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[DMC_REDESIGN_V2,09/14] drm/i915/gen9: Don't try to load garbage dmc firmware on resume

Message ID 1440588497-13954-10-git-send-email-animesh.manna@intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

Manna, Animesh Aug. 26, 2015, 11:28 a.m. UTC 
From: Daniel Vetter <daniel.vetter@intel.com>

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@intel.com>
Cc: Imre Deak <imre.deak@intel.com>
Cc: Sunil Kamath <sunil.kamath@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Signed-off-by: Animesh Manna <animesh.manna@intel.com>
---
 drivers/gpu/drm/i915/intel_csr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox

Patch

diff --git a/drivers/gpu/drm/i915/intel_csr.c b/drivers/gpu/drm/i915/intel_csr.c
index 9971794..9ed513c 100644
--- a/drivers/gpu/drm/i915/intel_csr.c
+++ b/drivers/gpu/drm/i915/intel_csr.c
@@ -208,7 +208,7 @@  void intel_csr_load_program(struct drm_device *dev)
 	 * This condition will help to check if csr address space is reset/
 	 * not loaded.
 	 */
-	if (I915_READ(CSR_PROGRAM_BASE))
+	if ((!dev_priv->csr.dmc_payload) || I915_READ(CSR_PROGRAM_BASE))
 		return;
 
 	fw_size = dev_priv->csr.dmc_fw_size;