From: Stanislav Lisovskiy <stanislav.lisovs...@intel.com>
Add sanity checks for primary and secondary bigjoiner/uncompressed
bitmasks, should make it easier to spot possible issues.
v2:
-Streamline the expected masks and add few more drm_WARNs. (Ville)
-Use %#x format specifier for printing joiner masks. (Ville)
-Use struct intel_display instead of struct drm_i915_private. (Ankit)
v3:
-Rename helper to get expected uncompressed joiner pipes. (Ville)
Signed-off-by: Stanislav Lisovskiy <stanislav.lisovs...@intel.com>
Reviewed-by: Suraj Kandpal <suraj.kand...@intel.com> (v1)
Reviewed-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
---
drivers/gpu/drm/i915/display/intel_display.c | 51 +++++++++++++++++++-
1 file changed, 49 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_display.c
b/drivers/gpu/drm/i915/display/intel_display.c
index 8d37973864ee..2d6260c3bca5 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -3643,26 +3643,73 @@ static void enabled_bigjoiner_pipes(struct
intel_display *display,
}
}
+static u8 expected_secondary_pipes(u8 primary_pipes, int num_pipes)
+{
+ u8 secondary_pipes = 0;
+
+ for (int i = 1; i < num_pipes; i++)
+ secondary_pipes |= primary_pipes << i;
+
+ return secondary_pipes;
+}
+
+static u8 expected_uncompressed_joiner_secondary_pipes(u8
uncompjoiner_primary_pipes)
+{
+ return expected_secondary_pipes(uncompjoiner_primary_pipes, 2);
+}
+
+static u8 expected_bigjoiner_secondary_pipes(u8 bigjoiner_primary_pipes)
+{
+ return expected_secondary_pipes(bigjoiner_primary_pipes, 2);
+}
+
static void enabled_joiner_pipes(struct drm_i915_private *dev_priv,
u8 *primary_pipes, u8 *secondary_pipes)
{
struct intel_display *display = to_intel_display(&dev_priv->drm);
u8 primary_uncompressed_joiner_pipes, primary_bigjoiner_pipes;
u8 secondary_uncompressed_joiner_pipes, secondary_bigjoiner_pipes;
+ u8 uncompressed_joiner_pipes, bigjoiner_pipes;
enabled_uncompressed_joiner_pipes(display,
&primary_uncompressed_joiner_pipes,
&secondary_uncompressed_joiner_pipes);
+ drm_WARN_ON(display->drm,
+ (primary_uncompressed_joiner_pipes &
secondary_uncompressed_joiner_pipes) != 0);
+
enabled_bigjoiner_pipes(display, &primary_bigjoiner_pipes,
&secondary_bigjoiner_pipes);
+ drm_WARN_ON(display->drm,
+ (primary_bigjoiner_pipes & secondary_bigjoiner_pipes) != 0);
+
+ uncompressed_joiner_pipes = primary_uncompressed_joiner_pipes |
+ secondary_uncompressed_joiner_pipes;
+ bigjoiner_pipes = primary_bigjoiner_pipes | secondary_bigjoiner_pipes;
+
+ drm_WARN(display->drm, (uncompressed_joiner_pipes & bigjoiner_pipes) !=
0,
+ "Uncomressed joiner pipes(%#x) and bigjoiner pipes(%#x) can't
intersect\n",
+ uncompressed_joiner_pipes, bigjoiner_pipes);
+
+ drm_WARN(display->drm, secondary_bigjoiner_pipes !=
+ expected_bigjoiner_secondary_pipes(primary_bigjoiner_pipes),
+ "Wrong secondary bigjoiner pipes(expected %#x, current %#x)\n",
+ expected_bigjoiner_secondary_pipes(primary_bigjoiner_pipes),
+ secondary_bigjoiner_pipes);
+
+ drm_WARN(display->drm, secondary_uncompressed_joiner_pipes !=
+
expected_uncompressed_joiner_secondary_pipes(primary_uncompressed_joiner_pipes),
+ "Wrong secondary uncompressed joiner pipes(expected %#x,
current %#x)\n",
+
expected_uncompressed_joiner_secondary_pipes(primary_uncompressed_joiner_pipes),
+ secondary_uncompressed_joiner_pipes);
+
*primary_pipes = primary_uncompressed_joiner_pipes |
primary_bigjoiner_pipes;
*secondary_pipes = secondary_uncompressed_joiner_pipes |
secondary_bigjoiner_pipes;
/* Joiner pipes should always be consecutive primary and secondary */
- drm_WARN(&dev_priv->drm, *secondary_pipes != *primary_pipes << 1,
- "Joiner misconfigured (primary pipes 0x%x, secondary pipes
0x%x)\n",
+ drm_WARN(display->drm, *secondary_pipes != *primary_pipes << 1,
+ "Joiner misconfigured (primary pipes %#x, secondary pipes
%#x)\n",
*primary_pipes, *secondary_pipes);
}
--
2.45.2
