diff options
| -rw-r--r-- | drivers/gpu/drm/i915/i915_reg.h | 3 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_uncore.c | 43 |
2 files changed, 45 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index c154a7b732cd..64caa470f2c6 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -1461,6 +1461,9 @@ enum skl_disp_power_wells { #define RING_MAX_IDLE(base) ((base)+0x54) #define RING_HWS_PGA(base) ((base)+0x80) #define RING_HWS_PGA_GEN6(base) ((base)+0x2080) +#define RING_RESET_CTL(base) ((base)+0xd0) +#define RESET_CTL_REQUEST_RESET (1 << 0) +#define RESET_CTL_READY_TO_RESET (1 << 1) #define HSW_GTT_CACHE_EN 0x4024 #define GTT_CACHE_EN_ALL 0xF0007FFF diff --git a/drivers/gpu/drm/i915/intel_uncore.c b/drivers/gpu/drm/i915/intel_uncore.c index 4a86cf007aa0..160a47a9bdd9 100644 --- a/drivers/gpu/drm/i915/intel_uncore.c +++ b/drivers/gpu/drm/i915/intel_uncore.c @@ -1455,9 +1455,50 @@ static int gen6_do_reset(struct drm_device *dev) return ret; } +static int wait_for_register(struct drm_i915_private *dev_priv, + const u32 reg, + const u32 mask, + const u32 value, + const unsigned long timeout_ms) +{ + return wait_for((I915_READ(reg) & mask) == value, timeout_ms); +} + +static int gen8_do_reset(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + struct intel_engine_cs *engine; + int i; + + for_each_ring(engine, dev_priv, i) { + I915_WRITE(RING_RESET_CTL(engine->mmio_base), + _MASKED_BIT_ENABLE(RESET_CTL_REQUEST_RESET)); + + if (wait_for_register(dev_priv, + RING_RESET_CTL(engine->mmio_base), + RESET_CTL_READY_TO_RESET, + RESET_CTL_READY_TO_RESET, + 700)) { + DRM_ERROR("%s: reset request timeout\n", engine->name); + goto not_ready; + } + } + + return gen6_do_reset(dev); + +not_ready: + for_each_ring(engine, dev_priv, i) + I915_WRITE(RING_RESET_CTL(engine->mmio_base), + _MASKED_BIT_DISABLE(RESET_CTL_REQUEST_RESET)); + + return -EIO; +} + static int (*intel_get_gpu_reset(struct drm_device *dev))(struct drm_device *) { - if (INTEL_INFO(dev)->gen >= 6) + if (INTEL_INFO(dev)->gen >= 8) + return gen8_do_reset; + else if (INTEL_INFO(dev)->gen >= 6) return gen6_do_reset; else if (IS_GEN5(dev)) return ironlake_do_reset; |