Co-Author : Marius Vlad <marius.c.v...@intel.com>
Co-Author : Pratik Vishwakarma <pratik.vishwaka...@intel.com>

So far we have had only two commit styles, COMMIT_LEGACY
and COMMIT_UNIVERSAL. This patch adds another commit style
COMMIT_ATOMIC which makes use of drmModeAtomicCommit()

v2: (Marius)
        i)Set CRTC_ID to zero while disabling plane
        ii)Modified the log message in igt_atomic_prepare_plane_commit
        https://patchwork.freedesktop.org/patch/71945/

v3: (Marius)Set FB_ID to zero while disabling plane
        https://patchwork.freedesktop.org/patch/72179/

v4: (Maarten) Corrected the typo in commit message
        https://patchwork.freedesktop.org/patch/72598/

v5: Added check for DRM_CLIENT_CAP_ATOMIC in igt_display_init
    (Marius)
        i)Removed unused props from igt_display_init
        ii)Removed unused ret. Changed function to void
        iii)Declare the variable before checking if we have
        DRM_CLIENT_CAP_ATOMIC.
        https://patchwork.freedesktop.org/patch/73505/

v6: (Jani) Corrected typo in commit message

v7: Added is_atomic check for DRM_CLIENT_CAP_ATOMIC in
        igt_display_init and igt_atomic_commit

v8: (Matthew Auld) Replaced for loops by for_each_connected_output and
        for_each_plane_on_pipe
    (Lionel) Populate properties only if the value has changed
        Remove the resetting of values in disable case
        Note : I've used Maarten's diff patch

Signed-off-by: Mayuresh Gharpure <mayuresh.s.gharp...@intel.com>
Signed-off-by: Pratik Vishwakarma <pratik.vishwaka...@intel.com>
Signed-off-by: Mayuresh Gharpure <mayuresh.s.gharp...@intel.com>
---
Incorporated Comments Matthew and Lionel
 lib/igt_kms.c | 289 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 lib/igt_kms.h |  72 ++++++++++++++-
 2 files changed, 359 insertions(+), 2 deletions(-)

