An output can be added as a clone of any other output(s) attached to a
pipe using igt_output_clone_pipe()

v5: Drop field out_fence_requested from struct igt_pipe (Brian Starkey)

Signed-off-by: Brian Starkey <brian.star...@arm.com>
---
 lib/igt_kms.c | 100 +++++++++++++++++++++++++++++++-------------------
 lib/igt_kms.h |   4 ++
 2 files changed, 66 insertions(+), 38 deletions(-)

diff --git a/lib/igt_kms.c b/lib/igt_kms.c
index 140db346..b85a0404 100644
--- a/lib/igt_kms.c
+++ b/lib/igt_kms.c
@@ -1765,6 +1765,17 @@ static void igt_display_log_shift(igt_display_t 
*display, int shift)
        igt_assert(display->log_shift >= 0);
 }
 
+static int igt_output_idx(igt_output_t *output)
+{
+       int i;
+
+       for (i = 0; i < output->display->n_outputs; i++)
+               if (&output->display->outputs[i] == output)
+                       return i;
+
+       return -1;
+}
+
 static void igt_output_refresh(igt_output_t *output)
 {
        igt_display_t *display = output->display;
@@ -2317,42 +2328,6 @@ void igt_display_fini(igt_display_t *display)
        display->planes = NULL;
 }
 
-static void igt_display_refresh(igt_display_t *display)
-{
-       igt_output_t *output;
-       int i;
-
-       unsigned long pipes_in_use = 0;
-
-       /* Check that two outputs aren't trying to use the same pipe */
-       for (i = 0; i < display->n_outputs; i++) {
-               output = &display->outputs[i];
-
-               if (output->pending_pipe != PIPE_NONE) {
-                       if (pipes_in_use & (1 << output->pending_pipe))
-                               goto report_dup;
-
-                       pipes_in_use |= 1 << output->pending_pipe;
-               }
-
-               if (output->force_reprobe)
-                       igt_output_refresh(output);
-       }
-
-       return;
-
-report_dup:
-       for (; i > 0; i--) {
-               igt_output_t *b = &display->outputs[i - 1];
-
-               igt_assert_f(output->pending_pipe !=
-                            b->pending_pipe,
-                            "%s and %s are both trying to use pipe %s\n",
-                            igt_output_name(output), igt_output_name(b),
-                            kmstest_pipe_name(output->pending_pipe));
-       }
-}
-
 static igt_pipe_t *igt_output_get_driving_pipe(igt_output_t *output)
 {
        igt_display_t *display = output->display;
@@ -2376,6 +2351,40 @@ static igt_pipe_t 
*igt_output_get_driving_pipe(igt_output_t *output)
        return &display->pipes[pipe];
 }
 
+static void igt_display_refresh(igt_display_t *display)
+{
+       igt_output_t *output;
+       igt_pipe_t *pipe;
+       int i;
+
+       unsigned long pipes_in_use = 0;
+       unsigned long pending_crtc_idx_mask;
+
+       /* Check that outputs and pipes agree wrt. cloning */
+       for (i = 0; i < display->n_outputs; i++) {
+               output = &display->outputs[i];
+               pending_crtc_idx_mask = 1 << output->pending_pipe;
+
+               pipe = igt_output_get_driving_pipe(output);
+               if (pipe) {
+                       igt_assert_f(pipe->outputs & (1 << 
igt_output_idx(output)),
+                                    "Output %s not expected to be using pipe 
%s\n",
+                                    igt_output_name(output),
+                                    kmstest_pipe_name(pipe->pipe));
+
+                       if (pipes_in_use & pending_crtc_idx_mask)
+                               LOG(display, "Output %s clones pipe %s\n",
+                                   igt_output_name(output),
+                                   kmstest_pipe_name(pipe->pipe));
+               }
+
+               pipes_in_use |= pending_crtc_idx_mask;
+
+               if (output->force_reprobe)
+                       igt_output_refresh(output);
+       }
+}
+
 static igt_plane_t *igt_pipe_get_plane(igt_pipe_t *pipe, int plane_idx)
 {
        igt_require_f(plane_idx >= 0 && plane_idx < pipe->n_planes,
@@ -3766,6 +3775,7 @@ void igt_output_override_mode(igt_output_t *output, const 
drmModeModeInfo *mode)
        output->use_override_mode = !!mode;
 
        if (pipe) {
+               igt_debug("overriding pipe mode in %s way\n", 
output->display->is_atomic ? "atomic" : "legacy");
                if (output->display->is_atomic)
                        igt_pipe_obj_replace_prop_blob(pipe, IGT_CRTC_MODE_ID, 
igt_output_get_mode(output), sizeof(*mode));
                else
@@ -3773,6 +3783,16 @@ void igt_output_override_mode(igt_output_t *output, 
const drmModeModeInfo *mode)
        }
 }
 
+void igt_output_clone_pipe(igt_output_t *output, enum pipe pipe)
+{
+       igt_display_t *display = output->display;
+       uint32_t current_clones = display->pipes[pipe].outputs;
+
+       igt_output_set_pipe(output, pipe);
+
+       display->pipes[pipe].outputs |= current_clones;
+}
+
 /*
  * igt_output_set_pipe:
  * @output: Target output for which the pipe is being set to
@@ -3789,11 +3809,15 @@ void igt_output_set_pipe(igt_output_t *output, enum 
pipe pipe)
 
        igt_assert(output->name);
 
-       if (output->pending_pipe != PIPE_NONE)
+       if (output->pending_pipe != PIPE_NONE) {
                old_pipe = igt_output_get_driving_pipe(output);
+               old_pipe->outputs &= ~(1 << igt_output_idx(output));
+       }
 
-       if (pipe != PIPE_NONE)
+       if (pipe != PIPE_NONE) {
                pipe_obj = &display->pipes[pipe];
+               pipe_obj->outputs = (1 << igt_output_idx(output));
+       }
 
        LOG(display, "%s: set_pipe(%s)\n", igt_output_name(output),
            kmstest_pipe_name(pipe));
diff --git a/lib/igt_kms.h b/lib/igt_kms.h
index cacc6b90..676839bb 100644
--- a/lib/igt_kms.h
+++ b/lib/igt_kms.h
@@ -354,6 +354,8 @@ struct igt_pipe {
        uint32_t crtc_id;
 
        int32_t out_fence_fd;
+
+       uint32_t outputs;
 };
 
 typedef struct {
@@ -411,6 +413,8 @@ const char *igt_output_name(igt_output_t *output);
 drmModeModeInfo *igt_output_get_mode(igt_output_t *output);
 void igt_output_override_mode(igt_output_t *output, const drmModeModeInfo 
*mode);
 void igt_output_set_pipe(igt_output_t *output, enum pipe pipe);
+void igt_output_clone_pipe(igt_output_t *output, enum pipe pipe);
+
 igt_plane_t *igt_output_get_plane(igt_output_t *output, int plane_idx);
 igt_plane_t *igt_output_get_plane_type(igt_output_t *output, int plane_type);
 int igt_output_count_plane_type(igt_output_t *output, int plane_type);
-- 
2.21.0

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