Re: [Intel-gfx] [PATCH] drm/i915: add support for specifying DMC firmware override by module param

[Srivatsa, Anusha]

Hi,

This patch could be really helpful Is there any issue with it? It's not 
merged yet.

Regards,
Anusha 
>-Original Message-
>From: Intel-gfx [mailto:intel-gfx-boun...@lists.freedesktop.org] On Behalf Of
>Jani Nikula
>Sent: Wednesday, November 22, 2017 8:20 AM
>To: Joonas Lahtinen <joonas.lahti...@linux.intel.com>; David Weinehall
><david.weineh...@linux.intel.com>
>Cc: intel-gfx@lists.freedesktop.org
>Subject: Re: [Intel-gfx] [PATCH] drm/i915: add support for specifying DMC
>firmware override by module param
>
>On Wed, 22 Nov 2017, Joonas Lahtinen <joonas.lahti...@linux.intel.com>
>wrote:
>> On Tue, 2017-11-21 at 23:54 +0200, Jani Nikula wrote:
>>> On Tue, 21 Nov 2017, David Weinehall <david.weineh...@linux.intel.com>
>wrote:
>>> > On Tue, Nov 21, 2017 at 01:51:29PM +0200, Jani Nikula wrote:
>>> > > Use i915.dmc_firmware_path to override default firmware for the
>>> > > platform and bypassing version checks.
>>> > >
>>> > > Signed-off-by: Jani Nikula <jani.nik...@intel.com>
>>> > >
>>> > > ---
>>> > >
>>> > > Untested.
>>> >
>>> > Yeah, it kind of shows.  It fails to compile :D
>>>
>>> Oops. I was anxious to get the patch on the list in the heat of IRC
>>> discussion, and just added the disclaimer instead of doing this
>>> properly... *blush*
>>>
>>> >
>>> > But if you chuck in:
>>> >
>>> > param(char *, dmc_firmware_path, NULL) \
>>
>> I think I already raised my suggestion earlier, but here it goes again.
>> Maybe we should consider consolidating these into:
>>
>> i915.firmware=guc:whatever.bin i915.firmware=dmc:whatever.bin
>
>I don't think that's possible. I didn't double check but I think you only get 
>one
>value from the module param code. Unless you roll your own modparam hooks,
>which is best avoided.
>
>> Then something like "i915.firmware=guc:disable" could be supported,
>> too.
>
>i915.dmc_firmware_path="" could mean disable.
>
>BR,
>Jani.
>
>
>>
>> Regards, Joonas
>>
>>> >
>>> > in i915_params.h
>>> >
>>> > Things work correctly and you can use:
>>> >
>>> > Tested-by: David Weinehall <david.weineh...@linux.intel.com>
>>> > Reviewed-by: David Weinehall <david.weineh...@linux.intel.com>
>>>
>>> Thanks. But let's wait for more input on whether this is really what
>>> people want. Perhaps this is useful *regardless* of the outcome of
>>> the other discussions.
>>>
>>> BR,
>>> Jani.
>>>
>>>
>>> >
>>> > > ---
>>> > >  drivers/gpu/drm/i915/i915_params.c | 3 +++
>>> > >  drivers/gpu/drm/i915/intel_csr.c   | 9 +++--
>>> > >  2 files changed, 10 insertions(+), 2 deletions(-)
>>> > >
>>> > > diff --git a/drivers/gpu/drm/i915/i915_params.c
>>> > > b/drivers/gpu/drm/i915/i915_params.c
>>> > > index 3328147b4863..c11ad6d67fa9 100644
>>> > > --- a/drivers/gpu/drm/i915/i915_params.c
>>> > > +++ b/drivers/gpu/drm/i915/i915_params.c
>>> > > @@ -171,6 +171,9 @@ i915_param_named_unsafe(guc_firmware_path,
>>> > > charp, 0400,  i915_param_named_unsafe(huc_firmware_path, charp,
>0400,
>>> > > "HuC firmware path to use instead of the default one");
>>> > >
>>> > > +i915_param_named_unsafe(dmc_firmware_path, charp, 0400,
>>> > > +   "DMC firmware path to use instead of the default one");
>>> > > +
>>> > >  i915_param_named_unsafe(enable_dp_mst, bool, 0600,
>>> > > "Enable multi-stream transport (MST) for new DisplayPort sinks.
>>> > > (default: true)");
>>> > >
>>> > > diff --git a/drivers/gpu/drm/i915/intel_csr.c
>>> > > b/drivers/gpu/drm/i915/intel_csr.c
>>> > > index 77d8b3d483ca..82db376ec7e1 100644
>>> > > --- a/drivers/gpu/drm/i915/intel_csr.c
>>> > > +++ b/drivers/gpu/drm/i915/intel_csr.c
>>> > > @@ -296,7 +296,10 @@ static uint32_t *parse_csr_fw(struct
>>> > > drm_i915_private *dev_priv,
>>> > >
>>> > > csr->version = css_header->version;
>>> > >
>>> > > -   if (IS_CANNONLAKE(dev_priv)) {
>>>

