[Intel-gfx] [PATCH v3 01/13] drm/i915: Inherit Kabylake platform features from Skylake

[David Weinehall]

On Thu, Sep 28, 2017 at 08:38:58PM +0100, Chris Wilson wrote:
> I recently tried to update the gen9 feature matrix and to my unpleasant
> surprise found that Kabylake still acted like Broadwell and didn't
> enable the feature. This is because kbl/cfl are inheriting their
> defaults from Broadwell and not Skylake.
> 
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
> Cc: Paulo Zanoni <paulo.r.zanoni at intel.com>
> Cc: Mika Kuoppala <mika.kuoppala at linux.intel.com>
> ---
>  drivers/gpu/drm/i915/i915_pci.c | 21 +++++----------------
>  1 file changed, 5 insertions(+), 16 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_pci.c b/drivers/gpu/drm/i915/i915_pci.c
> index da60866b6628..01d4b569b2cc 100644
> --- a/drivers/gpu/drm/i915/i915_pci.c
> +++ b/drivers/gpu/drm/i915/i915_pci.c
> @@ -495,13 +495,9 @@ static const struct intel_device_info intel_geminilake_info __initconst = {
>  };
>  
>  #define KBL_PLATFORM \
> -	BDW_FEATURES, \
> -	.gen = 9, \
> +	SKL_PLATFORM, \
>  	.platform = INTEL_KABYLAKE, \
> -	.has_csr = 1, \
> -	.has_guc = 1, \
> -	.has_ipc = 1, \
> -	.ddb_size = 896
> +	.has_ipc = 1

This seems correct.

>  static const struct intel_device_info intel_kabylake_gt1_info __initconst = {
>  	KBL_PLATFORM,
> @@ -520,13 +516,8 @@ static const struct intel_device_info intel_kabylake_gt3_info __initconst = {
>  };
>  
>  #define CFL_PLATFORM \
> -	BDW_FEATURES, \
> -	.gen = 9, \
> -	.platform = INTEL_COFFEELAKE, \
> -	.has_csr = 1, \
> -	.has_guc = 1, \
> -	.has_ipc = 1, \
> -	.ddb_size = 896
> +	KBL_PLATFORM, \
> +	.platform = INTEL_COFFEELAKE

As does this.

>  static const struct intel_device_info intel_coffeelake_gt1_info __initconst = {
>  	CFL_PLATFORM,
> @@ -545,14 +536,12 @@ static const struct intel_device_info intel_coffeelake_gt3_info __initconst = {
>  };
>  
>  static const struct intel_device_info intel_cannonlake_gt2_info __initconst = {
> -	BDW_FEATURES,
> +	SKL_PLATFORM,
>  	.is_alpha_support = 1,
>  	.platform = INTEL_CANNONLAKE,
>  	.gen = 10,
>  	.gt = 2,
>  	.ddb_size = 1024,
> -	.has_csr = 1,
> -	.has_ipc = 1,
>  	.color = { .degamma_lut_size = 0, .gamma_lut_size = 1024 }
>  };

But not this. Since you're inheriting SKL_PLATFORM rather than
KBL_PLATFORM you're missing out on .has_ipc = 1.


Kind regards, David