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| author | Tvrtko Ursulin <tvrtko.ursulin@intel.com> | 2017-09-27 17:41:38 +0100 |
|---|---|---|
| committer | Tvrtko Ursulin <tvrtko.ursulin@intel.com> | 2017-09-28 12:47:19 +0100 |
| commit | ae7617f0ef1820be033eef93859a6bb6174a843f (patch) | |
| tree | eec0c1ba6a1879ea45a5f3d31667d5c4f90aee2c | |
| parent | bd30ca2d1a98fb9bd1f6ba63438068788b9e396b (diff) | |
| download | op-kernel-dev-ae7617f0ef1820be033eef93859a6bb6174a843f.zip op-kernel-dev-ae7617f0ef1820be033eef93859a6bb6174a843f.tar.gz | |
drm/i915: Allow optimized platform checks
If we store the platform as a bitmask, and convert the
IS_PLATFORM macro to use it, we allow the compiler to
merge the IS_PLATFORM(a) || IS_PLATFORM(b) || ... checks
into a single conditional.
As a secondary benefit this saves almost 1k of text:
text data bss dec hex filename
-1460254 60014 3656 1523924 1740d4 drivers/gpu/drm/i915/i915.ko
+1459260 60026 3656 1522942 173cfe drivers/gpu/drm/i915/i915.ko
v2: Removed the infamous -1.
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170927164138.15474-1-tvrtko.ursulin@linux.intel.com
| -rw-r--r-- | drivers/gpu/drm/i915/i915_drv.c | 4 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_drv.h | 3 |
2 files changed, 6 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index 7056bb2..59ac919 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -870,6 +870,10 @@ static int i915_driver_init_early(struct drm_i915_private *dev_priv, memcpy(device_info, match_info, sizeof(*device_info)); device_info->device_id = dev_priv->drm.pdev->device; + BUILD_BUG_ON(INTEL_MAX_PLATFORMS > + sizeof(device_info->platform_mask) * BITS_PER_BYTE); + device_info->platform_mask = BIT(device_info->platform); + BUG_ON(device_info->gen > sizeof(device_info->gen_mask) * BITS_PER_BYTE); device_info->gen_mask = BIT(device_info->gen - 1); diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 4e2fcdd..59fd4bc 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -861,6 +861,7 @@ struct intel_device_info { u8 ring_mask; /* Rings supported by the HW */ enum intel_platform platform; + u32 platform_mask; u32 display_mmio_offset; @@ -2913,7 +2914,7 @@ intel_info(const struct drm_i915_private *dev_priv) #define IS_REVID(p, since, until) \ (INTEL_REVID(p) >= (since) && INTEL_REVID(p) <= (until)) -#define IS_PLATFORM(dev_priv, p) ((dev_priv)->info.platform == (p)) +#define IS_PLATFORM(dev_priv, p) ((dev_priv)->info.platform_mask & BIT(p)) #define IS_I830(dev_priv) IS_PLATFORM(dev_priv, INTEL_I830) #define IS_I845G(dev_priv) IS_PLATFORM(dev_priv, INTEL_I845G) |