Re: [Intel-gfx] [PATCH] drm/i915: add support for specifying DMC firmware override by module param

[Srivatsa, Anusha]

>-Original Message-
>From: Intel-gfx [mailto:intel-gfx-boun...@lists.freedesktop.org] On Behalf Of
>Jani Nikula
>Sent: Wednesday, November 22, 2017 8:20 AM
>To: Joonas Lahtinen <joonas.lahti...@linux.intel.com>; David Weinehall
><david.weineh...@linux.intel.com>
>Cc: intel-gfx@lists.freedesktop.org
>Subject: Re: [Intel-gfx] [PATCH] drm/i915: add support for specifying DMC
>firmware override by module param
>
>On Wed, 22 Nov 2017, Joonas Lahtinen <joonas.lahti...@linux.intel.com>
>wrote:
>> On Tue, 2017-11-21 at 23:54 +0200, Jani Nikula wrote:
>>> On Tue, 21 Nov 2017, David Weinehall <david.weineh...@linux.intel.com>
>wrote:
>>> > On Tue, Nov 21, 2017 at 01:51:29PM +0200, Jani Nikula wrote:
>>> > > Use i915.dmc_firmware_path to override default firmware for the
>>> > > platform and bypassing version checks.
>>> > >
>>> > > Signed-off-by: Jani Nikula <jani.nik...@intel.com>
>>> > >
>>> > > ---
>>> > >
>>> > > Untested.
>>> >
>>> > Yeah, it kind of shows.  It fails to compile :D
>>>
>>> Oops. I was anxious to get the patch on the list in the heat of IRC
>>> discussion, and just added the disclaimer instead of doing this
>>> properly... *blush*
>>>
>>> >
>>> > But if you chuck in:
>>> >
>>> > param(char *, dmc_firmware_path, NULL) \
>>
>> I think I already raised my suggestion earlier, but here it goes again.
>> Maybe we should consider consolidating these into:
>>
>> i915.firmware=guc:whatever.bin i915.firmware=dmc:whatever.bin
>
>I don't think that's possible. I didn't double check but I think you only get 
>one
>value from the module param code. Unless you roll your own modparam hooks,
>which is best avoided.
>
>> Then something like "i915.firmware=guc:disable" could be supported,
>> too.
>
>i915.dmc_firmware_path="" could mean disable.
>
>BR,
>Jani.
>
>
>>
>> Regards, Joonas
>>
>>> >
>>> > in i915_params.h
>>> >
>>> > Things work correctly and you can use:
>>> >
>>> > Tested-by: David Weinehall <david.weineh...@linux.intel.com>
>>> > Reviewed-by: David Weinehall <david.weineh...@linux.intel.com>
>>>
>>> Thanks. But let's wait for more input on whether this is really what
>>> people want. Perhaps this is useful *regardless* of the outcome of
>>> the other discussions.

I believe this patch is going to be useful anyway IT would make things a 
lot easier for testing purpose. I think we should get this merged.

Does anyone have any concerns?

