In some cases to enable or disable features & workarounds, we may need
to check the GPU stepping. Add a macro to do that based on caching the
PCI revision ID reg.
Signed-off-by: Jesse Barnes <jbar...@virtuousgeek.org>
---
drivers/gpu/drm/i915/i915_dma.c | 2 ++
drivers/gpu/drm/i915/i915_drv.h | 2 ++
2 files changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index dea455b..9bcbbf2 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -1565,6 +1565,8 @@ int i915_driver_load(struct drm_device *dev, unsigned
long flags)
device_info = (struct intel_device_info *)&dev_priv->info;
*device_info = *info;
+ pci_read_config_byte(dev->pdev, PCI_REVISION_ID, &dev_priv->stepping);
+
spin_lock_init(&dev_priv->irq_lock);
spin_lock_init(&dev_priv->gpu_error.lock);
spin_lock_init(&dev_priv->backlight_lock);
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 5d5e57d..22d57b8 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -1341,6 +1341,7 @@ struct drm_i915_private {
struct kmem_cache *slab;
const struct intel_device_info info;
+ u8 stepping;
int relative_constants_mode;
@@ -1867,6 +1868,7 @@ struct drm_i915_cmd_table {
};
#define INTEL_INFO(dev) (&to_i915(dev)->info)
+#define INTEL_STEPPING(dev) (&to_i915(dev)->stepping)
#define IS_I830(dev) ((dev)->pdev->device == 0x3577)
#define IS_845G(dev) ((dev)->pdev->device == 0x2562)
--
1.8.4.2
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