Signed-off-by: Rob Clark <robdclark at gmail.com>
---
 drivers/gpu/drm/drm_atomic.c | 93 ++++++++++++++++++++++++++++++++++++++++++++
 include/drm/drmP.h           |  1 +
 include/drm/drm_crtc.h       | 37 ++++++++++++++++++
 3 files changed, 131 insertions(+)

diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index 7ebf375..3cc3cb5 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -30,6 +30,7 @@
 #include <drm/drm_atomic.h>
 #include <drm/drm_mode.h>
 #include <drm/drm_plane_helper.h>
+#include <drm/drm_print.h>
 #include <linux/sync_file.h>

 #include "drm_crtc_internal.h"
@@ -608,6 +609,28 @@ static int drm_atomic_crtc_check(struct drm_crtc *crtc,
        return 0;
 }

+static void drm_atomic_crtc_print_state(struct drm_print *p,
+               const struct drm_crtc_state *state)
+{
+       struct drm_crtc *crtc = state->crtc;
+
+       drm_printf(p, "crtc[%u]: %s\n", crtc->base.id, crtc->name);
+       drm_printf(p, "\tenable=%d\n", state->enable);
+       drm_printf(p, "\tactive=%d\n", state->active);
+       drm_printf(p, "\tplanes_changed=%d\n", state->planes_changed);
+       drm_printf(p, "\tmode_changed=%d\n", state->mode_changed);
+       drm_printf(p, "\tactive_changed=%d\n", state->active_changed);
+       drm_printf(p, "\tconnectors_changed=%d\n", state->connectors_changed);
+       drm_printf(p, "\tcolor_mgmt_changed=%d\n", state->color_mgmt_changed);
+       drm_printf(p, "\tplane_mask=%x\n", state->plane_mask);
+       drm_printf(p, "\tconnector_mask=%x\n", state->connector_mask);
+       drm_printf(p, "\tencoder_mask=%x\n", state->encoder_mask);
+       drm_printf(p, "\tmode: " DRM_MODE_FMT "\n", DRM_MODE_ARG(&state->mode));
+
+       if (crtc->funcs->atomic_print_state)
+               crtc->funcs->atomic_print_state(p, state);
+}
+
 /**
  * drm_atomic_get_plane_state - get plane state
  * @state: global atomic state object
@@ -895,6 +918,38 @@ static int drm_atomic_plane_check(struct drm_plane *plane,
        return 0;
 }

+static void drm_atomic_plane_print_state(struct drm_print *p,
+               const struct drm_plane_state *state)
+{
+       struct drm_plane *plane = state->plane;
+       struct drm_rect src  = drm_plane_state_src(state);
+       struct drm_rect dest = drm_plane_state_dest(state);
+
+       drm_printf(p, "plane[%u]: %s\n", plane->base.id, plane->name);
+       drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : 
"(null)");
+       drm_printf(p, "\tfb=%u\n", state->fb ? state->fb->base.id : 0);
+       if (state->fb) {
+               struct drm_framebuffer *fb = state->fb;
+               int i, n = drm_format_num_planes(fb->pixel_format);
+
+               drm_printf(p, "\t\tformat=%s\n",
+                               drm_get_format_name(fb->pixel_format));
+               drm_printf(p, "\t\tsize=%dx%d\n", fb->width, fb->height);
+               drm_printf(p, "\t\tlayers:\n");
+               for (i = 0; i < n; i++) {
+                       drm_printf(p, "\t\t\tpitch[%d]=%u\n", i, 
fb->pitches[i]);
+                       drm_printf(p, "\t\t\toffset[%d]=%u\n", i, 
fb->offsets[i]);
+                       drm_printf(p, "\t\t\tmodifier[%d]=0x%llx\n", i, 
fb->modifier[i]);
+               }
+       }
+       drm_printf(p, "\tcrtc-pos=" DRM_RECT_FMT "\n", DRM_RECT_ARG(&dest));
+       drm_printf(p, "\tsrc-pos=" DRM_RECT_FP_FMT "\n", DRM_RECT_FP_ARG(&src));
+       drm_printf(p, "\trotation=%x\n", state->rotation);
+
+       if (plane->funcs->atomic_print_state)
+               plane->funcs->atomic_print_state(p, state);
+}
+
 /**
  * drm_atomic_get_connector_state - get connector state
  * @state: global atomic state object
@@ -1010,6 +1065,18 @@ int drm_atomic_connector_set_property(struct 
drm_connector *connector,
 }
 EXPORT_SYMBOL(drm_atomic_connector_set_property);