Anusha 
>>> BR,
>>> Jani.
>>>
>>>
>>> >
>>> > > ---
>>> > >  drivers/gpu/drm/i915/i915_params.c | 3 +++
>>> > >  drivers/gpu/drm/i915/intel_csr.c   | 9 +++--
>>> > >  2 files changed, 10 insertions(+), 2 deletions(-)
>>> > >
>>> > > diff --git a/drivers/gpu/drm/i915/i915_params.c
>>> > > b/drivers/gpu/drm/i915/i915_params.c
>>> > > index 3328147b4863..c11ad6d67fa9 100644
>>> > > --- a/drivers/gpu/drm/i915/i915_params.c
>>> > > +++ b/drivers/gpu/drm/i915/i915_params.c
>>> > > @@ -171,6 +171,9 @@ i915_param_named_unsafe(guc_firmware_path,
>>> > > charp, 0400,  i915_param_named_unsafe(huc_firmware_path, charp,
>0400,
>>> > > "HuC firmware path to use instead of the default one");
>>> > >
>>> > > +i915_param_named_unsafe(dmc_firmware_path, charp, 0400,
>>> > > +   "DMC firmware path to use instead of the default one");
>>> > > +
>>> > >  i915_param_named_unsafe(enable_dp_mst, bool, 0600,
>>> > > "Enable multi-stream transport (MST) for new DisplayPort sinks.
>>> > > (default: true)");
>>> > >
>>> > > diff --git a/drivers/gpu/drm/i915/intel_csr.c
>>> > > b/drivers/gpu/drm/i915/intel_csr.c
>>> > > index 77d8b3d483ca..82db376ec7e1 100644
>>> > > --- a/drivers/gpu/drm/i915/intel_csr.c
>>> > > +++ b/drivers/gpu/drm/i915/intel_csr.c
>>> > > @@ -296,7 +296,10 @@ static uint32_t *parse_csr_fw(struct
>>> > > drm_i915_private *dev_priv,
>>> > >
>>> > > csr->version = css_header->version;
>>> > >
>>> &g

Re: [Intel-gfx] [PATCH] drm/i915: add support for specifying DMC firmware override by module param

[Jani Nikula]

On Wed, 22 Nov 2017, Joonas Lahtinen  wrote:
> On Tue, 2017-11-21 at 23:54 +0200, Jani Nikula wrote:
>> On Tue, 21 Nov 2017, David Weinehall  wrote:
>> > On Tue, Nov 21, 2017 at 01:51:29PM +0200, Jani Nikula wrote:
>> > > Use i915.dmc_firmware_path to override default firmware for the platform
>> > > and bypassing version checks.
>> > > 
>> > > Signed-off-by: Jani Nikula 
>> > > 
>> > > ---
>> > > 
>> > > Untested.
>> > 
>> > Yeah, it kind of shows.  It fails to compile :D
>> 
>> Oops. I was anxious to get the patch on the list in the heat of IRC
>> discussion, and just added the disclaimer instead of doing this
>> properly... *blush*
>> 
>> > 
>> > But if you chuck in:
>> > 
>> > param(char *, dmc_firmware_path, NULL) \
>
> I think I already raised my suggestion earlier, but here it goes again.
> Maybe we should consider consolidating these into:
>
> i915.firmware=guc:whatever.bin i915.firmware=dmc:whatever.bin

I don't think that's possible. I didn't double check but I think you
only get one value from the module param code. Unless you roll your own
modparam hooks, which is best avoided.

> Then something like "i915.firmware=guc:disable" could be supported,
> too.

i915.dmc_firmware_path="" could mean disable.

BR,
Jani.


