drm/rcar-du/crc: Implement get_crc_sources callback

This patch implements get_crc_sources callback, which returns list of
all the crc sources supported by driver in current platform.

Changes Since V1:
 - move sources list per-crtc
 - init sources-list only for gen3
Changes Since V2:
 - Adopt to driver style
 - Address other review comments from Laurent Pinchart
Changes Since V3/4/5: (Laurent Pinchart review)
 - s/rcar_du_crtc_crc_sources_list_init/rcar_du_crtc_crc_init
 - s/rcar_du_crtc_crc_sources_list_uninit/rcar_du_crtc_crc_cleanup
 - other cleanup

Signed-off-by: Mahesh Kumar <mahesh1.kumar@intel.com>
Cc: dri-devel@lists.freedesktop.org
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180808152630.6563-1-mahesh1.kumar@intel.com

diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
index 80226ca..57db868 100644 (file)
--- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.c
@@ -691,6 +691,65 @@ static const struct drm_crtc_helper_funcs crtc_helper_funcs = {
        .atomic_disable = rcar_du_crtc_atomic_disable,
 };
 
+static void rcar_du_crtc_crc_init(struct rcar_du_crtc *rcrtc)
+{
+       struct rcar_du_device *rcdu = rcrtc->group->dev;
+       const char **sources;
+       unsigned int count;
+       int i = -1;
+
+       /* CRC available only on Gen3 HW. */
+       if (rcdu->info->gen < 3)
+               return;
+
+       /* Reserve 1 for "auto" source. */
+       count = rcrtc->vsp->num_planes + 1;
+
+       sources = kmalloc_array(count, sizeof(*sources), GFP_KERNEL);
+       if (!sources)
+               return;
+
+       sources[0] = kstrdup("auto", GFP_KERNEL);
+       if (!sources[0])
+               goto error;
+
+       for (i = 0; i < rcrtc->vsp->num_planes; ++i) {
+               struct drm_plane *plane = &rcrtc->vsp->planes[i].plane;
+               char name[16];
+
+               sprintf(name, "plane%u", plane->base.id);
+               sources[i + 1] = kstrdup(name, GFP_KERNEL);
+               if (!sources[i + 1])
+                       goto error;
+       }
+
+       rcrtc->sources = sources;
+       rcrtc->sources_count = count;
+       return;
+
+error:
+       while (i >= 0) {
+               kfree(sources[i]);
+               i--;
+       }
+       kfree(sources);
+}
+
+static void rcar_du_crtc_crc_cleanup(struct rcar_du_crtc *rcrtc)
+{
+       unsigned int i;
+
+       if (!rcrtc->sources)
+               return;
+
+       for (i = 0; i < rcrtc->sources_count; i++)
+               kfree(rcrtc->sources[i]);
+       kfree(rcrtc->sources);
+
+       rcrtc->sources = NULL;
+       rcrtc->sources_count = 0;
+}
+
 static struct drm_crtc_state *
 rcar_du_crtc_atomic_duplicate_state(struct drm_crtc *crtc)
 {
@@ -717,6 +776,15 @@ static void rcar_du_crtc_atomic_destroy_state(struct drm_crtc *crtc,
        kfree(to_rcar_crtc_state(state));
 }
 
+static void rcar_du_crtc_cleanup(struct drm_crtc *crtc)
+{
+       struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc);
+
+       rcar_du_crtc_crc_cleanup(rcrtc);
+
+       return drm_crtc_cleanup(crtc);
+}
+
 static void rcar_du_crtc_reset(struct drm_crtc *crtc)
 {
        struct rcar_du_crtc_state *state;
@@ -809,6 +877,15 @@ static int rcar_du_crtc_verify_crc_source(struct drm_crtc *crtc,
        return 0;
 }
 
+const char *const *rcar_du_crtc_get_crc_sources(struct drm_crtc *crtc,
+                                               size_t *count)
+{
+       struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc);
+
+       *count = rcrtc->sources_count;
+       return rcrtc->sources;
+}
+
 static int rcar_du_crtc_set_crc_source(struct drm_crtc *crtc,
                                       const char *source_name,
                                       size_t *values_cnt)
@@ -881,7 +958,7 @@ static const struct drm_crtc_funcs crtc_funcs_gen2 = {
 
 static const struct drm_crtc_funcs crtc_funcs_gen3 = {
        .reset = rcar_du_crtc_reset,
-       .destroy = drm_crtc_cleanup,
+       .destroy = rcar_du_crtc_cleanup,
        .set_config = drm_atomic_helper_set_config,
        .page_flip = drm_atomic_helper_page_flip,
        .atomic_duplicate_state = rcar_du_crtc_atomic_duplicate_state,
@@ -890,6 +967,7 @@ static const struct drm_crtc_funcs crtc_funcs_gen3 = {
        .disable_vblank = rcar_du_crtc_disable_vblank,
        .set_crc_source = rcar_du_crtc_set_crc_source,
        .verify_crc_source = rcar_du_crtc_verify_crc_source,
+       .get_crc_sources = rcar_du_crtc_get_crc_sources,
 };
 
 /* -----------------------------------------------------------------------------
@@ -1028,5 +1106,7 @@ int rcar_du_crtc_create(struct rcar_du_group *rgrp, unsigned int swindex,
                return ret;
        }
 
+       rcar_du_crtc_crc_init(rcrtc);
+
        return 0;
 }

diff --git a/drivers/gpu/drm/rcar-du/rcar_du_crtc.h b/drivers/gpu/drm/rcar-du/rcar_du_crtc.h
index 7680cb2..592c799 100644 (file)
--- a/drivers/gpu/drm/rcar-du/rcar_du_crtc.h
+++ b/drivers/gpu/drm/rcar-du/rcar_du_crtc.h
@@ -67,6 +67,9 @@ struct rcar_du_crtc {
        struct rcar_du_group *group;
        struct rcar_du_vsp *vsp;
        unsigned int vsp_pipe;
+
+       const char *const *sources;
+       unsigned int sources_count;
 };
 
 #define to_rcar_crtc(c)        container_of(c, struct rcar_du_crtc, crtc)