On Sat, Jul 24, 2021 at 06:41:21PM +0100, Christoph Hellwig wrote:
Still tests fine:
Tested-by: Christoph Hellwig
I just pushed this to drm-intel-next as part of another series and
added your Tested-by.
Rodrigo, can you pick this up for -fixes? This should go with your other
patch to fix
The sc8180x has 2 DP and 1 eDP controllers, add support for these to the
DP driver.
Link:
https://lore.kernel.org/linux-arm-msm/20210511042043.592802-5-bjorn.anders...@linaro.org/
Signed-off-by: Bjorn Andersson
---
drivers/gpu/drm/msm/dp/dp_display.c | 12
1 file changed, 12
The sc8180x has 2 DP and 1 eDP controllers, add support for these to the
DP driver.
Link:
https://lore.kernel.org/linux-arm-msm/20210511042043.592802-5-bjorn.anders...@linaro.org/
Signed-off-by: Bjorn Andersson
---
drivers/gpu/drm/msm/dp/dp_display.c | 12
1 file changed, 12
The Qualcomm SC8180x has 2 DP controllers and 1 eDP controller, add
compatibles for these to the msm/dp binding.
Signed-off-by: Bjorn Andersson
---
.../devicetree/bindings/display/msm/dp-controller.yaml | 2 ++
1 file changed, 2 insertions(+)
diff --git
As the Qualcomm DisplayPort driver only supports a single instance of
the driver the commonly used struct dp_display is kept in a global
variable. As we introduce additional instances this obviously doesn't
work.
Replace this with a combination of existing references to adjacent
objects and
Based on the removal of the g_dp_display and the movement of the
priv->dp lookup into the DP code it's now possible to have multiple
DP instances.
In line with the other controllers in the MSM driver, introduce a
per-compatible list of base addresses which is used to resolve the
"instance id" for
Functions in the DisplayPort code that relates to individual instances
(encoders) are passed both the struct msm_dp and the struct drm_encoder. But
in a situation where multiple DP instances would exist this means that
the caller need to resolve which struct msm_dp relates to the struct
The current implementation supports a single DP instance and the DPU code will
only match it against INTF_DP instance 0. These patches extends this to allow
multiple DP instances and support for matching against DP instances beyond 0.
This is based on v4 of Dmitry's work on multiple DSI
On Sat 17 Jul 07:40 CDT 2021, Dmitry Baryshkov wrote:
> set_encoder_mode callback is completely unused now. Drop it from
> msm_kms_func().
>
> Signed-off-by: Dmitry Baryshkov
> Reviewed-by: Abhinav Kumar
Reviewed-by: Bjorn Andersson
Regards,
Bjorn
> ---
> drivers/gpu/drm/msm/msm_kms.h | 3
On Sat 17 Jul 07:40 CDT 2021, Dmitry Baryshkov wrote:
> None of the display drivers now implement set_encoder_mode callback.
> Stop calling it from the modeset init code.
>
> Signed-off-by: Dmitry Baryshkov
> Reviewed-by: Abhinav Kumar
Reviewed-by: Bjorn Andersson
Regards,
Bjorn
> ---
>
On Sat 17 Jul 07:40 CDT 2021, Dmitry Baryshkov wrote:
> None of the display drivers now implement set_encoder_mode callback.
> Stop calling it from the modeset init code.
>
> Signed-off-by: Dmitry Baryshkov
> Reviewed-by: Abhinav Kumar
Reviewed-by: Bjorn Andersson
Regards,
Bjorn
> ---
>
On Sat 17 Jul 07:40 CDT 2021, Dmitry Baryshkov wrote:
> Move a call to mdp5_encoder_set_intf_mode() after
> msm_dsi_modeset_init(), removing set_encoder_mode callback.
>
> Signed-off-by: Dmitry Baryshkov
> Reviewed-by: Abhinav Kumar
Reviewed-by: Bjorn Andersson
Regards,
Bjorn
> ---
>
On Sat 17 Jul 07:40 CDT 2021, Dmitry Baryshkov wrote:
> Move setting up encoders from set_encoder_mode to
> _dpu_kms_initialize_dsi() / _dpu_kms_initialize_displayport(). This
> allows us to support not only "single DSI" and "bonded DSI" but also "two
> independent DSI" configurations. In future
On Sat 17 Jul 07:40 CDT 2021, Dmitry Baryshkov wrote:
> Add three helper functions to be used by display drivers for setting up
> encoders.
