[PATCH 2/2] drm/i915: disable fbc due to Wa_16023588340

[Matthew Auld]

On 26/06/2024 16:55, Rodrigo Vivi wrote:
> On Wed, Jun 26, 2024 at 04:14:02PM +0100, Matthew Auld wrote:
>> On 25/06/2024 09:09, Matthew Auld wrote:
>>> On 19/06/2024 15:31, Matthew Auld wrote:
>>>> On BMG-G21 we need to disable fbc due to complications around the WA.
>>>>
>>>> Signed-off-by: Matthew Auld <matthew.auld at intel.com>
>>>> Cc: Jonathan Cavitt <jonathan.cavitt at intel.com>
>>>> Cc: Matt Roper <matthew.d.roper at intel.com>
>>>> Cc: Lucas De Marchi <lucas.demarchi at intel.com>
>>>> Cc: Vinod Govindapillai <vinod.govindapillai at intel.com>
>>>> Cc: intel-gfx at lists.freedesktop.org
>>> Can this be merged via drm-xe-next? The first patch is the xe centric
>>> part of the WA, but here this is touching i915 display and xe.
>>
>> Ping? Can this be landed via drm-xe-next? Lucas, Jani?
> 
> I'm afraid this patch-2 only submission to intel-gfx didn't trigger
> the i915 CI. probably good to submit the entire series to both mailing
> lists so we get both CIs?

Yes, I missed that.

> 
>>
>>>
>>>> ---
>>>>    drivers/gpu/drm/i915/display/intel_display_wa.h |  8 ++++++++
>>>>    drivers/gpu/drm/i915/display/intel_fbc.c        |  6 ++++++
>>>>    drivers/gpu/drm/xe/Makefile                     |  4 +++-
>>>>    drivers/gpu/drm/xe/display/xe_display_wa.c      | 16 ++++++++++++++++
>>>>    4 files changed, 33 insertions(+), 1 deletion(-)
>>>>    create mode 100644 drivers/gpu/drm/xe/display/xe_display_wa.c
>>>>
>>>> diff --git a/drivers/gpu/drm/i915/display/intel_display_wa.h
>>>> b/drivers/gpu/drm/i915/display/intel_display_wa.h
>>>> index 63201d09852c..be644ab6ae00 100644
>>>> --- a/drivers/gpu/drm/i915/display/intel_display_wa.h
>>>> +++ b/drivers/gpu/drm/i915/display/intel_display_wa.h
>>>> @@ -6,8 +6,16 @@
>>>>    #ifndef __INTEL_DISPLAY_WA_H__
>>>>    #define __INTEL_DISPLAY_WA_H__
>>>> +#include <linux/types.h>
>>>> +
>>>>    struct drm_i915_private;
>>>>    void intel_display_wa_apply(struct drm_i915_private *i915);
>>>> +#ifdef I915
>>>> +static inline bool intel_display_needs_wa_16023588340(struct
>>>> drm_i915_private *i915) { return false; }
>>>> +#else
>>>> +bool intel_display_needs_wa_16023588340(struct drm_i915_private *i915);
>>>> +#endif
>>>> +
>>>>    #endif
>>>> diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c
>>>> b/drivers/gpu/drm/i915/display/intel_fbc.c
>>>> index 67116c9f1464..8488f82143a4 100644
>>>> --- a/drivers/gpu/drm/i915/display/intel_fbc.c
>>>> +++ b/drivers/gpu/drm/i915/display/intel_fbc.c
>>>> @@ -56,6 +56,7 @@
>>>>    #include "intel_display_device.h"
>>>>    #include "intel_display_trace.h"
>>>>    #include "intel_display_types.h"
>>>> +#include "intel_display_wa.h"
>>>>    #include "intel_fbc.h"
>>>>    #include "intel_fbc_regs.h"
>>>>    #include "intel_frontbuffer.h"
>>>> @@ -1237,6 +1238,11 @@ static int intel_fbc_check_plane(struct
>>>> intel_atomic_state *state,
>>>>            return 0;
>>>>        }
>>>> +    if (intel_display_needs_wa_16023588340(i915)) {
>>>> +        plane_state->no_fbc_reason = "Wa_16023588340";
>>>> +        return 0;
>>>> +    }
>>>> +
>>>>        /* WaFbcTurnOffFbcWhenHyperVisorIsUsed:skl,bxt */
>>>>        if (i915_vtd_active(i915) && (IS_SKYLAKE(i915) ||
>>>> IS_BROXTON(i915))) {
>>>>            plane_state->no_fbc_reason = "VT-d enabled";
>>>> diff --git a/drivers/gpu/drm/xe/Makefile b/drivers/gpu/drm/xe/Makefile
>>>> index 0e16e5029081..f7521fd5db4c 100644
>>>> --- a/drivers/gpu/drm/xe/Makefile
>>>> +++ b/drivers/gpu/drm/xe/Makefile
>>>> @@ -34,7 +34,8 @@ uses_generated_oob := \
>>>>        $(obj)/xe_ring_ops.o \
>>>>        $(obj)/xe_vm.o \
>>>>        $(obj)/xe_wa.o \
>>>> -    $(obj)/xe_ttm_stolen_mgr.o
>>>> +    $(obj)/xe_ttm_stolen_mgr.o \
>>>> +    $(obj)/display/xe_display_wa.o \
>>>>    $(uses_generated_oob): $(generated_oob)
>>>> @@ -192,6 +193,7 @@ xe-$(CONFIG_DRM_XE_DISPLAY) += \
>>>>        display/xe_display.o \
>>>>        display/xe_display_misc.o \
>>>>        display/xe_display_rps.o \
>>>> +    display/xe_display_wa.o \
>>>>        display/xe_dsb_buffer.o \
>>>>        display/xe_fb_pin.o \
>>>>        display/xe_hdcp_gsc.o \
>>>> diff --git a/drivers/gpu/drm/xe/display/xe_display_wa.c
>>>> b/drivers/gpu/drm/xe/display/xe_display_wa.c
>>>> new file mode 100644
>>>> index 000000000000..68e3d1959ad6
>>>> --- /dev/null
>>>> +++ b/drivers/gpu/drm/xe/display/xe_display_wa.c
>>>> @@ -0,0 +1,16 @@
>>>> +// SPDX-License-Identifier: MIT
>>>> +/*
>>>> + * Copyright © 2024 Intel Corporation
>>>> + */
>>>> +
>>>> +#include "intel_display_wa.h"
>>>> +
>>>> +#include "xe_device.h"
>>>> +#include "xe_wa.h"
>>>> +
>>>> +#include <generated/xe_wa_oob.h>
>>>> +
>>>> +bool intel_display_needs_wa_16023588340(struct drm_i915_private *i915)
>>>> +{
>>>> +    return XE_WA(xe_root_mmio_gt(i915), 16023588340);
>>>> +}