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drm/i915: add generic __to_intel_display()

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Add generic __to_intel_display() macro that accepts either struct
drm_i915_private * or struct intel_display *. This is to be used for
transitional stuff that eventually needs to be converted to use struct
intel_display *, and therefore is not part of to_intel_display().

Add new intel_display_conversion.h to host the helper to avoid
duplication between xe and i915 drivers.

v2: put it in the new header (Rodrigo)

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/a999ff8183659a4df68d439ebd31c19b5c56852a.1713358679.git.jani.nikula@intel.com
This commit is contained in:
Jani Nikula 2024-04-17 16:02:41 +03:00
parent 8d7077f53e
commit 98ebb7cf94
1 changed files with 22 additions and 0 deletions
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22
drivers/gpu/drm/i915/display/intel_display_conversion.h Normal file
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/* SPDX-License-Identifier: MIT */
/* Copyright © 2024 Intel Corporation */
/*
* This header is for transitional struct intel_display conversion helpers only.
*/
#ifndef __INTEL_DISPLAY_CONVERSION__
#define __INTEL_DISPLAY_CONVERSION__
/*
* Transitional macro to optionally convert struct drm_i915_private * to struct
* intel_display *, also accepting the latter.
*/
#define __to_intel_display(p) \
_Generic(p, \
const struct drm_i915_private *: (&((const struct drm_i915_private *)(p))->display), \
struct drm_i915_private *: (&((struct drm_i915_private *)(p))->display), \
const struct intel_display *: (p), \
struct intel_display *: (p))
#endif /* __INTEL_DISPLAY_CONVERSION__ */