From: Tvrtko Ursulin Date: Wed, 27 Sep 2017 16:41:38 +0000 (+0100) Subject: drm/i915: Allow optimized platform checks X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=ae7617f0ef1820be033eef93859a6bb6174a843f;p=openwrt%2Fstaging%2Fblogic.git 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 Cc: Jani Nikula Reviewed-by: Chris Wilson Acked-by: Jani Nikula Link: https://patchwork.freedesktop.org/patch/msgid/20170927164138.15474-1-tvrtko.ursulin@linux.intel.com --- diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index 7056bb299dc6..59ac9199b35d 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 4e2fcdd4ce9e..59fd4bceec7b 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)