/bridge: ti-sn65dsi86: Add some 100 us delays

The manual has always said that we need 100 us delays in a few
places. Though it hasn't seemed to be a big deal to skip these, let's
add them in case it makes something happier.

NOTE: this fixes no known issues but it seems good to make it right.

Fixes: a095f15c00e2 ("drm/bridge: add support for sn65dsi86 bridge driver")
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Acked-by: Robert Foss <robert.foss@linaro.org>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210730084534.v2.3.I842d483139531aa4651da8338512fdf0171ff23c@changeid

drm/bridge: ti-sn65dsi86: Fix power off sequence

When testing with a panel that's apparently a little more persnickety
about the correct power sequence (specifically Samsung ATNA33XC20), we
found that the ti-sn65dsi86 was doing things just slightly wrong.

Looking closely at the ti-sn65dsi86's datasheet, the power off
sequence is supposed to be:
1. Clear VSTREAM_ENABLE bit
2. Stop DSI stream from GPU. DSI lanes must be placed in LP11 state.
3. Program the ML_TX_MODE to 0x0 (OFF)
4. Program the DP_NUM_LANES register to 0x0
5. Clear the DP_PLL_EN bit.
6. Deassert the EN pin.
7. Remove power from supply pins

Since we were doing the whole sequence in the "disable", I believe
that step #2 (stopping the DSI stream from the GPU) wasn't
happening. We also weren't setting DP_NUM_LANES to 0.

Let's fix this.

NOTE: things are a little asymmetric now. For instance, we turn the
PLL on in "enable" but now we're not turning it off until
"post_disable". It would seem to make sense to move the PLL turning on
to "pre_enable" to match. Unfortunately, I don't believe that's
allowed. It looks as if (in the non-refclk mode which probably nobody
is using) we have to wait until the MIPI clock is there before we can
enable the PLL. In any case, the way it is here won't really
hurt--it'll just leave the PLL on a little longer.

Fixes: a095f15c00e2 ("drm/bridge: add support for sn65dsi86 bridge driver")
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Acked-by: Robert Foss <robert.foss@linaro.org>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210730084534.v2.2.If8a8ec3bf1855cf0dbb62c005a71d6698c99c125@changeid

drm/dp: Don't zero PWMGEN_BIT_COUNT when driver_pwm_freq_hz not specified

The function drm_edp_backlight_init() is defined such that the
"driver_pwm_freq_hz" parameter is optional--it's 0 if you don't want
to futz with it. If you follow this variable through, you'll find out
that if it's 0 we won't ever set the "bl->pwmgen_bit_count", leaving
it as 0.

That means that before using it in drm_edp_backlight_enable() we need
to check to see if it's non-zero.

Programming this field to zero was confusing the panel I tested with
(Samsung ATNA33XC20). The backlight still worked somewhat but the
brightness values didn't correspond to what they should have been.

Fixes: 867cf9cd73c3 ("drm/dp: Extract i915's eDP backlight code into DRM helpers")
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210730084534.v2.1.If017efce7116ae8ba015ed7def840c390a0e0c77@changeid

drm: clean up unused kerneldoc in drm_lease.c

The kerneldoc in drm_lease.c is unused because none of the functions
are driver interfaces as the symbols are not exported.

Since they aren't used and much of the existing comments don't provide
any insights (e.g. they just repeat the function name or list out the
function parameters), they should be removed to make them easier to
maintain and to make useful info more obvious.

As a note, many of the comments mention whether idr_mutex should be
held, but these are mostly redundant in cases where the function
contains lockdep assertions or grabs the mutex.

To simplify review, here's the reasoning behind each update.

drm_lease_owner:
function name is self-descriptive

_drm_find_lessee:
function name is self-descriptive

_drm_lease_held_master:
function name and signature are self-descriptive

_drm_has_leased:
kerneldoc is summarized into a comment because the function name could
be interpreted ambiguously (check if the object has been leased VS
check if the master has a lease on the object)

_drm_lease_held:
Retain the idr_mutex comment because the function does not directly
grab the mutex or use a lockdep assertion.
Otherwise, the function name is self-descriptive.

drm_lease_held:
function name is self-descriptive

drm_lease_filter_crtcs:
Kerneldoc is summarized into a comment because the function name could
be interpreted ambiguously (filter leases based on crtcs mask VS
filter crtcs mask based on leases)

drm_lease_create:
Kerneldoc removed.
Useful function details such as atomic leasing are retained.
Errno interpretations are useful and retained.

drm_lease_destroy:
function name is self-descriptive. Additional information is also
removed as they're already present as comments inside the function.

_drm_lease_revoke:
function name is self-descriptive

drm_lease_revoke:
function name is self-descriptive

drm_mode_create_lease_ioctl:
Kerneldoc removed, but useful function details retained.

drm_mode_list_lessees_ioctl:
function name is self-descriptive. Additional details restate what the
code does.

drm_mode_get_lease_ioctl:
Function summary retained to clarify that it's the leased objects that
are returned, not the lease structure.

drm_mode_revoke_lease_ioctl:
Kerneldoc removed, but useful function details retained.