diff --git a/lib/igt_kms.c b/lib/igt_kms.c
index 9f18aef..5b6c324 100644
--- a/lib/igt_kms.c
+++ b/lib/igt_kms.c
@@ -145,6 +145,120 @@ const unsigned char* igt_kms_get_base_edid(void)
  *
  * Returns: an alternate edid block
  */
+static const char *igt_plane_prop_names[IGT_NUM_PLANE_PROPS] = {
+       "SRC_X",
+       "SRC_Y",
+       "SRC_W",
+       "SRC_H",
+       "CRTC_X",
+       "CRTC_Y",
+       "CRTC_W",
+       "CRTC_H",
+       "FB_ID",
+       "CRTC_ID",
+       "type",
+       "rotation"
+};
+
+static const char *igt_crtc_prop_names[IGT_NUM_CRTC_PROPS] = {
+       "background_color"
+};
+
+static const char *igt_connector_prop_names[IGT_NUM_CONNECTOR_PROPS] = {
+       "scaling mode",
+       "DPMS"
+};
+
+/*
+ * Retrieve all the properies specified in props_name and store them into
+ * plane->atomic_props_plane.
+ */
+static void
+igt_atomic_fill_plane_props(igt_display_t *display, igt_plane_t *plane,
+                       int num_props, const char **prop_names)
+{
+       drmModeObjectPropertiesPtr props;
+       int i, j, fd;
+
+       fd = display->drm_fd;
+
+       props = drmModeObjectGetProperties(fd, plane->drm_plane->plane_id, 
DRM_MODE_OBJECT_PLANE);
+       igt_assert(props);
+
+       for (i = 0; i < props->count_props; i++) {
+               drmModePropertyPtr prop =
+                       drmModeGetProperty(fd, props->props[i]);
+
+               for (j = 0; j < num_props; j++) {
+                       if (strcmp(prop->name, prop_names[j]) != 0)
+                               continue;
+
+                       plane->atomic_props_plane[j] = props->props[i];
+                       break;
+               }
+
+               drmModeFreeProperty(prop);
+       }
+
+       drmModeFreeObjectProperties(props);
+}
+
+/*
+ * Retrieve all the properies specified in props_name and store them into
+ * config->atomic_props_crtc and config->atomic_props_connector.
+ */
+static void
+igt_atomic_fill_props(igt_display_t *display, igt_output_t *output,
+                       int num_crtc_props, const char **crtc_prop_names,
+                       int num_connector_props, const char **conn_prop_names)
+{
+       drmModeObjectPropertiesPtr props;
+       int i, j, fd;
+
+       fd = display->drm_fd;
+
+       props = drmModeObjectGetProperties(fd, output->config.crtc->crtc_id, 
DRM_MODE_OBJECT_CRTC);
+       igt_assert(props);
+
+       for (i = 0; i < props->count_props; i++) {
+               drmModePropertyPtr prop =
+                       drmModeGetProperty(fd, props->props[i]);
+
+               for (j = 0; j < num_crtc_props; j++) {
+                       if (strcmp(prop->name, crtc_prop_names[j]) != 0)
+                               continue;
+
+                       output->config.atomic_props_crtc[j] = props->props[i];
+                       break;
+               }
+
+               drmModeFreeProperty(prop);
+       }
+
+       drmModeFreeObjectProperties(props);
+       props = NULL;
+       props = drmModeObjectGetProperties(fd, 
output->config.connector->connector_id, DRM_MODE_OBJECT_CONNECTOR);
+       igt_assert(props);
+
+       for (i = 0; i < props->count_props; i++) {
+               drmModePropertyPtr prop =
+                       drmModeGetProperty(fd, props->props[i]);
+
+               for (j = 0; j < num_connector_props; j++) {
+                       if (strcmp(prop->name, conn_prop_names[j]) != 0)
+                               continue;
+
+                       output->config.atomic_props_connector[j] = 
props->props[i];
+                       break;
+               }
+
+               drmModeFreeProperty(prop);
+       }
+
+       drmModeFreeObjectProperties(props);
+
+}
+
 const unsigned char* igt_kms_get_alt_edid(void)
 {
        update_edid_csum(alt_edid);
@@ -1000,6 +1114,8 @@ static void igt_output_refresh(igt_output_t *output)
            kmstest_pipe_name(output->config.pipe));
 
        display->pipes_in_use |= 1 << output->config.pipe;
+       igt_atomic_fill_props(display, output, IGT_NUM_CRTC_PROPS, 
igt_crtc_prop_names,
+               IGT_NUM_CONNECTOR_PROPS, igt_connector_prop_names);
 }
 
 static bool
@@ -1069,6 +1185,7 @@ void igt_display_init(igt_display_t *display, int drm_fd)
        drmModeRes *resources;
        drmModePlaneRes *plane_resources;
        int i;
+       int is_atomic = 0;
 
        memset(display, 0, sizeof(igt_display_t));
 
@@ -1086,6 +1203,7 @@ void igt_display_init(igt_display_t *display, int drm_fd)
        display->n_pipes = resources->count_crtcs;
 
        drmSetClientCap(drm_fd, DRM_CLIENT_CAP_UNIVERSAL_PLANES, 1);
+       is_atomic = drmSetClientCap(drm_fd, DRM_CLIENT_CAP_ATOMIC, 1);
        plane_resources = drmModeGetPlaneResources(display->drm_fd);
        igt_assert(plane_resources);
 
@@ -1142,6 +1260,10 @@ void igt_display_init(igt_display_t *display, int drm_fd)
 
                        plane->pipe = pipe;
                        plane->drm_plane = drm_plane;
+                       if (is_atomic == 0) {
+                               display->is_atomic = 1;
+                               igt_atomic_fill_plane_props(display, plane, 
IGT_NUM_PLANE_PROPS, igt_plane_prop_names);
+                       }
 
                        get_plane_property(display->drm_fd, drm_plane->plane_id,
                                           "rotation",
@@ -1397,6 +1519,79 @@ static uint32_t igt_plane_get_fb_gem_handle(igt_plane_t 
*plane)
        igt_assert(r == 0);     \
 }
 
