From: Daniel Vetter <daniel.vetter@xxxxxxxx>
We need to make sure we don't put garbage into the hw if dmc firmware
loading failed mid-thru.
Cc: Damien Lespiau <damien.lespiau@xxxxxxxxx>
Cc: Imre Deak <imre.deak@xxxxxxxxx>
Cc: Sunil Kamath <sunil.kamath@xxxxxxxxx>
Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx>
Signed-off-by: Animesh Manna <animesh.manna@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_drv.h | 2 +-
drivers/gpu/drm/i915/intel_csr.c | 3 +++
2 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 94cf79a..1117300 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -736,7 +736,7 @@ struct intel_uncore {
struct intel_csr {
const char *fw_path;
- __be32 *dmc_payload;
+ uint32_t *dmc_payload;
uint32_t dmc_fw_size;
uint32_t mmio_count;
uint32_t mmioaddr[8];
diff --git a/drivers/gpu/drm/i915/intel_csr.c b/drivers/gpu/drm/i915/intel_csr.c
index 0813ff2..56381cf 100644
--- a/drivers/gpu/drm/i915/intel_csr.c
+++ b/drivers/gpu/drm/i915/intel_csr.c
@@ -215,6 +215,9 @@ void intel_csr_load_program(struct drm_device *dev)
return;
}
+ if (!dev_priv->csr.dmc_payload)
+ return;
+
fw_size = dev_priv->csr.dmc_fw_size;
for (i = 0; i < fw_size; i++)
I915_WRITE(CSR_PROGRAM_BASE + i * 4, payload[i]);
--
2.0.2
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