>
> Regards, Joonas
>
>> > 
>> > in i915_params.h
>> > 
>> > Things work correctly and you can use:
>> > 
>> > Tested-by: David Weinehall 
>> > Reviewed-by: David Weinehall 
>> 
>> Thanks. But let's wait for more input on whether this is really what
>> people want. Perhaps this is useful *regardless* of the outcome of the
>> other discussions.
>> 
>> BR,
>> Jani.
>> 
>> 
>> > 
>> > > ---
>> > >  drivers/gpu/drm/i915/i915_params.c | 3 +++
>> > >  drivers/gpu/drm/i915/intel_csr.c   | 9 +++--
>> > >  2 files changed, 10 insertions(+), 2 deletions(-)
>> > > 
>> > > diff --git a/drivers/gpu/drm/i915/i915_params.c 
>> > > b/drivers/gpu/drm/i915/i915_params.c
>> > > index 3328147b4863..c11ad6d67fa9 100644
>> > > --- a/drivers/gpu/drm/i915/i915_params.c
>> > > +++ b/drivers/gpu/drm/i915/i915_params.c
>> > > @@ -171,6 +171,9 @@ i915_param_named_unsafe(guc_firmware_path, charp, 
>> > > 0400,
>> > >  i915_param_named_unsafe(huc_firmware_path, charp, 0400,
>> > >  "HuC firmware path to use instead of the default one");
>> > >  
>> > > +i915_param_named_unsafe(dmc_firmware_path, charp, 0400,
>> > > +"DMC firmware path to use instead of the default one");
>> > > +
>> > >  i915_param_named_unsafe(enable_dp_mst, bool, 0600,
>> > >  "Enable multi-stream transport (MST) for new DisplayPort sinks. 
>> > > (default: true)");
>> > >  
>> > > diff --git a/drivers/gpu/drm/i915/intel_csr.c 
>> > > b/drivers/gpu/drm/i915/intel_csr.c
>> > > index 77d8b3d483ca..82db376ec7e1 100644
>> > > --- a/drivers/gpu/drm/i915/intel_csr.c
>> > > +++ b/drivers/gpu/drm/i915/intel_csr.c
>> > > @@ -296,7 +296,10 @@ static uint32_t *parse_csr_fw(struct 
>> > > drm_i915_private *dev_priv,
>> > >  
>> > >  csr->version = css_header->version;
>> > >  
>> > > -if (IS_CANNONLAKE(dev_priv)) {
>> > > +if (csr->fw_path == i915_modparams.dmc_firmware_path) {
>> > > +/* Bypass version check for firmware override. */
>> > > +required_version = csr->version;
>> > > +} else if (IS_CANNONLAKE(dev_priv)) {
>> > >  required_version = CNL_CSR_VERSION_REQUIRED;
>> > >  } else if (IS_GEMINILAKE(dev_priv)) {
>> > >  required_version = GLK_CSR_VERSION_REQUIRED;
>> > > @@ -451,7 +454,9 @@ void intel_csr_ucode_init(struct drm_i915_private 
>> > > *dev_priv)
>> > >  if (!HAS_CSR(dev_priv))
>> > >  return;
>> > >  
>> > > -if (IS_CANNONLAKE(dev_priv))
>> > > +if (i915_modparams.dmc_firmware_path)
>> > > +csr->fw_path = i915_modparams.dmc_firmware_path;
>> > > +else if (IS_CANNONLAKE(dev_priv))
>> > >  csr->fw_path = I915_CSR_CNL;
>> > >  else if (IS_GEMINILAKE(dev_priv))
>> > >  csr->fw_path = I915_CSR_GLK;
>> > > -- 
>> > > 2.11.0
>> > > 
>> > > ___
>> > > Intel-gfx mailing list
>> > > Intel-gfx@lists.freedesktop.org
>> > > https://lists.freedesktop.org/mailman/listinfo/intel-gfx
>> 
>> 

-- 
Jani Nikula, Intel Open Source Technology Center
___
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

Re: [Intel-gfx] [PATCH] drm/i915: add support for specifying DMC firmware override by module param

[David Weinehall]

On Tue, Nov 21, 2017 at 11:54:16PM +0200, Jani Nikula wrote:
> On Tue, 21 Nov 2017, David Weinehall  wrote:
> > On Tue, Nov 21, 2017 at 01:51:29PM +0200, Jani Nikula wrote:
> >> Use i915.dmc_firmware_path to override default firmware for the platform
> >> and bypassing version checks.
> >> 
> >> Signed-off-by: Jani Nikula 
> >> 
> >> ---
> >> 
> >> Untested.
> >
> > Yeah, it kind of shows.  It fails to compile :D
> 
> Oops. I was anxious to get the patch on the list in the heat of IRC
> discussion, and just added the disclaimer instead of doing this
> properly... *blush*
> 
> >
> > But if you chuck in:
> >
> > param(char *, dmc_firmware_path, NULL) \
> >
> > in i915_params.h
> >
> > Things work correctly and you can use:
> >
> > Tested-by: David Weinehall 
> > Reviewed-by: David Weinehall 
> 
> Thanks. But let's wait for more input on whether this is really what
> people want. Perhaps this is useful *regardless* of the outcome of the
> other discussions.

