[PATCH 06/15] drm/i915/display: Add debugfs support to avoid joiner

[Ankit Nautiyal <ankit.k.nautiyal@intel.com>]

Currently debugfs for joiner can take a value of 0->dont care and
2->join 2 pipes. Add option to force to use only 1 pipe.

If debugfs is set to 1, force to exactly one pipe (ie. no
joiner despite what the automagic logic is saying).

Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
---
 drivers/gpu/drm/i915/display/intel_display_debugfs.c | 2 ++
 drivers/gpu/drm/i915/display/intel_dp.c              | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
index 5775413c6763..85742400348f 100644
--- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c
+++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
@@ -1533,6 +1533,8 @@ static ssize_t i915_joiner_write(struct file *file,
 	switch (force_join_pipes) {
 	case 0:
 		fallthrough;
+	case 1:
+		fallthrough;
 	case 2:
 		connector->force_joined_pipes = force_join_pipes;
 		break;
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 96ad048b68cf..369829ea5a12 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -1288,6 +1288,8 @@ int intel_dp_compute_num_pipes(struct intel_dp *intel_dp,
 			       int hdisplay, int clock)
 {
 	switch (connector->force_joined_pipes) {
+	case 1:
+		fallthrough;
 	case 2:
 		return connector->force_joined_pipes;
 	default:
-- 
2.45.2