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+/*
+ * linux/drivers/video/omap2/dss/dss_features.c
+ *
+ * Copyright (C) 2010 Texas Instruments
+ * Author: Archit Taneja <archit@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/>.
+ */
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/err.h>
+#include <linux/slab.h>
+
+#include <plat/display.h>
+#include <plat/cpu.h>
+
+#include "dss_features.h"
+
+static struct list_head reg_field_list;
+static int num_reg_fields;
+
+/* Defines a generic omap register field */
+struct dss_reg_field {
+ struct list_head list;
+ int id;
+ u8 start, end;
+};
+
+/* This struct is divided into 2 sets: the first gives a value corresponding
+ * to a feature, the second tells if a dss feature exists or not */
+static struct
+{
+ int num_mgrs;
+ int num_ovls;
+ enum omap_display_type supported_displays[MAX_DSS_MANAGERS];
+ enum omap_color_mode supported_color_modes[MAX_DSS_OVERLAYS];
+
+ bool has_feature[MAX_DSS_FEATURES];
+} omap_dss_features;
+
+/* Functions to add/fetch the start and end bits of a DSS register field */
+static void dss_add_reg_field(int id, u8 start, u8 end)
+{
+ struct dss_reg_field *field;
+ field = kzalloc(sizeof(*field), GFP_KERNEL);
+
+ ++num_reg_fields;
+
+ field->id = id;
+ field->start = start;
+ field->end = end;
+
+ list_add_tail(&field->list, ®_field_list);
+}
+
+void omap_dss_get_reg_field(int id, u8 *start, u8 *end)
+{
+ struct dss_reg_field *field;
+
+ list_for_each_entry(field, ®_field_list, list) {
+ if (field->id == id) {
+ *start = field->start;
+ *end = field->end;
+ return;
+ }
+ }
+ BUG();
+}
+EXPORT_SYMBOL(omap_dss_get_reg_field);
+
+/* Functions returning values related to a DSS feature */
+int omap_dss_num_mgrs(void)
+{
+ return omap_dss_features.num_mgrs;
+}
+EXPORT_SYMBOL(omap_dss_num_mgrs);
+
+int omap_dss_num_ovls(void)
+{
+ return omap_dss_features.num_ovls;
+}
+EXPORT_SYMBOL(omap_dss_num_ovls);
+
+enum omap_display_type omap_dss_supported_displays(int id)
+{
+ return omap_dss_features.supported_displays[id];
+}
+EXPORT_SYMBOL(omap_dss_supported_displays);
+
+enum omap_color_mode omap_dss_supported_color_modes(int id)
+{
+ return omap_dss_features.supported_color_modes[id];
+}
+EXPORT_SYMBOL(omap_dss_supported_color_modes);
+
+/* DSS has_feature check */
+bool omap_dss_has_feature(int id)
+{
+ return omap_dss_features.has_feature[id];
+}
+EXPORT_SYMBOL(omap_dss_has_feature);
+
+void omap_dss_features_init(void)
+{
+ INIT_LIST_HEAD(®_field_list);
+ num_reg_fields = 0;
+
+ omap_dss_features.num_mgrs = 2;
+ omap_dss_features.num_ovls = 3;
+
+ omap_dss_features.supported_displays[OMAP_DSS_CHANNEL_LCD] =
+ OMAP_DISPLAY_TYPE_DPI | OMAP_DISPLAY_TYPE_DBI |
+ OMAP_DISPLAY_TYPE_SDI | OMAP_DISPLAY_TYPE_DSI;
+
+ omap_dss_features.supported_displays[OMAP_DSS_CHANNEL_DIGIT] =
+ OMAP_DISPLAY_TYPE_VENC;
+
+ omap_dss_features.has_feature[GLOBAL_ALPHA_VIDEO1] = false;
+
+ if (cpu_is_omap34xx()) {
+ omap_dss_features.supported_color_modes[OMAP_DSS_GFX] =
+ OMAP_DSS_COLOR_CLUT1 | OMAP_DSS_COLOR_CLUT2 |
+ OMAP_DSS_COLOR_CLUT4 | OMAP_DSS_COLOR_CLUT8 |
+ OMAP_DSS_COLOR_RGB12U | OMAP_DSS_COLOR_ARGB16 |