Fine by me. FWIW *we* (as in the PnP testing team) would definitely
benefit if this patch got merged, since we'd be able to simplify
automated testing of different versions of DMC.

> BR,
> Jani.
> 
> 
> >
> >> ---
> >>  drivers/gpu/drm/i915/i915_params.c | 3 +++
> >>  drivers/gpu/drm/i915/intel_csr.c   | 9 +++--
> >>  2 files changed, 10 insertions(+), 2 deletions(-)
> >> 
> >> diff --git a/drivers/gpu/drm/i915/i915_params.c 
> >> b/drivers/gpu/drm/i915/i915_params.c
> >> index 3328147b4863..c11ad6d67fa9 100644
> >> --- a/drivers/gpu/drm/i915/i915_params.c
> >> +++ b/drivers/gpu/drm/i915/i915_params.c
> >> @@ -171,6 +171,9 @@ i915_param_named_unsafe(guc_firmware_path, charp, 0400,
> >>  i915_param_named_unsafe(huc_firmware_path, charp, 0400,
> >>"HuC firmware path to use instead of the default one");
> >>  
> >> +i915_param_named_unsafe(dmc_firmware_path, charp, 0400,
> >> +  "DMC firmware path to use instead of the default one");
> >> +
> >>  i915_param_named_unsafe(enable_dp_mst, bool, 0600,
> >>"Enable multi-stream transport (MST) for new DisplayPort sinks. 
> >> (default: true)");
> >>  
> >> diff --git a/drivers/gpu/drm/i915/intel_csr.c 
> >> b/drivers/gpu/drm/i915/intel_csr.c
> >> index 77d8b3d483ca..82db376ec7e1 100644
> >> --- a/drivers/gpu/drm/i915/intel_csr.c
> >> +++ b/drivers/gpu/drm/i915/intel_csr.c
> >> @@ -296,7 +296,10 @@ static uint32_t *parse_csr_fw(struct drm_i915_private 
> >> *dev_priv,
> >>  
> >>csr->version = css_header->version;
> >>  
> >> -  if (IS_CANNONLAKE(dev_priv)) {
> >> +  if (csr->fw_path == i915_modparams.dmc_firmware_path) {
> >> +  /* Bypass version check for firmware override. */
> >> +  required_version = csr->version;
> >> +  } else if (IS_CANNONLAKE(dev_priv)) {
> >>required_version = CNL_CSR_VERSION_REQUIRED;
> >>} else if (IS_GEMINILAKE(dev_priv)) {
> >>required_version = GLK_CSR_VERSION_REQUIRED;
> >> @@ -451,7 +454,9 @@ void intel_csr_ucode_init(struct drm_i915_private 
> >> *dev_priv)
> >>if (!HAS_CSR(dev_priv))
> >>return;
> >>  
> >> -  if (IS_CANNONLAKE(dev_priv))
> >> +  if (i915_modparams.dmc_firmware_path)
> >> +  csr->fw_path = i915_modparams.dmc_firmware_path;
> >> +  else if (IS_CANNONLAKE(dev_priv))
> >>csr->fw_path = I915_CSR_CNL;
> >>else if (IS_GEMINILAKE(dev_priv))
> >>csr->fw_path = I915_CSR_GLK;
> >> -- 
> >> 2.11.0
> >> 
> >> ___
> >> Intel-gfx mailing list
> >> Intel-gfx@lists.freedesktop.org
> >> https://lists.freedesktop.org/mailman/listinfo/intel-gfx
> 
> -- 
> Jani Nikula, Intel Open Source Technology Center
___
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

Re: [Intel-gfx] [PATCH] drm/i915: add support for specifying DMC firmware override by module param

[Joonas Lahtinen]