Signed-off-by: Desmond Cheong Zhi Xi <desmondcheongzx@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210730051759.1570630-1-desmondcheongzx@gmail.com

Merge tag 'amd-drm-next-5.15-2021-07-29' of https://gitlab.freedesktop.org/agd5f/linux into drm-next

amd-drm-next-5.15-2021-07-29:

amdgpu:
- VCN/JPEG power down sequencing fixes
- Various navi pcie link handling fixes
- Clockgating fixes
- Yellow Carp fixes
- Beige Goby fixes
- Misc code cleanups
- S0ix fixes
- SMU i2c bus rework
- EEPROM handling rework
- PSP ucode handling cleanup
- SMU error handling rework
- AMD HDMI freesync fixes
- USB PD firmware update rework
- MMIO based vram access rework
- Misc display fixes
- Backlight fixes
- Add initial Cyan Skillfish support
- Overclocking fixes suspend/resume

amdkfd:
- Sysfs leak fix
- Add counters for vm faults and migration
- GPUVM TLB optimizations

radeon:
- Misc fixes

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210730033455.3852-1-alexander.deucher@amd.com

Merge tag 'drm-msm-next-2021-07-28' of https://gitlab.freedesktop.org/drm/msm into drm-next

An early pull for v5.15 (there'll be more coming in a week or two),
consisting of the drm/scheduler conversion and a couple other small
series that one was based one. Mostly sending this now because IIUC
danvet wanted it in drm-next so he could rebase on it. (Daniel, if
you disagree then speak up, and I'll instead include this in the main
pull request once that is ready.)

This also has a core patch to drop drm_gem_object_put_locked() now
that the last use of it is removed.

[airlied: add NULL to drm_sched_init]

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Rob Clark <robdclark@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/CAF6AEGumRk7H88bqV=H9Fb1SM0zPBo5B7NsCU3jFFKBYxf5k+Q@mail.gmail.com

Merge tag 'drm-misc-next-2021-07-29' of git://anongit.freedesktop.org/drm/drm-misc into drm-next

drm-misc-next for v5.15:

UAPI Changes:
- Add modifiers for arm fixed rate compression.

Cross-subsystem Changes:
- Assorted dt binding fixes.
- Convert ssd1307fb to json-schema.
- Update a lot of irc channels to point to OFTC, as everyone moved there.
- Fix the same divide by zero for asilantfb, kyro, rivafb.

Core Changes:
- Document requirements for new atomic properties.
- Add drm_gem_fb_(begin/end)_cpu_access helpers, and use them in some drivers.
- Document drm_property_enum.value for bitfields.
- Add explicit _NO_ for MIPI_DSI flags that disable features.
- Assorted documentation fixes.
- Update fb_damage handling, and move drm_plane_enable_fb_damage_clips to core.
- Add logging and docs to RMFB ioctl.
- Assorted small fixes to dp_mst, master handling.
- Clarify drm lease usage.

Driver Changes:
- Assorted small fixes to panfrost, hibmc, bridge/nwl-dsi, rockchip, vc4.
- More drm -> linux irq conversions.
- Add support for some Logic Technologies and Multi-Inno panels.
- Expose phy-functionality for drm/rockchip, to allow controlling from the media subsystem.
- Add support for 2 AUO panels.
- Add damage handling to ssd1307fb.
- Improve FIFO handling on mxsfb.
- Assorted small fixes to vmwgfx, and bump version to 2.19 for the new ioctls.
- Improve sony acx424akp backlight handling.

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/a753221a-e23e-0dc4-7ca6-8c1b179738d0@linux.intel.com

Merge tag 'du-next-20210728' of git://linuxtv.org/pinchartl/media into drm-next

- R-Car DU shutdown fixes
- R-Car DU conversion to bridge connector helper
- Misc small fixes

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Link: https://patchwork.freedesktop.org/patch/msgid/YQGHjOSOw2G4+A3x@pendragon.ideasonboard.com

drm/vc4: hdmi: Remove unused struct

Commit 91e99e113929 ("drm/vc4: hdmi: Register HDMI codec") removed the
references to the vc4_hdmi_audio_component_drv structure, but not the
structure itself resulting in a warning. Remove it.

Fixes: 91e99e113929 ("drm/vc4: hdmi: Register HDMI codec")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Reviewed-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210707093632.1468127-2-maxime@cerno.tech

drm/vc4: hdmi: Remove redundant variables

The vc4_hdmi_audio_prepare function and the functions it's calling have
in several occurences multiple dereferences of either the sample rate or
the number of channels.

It turns out that these variables are also passed through the hdmi codec
parameters structure. Convert all the users to use this structure, and
if it's used multiple times use a variable to store it instead of
dereferencing it every time.

Reviewed-by: Nicolas Saenz Julienne <nsaenz@kernel.org>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20210707093632.1468127-1-maxime@cerno.tech

drm: clarify usage of drm leases

We make the following changes to the documentation of drm leases to
make it easier to reason about their usage. In particular, we clarify
the lifetime and locking rules of lease fields in drm_master:

1. Make it clear that &drm_device.mode_config.idr_mutex protects the
lease idr and list structures for drm_master. The lessor field itself
doesn't need to be protected as it doesn't change after it's set in
drm_lease_create.

