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drm/i915/gsc: skip irq initialization if using polling

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Some platforms require the host to poll on the
GSC registers instead of relaying on the interrupts.
For those platforms, irq initialization should be skipped

Signed-off-by: Vitaly Lubart <vitaly.lubart@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220907215113.1596567-2-tomas.winkler@intel.com
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
This commit is contained in:
Vitaly Lubart 2022-09-08 00:50:58 +03:00 committed by Joonas Lahtinen
parent 04f7eb3d45
commit 5c4d2536cf
1 changed files with 7 additions and 3 deletions
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10
drivers/gpu/drm/i915/gt/intel_gsc.c
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@ -40,6 +40,7 @@ struct gsc_def {
const char *name;
unsigned long bar;
size_t bar_size;
bool use_polling;
};
/* gsc resources and definitions (HECI1 and HECI2) */
@ -117,6 +118,10 @@ static void gsc_init_one(struct drm_i915_private *i915,
return;
}
/* skip irq initialization */
if (def->use_polling)
goto add_device;
intf->irq = irq_alloc_desc(0);
if (intf->irq < 0) {
drm_err(&i915->drm, "gsc irq error %d\n", intf->irq);
@ -129,6 +134,7 @@ static void gsc_init_one(struct drm_i915_private *i915,
goto fail;
}
add_device:
adev = kzalloc(sizeof(*adev), GFP_KERNEL);
if (!adev)
goto fail;
@ -182,10 +188,8 @@ static void gsc_irq_handler(struct intel_gt *gt, unsigned int intf_id)
return;
}
if (gt->gsc.intf[intf_id].irq < 0) {
drm_err_ratelimited(&gt->i915->drm, "GSC irq: irq not set");
if (gt->gsc.intf[intf_id].irq < 0)
return;
}
ret = generic_handle_irq(gt->gsc.intf[intf_id].irq);
if (ret)