[linux-yocto] [4.12][PATCH] drm/i915/cfl: Coffee Lake works on Kaby Lake PCH.

[Bruce Ashfield]

On 2018-03-05 4:01 AM, Liwei Song wrote:
> For linux-yocto-4.12

merged to standard/base -> BSPs.

Bruce

> 
> Thanks,
> Liwei.
> 
> On 03/05/2018 04:53 PM, Liwei Song wrote:
>> From: Rodrigo Vivi <rodrigo.vivi at intel.com>
>>
>> commit eb371933cf4d3495d0899880b2e0e252ce9db517 upstream.
>>
>> Coffee Lake CPU on Kaby Lake PCH is possible.
>> It does exist, and it does work.
>>
>> The only missed case was this warning here noticed
>> by Wendy who could get one system with this configuration
>> and reported the issue for us:
>>
>> Hardware Configuration
>> Board ID KBL S DDR4 UDIMM EV CRB
>> Processor    Intel® Processor code named Coffee Lake S, (6+2), 6 cores 12 threads, GT2, A0 (Internal) (QNJ4)
>>
>> [ 3.220585] WARNING: CPU: 10 PID: 206 at drivers/gpu/drm/i915/i915_drv.c:340 i915_driver_load+0x1210/0x1660 [i915]
>> [ 3.221312] Modules linked in: hid_generic usbhid i915 i2c_algo_bit drm_kms_helper e1000e syscopyarea sysfillrect sysimgblt nvme fb_sys_fops ptp ahci i2c_hid drm pps_core nvme_core libahci wmi hid video
>> [ 3.222050] CPU: 10 PID: 206 Comm: systemd-udevd Not tainted 4.13.0-rc5-intel-next+ #1
>> [ 3.222706] Hardware name: Intel Corporation Kabylake Client platform/KBL S DDR4 UDIMM EV CRB, BIOS KBLSE2R1.R00.X089.P00.1705051000 05/05/2017
>>
>> Cc: Wendy Wang <wendy.wang at intel.com>
>> Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan at intel.com>
>> Signed-off-by: Rodrigo Vivi <rodrigo.vivi at intel.com>
>> Reviewed-by: Dhinakaran Pandiyan <dhinakaran.pandiyan at intel.com>
>> Link: https://patchwork.freedesktop.org/patch/msgid/20170821235056.9015-1-rodrigo.vivi@intel.com
>> Signed-off-by: Liwei Song <liwei.song at windriver.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 19ffb3439fa9..bb7a4d92db60 100644
>> --- a/drivers/gpu/drm/i915/i915_drv.c
>> +++ b/drivers/gpu/drm/i915/i915_drv.c
>> @@ -221,7 +221,8 @@ static void intel_detect_pch(struct drm_i915_private *dev_priv)
>>   				dev_priv->pch_type = PCH_KBP;
>>   				DRM_DEBUG_KMS("Found KabyPoint PCH\n");
>>   				WARN_ON(!IS_SKYLAKE(dev_priv) &&
>> -					!IS_KABYLAKE(dev_priv));
>> +					!IS_KABYLAKE(dev_priv) &&
>> +					!IS_COFFEELAKE(dev_priv));
>>   			} else if (id == INTEL_PCH_CNP_DEVICE_ID_TYPE) {
>>   				dev_priv->pch_type = PCH_CNP;
>>   				DRM_DEBUG_KMS("Found CannonPoint PCH\n");
>>