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* [PATCH] drm/amd/display: Enable building new display engine with KCOV enabled
@ 2022-07-12 22:42 ` Guenter Roeck
  0 siblings, 0 replies; 7+ messages in thread
From: Guenter Roeck @ 2022-07-12 22:42 UTC (permalink / raw)
  To: Harry Wentland
  Cc: Alex Deucher, amd-gfx, dri-devel, linux-kernel, Guenter Roeck,
	Arnd Bergmann, Leo Li

The new display engine uses floating point math, which is not supported
by KCOV. Commit 9d1d02ff3678 ("drm/amd/display: Don't build DCN1 when kcov
is enabled") tried to work around the problem by disabling
CONFIG_DRM_AMD_DC_DCN if KCOV_INSTRUMENT_ALL and KCOV_ENABLE_COMPARISONS
are enabled. The result is that KCOV can not be enabled on systems which
require this display engine. A much simpler and less invasive solution is
to disable KCOV selectively when compiling the display enagine while
keeping it enabled for the rest of the kernel.

Fixes: 9d1d02ff3678 ("drm/amd/display: Don't build DCN1 when kcov is enabled")
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---
 drivers/gpu/drm/amd/display/Kconfig     | 2 +-
 drivers/gpu/drm/amd/display/dc/Makefile | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/Kconfig b/drivers/gpu/drm/amd/display/Kconfig
index b4029c0d5d8c..96cbc87f7b6b 100644
--- a/drivers/gpu/drm/amd/display/Kconfig
+++ b/drivers/gpu/drm/amd/display/Kconfig
@@ -6,7 +6,7 @@ config DRM_AMD_DC
 	bool "AMD DC - Enable new display engine"
 	default y
 	select SND_HDA_COMPONENT if SND_HDA_CORE
-	select DRM_AMD_DC_DCN if (X86 || PPC64) && !(KCOV_INSTRUMENT_ALL && KCOV_ENABLE_COMPARISONS)
+	select DRM_AMD_DC_DCN if (X86 || PPC64)
 	help
 	  Choose this option if you want to use the new display engine
 	  support for AMDGPU. This adds required support for Vega and
diff --git a/drivers/gpu/drm/amd/display/dc/Makefile b/drivers/gpu/drm/amd/display/dc/Makefile
index b4eca0236435..b801973749d2 100644
--- a/drivers/gpu/drm/amd/display/dc/Makefile
+++ b/drivers/gpu/drm/amd/display/dc/Makefile
@@ -26,6 +26,9 @@
 DC_LIBS = basics bios dml clk_mgr dce gpio irq link virtual
 
 ifdef CONFIG_DRM_AMD_DC_DCN
+
+KCOV_INSTRUMENT := n
+
 DC_LIBS += dcn20
 DC_LIBS += dsc
 DC_LIBS += dcn10
-- 
2.35.1


^ permalink raw reply related	[flat|nested] 7+ messages in thread
* [PATCH] drm/amd/display: Enable building new display engine with KCOV enabled
@ 2022-07-12 22:42 ` Guenter Roeck
  0 siblings, 0 replies; 7+ messages in thread
From: Guenter Roeck @ 2022-07-12 22:42 UTC (permalink / raw)
  To: Harry Wentland
  Cc: Arnd Bergmann, Leo Li, linux-kernel, dri-devel, amd-gfx,
	Alex Deucher, Guenter Roeck

The new display engine uses floating point math, which is not supported
by KCOV. Commit 9d1d02ff3678 ("drm/amd/display: Don't build DCN1 when kcov
is enabled") tried to work around the problem by disabling
CONFIG_DRM_AMD_DC_DCN if KCOV_INSTRUMENT_ALL and KCOV_ENABLE_COMPARISONS
are enabled. The result is that KCOV can not be enabled on systems which
require this display engine. A much simpler and less invasive solution is
to disable KCOV selectively when compiling the display enagine while
keeping it enabled for the rest of the kernel.

