[PATCH] drm/i915: don't warn about Skylake CPU - KabyPoint PCH combo

[PATCH] drm/i915: don't warn about Skylake CPU - KabyPoint PCH combo

[Jani Nikula]

Apparently there are machines out there with Skylake CPU and KabyPoint
PCH. Judging from our driver code, there doesn't seem to be any code
paths that would do anything different between SunrisePoint and
KabyPoint PCHs, so it would seem okay to accept the combo without
warnings.

Fixes: 22dea0be50b2 ("drm/i915: Introduce Kabypoint PCH for Kabylake H/DT.")
References: https://lists.freedesktop.org/archives/intel-gfx/2017-February/118611.html
Reported-by: Rainer Koenig <Rainer.Koenig@ts.fujitsu.com>
Cc: Rainer Koenig <Rainer.Koenig@ts.fujitsu.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: <stable@vger.kernel.org> # v4.8+
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
---
 drivers/gpu/drm/i915/i915_drv.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 267d5f8c49e1..6a430648fa71 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -213,7 +213,8 @@ static void intel_detect_pch(struct drm_i915_private *dev_priv)
 			} else if (id == INTEL_PCH_KBP_DEVICE_ID_TYPE) {
 				dev_priv->pch_type = PCH_KBP;
 				DRM_DEBUG_KMS("Found KabyPoint PCH\n");
-				WARN_ON(!IS_KABYLAKE(dev_priv));
+				WARN_ON(!IS_SKYLAKE(dev_priv) &&
+					!IS_KABYLAKE(dev_priv));
 			} else if ((id == INTEL_PCH_P2X_DEVICE_ID_TYPE) ||
 				   (id == INTEL_PCH_P3X_DEVICE_ID_TYPE) ||
 				   ((id == INTEL_PCH_QEMU_DEVICE_ID_TYPE) &&
-- 
2.1.4

Re: [PATCH] drm/i915: don't warn about Skylake CPU - KabyPoint PCH combo

[Vivi, Rodrigo]

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

> On Feb 1, 2017, at 5:46 AM, Nikula, Jani <jani.nikula@intel.com> wrote:
> 
> Apparently there are machines out there with Skylake CPU and KabyPoint
> PCH. Judging from our driver code, there doesn't seem to be any code
> paths that would do anything different between SunrisePoint and
> KabyPoint PCHs, so it would seem okay to accept the combo without
> warnings.
> 
> Fixes: 22dea0be50b2 ("drm/i915: Introduce Kabypoint PCH for Kabylake H/DT.")
> References: https://lists.freedesktop.org/archives/intel-gfx/2017-February/118611.html
> Reported-by: Rainer Koenig <Rainer.Koenig@ts.fujitsu.com>
> Cc: Rainer Koenig <Rainer.Koenig@ts.fujitsu.com>
> Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
> Cc: <stable@vger.kernel.org> # v4.8+
> Signed-off-by: Jani Nikula <jani.nikula@intel.com>
> ---
> drivers/gpu/drm/i915/i915_drv.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
> index 267d5f8c49e1..6a430648fa71 100644
> --- a/drivers/gpu/drm/i915/i915_drv.c
> +++ b/drivers/gpu/drm/i915/i915_drv.c
> @@ -213,7 +213,8 @@ static void intel_detect_pch(struct drm_i915_private *dev_priv)
>            } else if (id == INTEL_PCH_KBP_DEVICE_ID_TYPE) {
>                dev_priv->pch_type = PCH_KBP;
>                DRM_DEBUG_KMS("Found KabyPoint PCH\n");
> -                WARN_ON(!IS_KABYLAKE(dev_priv));
> +                WARN_ON(!IS_SKYLAKE(dev_priv) &&
> +                    !IS_KABYLAKE(dev_priv));
>            } else if ((id == INTEL_PCH_P2X_DEVICE_ID_TYPE) ||
>                   (id == INTEL_PCH_P3X_DEVICE_ID_TYPE) ||
>                   ((id == INTEL_PCH_QEMU_DEVICE_ID_TYPE) &&
> -- 
> 2.1.4
> 

Re: [PATCH] drm/i915: don't warn about Skylake CPU - KabyPoint PCH combo

[Jani Nikula]

On Wed, 01 Feb 2017, "Vivi, Rodrigo" <rodrigo.vivi@intel.com> wrote:
> Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

Pushed to drm-intel-next-queued, thanks for the review.

BR,
Jani.


>
>> On Feb 1, 2017, at 5:46 AM, Nikula, Jani <jani.nikula@intel.com> wrote:
>> 
>> Apparently there are machines out there with Skylake CPU and KabyPoint
>> PCH. Judging from our driver code, there doesn't seem to be any code
>> paths that would do anything different between SunrisePoint and
>> KabyPoint PCHs, so it would seem okay to accept the combo without
>> warnings.
>> 
>> Fixes: 22dea0be50b2 ("drm/i915: Introduce Kabypoint PCH for Kabylake H/DT.")
>> References: https://lists.freedesktop.org/archives/intel-gfx/2017-February/118611.html
>> Reported-by: Rainer Koenig <Rainer.Koenig@ts.fujitsu.com>
>> Cc: Rainer Koenig <Rainer.Koenig@ts.fujitsu.com>
>> Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
>> Cc: <stable@vger.kernel.org> # v4.8+
>> Signed-off-by: Jani Nikula <jani.nikula@intel.com>
>> ---
>> drivers/gpu/drm/i915/i915_drv.c | 3 ++-
>> 1 file changed, 2 insertions(+), 1 deletion(-)
>> 
>> diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
>> index 267d5f8c49e1..6a430648fa71 100644
>> --- a/drivers/gpu/drm/i915/i915_drv.c
>> +++ b/drivers/gpu/drm/i915/i915_drv.c
>> @@ -213,7 +213,8 @@ static void intel_detect_pch(struct drm_i915_private *dev_priv)
>>            } else if (id == INTEL_PCH_KBP_DEVICE_ID_TYPE) {
>>                dev_priv->pch_type = PCH_KBP;
>>                DRM_DEBUG_KMS("Found KabyPoint PCH\n");
>> -                WARN_ON(!IS_KABYLAKE(dev_priv));
>> +                WARN_ON(!IS_SKYLAKE(dev_priv) &&
>> +                    !IS_KABYLAKE(dev_priv));
>>            } else if ((id == INTEL_PCH_P2X_DEVICE_ID_TYPE) ||
>>                   (id == INTEL_PCH_P3X_DEVICE_ID_TYPE) ||
>>                   ((id == INTEL_PCH_QEMU_DEVICE_ID_TYPE) &&
>> -- 
>> 2.1.4
>> 

-- 
Jani Nikula, Intel Open Source Technology Center