>
> Signed-off-by: Dmitry Baryshkov
> Reviewed-by: Abhinav Kumar
> ---
> drivers/gpu/drm/msm/dsi/dsi.c | 7 +++
>
, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]
url:
https://github.com/0day-ci/linux/commits/Daniel-Vetter/drm-i915-Check-for-nomodeset-in-i915_init-first/20210724-033145
base: git://anongit.freedesktop.org
drivers/gpu/drm/i915/i915_vma.c:41:19: warning: symbol 'slab_vmas' was not
declared. Should it be static?
Reported-by: kernel test robot
Signed-off-by: kernel test robot
---
i915_vma.c |2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/i915_vma.c
This patch adds a Adreno 680 entry to the gpulist.
Signed-off-by: Bjorn Andersson
---
drivers/gpu/drm/msm/adreno/a6xx_gmu.c | 5 +++--
drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 12 +++-
drivers/gpu/drm/msm/adreno/a6xx_hfi.c | 2 +-
Hi Vinay,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on drm-tip/drm-tip]
[cannot apply to drm-intel/for-linux-next drm-exynos/exynos-drm-next
tegra-drm/drm/tegra/for-next drm/drm-next v5.14-rc2 next-20210723]
[If your patch is applied to the wrong git tree,
The userspace program could pass any values to the driver through
ioctl() interface. If the driver doesn't check the value of 'pixclock',
it may cause divide error.
Fix this by checking whether 'pixclock' is zero first.
The following log reveals it:
[ 43.861711] divide error: [#1]
The userspace program could pass any values to the driver through
ioctl() interface. If the driver doesn't check the value of 'pixclock',
it may cause divide error.
Fix this by checking whether 'pixclock' is zero first.
The following log reveals it:
[ 33.396850] divide error: [#1]
The userspace program could pass any values to the driver through
ioctl() interface. If the driver doesn't check the value of 'pixclock',
it may cause divide error because the value of 'lineclock' and
'frameclock' will be zero.
Fix this by checking whether 'pixclock' is zero in
Zheyu Ma (3):
video: fbdev: kyro: add a check against divide error
video: fbdev: riva: add a check against divide error
video: fbdev: asiliantfb: add a check against divide error
drivers/video/fbdev/asiliantfb.c | 3 +++
drivers/video/fbdev/kyro/fbdev.c | 3 +++
Hi, Nancy:
Nancy.Lin 於 2021年7月22日 週四 下午5:46寫道：
>
> Add pseudo ovl module files:
My English is not good. The word 'pseudo' seems like 'looks like but
indeed not the same'.
I think the 'real' ovl also has rdma and mixer inside it, so I prefer
to treat these two ovl as different kind of ovl, not
, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]
url:
https://github.com/0day-ci/linux/commits/Daniel-Vetter/drm-i915-Check-for-nomodeset-in-i915_init-first/20210724-033145
base: git://anongit.freedesktop.org
drivers/gpu/drm/i915/i915_scheduler.c:13:19: warning: symbol
'slab_dependencies' was not declared. Should it be static?
drivers/gpu/drm/i915/i915_scheduler.c:14:19: warning: symbol 'slab_priorities'
was not declared. Should it be static?
Reported-by: kernel test robot
Signed-off-by: kernel
Hi, Yongqiang:
Yongqiang Niu 於 2021年7月16日 週五 下午2:32寫道：
>
> This patch add mt8183 private data
Applied to mediatek-drm-next [1], thanks.
[1]
https://git.kernel.org/pub/scm/linux/kernel/git/chunkuang.hu/linux.git/log/?h=mediatek-drm-next
Regards,
Chun-Kuang.
>
> Signed-off-by: Yongqiang Niu
Hi, Yongqiang:
Yongqiang Niu 於 2021年7月16日 週五 下午2:32寫道：
>
> mt8183 aal has no gamma function
Applied to mediatek-drm-next [1], thanks.
[1]
https://git.kernel.org/pub/scm/linux/kernel/git/chunkuang.hu/linux.git/log/?h=mediatek-drm-next
Regards,
Chun-Kuang.
>
> Signed-off-by: Yongqiang Niu
>
On Fri, Jul 23, 2021 at 05:47:45PM -0700, Daniele Ceraolo Spurio wrote:
>
>
> On 7/22/2021 4:53 PM, Matthew Brost wrote:
> > Implement GuC virtual engines. Rather simple implementation, basically
> > just allocate an engine, setup context enter / exit function to virtual
> > engine specific
, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]
url:
https://github.com/0day-ci/linux/commits/Daniel-Vetter/drm-i915-Check-for-nomodeset-in-i915_init-first/20210724-033145
base: git://anongit.freedesktop.org
drivers/gpu/drm/i915/i915_request.c:54:19: warning: symbol 'slab_requests' was
not declared. Should it be static?
drivers/gpu/drm/i915/i915_request.c:55:19: warning: symbol 'slab_execute_cbs'
was not declared. Should it be static?
