Use i915.dmc_firmware_path to override default firmware for the platform
and bypassing version checks.
Signed-off-by: Jani Nikula <jani.nik...@intel.com>
---
Untested.
---
drivers/gpu/drm/i915/i915_params.c | 3 +++
drivers/gpu/drm/i915/intel_csr.c | 9 +++++++--
2 files changed, 10 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_params.c
b/drivers/gpu/drm/i915/i915_params.c
index 3328147b4863..c11ad6d67fa9 100644
--- a/drivers/gpu/drm/i915/i915_params.c
+++ b/drivers/gpu/drm/i915/i915_params.c
@@ -171,6 +171,9 @@ i915_param_named_unsafe(guc_firmware_path, charp, 0400,
i915_param_named_unsafe(huc_firmware_path, charp, 0400,
"HuC firmware path to use instead of the default one");
+i915_param_named_unsafe(dmc_firmware_path, charp, 0400,
+ "DMC firmware path to use instead of the default one");
+
i915_param_named_unsafe(enable_dp_mst, bool, 0600,
"Enable multi-stream transport (MST) for new DisplayPort sinks.
(default: true)");
diff --git a/drivers/gpu/drm/i915/intel_csr.c b/drivers/gpu/drm/i915/intel_csr.c
index 77d8b3d483ca..82db376ec7e1 100644
--- a/drivers/gpu/drm/i915/intel_csr.c
+++ b/drivers/gpu/drm/i915/intel_csr.c
@@ -296,7 +296,10 @@ static uint32_t *parse_csr_fw(struct drm_i915_private
*dev_priv,
csr->version = css_header->version;
- if (IS_CANNONLAKE(dev_priv)) {
+ if (csr->fw_path == i915_modparams.dmc_firmware_path) {
+ /* Bypass version check for firmware override. */
+ required_version = csr->version;
+ } else if (IS_CANNONLAKE(dev_priv)) {
required_version = CNL_CSR_VERSION_REQUIRED;
} else if (IS_GEMINILAKE(dev_priv)) {
required_version = GLK_CSR_VERSION_REQUIRED;
@@ -451,7 +454,9 @@ void intel_csr_ucode_init(struct drm_i915_private *dev_priv)
if (!HAS_CSR(dev_priv))
return;
- if (IS_CANNONLAKE(dev_priv))
+ if (i915_modparams.dmc_firmware_path)
+ csr->fw_path = i915_modparams.dmc_firmware_path;
+ else if (IS_CANNONLAKE(dev_priv))
csr->fw_path = I915_CSR_CNL;
else if (IS_GEMINILAKE(dev_priv))
csr->fw_path = I915_CSR_GLK;
--
2.11.0
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