On Tue, 2017-11-21 at 23:54 +0200, Jani Nikula wrote:
> On Tue, 21 Nov 2017, David Weinehall  wrote:
> > On Tue, Nov 21, 2017 at 01:51:29PM +0200, Jani Nikula wrote:
> > > Use i915.dmc_firmware_path to override default firmware for the platform
> > > and bypassing version checks.
> > > 
> > > Signed-off-by: Jani Nikula 
> > > 
> > > ---
> > > 
> > > Untested.
> > 
> > Yeah, it kind of shows.  It fails to compile :D
> 
> Oops. I was anxious to get the patch on the list in the heat of IRC
> discussion, and just added the disclaimer instead of doing this
> properly... *blush*
> 
> > 
> > But if you chuck in:
> > 
> > param(char *, dmc_firmware_path, NULL) \

I think I already raised my suggestion earlier, but here it goes again.
Maybe we should consider consolidating these into:

i915.firmware=guc:whatever.bin i915.firmware=dmc:whatever.bin

Then something like "i915.firmware=guc:disable" could be supported,
too.

Regards, Joonas

> > 
> > in i915_params.h
> > 
> > Things work correctly and you can use:
> > 
> > Tested-by: David Weinehall 
> > Reviewed-by: David Weinehall 
> 
> Thanks. But let's wait for more input on whether this is really what
> people want. Perhaps this is useful *regardless* of the outcome of the
> other discussions.
> 
> BR,
> Jani.
> 
> 
> > 
> > > ---
> > >  drivers/gpu/drm/i915/i915_params.c | 3 +++
> > >  drivers/gpu/drm/i915/intel_csr.c   | 9 +++--
> > >  2 files changed, 10 insertions(+), 2 deletions(-)
> > > 
> > > diff --git a/drivers/gpu/drm/i915/i915_params.c 
> > > b/drivers/gpu/drm/i915/i915_params.c
> > > index 3328147b4863..c11ad6d67fa9 100644
> > > --- a/drivers/gpu/drm/i915/i915_params.c
> > > +++ b/drivers/gpu/drm/i915/i915_params.c
> > > @@ -171,6 +171,9 @@ i915_param_named_unsafe(guc_firmware_path, charp, 
> > > 0400,
> > >  i915_param_named_unsafe(huc_firmware_path, charp, 0400,
> > >   "HuC firmware path to use instead of the default one");
> > >  
> > > +i915_param_named_unsafe(dmc_firmware_path, charp, 0400,
> > > + "DMC firmware path to use instead of the default one");
> > > +
> > >  i915_param_named_unsafe(enable_dp_mst, bool, 0600,
> > >   "Enable multi-stream transport (MST) for new DisplayPort sinks. 
> > > (default: true)");
> > >  
> > > diff --git a/drivers/gpu/drm/i915/intel_csr.c 
> > > b/drivers/gpu/drm/i915/intel_csr.c
> > > index 77d8b3d483ca..82db376ec7e1 100644
> > > --- a/drivers/gpu/drm/i915/intel_csr.c
> > > +++ b/drivers/gpu/drm/i915/intel_csr.c
> > > @@ -296,7 +296,10 @@ static uint32_t *parse_csr_fw(struct 
> > > drm_i915_private *dev_priv,
> > >  
> > >   csr->version = css_header->version;
> > >  
> > > - if (IS_CANNONLAKE(dev_priv)) {
> > > + if (csr->fw_path == i915_modparams.dmc_firmware_path) {
> > > + /* Bypass version check for firmware override. */
> > > + required_version = csr->version;
> > > + } else if (IS_CANNONLAKE(dev_priv)) {
> > >   required_version = CNL_CSR_VERSION_REQUIRED;
> > >   } else if (IS_GEMINILAKE(dev_priv)) {
> > >   required_version = GLK_CSR_VERSION_REQUIRED;
> > > @@ -451,7 +454,9 @@ void intel_csr_ucode_init(struct drm_i915_private 
> > > *dev_priv)
> > >   if (!HAS_CSR(dev_priv))
> > >   return;
> > >  
> > > - if (IS_CANNONLAKE(dev_priv))
> > > + if (i915_modparams.dmc_firmware_path)
> > > + csr->fw_path = i915_modparams.dmc_firmware_path;
> > > + else if (IS_CANNONLAKE(dev_priv))
> > >   csr->fw_path = I915_CSR_CNL;
> > >   else if (IS_GEMINILAKE(dev_priv))
> > >   csr->fw_path = I915_CSR_GLK;
> > > -- 
> > > 2.11.0
> > > 
> > > ___
> > > Intel-gfx mailing list
> > > Intel-gfx@lists.freedesktop.org
> > > https://lists.freedesktop.org/mailman/listinfo/intel-gfx
> 
> 
-- 
Joonas Lahtinen
Open Source Technology Center
Intel Corporation
___
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

