drm/omap: move omapdss & displays under omapdrm

Now that omapfb has its own copy of omapdss and display drivers, we can
move omapdss and display drivers which omapdrm uses to omapdrm's
directory.

We also need to change the main drm Makefile so that omapdrm directory
is always entered, because omapdss has a file that can't be built as a
module.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: Dave Airlie <airlied@gmail.com>
Acked-by: Rob Clark <robdclark@gmail.com>

1 files changed, 225 insertions, 0 deletions

diff --git a/drivers/gpu/drm/omapdrm/dss/omapdss-boot-init.c b/drivers/gpu/drm/omapdrm/dss/omapdss-boot-init.c
new file mode 100644
index 000000000000..136d30484d02
--- /dev/null
+++ b/drivers/gpu/drm/omapdrm/dss/omapdss-boot-init.c
@@ -0,0 +1,225 @@
+/*
+ * Copyright (C) 2014 Texas Instruments
+ * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/*
+ * As omapdss panel drivers are omapdss specific, but we want to define the
+ * DT-data in generic manner, we convert the compatible strings of the panel and
+ * encoder nodes from "panel-foo" to "omapdss,panel-foo". This way we can have
+ * both correct DT data and omapdss specific drivers.
+ *
+ * When we get generic panel drivers to the kernel, this file will be removed.
+ */
+
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/of_graph.h>
+#include <linux/slab.h>
+#include <linux/list.h>
+
+static struct list_head dss_conv_list __initdata;
+
+static const char prefix[] __initconst = "omapdss,";
+
+struct dss_conv_node {
+        struct list_head list;
+        struct device_node *node;
+        bool root;
+};
+
+static int __init omapdss_count_strings(const struct property *prop)
+{
+        const char *p = prop->value;
+        int l = 0, total = 0;
+        int i;
+
+        for (i = 0; total < prop->length; total += l, p += l, i++)
+                l = strlen(p) + 1;
+
+        return i;
+}
+
+static void __init omapdss_update_prop(struct device_node *node, char *compat,
+        int len)
+{
+        struct property *prop;
+
+        prop = kzalloc(sizeof(*prop), GFP_KERNEL);
+        if (!prop)
+                return;
+
+        prop->name = "compatible";
+        prop->value = compat;
+        prop->length = len;
+
+        of_update_property(node, prop);
+}
+
+static void __init omapdss_prefix_strcpy(char *dst, int dst_len,
+        const char *src, int src_len)
+{
+        size_t total = 0;
+
+        while (total < src_len) {
+                size_t l = strlen(src) + 1;
+
+                strcpy(dst, prefix);
+                dst += strlen(prefix);
+
+                strcpy(dst, src);
+                dst += l;
+
+                src += l;
+                total += l;
+        }
+}
+
+/* prepend compatible property strings with "omapdss," */
+static void __init omapdss_omapify_node(struct device_node *node)
+{
+        struct property *prop;
+        char *new_compat;
+        int num_strs;
+        int new_len;
+
+        prop = of_find_property(node, "compatible", NULL);
+
+        if (!prop || !prop->value)
+                return;
+
+        if (strnlen(prop->value, prop->length) >= prop->length)
+                return;
+
+        /* is it already prefixed? */
+        if (strncmp(prefix, prop->value, strlen(prefix)) == 0)
+                return;
+
+        num_strs = omapdss_count_strings(prop);
+
+        new_len = prop->length + strlen(prefix) * num_strs;
+        new_compat = kmalloc(new_len, GFP_KERNEL);
+
+        omapdss_prefix_strcpy(new_compat, new_len, prop->value, prop->length);
+
+        omapdss_update_prop(node, new_compat, new_len);
+}
+
+static void __init omapdss_add_to_list(struct device_node *node, bool root)
+{
+        struct dss_conv_node *n = kmalloc(sizeof(struct dss_conv_node),
+                GFP_KERNEL);
+        if (n) {
+                n->node = node;
+                n->root = root;
+                list_add(&n->list, &dss_conv_list);
+        }
+}
+
+static bool __init omapdss_list_contains(const struct device_node *node)
+{
+        struct dss_conv_node *n;
+
+        list_for_each_entry(n, &dss_conv_list, list) {
+                if (n->node == node)
+                        return true;
+        }
+
+        return false;
+}
+
+static void __init omapdss_walk_device(struct device_node *node, bool root)
+{
+        struct device_node *n;
+
+        omapdss_add_to_list(node, root);
+
+        /*
+         * of_graph_get_remote_port_parent() prints an error if there is no
+         * port/ports node. To avoid that, check first that there's the node.
+         */
+        n = of_get_child_by_name(node, "ports");
+        if (!n)
+                n = of_get_child_by_name(node, "port");
+        if (!n)
+                return;
+
+        of_node_put(n);
+
+        n = NULL;
+        while ((n = of_graph_get_next_endpoint(node, n)) != NULL) {
+                struct device_node *pn;
+
+                pn = of_graph_get_remote_port_parent(n);
+
+                if (!pn)
+                        continue;
+
+                if (!of_device_is_available(pn) || omapdss_list_contains(pn)) {
+                        of_node_put(pn);
+                        continue;
+                }
+
+                omapdss_walk_device(pn, false);
+        }
+}
+
+static const struct of_device_id omapdss_of_match[] __initconst = {
+        { .compatible = "ti,omap2-dss", },
+        { .compatible = "ti,omap3-dss", },
+        { .compatible = "ti,omap4-dss", },
+        { .compatible = "ti,omap5-dss", },
+        { .compatible = "ti,dra7-dss", },
+        {},
+};
+
+static int __init omapdss_boot_init(void)
+{
+        struct device_node *dss, *child;
+
+        INIT_LIST_HEAD(&dss_conv_list);
+
+        dss = of_find_matching_node(NULL, omapdss_of_match);
+
+        if (dss == NULL || !of_device_is_available(dss))
+                return 0;
+
+        omapdss_walk_device(dss, true);
+
+        for_each_available_child_of_node(dss, child) {
+                if (!of_find_property(child, "compatible", NULL))
+                        continue;
+
+                omapdss_walk_device(child, true);
+        }
+
+        while (!list_empty(&dss_conv_list)) {
+                struct dss_conv_node *n;
+
+                n = list_first_entry(&dss_conv_list, struct dss_conv_node,
+                        list);
+
+                if (!n->root)
+                        omapdss_omapify_node(n->node);
+
+                list_del(&n->list);
+                of_node_put(n->node);
+                kfree(n);
+        }
+
+        return 0;
+}
+
+subsys_initcall(omapdss_boot_init);