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drm/i915/opregion: abstract didl and did2 getter and setter 

Make it easier to handle the extended didl. No functional changes.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Jani Nikula 2015-07-02 17:43:24 +03:00 committed by Daniel Vetter
parent b4fe8156a7
commit d5cbb22fcd
1 changed files with 39 additions and 11 deletions
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50
drivers/gpu/drm/i915/intel_opregion.c
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@ -628,6 +628,38 @@ static struct notifier_block intel_opregion_notifier = {
* (version 3)
*/
static u32 get_did(struct intel_opregion *opregion, int i)
{
u32 did;
if (i < ARRAY_SIZE(opregion->acpi->didl)) {
did = ioread32(&opregion->acpi->didl[i]);
} else {
i -= ARRAY_SIZE(opregion->acpi->didl);
if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2)))
return 0;
did = ioread32(&opregion->acpi->did2[i]);
}
return did;
}
static void set_did(struct intel_opregion *opregion, int i, u32 val)
{
if (i < ARRAY_SIZE(opregion->acpi->didl)) {
iowrite32(val, &opregion->acpi->didl[i]);
} else {
i -= ARRAY_SIZE(opregion->acpi->didl);
if (WARN_ON(i >= ARRAY_SIZE(opregion->acpi->did2)))
return;
iowrite32(val, &opregion->acpi->did2[i]);
}
}
static void intel_didl_outputs(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
@ -665,22 +697,19 @@ static void intel_didl_outputs(struct drm_device *dev)
DRM_DEBUG_KMS("More than 8 outputs detected via ACPI\n");
return;
}
status =
acpi_evaluate_integer(acpi_cdev->handle, "_ADR",
NULL, &device_id);
status = acpi_evaluate_integer(acpi_cdev->handle, "_ADR",
NULL, &device_id);
if (ACPI_SUCCESS(status)) {
if (!device_id)
goto blind_set;
iowrite32((u32)(device_id & 0x0f0f),
&opregion->acpi->didl[i]);
i++;
set_did(opregion, i++, (u32)(device_id & 0x0f0f));
}
}
end:
/* If fewer than 8 outputs, the list must be null terminated */
if (i < 8)
iowrite32(0, &opregion->acpi->didl[i]);
set_did(opregion, i, 0);
return;
blind_set:
@ -713,9 +742,8 @@ static void intel_didl_outputs(struct drm_device *dev)
output_type = ACPI_LVDS_OUTPUT;
break;
}
temp = ioread32(&opregion->acpi->didl[i]);
iowrite32(temp | (1<<31) | output_type | i,
&opregion->acpi->didl[i]);
temp = get_did(opregion, i);
set_did(opregion, i, temp | (1 << 31) | output_type | i);
i++;
}
goto end;
@ -735,7 +763,7 @@ static void intel_setup_cadls(struct drm_device *dev)
* display switching hotkeys. Just like DIDL, CADL is NULL-terminated if
* there are less than eight devices. */
do {
disp_id = ioread32(&opregion->acpi->didl[i]);
disp_id = get_did(opregion, i);
iowrite32(disp_id, &opregion->acpi->cadl[i]);
} while (++i < 8 && disp_id != 0);
}