Fixes: 9d1d02ff3678 ("drm/amd/display: Don't build DCN1 when kcov is enabled")
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---
 drivers/gpu/drm/amd/display/Kconfig     | 2 +-
 drivers/gpu/drm/amd/display/dc/Makefile | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/Kconfig b/drivers/gpu/drm/amd/display/Kconfig
index b4029c0d5d8c..96cbc87f7b6b 100644
--- a/drivers/gpu/drm/amd/display/Kconfig
+++ b/drivers/gpu/drm/amd/display/Kconfig
@@ -6,7 +6,7 @@ config DRM_AMD_DC
 	bool "AMD DC - Enable new display engine"
 	default y
 	select SND_HDA_COMPONENT if SND_HDA_CORE
-	select DRM_AMD_DC_DCN if (X86 || PPC64) && !(KCOV_INSTRUMENT_ALL && KCOV_ENABLE_COMPARISONS)
+	select DRM_AMD_DC_DCN if (X86 || PPC64)
 	help
 	  Choose this option if you want to use the new display engine
 	  support for AMDGPU. This adds required support for Vega and
diff --git a/drivers/gpu/drm/amd/display/dc/Makefile b/drivers/gpu/drm/amd/display/dc/Makefile
index b4eca0236435..b801973749d2 100644
--- a/drivers/gpu/drm/amd/display/dc/Makefile
+++ b/drivers/gpu/drm/amd/display/dc/Makefile
@@ -26,6 +26,9 @@
 DC_LIBS = basics bios dml clk_mgr dce gpio irq link virtual
 
 ifdef CONFIG_DRM_AMD_DC_DCN
+
+KCOV_INSTRUMENT := n
+
 DC_LIBS += dcn20
 DC_LIBS += dsc
 DC_LIBS += dcn10
-- 
2.35.1


^ permalink raw reply related	[flat|nested] 7+ messages in thread
* Re: [PATCH] drm/amd/display: Enable building new display engine with KCOV enabled
  2022-07-12 22:42 ` Guenter Roeck
@ 2022-07-13 20:02   ` Harry Wentland
  -1 siblings, 0 replies; 7+ messages in thread
From: Harry Wentland @ 2022-07-13 20:02 UTC (permalink / raw)
  To: Guenter Roeck
  Cc: Alex Deucher, amd-gfx, dri-devel, linux-kernel, Arnd Bergmann, Leo Li

On 2022-07-12 18:42, Guenter Roeck wrote:
> The new display engine uses floating point math, which is not supported
> by KCOV. Commit 9d1d02ff3678 ("drm/amd/display: Don't build DCN1 when kcov
> is enabled") tried to work around the problem by disabling
> CONFIG_DRM_AMD_DC_DCN if KCOV_INSTRUMENT_ALL and KCOV_ENABLE_COMPARISONS
> are enabled. The result is that KCOV can not be enabled on systems which
> require this display engine. A much simpler and less invasive solution is
> to disable KCOV selectively when compiling the display enagine while
> keeping it enabled for the rest of the kernel.
> 
> Fixes: 9d1d02ff3678 ("drm/amd/display: Don't build DCN1 when kcov is enabled")
> Cc: Arnd Bergmann <arnd@arndb.de>
> Cc: Leo Li <sunpeng.li@amd.com>
> Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Reviewed-by: Harry Wentland <harry.wentland@amd.com>