+
+
+
+/*
+ * Add position and fb changes of a plane to the atomic property set
+ */
+static void
+igt_atomic_prepare_plane_commit(igt_plane_t *plane, igt_output_t *output,
+       drmModeAtomicReq *req)
+{
+
+       igt_display_t *display = output->display;
+       uint32_t fb_id, crtc_id;
+
+       igt_assert(plane->drm_plane);
+
+       /* it's an error to try an unsupported feature */
+       igt_assert(igt_plane_supports_rotation(plane) ||
+                       !plane->rotation_changed);
+
+       fb_id = igt_plane_get_fb_id(plane);
+       crtc_id = output->config.crtc->crtc_id;
+
+       LOG(display,
+           "%s: populating plane data: %s.%d, fb %u\n",
+           igt_output_name(output),
+           kmstest_pipe_name(output->config.pipe),
+           plane->index,
+           fb_id);
+
+       if (plane->fb_changed) {
+               igt_atomic_populate_plane_req(req, plane, IGT_PLANE_CRTC_ID, 
fb_id ? crtc_id : 0);
+               igt_atomic_populate_plane_req(req, plane, IGT_PLANE_FB_ID, 
fb_id);
+       }
+
+       if (plane->position_changed || plane->size_changed) {
+               uint32_t src_x = IGT_FIXED(plane->fb->src_x, 0); /* src_x */
+               uint32_t src_y = IGT_FIXED(plane->fb->src_y, 0); /* src_y */
+               uint32_t src_w = IGT_FIXED(plane->fb->src_w, 0); /* src_w */
+               uint32_t src_h = IGT_FIXED(plane->fb->src_h, 0); /* src_h */
+               int32_t crtc_x = plane->crtc_x;
+               int32_t crtc_y = plane->crtc_y;
+               uint32_t crtc_w = plane->crtc_w;
+               uint32_t crtc_h = plane->crtc_h;
+
+               LOG(display,
+               "src = (%d, %d) %u x %u "
+               "dst = (%d, %d) %u x %u\n",
+               src_x >> 16, src_y >> 16, src_w >> 16, src_h >> 16,
+               crtc_x, crtc_y, crtc_w, crtc_h);
+
+               igt_atomic_populate_plane_req(req, plane, IGT_PLANE_SRC_X, 
src_x);
+               igt_atomic_populate_plane_req(req, plane, IGT_PLANE_SRC_Y, 
src_y);
+               igt_atomic_populate_plane_req(req, plane, IGT_PLANE_SRC_W, 
src_w);
+               igt_atomic_populate_plane_req(req, plane, IGT_PLANE_SRC_H, 
src_h);
+
+               igt_atomic_populate_plane_req(req, plane, IGT_PLANE_CRTC_X, 
crtc_x);
+               igt_atomic_populate_plane_req(req, plane, IGT_PLANE_CRTC_Y, 
crtc_y);
+               igt_atomic_populate_plane_req(req, plane, IGT_PLANE_CRTC_W, 
crtc_w);
+               igt_atomic_populate_plane_req(req, plane, IGT_PLANE_CRTC_H, 
crtc_h);
+       }
+
+       if (plane->rotation_changed)
+               igt_atomic_populate_plane_req(req, plane,
+                       IGT_PLANE_ROTATION, plane->rotation);
+
+       plane->fb_changed = false;
+       plane->position_changed = false;
+       plane->size_changed = false;
+}
+
+
+
 /*
  * Commit position and fb changes to a DRM plane via the SetPlane ioctl; if the
  * DRM call to program the plane fails, we'll either fail immediately (for
@@ -1649,7 +1844,7 @@ static int igt_plane_commit(igt_plane_t *plane,
                return igt_primary_plane_commit_legacy(plane, output,
                                                       fail_on_error);
        } else {
-               return igt_drm_plane_commit(plane, output, fail_on_error);
+                       return igt_drm_plane_commit(plane, output, 
fail_on_error);
        }
 }
 
@@ -1703,6 +1898,90 @@ static int igt_output_commit(igt_output_t *output,
        return 0;
 }
 
