From: Damien Lespiau <damien.lespiau@xxxxxxxxx>
The CSR firmware expose two counters, handy to check if we are indeed
entering DC5/DC6.
v2: Rebase
v3: Take RPM ref before reading (Imre)
Signed-off-by: Damien Lespiau <damien.lespiau@xxxxxxxxx>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx> (v1)
Signed-off-by: Mika Kuoppala <mika.kuoppala@xxxxxxxxx>
Reviewed-by: Imre Deak <imre.deak@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_debugfs.c | 11 +++++++++++
drivers/gpu/drm/i915/i915_reg.h | 4 ++++
2 files changed, 15 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 4ed2797..c30580b 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -2810,6 +2810,17 @@ static int i915_dmc_info(struct seq_file *m, void *unused)
seq_printf(m, "version: %d.%d\n", CSR_VERSION_MAJOR(csr->version),
CSR_VERSION_MINOR(csr->version));
+ intel_runtime_pm_get(dev_priv);
+
+ if (IS_SKYLAKE(dev) && csr->version >= CSR_VERSION(1, 6)) {
+ seq_printf(m, "DC3 -> DC5 count: %d\n",
+ I915_READ(SKL_CSR_DC3_DC5_COUNT));
+ seq_printf(m, "DC5 -> DC6 count: %d\n",
+ I915_READ(SKL_CSR_DC5_DC6_COUNT));
+ }
+
+ intel_runtime_pm_put(dev_priv);
+
return 0;
}
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 8942532..bf9bddd 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -5696,6 +5696,10 @@ enum skl_disp_power_wells {
#define GAMMA_MODE_MODE_12BIT (2 << 0)
#define GAMMA_MODE_MODE_SPLIT (3 << 0)
+/* DMC/CSR */
+#define SKL_CSR_DC3_DC5_COUNT 0x80030
+#define SKL_CSR_DC5_DC6_COUNT 0x8002C
+
/* interrupts */
#define DE_MASTER_IRQ_CONTROL (1 << 31)
#define DE_SPRITEB_FLIP_DONE (1 << 29)
--
2.5.0
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