The current CSR loading code depends on the CSR program memory to be
cleared after boot. This is unfortunately not true on all hardware.
Instead make use of the FW_UNINITIALIZED state in init and check for
FW_LOADED to prevent init path from skipping the actual programming.
Signed-off-by: Patrik Jakobsson <patrik.jakobs...@linux.intel.com>
---
drivers/gpu/drm/i915/intel_csr.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/intel_csr.c b/drivers/gpu/drm/i915/intel_csr.c
index 9e530a7..0f7c49e 100644
--- a/drivers/gpu/drm/i915/intel_csr.c
+++ b/drivers/gpu/drm/i915/intel_csr.c
@@ -271,7 +271,7 @@ void intel_csr_load_program(struct drm_device *dev)
* Unfortunately the ACPI subsystem doesn't yet give us a way to
* differentiate this, hence figure it out with this hack.
*/
- if (I915_READ(CSR_PROGRAM(0)))
+ if (I915_READ(CSR_PROGRAM(0)) && dev_priv->csr.state == FW_LOADED)
return;
mutex_lock(&dev_priv->csr_lock);
@@ -425,6 +425,8 @@ void intel_csr_ucode_init(struct drm_device *dev)
struct intel_csr *csr = &dev_priv->csr;
int ret;
+ intel_csr_load_status_set(dev_priv, FW_UNINITIALIZED);
+
if (!HAS_CSR(dev))
return;
--
2.1.4
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