+
+/*
+ * Add crtc property changes to the atomic property set
+ */
+static void igt_atomic_prepare_crtc_commit(igt_output_t *output, 
drmModeAtomicReq *req)
+{
+
+       igt_pipe_t *pipe_obj = igt_output_get_driving_pipe(output);
+
+       if (pipe_obj->background_changed)
+               igt_atomic_populate_crtc_req(req, output, IGT_CRTC_BACKGROUND, 
pipe_obj->background);
+
+       /*
+        *      TODO: Add all crtc level properties here
+        */
+
+}
+
+/*
+ * Add connector property changes to the atomic property set
+ */
+static void igt_atomic_prepare_connector_commit(igt_output_t *output, 
drmModeAtomicReq *req)
+{
+
+       struct kmstest_connector_config *config = &output->config;
+
+       if (config->connector_scaling_mode_changed)
+               igt_atomic_populate_connector_req(req, output, 
IGT_CONNECTOR_SCALING_MODE, config->connector_scaling_mode);
+
+       if (config->connector_dpms_changed)
+               igt_atomic_populate_connector_req(req, output, 
IGT_CONNECTOR_DPMS, config->connector_dpms);
+       /*
+        *      TODO: Add all other connector level properties here
+        */
+
+}
+
+/*
+ * Commit all the changes of all the planes,crtcs, connectors
+ * atomically using drmModeAtomicCommit()
+ */
+static int igt_atomic_commit(igt_display_t *display)
+{
+
+       int ret = 0;
+       int i = 0;
+       drmModeAtomicReq *req;
+       igt_output_t *output;
+       if (display->is_atomic != 1)
+               return -1;
+       req = drmModeAtomicAlloc();
+       drmModeAtomicSetCursor(req, 0);
+
+       for_each_connected_output(display, output) {
+               igt_pipe_t *pipe_obj;
+               igt_plane_t *plane;
+               enum pipe pipe;
+
+               /*
+                * Add CRTC Properties to the property set
+                */
+               igt_atomic_prepare_crtc_commit(output, req);
+
+               /*
+                * Add Connector Properties to the property set
+                */
+               igt_atomic_prepare_connector_commit(output, req);
+
+
+               pipe_obj = igt_output_get_driving_pipe(output);
+
+               pipe = pipe_obj->pipe;
+
+               for_each_plane_on_pipe(display, pipe, plane) {
+                       igt_atomic_prepare_plane_commit(plane, output, req);
+               }
+
+       }
+
+       ret = drmModeAtomicCommit(display->drm_fd, req, 0, NULL);
+       drmModeAtomicFree(req);
+       return ret;
+
+}
 /*
  * Commit all plane changes across all outputs of the display.
  *
@@ -1722,6 +2001,14 @@ static int do_display_commit(igt_display_t *display,
 
        igt_display_refresh(display);
 
+       if (s == COMMIT_ATOMIC) {
+
+               ret = igt_atomic_commit(display);
+               CHECK_RETURN(ret, fail_on_error);
+               return 0;
+
+       }
+
        for (i = 0; i < display->n_outputs; i++) {
                igt_output_t *output = &display->outputs[i];
 
diff --git a/lib/igt_kms.h b/lib/igt_kms.h
index 5744ed0..d6e2f12 100644
--- a/lib/igt_kms.h
+++ b/lib/igt_kms.h
@@ -106,11 +106,28 @@ int kmstest_get_pipe_from_crtc_id(int fd, int crtc_id);
 void kmstest_set_vt_graphics_mode(void);
 void kmstest_restore_vt_mode(void);
 