+static void drm_atomic_connector_print_state(struct drm_print *p,
+               const struct drm_connector_state *state)
+{
+       struct drm_connector *connector = state->connector;
+
+       drm_printf(p, "connector[%u]: %s\n", connector->base.id, 
connector->name);
+       drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : 
"(null)");
+
+       if (connector->funcs->atomic_print_state)
+               connector->funcs->atomic_print_state(p, state);
+}
+
 /**
  * drm_atomic_connector_get_property - get property value from connector state
  * @connector: the drm connector to set a property on
@@ -1475,6 +1542,29 @@ int drm_atomic_nonblocking_commit(struct 
drm_atomic_state *state)
 }
 EXPORT_SYMBOL(drm_atomic_nonblocking_commit);

+static void drm_atomic_print_state(const struct drm_atomic_state *state)
+{
+       struct drm_print p = drm_print_info();
+       struct drm_plane *plane;
+       struct drm_plane_state *plane_state;
+       struct drm_crtc *crtc;
+       struct drm_crtc_state *crtc_state;
+       struct drm_connector *connector;
+       struct drm_connector_state *connector_state;
+       int i;
+
+       DRM_DEBUG_ATOMIC("checking %p\n", state);
+
+       for_each_plane_in_state(state, plane, plane_state, i)
+               drm_atomic_plane_print_state(&p, plane_state);
+
+       for_each_crtc_in_state(state, crtc, crtc_state, i)
+               drm_atomic_crtc_print_state(&p, crtc_state);
+
+       for_each_connector_in_state(state, connector, connector_state, i)
+               drm_atomic_connector_print_state(&p, connector_state);
+}
+
 /*
  * The big monstor ioctl
  */
@@ -1987,6 +2077,9 @@ retry:
                 */
                ret = drm_atomic_check_only(state);
        } else {
+               if (unlikely(drm_debug & DRM_UT_STATE))
+                       drm_atomic_print_state(state);
+
                if (arg->flags & DRM_MODE_ATOMIC_OUT_FENCE)
                        install_out_fence(state, arg->count_out_fences,
                                          fence_state);
diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index 7ffaa35..642d5da 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -133,6 +133,7 @@ struct dma_buf_attachment;
 #define DRM_UT_PRIME           0x08
 #define DRM_UT_ATOMIC          0x10
 #define DRM_UT_VBL             0x20
+#define DRM_UT_STATE           0x40

 extern __printf(2, 3)
 void drm_ut_debug_printk(const char *function_name,
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index 856fdf8..d74d47a 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -44,6 +44,7 @@ struct drm_framebuffer;
 struct drm_object_properties;
 struct drm_file;
 struct drm_clip_rect;
+struct drm_print;
 struct device_node;
 struct fence;
 struct edid;
@@ -707,6 +708,18 @@ struct drm_crtc_funcs {
                                   const struct drm_crtc_state *state,
                                   struct drm_property *property,
                                   uint64_t *val);
+
+       /**
+        * @atomic_print_state:
+        *
+        * If driver subclasses struct &drm_crtc_state, it should implement
+        * this optional hook for printing state.
+        *
+        * Do not call this directly, use drm_atomic_crtc_print_state()
+        * instead.
+        */
+       void (*atomic_print_state)(struct drm_print *p,
+                                  const struct drm_crtc_state *state);
 };

 /**
@@ -1132,6 +1145,18 @@ struct drm_connector_funcs {
                                   const struct drm_connector_state *state,
                                   struct drm_property *property,
                                   uint64_t *val);
+
+       /**
+        * @atomic_print_state:
+        *
+        * If driver subclasses struct &drm_connector_state, it should
+        * implement this optional hook for printing state.
+        *
+        * Do not call this directly, use drm_atomic_connector_print_state()
+        * instead.
+        */
+       void (*atomic_print_state)(struct drm_print *p,
+                                  const struct drm_connector_state *state);
 };

 /**
@@ -1623,6 +1648,18 @@ struct drm_plane_funcs {
                                   const struct drm_plane_state *state,
                                   struct drm_property *property,
                                   uint64_t *val);
+
+       /**
+        * @atomic_print_state:
+        *
+        * If driver subclasses struct &drm_plane_state, it should implement
+        * this optional hook for printing state.
+        *
+        * Do not call this directly, use drm_atomic_plane_print_state()
+        * instead.
+        */
+       void (*atomic_print_state)(struct drm_print *p,
+                                  const struct drm_plane_state *state);
 };

 enum drm_plane_type {
-- 
2.7.4

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