From: Ville Syrjälä Date: Tue, 12 Jul 2016 16:24:47 +0000 (+0300) Subject: drm/i915: Unbreak interrupts on pre-gen6 X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=b224c4dc70cdd5f42d24a7057148c6ace90e4f4e;p=openwrt%2Fstaging%2Fblogic.git drm/i915: Unbreak interrupts on pre-gen6 Prior to gen6 we didn't have per-ring IMR registers, which means that since commit 61ff75ac20ff ("drm/i915: Simplify enabling user-interrupts with L3-remapping") we're now masking off all interrupts when init_render_ring() gets called. That's rather rude. Let's limit the ring IMR frobbing to machines that actually have the per-ring IMR registers. Cc: Chris Wilson Cc: Tvrtko Ursulin Fixes: 61ff75ac20ff ("drm/i915: Simplify enabling user-interrupts with L3-remapping") Signed-off-by: Ville Syrjälä Link: http://patchwork.freedesktop.org/patch/msgid/1468340687-3596-1-git-send-email-ville.syrjala@linux.intel.com Reviewd-by: Chris Wilson (cherry picked from commit 035ea405c91e2dc89325a79129cf9af2b9c2ae8e) Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c index 61e00bf9e87f..c8e77c082b21 100644 --- a/drivers/gpu/drm/i915/intel_ringbuffer.c +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c @@ -1305,7 +1305,8 @@ static int init_render_ring(struct intel_engine_cs *engine) if (IS_GEN(dev_priv, 6, 7)) I915_WRITE(INSTPM, _MASKED_BIT_ENABLE(INSTPM_FORCE_ORDERING)); - I915_WRITE_IMR(engine, ~engine->irq_keep_mask); + if (INTEL_INFO(dev_priv)->gen >= 6) + I915_WRITE_IMR(engine, ~engine->irq_keep_mask); return init_workarounds_ring(engine); }