+enum igt_atomic_crtc_properties {
+       IGT_CRTC_BACKGROUND = 0,
+       IGT_NUM_CRTC_PROPS
+};
+
+enum igt_atomic_connector_properties {
+       IGT_CONNECTOR_SCALING_MODE = 0,
+       IGT_CONNECTOR_DPMS,
+       IGT_NUM_CONNECTOR_PROPS
+};
+
 struct kmstest_connector_config {
        drmModeCrtc *crtc;
        drmModeConnector *connector;
        drmModeEncoder *encoder;
        drmModeModeInfo default_mode;
+       uint64_t connector_scaling_mode;
+       bool connector_scaling_mode_changed;
+       uint64_t connector_dpms;
+       bool connector_dpms_changed;
+       uint32_t atomic_props_crtc[IGT_NUM_CRTC_PROPS];
+       uint32_t atomic_props_connector[IGT_NUM_CONNECTOR_PROPS];
        int crtc_idx;
        int pipe;
 };
@@ -163,9 +180,28 @@ uint32_t kmstest_find_crtc_for_connector(int fd, 
drmModeRes *res,
 enum igt_commit_style {
        COMMIT_LEGACY = 0,
        COMMIT_UNIVERSAL,
-       /* We'll add atomic here eventually. */
+       COMMIT_ATOMIC,
 };
 
+enum igt_atomic_plane_properties {
+       IGT_PLANE_SRC_X = 0,
+       IGT_PLANE_SRC_Y,
+       IGT_PLANE_SRC_W,
+       IGT_PLANE_SRC_H,
+
+       IGT_PLANE_CRTC_X,
+       IGT_PLANE_CRTC_Y,
+       IGT_PLANE_CRTC_W,
+       IGT_PLANE_CRTC_H,
+
+       IGT_PLANE_FB_ID,
+       IGT_PLANE_CRTC_ID,
+       IGT_PLANE_TYPE,
+       IGT_PLANE_ROTATION,
+       IGT_NUM_PLANE_PROPS
+};
+
+
 typedef struct igt_display igt_display_t;
 typedef struct igt_pipe igt_pipe_t;
 typedef uint32_t igt_fixed_t;                  /* 16.16 fixed point */
@@ -207,6 +243,7 @@ typedef struct {
        /* panning offset within the fb */
        unsigned int pan_x, pan_y;
        igt_rotation_t rotation;
+       uint32_t atomic_props_plane[IGT_NUM_PLANE_PROPS];
 } igt_plane_t;
 
 struct igt_pipe {
@@ -242,6 +279,7 @@ struct igt_display {
        igt_output_t *outputs;
        igt_pipe_t pipes[I915_MAX_PIPES];
        bool has_universal_planes;
+       bool is_atomic;
 };
 
 void igt_display_init(igt_display_t *display, int drm_fd);
@@ -288,6 +326,38 @@ void igt_wait_for_vblank(int drm_fd, enum pipe pipe);
 
 #define IGT_FIXED(i,f) ((i) << 16 | (f))
 
+/**
+ * igt_atomic_populate_plane_req:
+ * @req: A pointer to drmModeAtomicReq
+ * @plane: A pointer igt_plane_t
+ * @prop: one of igt_atomic_plane_properties
+ * @value: the value to add
+ */
+#define igt_atomic_populate_plane_req(req, plane, prop, value) \
+       igt_assert_lt(0, drmModeAtomicAddProperty(req, 
plane->drm_plane->plane_id,\
+                                                 
plane->atomic_props_plane[prop], value))
+
+/**
+ * igt_atomic_populate_crtc_req:
+ * @req: A pointer to drmModeAtomicReq
+ * @output: A pointer igt_output_t
+ * @prop: one of igt_atomic_crtc_properties
+ * @value: the value to add
+ */
+#define igt_atomic_populate_crtc_req(req, output, prop, value) \
+       igt_assert_lt(0, drmModeAtomicAddProperty(req, 
output->config.crtc->crtc_id,\
+                                                 
output->config.atomic_props_crtc[prop], value))
+/**
+ * igt_atomic_populate_connector_req:
+ * @req: A pointer to drmModeAtomicReq
+ * @output: A pointer igt_output_t
+ * @prop: one of igt_atomic_connector_properties
+ * @value: the value to add
+ */
+#define igt_atomic_populate_connector_req(req, output, prop, value) \
+       igt_assert_lt(0, drmModeAtomicAddProperty(req, 
output->config.connector->connector_id,\
+                                                 
output->config.atomic_props_connector[prop], value))
+
 void igt_enable_connectors(void);
 void igt_reset_connectors(void);
 
-- 
1.9.1

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