Re: [PATCH] drm/i915: stop using GMBUS IRQs on Gen4 chips (was Re: [3.9-rc1] irq 16: nobody cared (was [3.9-rc1] very poor interrupt responses))

On Mon, 18 Mar 2013, Chris Wilson wrote: +#define HAS_GMBUS_IRQ(dev) (INTEL_INFO(dev)-gen = 5) void intel_i2c_reset(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev-dev_private; I915_WRITE(dev_priv-gpio_mmio_base + GMBUS0, 0); -

Re: [PATCH] drm/i915: stop using GMBUS IRQs on Gen4 chips (was Re: [3.9-rc1] irq 16: nobody cared (was [3.9-rc1] very poor interrupt responses))

On Tue, Mar 19, 2013 at 09:56:57AM +0100, Jiri Kosina wrote: On Mon, 18 Mar 2013, Chris Wilson wrote: +#define HAS_GMBUS_IRQ(dev) (INTEL_INFO(dev)-gen = 5) void intel_i2c_reset(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev-dev_private;

gm45 intel gfx can generate non-MSI irq# in MSI mode (was Re: [PATCH] drm/i915: stop using GMBUS IRQs on Gen4 chips (was Re: [3.9-rc1] irq 16: nobody cared (was [3.9-rc1] very poor interrupt responses

On Tue, Mar 19, 2013 at 10:03 AM, Chris Wilson ch...@chris-wilson.co.uk wrote: How about just using: if (!HAS_GMBUS_IRQ(dev_priv-dev)) gmbus4_irq_en = 0; and the existing wait loop? I explicitly wanted to avoid touching GMBUS4 register, as the real cause of the failure is not clear.

Re: [PATCH] drm/i915: stop using GMBUS IRQs on Gen4 chips (was Re: [3.9-rc1] irq 16: nobody cared (was [3.9-rc1] very poor interrupt responses))

On Mon, Mar 18, 2013 at 04:56:02PM +0100, Jiri Kosina wrote: Okay, so I think that for 3.9 we want the patch below, and if eventually hardware root cause / workaround is found for GM45, we can have it merged later. From: Jiri Kosina jkos...@suse.cz Subject: [PATCH] drm/i915: stop