+ OMAP_DSS_COLOR_RGB16 | OMAP_DSS_COLOR_RGB24U |
+ OMAP_DSS_COLOR_RGB24P | OMAP_DSS_COLOR_ARGB32 |
+ OMAP_DSS_COLOR_RGBA32 | OMAP_DSS_COLOR_RGBX32;
+
+ omap_dss_features.supported_color_modes[OMAP_DSS_VIDEO1] =
+ OMAP_DSS_COLOR_RGB24U | OMAP_DSS_COLOR_RGB24P |
+ OMAP_DSS_COLOR_RGB12U | OMAP_DSS_COLOR_RGB16 |
+ OMAP_DSS_COLOR_YUV2 | OMAP_DSS_COLOR_UYVY;
+
+ omap_dss_features.supported_color_modes[OMAP_DSS_VIDEO2] =
+ OMAP_DSS_COLOR_RGB12U | OMAP_DSS_COLOR_ARGB16 |
+ OMAP_DSS_COLOR_RGB16 | OMAP_DSS_COLOR_RGB24U |
+ OMAP_DSS_COLOR_RGB24P | OMAP_DSS_COLOR_YUV2 |
+ OMAP_DSS_COLOR_UYVY | OMAP_DSS_COLOR_ARGB32 |
+ OMAP_DSS_COLOR_RGBA32 | OMAP_DSS_COLOR_RGBX32;
+
+ omap_dss_features.has_feature[GLOBAL_ALPHA] = true;
+
+ dss_add_reg_field(FIRHINC, 12, 0);
+ dss_add_reg_field(FIRVINC, 28, 16);
+ dss_add_reg_field(FIFOLOWTHRESHOLD, 11, 0);
+ dss_add_reg_field(FIFOHIGHTHRESHOLD, 27, 16);
+ dss_add_reg_field(FIFOSIZE, 10, 0);
+ } else {
+ /* cpu_is_omap24xx() */
+ omap_dss_features.supported_color_modes[OMAP_DSS_GFX] =
+ OMAP_DSS_COLOR_CLUT1 | OMAP_DSS_COLOR_CLUT2 |
+ OMAP_DSS_COLOR_CLUT4 | OMAP_DSS_COLOR_CLUT8 |
+ OMAP_DSS_COLOR_RGB12U | OMAP_DSS_COLOR_RGB16 |
+ OMAP_DSS_COLOR_RGB24U | OMAP_DSS_COLOR_RGB24P;
+
+ omap_dss_features.supported_color_modes[OMAP_DSS_VIDEO1] =
+ omap_dss_features.supported_color_modes[OMAP_DSS_VIDEO2] =
+ OMAP_DSS_COLOR_RGB16 | OMAP_DSS_COLOR_RGB24U |
+ OMAP_DSS_COLOR_RGB24P | OMAP_DSS_COLOR_YUV2 |
+ OMAP_DSS_COLOR_UYVY;
+
+ omap_dss_features.has_feature[GLOBAL_ALPHA] = false;
+
+ dss_add_reg_field(FIRHINC, 11, 0);
+ dss_add_reg_field(FIRVINC, 12, 0);
+ dss_add_reg_field(FIFOLOWTHRESHOLD, 8, 0);
+ dss_add_reg_field(FIFOHIGHTHRESHOLD, 24, 16);
+ dss_add_reg_field(FIFOSIZE, 8, 0);
+ }
+}
+EXPORT_SYMBOL(omap_dss_features_init);
+
+void omap_dss_features_exit(void)
+{
+ /* We only need to free the register field list for now */
+ struct dss_reg_field *field;
+
+ while (!list_empty(®_field_list)) {
+ field = list_first_entry(®_field_list,
+ struct dss_reg_field, list);
+ list_del(&field->list);
+ kfree(field);
+ }
+ num_reg_fields = 0;
+}
+EXPORT_SYMBOL(omap_dss_features_exit);
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+/*
+ * linux/drivers/video/omap2/dss/dss_features.h
+ *
+ * Copyright (C) 2010 Texas Instruments
+ * Author: Archit Taneja <archit@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/>.
+ */
+
+#ifndef __OMAP2_DSS_FEATURES_H
+#define __OMAP2_DSS_FEATURES_H
+
+#define MAX_DSS_MANAGERS 2
+#define MAX_DSS_OVERLAYS 3
+#define MAX_DSS_FEATURES 10
+
+/* DSS has feature id */
+#define GLOBAL_ALPHA 0
+#define GLOBAL_ALPHA_VIDEO1 1
+
+/* DSS register field id */
+#define FIRHINC 0
+#define FIRVINC 1
+#define FIFOHIGHTHRESHOLD 2
+#define FIFOLOWTHRESHOLD 3
+#define FIFOSIZE 4
+
+/* DSS Feature Functions */
+void omap_dss_get_reg_field(int id, u8 *start, u8 *end);
+int omap_dss_num_mgrs(void);
+int omap_dss_num_ovls(void);
+enum omap_display_type omap_dss_supported_displays(int id);
+enum omap_color_mode omap_dss_supported_color_modes(int id);
+
+bool omap_dss_has_feature(int id);
+void omap_dss_features_init(void);
+void omap_dss_features_exit(void);
+#endif