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-rw-r--r--arch/arm/mach-omap2/display.c125
1 files changed, 125 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/display.c b/arch/arm/mach-omap2/display.c
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+++ b/arch/arm/mach-omap2/display.c
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+/*
+ * OMAP2plus display device setup / initialization.
+ *
+ * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
+ * Senthilvadivu Guruswamy
+ * Sumit Semwal
+ *
+ * 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 "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+
+#include <plat/display.h>
+#include <plat/omap_hwmod.h>
+#include <plat/omap_device.h>
+
+static struct platform_device omap_display_device = {
+ .name = "omapdss",
+ .id = -1,
+ .dev = {
+ .platform_data = NULL,
+ },
+};
+
+static struct omap_device_pm_latency omap_dss_latency[] = {
+ [0] = {
+ .deactivate_func = omap_device_idle_hwmods,
+ .activate_func = omap_device_enable_hwmods,
+ .flags = OMAP_DEVICE_LATENCY_AUTO_ADJUST,
+ },
+};
+
+/* oh_core is used for getting opt-clocks */
+static struct omap_hwmod *oh_core;
+
+static bool opt_clock_available(const char *clk_role)
+{
+ int i;
+
+ for (i = 0; i < oh_core->opt_clks_cnt; i++) {
+ if (!strcmp(oh_core->opt_clks[i].role, clk_role))
+ return true;
+ }
+ return false;
+}
+
+int __init omap_display_init(struct omap_dss_board_info *board_data)
+{
+ int r = 0;
+ struct omap_hwmod *oh;
+ struct omap_device *od;
+ int i;
+ struct omap_display_platform_data pdata;
+
+ /*
+ * omap: valid DSS hwmod names
+ * omap2,3,4: dss_core, dss_dispc, dss_rfbi, dss_venc
+ * omap3,4: dss_dsi1
+ * omap4: dss_dsi2, dss_hdmi
+ */
+ char *oh_name[] = { "dss_core", "dss_dispc", "dss_rfbi", "dss_venc",
+ "dss_dsi1", "dss_dsi2", "dss_hdmi" };
+ char *dev_name[] = { "omapdss_dss", "omapdss_dispc", "omapdss_rfbi",
+ "omapdss_venc", "omapdss_dsi1", "omapdss_dsi2",
+ "omapdss_hdmi" };
+ int oh_count;
+
+ memset(&pdata, 0, sizeof(pdata));
+
+ if (cpu_is_omap24xx())
+ oh_count = ARRAY_SIZE(oh_name) - 3;
+ /* last 3 hwmod dev in oh_name are not available for omap2 */
+ else if (cpu_is_omap44xx())
+ oh_count = ARRAY_SIZE(oh_name);
+ else
+ oh_count = ARRAY_SIZE(oh_name) - 2;
+ /* last 2 hwmod dev in oh_name are not available for omap3 */
+
+ /* opt_clks are always associated with dss hwmod */
+ oh_core = omap_hwmod_lookup("dss_core");
+ if (!oh_core) {
+ pr_err("Could not look up dss_core.\n");
+ return -ENODEV;
+ }
+
+ pdata.board_data = board_data;
+ pdata.board_data->get_last_off_on_transaction_id = NULL;
+ pdata.opt_clock_available = opt_clock_available;
+
+ for (i = 0; i < oh_count; i++) {
+ oh = omap_hwmod_lookup(oh_name[i]);
+ if (!oh) {
+ pr_err("Could not look up %s\n", oh_name[i]);
+ return -ENODEV;
+ }
+
+ od = omap_device_build(dev_name[i], -1, oh, &pdata,
+ sizeof(struct omap_display_platform_data),
+ omap_dss_latency,
+ ARRAY_SIZE(omap_dss_latency), 0);
+
+ if (WARN((IS_ERR(od)), "Could not build omap_device for %s\n",
+ oh_name[i]))
+ return -ENODEV;
+ }
+ omap_display_device.dev.platform_data = board_data;
+
+ r = platform_device_register(&omap_display_device);
+ if (r < 0)
+ printk(KERN_ERR "Unable to register OMAP-Display device\n");
+
+ return r;
+}
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