Reported-by: kernel test robot
Signed-off-by: kernel test robot
From: Tom Rix
A build error when DRM_NOUVEAU_BACKLIGHT is not defined
disp.c:1665:52: error: 'struct nouveau_connector' has no
member named 'backlight'
Use ifdef's similar to elsewhere in disp.c to conditionally
use the new backlight support.
Move scope of drm to where it is used, inside the
On Sat, Jul 24, 2021 at 7:05 PM Len Baker wrote:
>
> strcpy() performs no bounds checking on the destination buffer. This
> could result in linear overflows beyond the end of the buffer, leading
> to all kinds of misbehaviors. The safe replacement is strscpy() but in
> this case it is simpler to
drivers/gpu/drm/i915/gem/i915_gem_object.c:36:19: warning: symbol
'slab_objects' was not declared. Should it be static?
Reported-by: kernel test robot
Signed-off-by: kernel test robot
---
i915_gem_object.c |2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git
On Fri, Jul 23, 2021 at 05:10:45PM -0700, Lucas De Marchi wrote:
> We were using GRAPHICS_VER() to handle SKL_DFSM register, which means we
> were not handling GLK correctly since that has GRAPHICS_VER == 9, but
> DISPLAY_VER == 10. Switch the entire branch to check DISPLAY_VER
> which makes it
On Fri, Jul 23, 2021 at 05:10:50PM -0700, Lucas De Marchi wrote:
> The only real platform with DISPLAY_VER == 10 is GLK, that doesn't have
> combo phys. We don't need to handle CNL explicitly in
> intel_combo_phy.c.
>
> Remove code and rename functions/macros accordingly to use ICL prefix.
>
>
, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]
url:
https://github.com/0day-ci/linux/commits/Daniel-Vetter/drm-i915-Check-for-nomodeset-in-i915_init-first/20210724-033145
base: git://anongit.freedesktop.org
On Fri, Jul 23, 2021 at 05:10:51PM -0700, Lucas De Marchi wrote:
> No need for special CNL handling as there is no real platform with that
> configuration.
>
> Signed-off-by: Lucas De Marchi
Reviewed-by: Matt Roper
> ---
> drivers/gpu/drm/i915/display/intel_crtc.c | 2 +-
> 1 file changed, 1
On Fri, Jul 23, 2021 at 05:10:49PM -0700, Lucas De Marchi wrote:
> The only real platform with DISPLAY_VER == 10 is GLK, so we don't need
> any checks and supporting code for CNL. For DISPLAY_VER >= 11,
> ilk_load_csc_matrix() is not used, so make it handle GLK only.
>
> Signed-off-by: Lucas De
On Fri, Jul 23, 2021 at 05:10:48PM -0700, Lucas De Marchi wrote:
> The only real platform with DISPLAY_VER == 10 is GLK, so we don't need
> any checks and supporting code for CNL. Remove code and rename
> functions/macros accordingly.
>
> Signed-off-by: Lucas De Marchi
> ---
>
()
On Fri, Jul 23, 2021 at 3:38 AM Akhil P Oommen wrote:
>
> This patch adds support for the gpu found in the Snapdragon 7c Gen 3
> compute platform. This gpu is similar to the exisiting a660 gpu with
> minor delta in the programing sequence. As the Adreno GPUs are moving
> away from a numeric
On Fri, Jul 23, 2021 at 05:10:47PM -0700, Lucas De Marchi wrote:
> Explicit support for CNL is being removed from the driver as it's not
> expected to work. Remove the workaround for PORT_F from
> display/intel_bios.c so we can also remove the generic DISPLAY_VER == 10
> calls to intel_ddi_init():
Hi Len,
On Sat, Jul 24, 2021 at 7:44 PM Len Baker wrote:
> Add braces to the "for" loop and remove braces from the "if" statement.
> This way the kernel coding style is followed.
>
> Signed-off-by: Len Baker
Thanks for your patch!
> --- a/drivers/staging/fbtft/fbtft-core.c
> +++
Add braces to the "for" loop and remove braces from the "if" statement.
This way the kernel coding style is followed.
Signed-off-by: Len Baker
---
drivers/staging/fbtft/fbtft-core.c | 11 ++-
1 file changed, 6 insertions(+), 5 deletions(-)
diff --git
Add the necessary dt nodes for gpu support in sc7280.