Harry

> ---
>  drivers/gpu/drm/amd/display/Kconfig     | 2 +-
>  drivers/gpu/drm/amd/display/dc/Makefile | 3 +++
>  2 files changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/amd/display/Kconfig b/drivers/gpu/drm/amd/display/Kconfig
> index b4029c0d5d8c..96cbc87f7b6b 100644
> --- a/drivers/gpu/drm/amd/display/Kconfig
> +++ b/drivers/gpu/drm/amd/display/Kconfig
> @@ -6,7 +6,7 @@ config DRM_AMD_DC
>  	bool "AMD DC - Enable new display engine"
>  	default y
>  	select SND_HDA_COMPONENT if SND_HDA_CORE
> -	select DRM_AMD_DC_DCN if (X86 || PPC64) && !(KCOV_INSTRUMENT_ALL && KCOV_ENABLE_COMPARISONS)
> +	select DRM_AMD_DC_DCN if (X86 || PPC64)
>  	help
>  	  Choose this option if you want to use the new display engine
>  	  support for AMDGPU. This adds required support for Vega and
> diff --git a/drivers/gpu/drm/amd/display/dc/Makefile b/drivers/gpu/drm/amd/display/dc/Makefile
> index b4eca0236435..b801973749d2 100644
> --- a/drivers/gpu/drm/amd/display/dc/Makefile
> +++ b/drivers/gpu/drm/amd/display/dc/Makefile
> @@ -26,6 +26,9 @@
>  DC_LIBS = basics bios dml clk_mgr dce gpio irq link virtual
>  
>  ifdef CONFIG_DRM_AMD_DC_DCN
> +
> +KCOV_INSTRUMENT := n
> +
>  DC_LIBS += dcn20
>  DC_LIBS += dsc
>  DC_LIBS += dcn10


^ permalink raw reply	[flat|nested] 7+ messages in thread
* Re: [PATCH] drm/amd/display: Enable building new display engine with KCOV enabled
@ 2022-07-13 20:02   ` Harry Wentland
  0 siblings, 0 replies; 7+ messages in thread
From: Harry Wentland @ 2022-07-13 20:02 UTC (permalink / raw)
  To: Guenter Roeck
  Cc: Arnd Bergmann, Leo Li, linux-kernel, dri-devel, amd-gfx, Alex Deucher

On 2022-07-12 18:42, Guenter Roeck wrote:
> The new display engine uses floating point math, which is not supported
> by KCOV. Commit 9d1d02ff3678 ("drm/amd/display: Don't build DCN1 when kcov
> is enabled") tried to work around the problem by disabling
> CONFIG_DRM_AMD_DC_DCN if KCOV_INSTRUMENT_ALL and KCOV_ENABLE_COMPARISONS
> are enabled. The result is that KCOV can not be enabled on systems which
> require this display engine. A much simpler and less invasive solution is
> to disable KCOV selectively when compiling the display enagine while
> keeping it enabled for the rest of the kernel.
> 
> Fixes: 9d1d02ff3678 ("drm/amd/display: Don't build DCN1 when kcov is enabled")
> Cc: Arnd Bergmann <arnd@arndb.de>
> Cc: Leo Li <sunpeng.li@amd.com>
> Signed-off-by: Guenter Roeck <linux@roeck-us.net>

Reviewed-by: Harry Wentland <harry.wentland@amd.com>

Harry

> ---
>  drivers/gpu/drm/amd/display/Kconfig     | 2 +-
>  drivers/gpu/drm/amd/display/dc/Makefile | 3 +++
>  2 files changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/amd/display/Kconfig b/drivers/gpu/drm/amd/display/Kconfig
> index b4029c0d5d8c..96cbc87f7b6b 100644
> --- a/drivers/gpu/drm/amd/display/Kconfig
> +++ b/drivers/gpu/drm/amd/display/Kconfig
> @@ -6,7 +6,7 @@ config DRM_AMD_DC
>  	bool "AMD DC - Enable new display engine"
>  	default y
>  	select SND_HDA_COMPONENT if SND_HDA_CORE
> -	select DRM_AMD_DC_DCN if (X86 || PPC64) && !(KCOV_INSTRUMENT_ALL && KCOV_ENABLE_COMPARISONS)
> +	select DRM_AMD_DC_DCN if (X86 || PPC64)
>  	help
>  	  Choose this option if you want to use the new display engine
>  	  support for AMDGPU. This adds required support for Vega and
> diff --git a/drivers/gpu/drm/amd/display/dc/Makefile b/drivers/gpu/drm/amd/display/dc/Makefile
> index b4eca0236435..b801973749d2 100644
> --- a/drivers/gpu/drm/amd/display/dc/Makefile
> +++ b/drivers/gpu/drm/amd/display/dc/Makefile
> @@ -26,6 +26,9 @@
>  DC_LIBS = basics bios dml clk_mgr dce gpio irq link virtual
>  
>  ifdef CONFIG_DRM_AMD_DC_DCN
> +
> +KCOV_INSTRUMENT := n
> +
>  DC_LIBS += dcn20
>  DC_LIBS += dsc
>  DC_LIBS += dcn10


