[Intel-gfx] [PATCH 2/6] drm/i915/skl: Store and print the DMC firmware version we load

[Damien Lespiau]

That can be handy later on to tell which DMC firmware version the user
has, by just looking at the dmesg or a debugfs file.

Signed-off-by: Damien Lespiau <damien.lespiau at intel.com>
---
 drivers/gpu/drm/i915/i915_debugfs.c | 7 +++++++
 drivers/gpu/drm/i915/i915_drv.h     | 5 +++++
 drivers/gpu/drm/i915/intel_csr.c    | 8 +++++++-
 3 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index df35448..5dad2ac 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -2604,6 +2604,7 @@ static int i915_dmc_info(struct seq_file *m, void *unused)
 	struct drm_info_node *node = m->private;
 	struct drm_device *dev = node->minor->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct intel_csr *csr = &dev_priv->csr;
 	static const char *csr_state_str[] = { "unknown", "loaded", "error" };
 	enum csr_state csr_state;
 
@@ -2616,6 +2617,12 @@ static int i915_dmc_info(struct seq_file *m, void *unused)
 	csr_state = intel_csr_load_status_get(dev_priv);
 	seq_printf(m, "status: %s\n", csr_state_str[csr_state]);
 
+	if (csr_state != FW_LOADED)
+		return 0;
+
+	seq_printf(m, "version: %d.%d\n", CSR_VERSION_MAJOR(csr->version),
+		   CSR_VERSION_MINOR(csr->version));
+
 	return 0;
 }
 
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 051298e..e15cb56 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -730,6 +730,10 @@ struct intel_uncore {
 #define for_each_fw_domain(domain__, dev_priv__, i__) \
 	for_each_fw_domain_mask(domain__, FORCEWAKE_ALL, dev_priv__, i__)
 
+#define CSR_VERSION(major, minor)	((major) << 16 | (minor))
+#define CSR_VERSION_MAJOR(version)	((version) >> 16)
+#define CSR_VERSION_MINOR(version)	((version) & 0xffff)
+
 enum csr_state {
 	FW_UNINITIALIZED = 0,
 	FW_LOADED,
@@ -740,6 +744,7 @@ struct intel_csr {
 	const char *fw_path;
 	__be32 *dmc_payload;
 	uint32_t dmc_fw_size;
+	uint32_t version;
 	uint32_t mmio_count;
 	uint32_t mmioaddr[8];
 	uint32_t mmiodata[8];
diff --git a/drivers/gpu/drm/i915/intel_csr.c b/drivers/gpu/drm/i915/intel_csr.c
index 6d8a7bf..f83a2bf 100644
--- a/drivers/gpu/drm/i915/intel_csr.c
+++ b/drivers/gpu/drm/i915/intel_csr.c
@@ -300,6 +300,9 @@ static void finish_csr_load(const struct firmware *fw, void *context)
 			(css_header->header_len * 4));
 		goto out;
 	}
+
+	csr->version = css_header->version;
+
 	readcount += sizeof(struct intel_css_header);
 
 	/* Extract Package Header information*/
@@ -389,7 +392,10 @@ static void finish_csr_load(const struct firmware *fw, void *context)
 	intel_csr_load_program(dev);
 	fw_loaded = true;
 
-	DRM_DEBUG_KMS("Finished loading %s\n", dev_priv->csr.fw_path);
+	DRM_DEBUG_KMS("Finished loading %s (v%d.%d)\n", dev_priv->csr.fw_path,
+		      CSR_VERSION_MAJOR(csr->version),
+		      CSR_VERSION_MINOR(csr->version));
+
 out:
 	if (fw_loaded)
 		intel_runtime_pm_put(dev_priv);
-- 
2.1.0