Signed-off-by: Akhil P Oommen
---
This patch has dependency on the GPUCC bindings patch here:
https://patchwork.kernel.org/project/linux-arm-msm/patch/1619519590-3019-4-git-send-email-t...@codeaurora.org/
Changes in v2:
- formatting update
>On 12.07.21 19:16, Frank Wunderlich wrote:
>> Hi,
>>
>> it turns out that problem is the read+or of the new value
>>
>> i reverted my patch and changed
>>
>> reg = readl_relaxed(mmsys->regs + routes[i].addr) | routes[i].val;
>> writel_relaxed(reg, mmsys->regs + routes[i].addr);
>>
>> to
>>
Remove the initialization of the variable "i" since it is written a few
lines later.
Signed-off-by: Len Baker
---
drivers/staging/fbtft/fbtft-core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/staging/fbtft/fbtft-core.c
b/drivers/staging/fbtft/fbtft-core.c
index
Hi Vinay,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on drm-tip/drm-tip]
[cannot apply to drm-intel/for-linux-next drm-exynos/exynos-drm-next
tegra-drm/drm/tegra/for-next drm/drm-next v5.14-rc2 next-20210723]
[If your patch is applied to the wrong git tree,
Hello, thanks, Paul. I've sent V2.
On 22/07/2021 17.12, Paul Cercueil wrote:
Hi Artjom,
Le jeu., juil. 22 2021 at 17:04:32 +0300, Artjom Vejsel
a écrit :
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.
strcpy() performs no bounds checking on the destination buffer. This
could result in linear overflows beyond the end of the buffer, leading
to all kinds of misbehaviors. The safe replacement is strscpy() but in
this case it is simpler to use the "%*ph" format specifier.
Signed-off-by: Len Baker
strcpy() performs no bounds checking on the destination buffer. This
could result in linear overflows beyond the end of the buffer, leading
to all kinds of misbehaviors. So, this serie removes all strcpy uses
from the "staging/fbtft" subsystem.
Also, refactor the code a bit to follow the kernel
On Sat, Jul 24, 2021 at 4:14 PM Karol Herbst wrote:
>
> we use the MXM_WMI in code. We also have to keep arm in mind and not
> break stuff there. So I will try to play around with your changes and
> see how that goes.
Ok, should find any randconfig build failures for arm, arm64 or x86 over the
, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]
url:
https://github.com/0day-ci/linux/commits/Daniel-Vetter/drm-i915-Check-for-nomodeset-in-i915_init-first/20210724-033145
base: git://anongit.freedesktop.org
drivers/gpu/drm/i915/gem/i915_gem_context.c:87:19: warning: symbol 'slab_luts'
was not declared. Should it be static?
Reported-by: kernel test robot
Signed-off-by: kernel test robot
---
i915_gem_context.c |2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git
On Sat, Jul 24, 2021 at 4:05 PM Arnd Bergmann wrote:
>
> On Sat, Jul 24, 2021 at 2:52 PM Karol Herbst wrote:
> >
> > On Sat, Jul 24, 2021 at 2:10 PM Karol Herbst wrote:
> > >
> > > On Sat, Jul 24, 2021 at 1:56 PM Arnd Bergmann wrote:
> > > >
> > > > On Sat, Jul 24, 2021 at 11:55 AM Karol
On Sat, Jul 24, 2021 at 2:52 PM Karol Herbst wrote:
>
> On Sat, Jul 24, 2021 at 2:10 PM Karol Herbst wrote:
> >
> > On Sat, Jul 24, 2021 at 1:56 PM Arnd Bergmann wrote:
> > >
> > > On Sat, Jul 24, 2021 at 11:55 AM Karol Herbst wrote:
> > >
> > > - You run into dependency loops that prevent a
On Sat, Jul 24, 2021 at 2:10 PM Karol Herbst wrote:
>
> On Sat, Jul 24, 2021 at 1:56 PM Arnd Bergmann wrote:
> >
> > On Sat, Jul 24, 2021 at 11:55 AM Karol Herbst wrote:
> > >
> > > On Sat, Jul 24, 2021 at 8:55 AM Arnd Bergmann wrote:
> > > >
> > > > On Sat, Jul 24, 2021 at 12:47 AM Karol
On Sat, Jul 24, 2021 at 1:56 PM Arnd Bergmann wrote:
>
> On Sat, Jul 24, 2021 at 11:55 AM Karol Herbst wrote:
> >
> > On Sat, Jul 24, 2021 at 8:55 AM Arnd Bergmann wrote:
> > >
> > > On Sat, Jul 24, 2021 at 12:47 AM Karol Herbst wrote:
> > > >
> > > > In the past this only led to compilation
On Sat, Jul 24, 2021 at 11:55 AM Karol Herbst wrote:
>
> On Sat, Jul 24, 2021 at 8:55 AM Arnd Bergmann wrote:
> >
> > On Sat, Jul 24, 2021 at 12:47 AM Karol Herbst wrote:
> > >
> > > In the past this only led to compilation issues. Also the small amount of
> > > extra .text shouldn't really
, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]
url:
https://github.com/0day-ci/linux/commits/Daniel-Vetter/drm-i915-Check-for-nomodeset-in-i915_init-first/20210724-033145
base: git://anongit.freedesktop.org
drivers/gpu/drm/i915/gt/intel_context.c:17:19: warning: symbol 'slab_ce' was
not declared. Should it be static?