2. Add descriptions for the lifetime of lessors and leases.

3. Add an overview DOC: section in drm-uapi.rst that defines the
terminology for drm leasing, and explains how leases work and why
they're used.

Signed-off-by: Desmond Cheong Zhi Xi <desmondcheongzx@gmail.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210728102739.441543-1-desmondcheongzx@gmail.com

drm/amd/pm: Fix a bug in semaphore double-lock

Fix a bug in smu_cmn_send_msg_without_waiting() in
that this function does not need to take the
smu->message_lock mutex in order to send a message
down to the SMU. The mutex is acquired by the
caller of this function instead.

Cc: Alex Deucher <Alexander.Deucher@amd.com>
Cc: Changfeng Zhu <Changfeng.Zhu@amd.com>
Cc: Huang Rui <ray.huang@amd.com>
Fixes: 5810323ba69289 ("drm/amd/pm: Fix a bug communicating with the SMU (v5)")
Signed-off-by: Luben Tuikov <luben.tuikov@amd.com>
Reviewed-by: Alex Deucher <Alexander.Deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amdgpu: enable psp front door loading by default for cyan_skillfish2

The function is ready on psp firmware, and enable it by default.

Signed-off-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Tao Zhou <tao.zhou1@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amdgpu: adjust fence driver enable sequence

Fence driver was enabled per ring when sw init on per IP block before.
Change to enable all the fence driver at the same time after
amdgpu_device_ip_init finished.
Rename some function related to fence to make it reasonable for read.

Signed-off-by: Likun Gao <Likun.Gao@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amdgpu: Added PSP13 BL loading support for additional drivers

Added BL loading support for soc/intf/dbg drivers

Signed-off-by: John Clements <john.clements@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amdgpu: Consolidated PSP13 BL FW loading

Remove duplicate code

Signed-off-by: John Clements <john.clements@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amdgpu: Added support for added psp driver binaries FW

Detect psp driver binaries packed into FW and try to load the FW

Signed-off-by: John Clements <john.clements@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amdgpu: Added latest PSP FW header

Improved handling for scalling PSP FW binaries

Signed-off-by: John Clements <john.clements@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amdgpu: remove the access of xxx_PSP_DEBUG on cycan_skillfish

It won't need to clear the xxx_PSP_DEBUG registers, because firmware
will handle this change.

Signed-off-by: Huang Rui <ray.huang@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amdgpu/display: add support for multiple backlights

On platforms that support multiple backlights, register
each one separately. This lets us manage them independently
rather than registering a single backlight and applying the
same settings to both.

v2: fix typo:
Reported-by: kernel test robot <lkp@intel.com>
Reviewed-by: Roman Li <Roman.Li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/panel-sony-acx424akp: Modernize backlight handling

This converts the internal backlight in the Sony ACX424AKP
driver to do it the canonical way:

- Assign the panel->backlight during probe.
- Let the panel framework handle the backlight.
- Make the backlight .set_brightness() turn the backlight
off completely if blank.
- Fix some dev_err_probe() use cases along the way.

Tested on the U8500 HREF520 reference design.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210715092808.1100106-1-linus.walleij@linaro.org

drm: use the lookup lock in drm_is_current_master

Inside drm_is_current_master, using the outer drm_device.master_mutex
to protect reads of drm_file.master makes the function prone to creating
lock hierarchy inversions. Instead, we can use the
drm_file.master_lookup_lock that sits at the bottom of the lock
hierarchy.

Reported-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Desmond Cheong Zhi Xi <desmondcheongzx@gmail.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210724111824.59266-2-desmondcheongzx@gmail.com

maintainers: add bugs and chat URLs for amdgpu

Add links to the issue tracker and the IRC channel for the amdgpu
driver.

Signed-off-by: Simon Ser <contact@emersion.fr>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Christian König <christian.koenig@amd.com>
Cc: Pan Xinhui <Xinhui.Pan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amdgpu/display: only enable aux backlight control for OLED panels

We've gotten a number of reports about backlight control not
working on panels which indicate that they use aux backlight
control.  A recent patch:

commit 2d73eabe2984a435737498ab39bb1500a9ffe9a9
Author: Camille Cho <Camille.Cho@amd.com>
Date:   Thu Jul 8 18:28:37 2021 +0800

    drm/amd/display: Only set default brightness for OLED

    [Why]
    We used to unconditionally set backlight path as AUX for panels capable
    of backlight adjustment via DPCD in set default brightness.

    [How]
    This should be limited to OLED panel only since we control backlight via
    PWM path for SDR mode in LCD HDR panel.

Reviewed-by: Krunoslav Kovac <krunoslav.kovac@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Camille Cho <Camille.Cho@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Changes some other code to only use aux for backlight control on
OLED panels.  The commit message seems to indicate that PWM should
be used for SDR mode on HDR panels.  Do something similar for
backlight control in general.  This may need to be revisited if and
when HDR started to get used.

Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1438
Bug: https://bugzilla.kernel.org/show_bug.cgi?id=213715
Reviewed-by: Roman Li <Roman.Li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>