^ permalink raw reply	[flat|nested] 7+ messages in thread
* Re: [PATCH] drm/amd/display: Enable building new display engine with KCOV enabled
  2022-07-13 20:02   ` Harry Wentland
@ 2022-07-14 16:29     ` Alex Deucher
  -1 siblings, 0 replies; 7+ messages in thread
From: Alex Deucher @ 2022-07-14 16:29 UTC (permalink / raw)
  To: Harry Wentland
  Cc: Guenter Roeck, Arnd Bergmann, Leo Li, LKML,
	Maling list - DRI developers, amd-gfx list, Alex Deucher

Applied.  Thanks!

On Wed, Jul 13, 2022 at 4:03 PM Harry Wentland <harry.wentland@amd.com> wrote:
>
> On 2022-07-12 18:42, Guenter Roeck wrote:
> > The new display engine uses floating point math, which is not supported
> > by KCOV. Commit 9d1d02ff3678 ("drm/amd/display: Don't build DCN1 when kcov
> > is enabled") tried to work around the problem by disabling
> > CONFIG_DRM_AMD_DC_DCN if KCOV_INSTRUMENT_ALL and KCOV_ENABLE_COMPARISONS
> > are enabled. The result is that KCOV can not be enabled on systems which
> > require this display engine. A much simpler and less invasive solution is
> > to disable KCOV selectively when compiling the display enagine while
> > keeping it enabled for the rest of the kernel.
> >
> > Fixes: 9d1d02ff3678 ("drm/amd/display: Don't build DCN1 when kcov is enabled")
> > Cc: Arnd Bergmann <arnd@arndb.de>
> > Cc: Leo Li <sunpeng.li@amd.com>
> > Signed-off-by: Guenter Roeck <linux@roeck-us.net>
>
> Reviewed-by: Harry Wentland <harry.wentland@amd.com>
>
> Harry
>
> > ---
> >  drivers/gpu/drm/amd/display/Kconfig     | 2 +-
> >  drivers/gpu/drm/amd/display/dc/Makefile | 3 +++
> >  2 files changed, 4 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/gpu/drm/amd/display/Kconfig b/drivers/gpu/drm/amd/display/Kconfig
> > index b4029c0d5d8c..96cbc87f7b6b 100644
> > --- a/drivers/gpu/drm/amd/display/Kconfig
> > +++ b/drivers/gpu/drm/amd/display/Kconfig
> > @@ -6,7 +6,7 @@ config DRM_AMD_DC
> >       bool "AMD DC - Enable new display engine"
> >       default y
> >       select SND_HDA_COMPONENT if SND_HDA_CORE
> > -     select DRM_AMD_DC_DCN if (X86 || PPC64) && !(KCOV_INSTRUMENT_ALL && KCOV_ENABLE_COMPARISONS)
> > +     select DRM_AMD_DC_DCN if (X86 || PPC64)
> >       help
> >         Choose this option if you want to use the new display engine
> >         support for AMDGPU. This adds required support for Vega and
> > diff --git a/drivers/gpu/drm/amd/display/dc/Makefile b/drivers/gpu/drm/amd/display/dc/Makefile
> > index b4eca0236435..b801973749d2 100644
> > --- a/drivers/gpu/drm/amd/display/dc/Makefile
> > +++ b/drivers/gpu/drm/amd/display/dc/Makefile
> > @@ -26,6 +26,9 @@
> >  DC_LIBS = basics bios dml clk_mgr dce gpio irq link virtual
> >
> >  ifdef CONFIG_DRM_AMD_DC_DCN
> > +
> > +KCOV_INSTRUMENT := n
> > +
> >  DC_LIBS += dcn20
> >  DC_LIBS += dsc
> >  DC_LIBS += dcn10
>

^ permalink raw reply	[flat|nested] 7+ messages in thread
* Re: [PATCH] drm/amd/display: Enable building new display engine with KCOV enabled
@ 2022-07-14 16:29     ` Alex Deucher
  0 siblings, 0 replies; 7+ messages in thread
From: Alex Deucher @ 2022-07-14 16:29 UTC (permalink / raw)
  To: Harry Wentland
  Cc: Arnd Bergmann, Leo Li, LKML, Maling list - DRI developers,
	amd-gfx list, Alex Deucher, Guenter Roeck

Applied.  Thanks!

On Wed, Jul 13, 2022 at 4:03 PM Harry Wentland <harry.wentland@amd.com> wrote:
>
> On 2022-07-12 18:42, Guenter Roeck wrote:
> > The new display engine uses floating point math, which is not supported
> > by KCOV. Commit 9d1d02ff3678 ("drm/amd/display: Don't build DCN1 when kcov
> > is enabled") tried to work around the problem by disabling
> > CONFIG_DRM_AMD_DC_DCN if KCOV_INSTRUMENT_ALL and KCOV_ENABLE_COMPARISONS
> > are enabled. The result is that KCOV can not be enabled on systems which
> > require this display engine. A much simpler and less invasive solution is
> > to disable KCOV selectively when compiling the display enagine while
> > keeping it enabled for the rest of the kernel.
> >
> > Fixes: 9d1d02ff3678 ("drm/amd/display: Don't build DCN1 when kcov is enabled")
> > Cc: Arnd Bergmann <arnd@arndb.de>
> > Cc: Leo Li <sunpeng.li@amd.com>
> > Signed-off-by: Guenter Roeck <linux@roeck-us.net>
>
> Reviewed-by: Harry Wentland <harry.wentland@amd.com>
>
> Harry
>
> > ---
> >  drivers/gpu/drm/amd/display/Kconfig     | 2 +-
> >  drivers/gpu/drm/amd/display/dc/Makefile | 3 +++
> >  2 files changed, 4 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/gpu/drm/amd/display/Kconfig b/drivers/gpu/drm/amd/display/Kconfig
> > index b4029c0d5d8c..96cbc87f7b6b 100644
> > --- a/drivers/gpu/drm/amd/display/Kconfig
> > +++ b/drivers/gpu/drm/amd/display/Kconfig
> > @@ -6,7 +6,7 @@ config DRM_AMD_DC
> >       bool "AMD DC - Enable new display engine"
> >       default y
> >       select SND_HDA_COMPONENT if SND_HDA_CORE
> > -     select DRM_AMD_DC_DCN if (X86 || PPC64) && !(KCOV_INSTRUMENT_ALL && KCOV_ENABLE_COMPARISONS)
> > +     select DRM_AMD_DC_DCN if (X86 || PPC64)
> >       help
> >         Choose this option if you want to use the new display engine
> >         support for AMDGPU. This adds required support for Vega and
> > diff --git a/drivers/gpu/drm/amd/display/dc/Makefile b/drivers/gpu/drm/amd/display/dc/Makefile
> > index b4eca0236435..b801973749d2 100644
> > --- a/drivers/gpu/drm/amd/display/dc/Makefile
> > +++ b/drivers/gpu/drm/amd/display/dc/Makefile
> > @@ -26,6 +26,9 @@
> >  DC_LIBS = basics bios dml clk_mgr dce gpio irq link virtual
> >
> >  ifdef CONFIG_DRM_AMD_DC_DCN
> > +
> > +KCOV_INSTRUMENT := n
> > +
> >  DC_LIBS += dcn20
> >  DC_LIBS += dsc
> >  DC_LIBS += dcn10
>

^ permalink raw reply	[flat|nested] 7+ messages in thread
* Re: [PATCH] drm/amd/display: Enable building new display engine with KCOV enabled
  2022-07-14 16:29     ` Alex Deucher
  (?)
@ 2022-07-14 17:20     ` Guenter Roeck
  -1 siblings, 0 replies; 7+ messages in thread
From: Guenter Roeck @ 2022-07-14 17:20 UTC (permalink / raw)
  To: Alex Deucher, Harry Wentland
  Cc: Arnd Bergmann, Leo Li, LKML, Maling list - DRI developers,
	amd-gfx list, Alex Deucher

On 7/14/22 09:29, Alex Deucher wrote:
> Applied.  Thanks!
> 
> On Wed, Jul 13, 2022 at 4:03 PM Harry Wentland <harry.wentland@amd.com> wrote:
>>
>> On 2022-07-12 18:42, Guenter Roeck wrote:
>>> The new display engine uses floating point math, which is not supported
>>> by KCOV. Commit 9d1d02ff3678 ("drm/amd/display: Don't build DCN1 when kcov
>>> is enabled") tried to work around the problem by disabling
>>> CONFIG_DRM_AMD_DC_DCN if KCOV_INSTRUMENT_ALL and KCOV_ENABLE_COMPARISONS
>>> are enabled. The result is that KCOV can not be enabled on systems which
>>> require this display engine. A much simpler and less invasive solution is
>>> to disable KCOV selectively when compiling the display enagine while

"enagine". Outch.

Anyway, thanks for applying.

Guenter

>>> keeping it enabled for the rest of the kernel.
>>>
>>> Fixes: 9d1d02ff3678 ("drm/amd/display: Don't build DCN1 when kcov is enabled")
>>> Cc: Arnd Bergmann <arnd@arndb.de>
>>> Cc: Leo Li <sunpeng.li@amd.com>
>>> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
>>
>> Reviewed-by: Harry Wentland <harry.wentland@amd.com>
>>
>> Harry
>>
>>> ---
>>>   drivers/gpu/drm/amd/display/Kconfig     | 2 +-
>>>   drivers/gpu/drm/amd/display/dc/Makefile | 3 +++
>>>   2 files changed, 4 insertions(+), 1 deletion(-)
>>>
>>> diff --git a/drivers/gpu/drm/amd/display/Kconfig b/drivers/gpu/drm/amd/display/Kconfig
>>> index b4029c0d5d8c..96cbc87f7b6b 100644
>>> --- a/drivers/gpu/drm/amd/display/Kconfig
>>> +++ b/drivers/gpu/drm/amd/display/Kconfig
>>> @@ -6,7 +6,7 @@ config DRM_AMD_DC
>>>        bool "AMD DC - Enable new display engine"
>>>        default y
>>>        select SND_HDA_COMPONENT if SND_HDA_CORE
>>> -     select DRM_AMD_DC_DCN if (X86 || PPC64) && !(KCOV_INSTRUMENT_ALL && KCOV_ENABLE_COMPARISONS)
>>> +     select DRM_AMD_DC_DCN if (X86 || PPC64)
>>>        help
>>>          Choose this option if you want to use the new display engine
>>>          support for AMDGPU. This adds required support for Vega and
>>> diff --git a/drivers/gpu/drm/amd/display/dc/Makefile b/drivers/gpu/drm/amd/display/dc/Makefile
>>> index b4eca0236435..b801973749d2 100644
>>> --- a/drivers/gpu/drm/amd/display/dc/Makefile
>>> +++ b/drivers/gpu/drm/amd/display/dc/Makefile
>>> @@ -26,6 +26,9 @@
>>>   DC_LIBS = basics bios dml clk_mgr dce gpio irq link virtual
>>>
>>>   ifdef CONFIG_DRM_AMD_DC_DCN
>>> +
>>> +KCOV_INSTRUMENT := n
>>> +
>>>   DC_LIBS += dcn20
>>>   DC_LIBS += dsc
>>>   DC_LIBS += dcn10
>>


^ permalink raw reply	[flat|nested] 7+ messages in thread
end of thread, other threads:[~2022-07-14 17:20 UTC | newest]

Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-07-12 22:42 [PATCH] drm/amd/display: Enable building new display engine with KCOV enabled Guenter Roeck
2022-07-12 22:42 ` Guenter Roeck
2022-07-13 20:02 ` Harry Wentland
2022-07-13 20:02   ` Harry Wentland
2022-07-14 16:29   ` Alex Deucher
2022-07-14 16:29     ` Alex Deucher
2022-07-14 17:20     ` Guenter Roeck

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