Reported-by: kernel test robot
Signed-off-by: kernel test robot
---
intel_context.c |2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git
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
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 _device.mode_config.idr_mutex protects the
lease idr and list structures
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
Hi,
Just a note that only patch 2 changed from v1 to v2 of this series.
This series contains some improvements that Daniel Vetter proposed following a
discussion on a recent series:
https://lore.kernel.org/lkml/20210712043508.11584-1-desmondcheon...@gmail.com/
While preparing these patches, I
On Mon, Jul 19, 2021 at 09:53:29AM +0200, Geert Uytterhoeven wrote:
> On Sun, Jul 18, 2021 at 9:43 PM Andy Shevchenko
> wrote:
> > On Sun, Jul 18, 2021 at 4:43 PM Len Baker wrote:
> > > strcpy() performs no bounds checking on the destination buffer. This
> > > could result in linear overflows
Hi,
On Sun, Jul 18, 2021 at 10:42:42PM +0300, Andy Shevchenko wrote:
> On Sun, Jul 18, 2021 at 4:43 PM Len Baker wrote:
> >
> > strcpy() performs no bounds checking on the destination buffer. This
> > could result in linear overflows beyond the end of the buffer, leading
> > to all kinds of
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 handhelds.
lot name at AliExpress: 4.3 inch 40PIN TFT LCD Screen COG NV3047 Drive IC
480(RGB)*272 No Touch
Add DT bindings for QiShenglong Gopher 2b 4.3" 480(RGB)x272 TFT LCD panel.
Signed-off-by: Artjom Vejsel
---
.../devicetree/bindings/display/panel/panel-simple.yaml | 2 ++
1 file changed, 2 insertions(+)
diff --git a/Documentation/devicetree/bindings/display/panel/panel-simple.yaml
Add vendor prefix for Shenzhen QiShenglong Industrialist Co., Ltd.
QiShenglong is a Chinese manufacturer of handheld gaming consoles, most of
which run (very old) versions of Linux.
QiShenglong is known as Hamy.
Signed-off-by: Artjom Vejsel
---
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 handhelds.
lot name at AliExpress: 4.3 inch 40PIN TFT LCD Screen COG
NV3047 Drive IC 480(RGB)*272 No Touch
On Sat, Jul 24, 2021 at 8:55 AM Arnd Bergmann wrote:
>
> On Sat, Jul 24, 2021 at 12:47 AM Karol Herbst wrote:
> >
> > In the past this only led to compilation issues. Also the small amount of
> > extra .text shouldn't really matter compared to the entire nouveau driver
> > anyway.
> >
>
> >
Hi, Bjorn,
On Sat, Jul 24, 2021 at 8:10 AM Bjorn Helgaas wrote:
>
> On Fri, Jul 23, 2021 at 05:53:36PM +0800, Huacai Chen wrote:
> > Hi, Bjorn,
> >
> > On Fri, Jul 23, 2021 at 5:29 AM Bjorn Helgaas wrote:
> > >
> > > From: Bjorn Helgaas
> > >
> > > This is a little bit of rework and extension
drivers/gpu/drm/i915/i915_buddy.c:13:19: warning: symbol 'slab_blocks' was not
declared. Should it be static?
Reported-by: kernel test robot
Signed-off-by: kernel test robot
---
i915_buddy.c |2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git
, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]
url:
https://github.com/0day-ci/linux/commits/Daniel-Vetter/drm-i915-Check-for-nomodeset-in-i915_init-first/20210724-033145
base: git://anongit.freedesktop.org
On Sat, Jul 24, 2021 at 12:47 AM Karol Herbst wrote:
>
> In the past this only led to compilation issues. Also the small amount of
> extra .text shouldn't really matter compared to the entire nouveau driver
> anyway.
>
> select DRM_TTM_HELPER
> - select BACKLIGHT_CLASS_DEVICE if
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