Re: [Intel-gfx] [PATCH] drm/i915: add support for specifying DMC firmware override by module param

[Jani Nikula]

On Tue, 21 Nov 2017, David Weinehall  wrote:
> On Tue, Nov 21, 2017 at 01:51:29PM +0200, Jani Nikula wrote:
>> Use i915.dmc_firmware_path to override default firmware for the platform
>> and bypassing version checks.
>> 
>> Signed-off-by: Jani Nikula 
>> 
>> ---
>> 
>> Untested.
>
> Yeah, it kind of shows.  It fails to compile :D

Oops. I was anxious to get the patch on the list in the heat of IRC
discussion, and just added the disclaimer instead of doing this
properly... *blush*

>
> But if you chuck in:
>
> param(char *, dmc_firmware_path, NULL) \
>
> in i915_params.h
>
> Things work correctly and you can use:
>
> Tested-by: David Weinehall 
> Reviewed-by: David Weinehall 

Thanks. But let's wait for more input on whether this is really what
people want. Perhaps this is useful *regardless* of the outcome of the
other discussions.

BR,
Jani.


>
>> ---
>>  drivers/gpu/drm/i915/i915_params.c | 3 +++
>>  drivers/gpu/drm/i915/intel_csr.c   | 9 +++--
>>  2 files changed, 10 insertions(+), 2 deletions(-)
>> 
>> diff --git a/drivers/gpu/drm/i915/i915_params.c 
>> b/drivers/gpu/drm/i915/i915_params.c
>> index 3328147b4863..c11ad6d67fa9 100644
>> --- a/drivers/gpu/drm/i915/i915_params.c
>> +++ b/drivers/gpu/drm/i915/i915_params.c
>> @@ -171,6 +171,9 @@ i915_param_named_unsafe(guc_firmware_path, charp, 0400,
>>  i915_param_named_unsafe(huc_firmware_path, charp, 0400,
>>  "HuC firmware path to use instead of the default one");
>>  
>> +i915_param_named_unsafe(dmc_firmware_path, charp, 0400,
>> +"DMC firmware path to use instead of the default one");
>> +
>>  i915_param_named_unsafe(enable_dp_mst, bool, 0600,
>>  "Enable multi-stream transport (MST) for new DisplayPort sinks. 
>> (default: true)");
>>  
>> diff --git a/drivers/gpu/drm/i915/intel_csr.c 
>> b/drivers/gpu/drm/i915/intel_csr.c
>> index 77d8b3d483ca..82db376ec7e1 100644
>> --- a/drivers/gpu/drm/i915/intel_csr.c
>> +++ b/drivers/gpu/drm/i915/intel_csr.c
>> @@ -296,7 +296,10 @@ static uint32_t *parse_csr_fw(struct drm_i915_private 
>> *dev_priv,
>>  
>>  csr->version = css_header->version;
>>  
>> -if (IS_CANNONLAKE(dev_priv)) {
>> +if (csr->fw_path == i915_modparams.dmc_firmware_path) {
>> +/* Bypass version check for firmware override. */
>> +required_version = csr->version;
>> +} else if (IS_CANNONLAKE(dev_priv)) {
>>  required_version = CNL_CSR_VERSION_REQUIRED;
>>  } else if (IS_GEMINILAKE(dev_priv)) {
>>  required_version = GLK_CSR_VERSION_REQUIRED;
>> @@ -451,7 +454,9 @@ void intel_csr_ucode_init(struct drm_i915_private 
>> *dev_priv)
>>  if (!HAS_CSR(dev_priv))
>>  return;
>>  
>> -if (IS_CANNONLAKE(dev_priv))
>> +if (i915_modparams.dmc_firmware_path)
>> +csr->fw_path = i915_modparams.dmc_firmware_path;
>> +else if (IS_CANNONLAKE(dev_priv))
>>  csr->fw_path = I915_CSR_CNL;
>>  else if (IS_GEMINILAKE(dev_priv))
>>  csr->fw_path = I915_CSR_GLK;
>> -- 
>> 2.11.0
>> 
>> ___
>> Intel-gfx mailing list
>> Intel-gfx@lists.freedesktop.org
>> https://lists.freedesktop.org/mailman/listinfo/intel-gfx

-- 
Jani Nikula, Intel Open Source Technology Center
___
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx

Re: [Intel-gfx] [PATCH] drm/i915: add support for specifying DMC firmware override by module param

[David Weinehall]

On Tue, Nov 21, 2017 at 01:51:29PM +0200, Jani Nikula wrote:
> Use i915.dmc_firmware_path to override default firmware for the platform
> and bypassing version checks.
> 
> Signed-off-by: Jani Nikula 
> 
> ---
> 
> Untested.

Yeah, it kind of shows.  It fails to compile :D

But if you chuck in:

param(char *, dmc_firmware_path, NULL) \

in i915_params.h

Things work correctly and you can use:

Tested-by: David Weinehall 
Reviewed-by: David Weinehall 

> ---
>  drivers/gpu/drm/i915/i915_params.c | 3 +++
>  drivers/gpu/drm/i915/intel_csr.c   | 9 +++--
>  2 files changed, 10 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_params.c 
> b/drivers/gpu/drm/i915/i915_params.c
> index 3328147b4863..c11ad6d67fa9 100644
> --- a/drivers/gpu/drm/i915/i915_params.c
> +++ b/drivers/gpu/drm/i915/i915_params.c
> @@ -171,6 +171,9 @@ i915_param_named_unsafe(guc_firmware_path, charp, 0400,
>  i915_param_named_unsafe(huc_firmware_path, charp, 0400,
>   "HuC firmware path to use instead of the default one");
>  
> +i915_param_named_unsafe(dmc_firmware_path, charp, 0400,
> + "DMC firmware path to use instead of the default one");
> +
>  i915_param_named_unsafe(enable_dp_mst, bool, 0600,
>   "Enable multi-stream transport (MST) for new DisplayPort sinks. 
> (default: true)");
>  
> diff --git a/drivers/gpu/drm/i915/intel_csr.c 
> b/drivers/gpu/drm/i915/intel_csr.c
> index 77d8b3d483ca..82db376ec7e1 100644
> --- a/drivers/gpu/drm/i915/intel_csr.c
> +++ b/drivers/gpu/drm/i915/intel_csr.c
> @@ -296,7 +296,10 @@ static uint32_t *parse_csr_fw(struct drm_i915_private 
> *dev_priv,
>  
>   csr->version = css_header->version;
>  
> - if (IS_CANNONLAKE(dev_priv)) {
> + if (csr->fw_path == i915_modparams.dmc_firmware_path) {
> + /* Bypass version check for firmware override. */
> + required_version = csr->version;
> + } else if (IS_CANNONLAKE(dev_priv)) {
>   required_version = CNL_CSR_VERSION_REQUIRED;
>   } else if (IS_GEMINILAKE(dev_priv)) {
>   required_version = GLK_CSR_VERSION_REQUIRED;
> @@ -451,7 +454,9 @@ void intel_csr_ucode_init(struct drm_i915_private 
> *dev_priv)
>   if (!HAS_CSR(dev_priv))
>   return;
>  
> - if (IS_CANNONLAKE(dev_priv))
> + if (i915_modparams.dmc_firmware_path)
> + csr->fw_path = i915_modparams.dmc_firmware_path;
> + else if (IS_CANNONLAKE(dev_priv))
>   csr->fw_path = I915_CSR_CNL;
>   else if (IS_GEMINILAKE(dev_priv))
>   csr->fw_path = I915_CSR_GLK;
> -- 
> 2.11.0
> 
> ___
> Intel-gfx mailing list
> Intel-gfx@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/intel-gfx
___
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx