drivers/video/omap2/dss/dss_features.c

   1 /*
   2  * linux/drivers/video/omap2/dss/dss_features.c
   3  *
   4  * Copyright (C) 2010 Texas Instruments
   5  * Author: Archit Taneja <archit@ti.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License version 2 as published by
   9  * the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  14  * more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along with
  17  * this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <linux/kernel.h>
  21 #include <linux/types.h>
  22 #include <linux/err.h>
  23 #include <linux/slab.h>
  24
  25 #include <plat/display.h>
  26 #include <plat/cpu.h>
  27
  28 #include "dss_features.h"
  29
  30 /* Defines a generic omap register field */
  31 struct dss_reg_field {
  32         enum dss_feat_reg_field id;
  33         u8 start, end;
  34 };
  35
  36 struct omap_dss_features {
  37         const struct dss_reg_field *reg_fields;
  38         const int num_reg_fields;
  39
  40         const u32 has_feature;
  41
  42         const int num_mgrs;
  43         const int num_ovls;
  44         const enum omap_display_type *supported_displays;
  45         const enum omap_color_mode *supported_color_modes;
  46 };
  47
  48 /* This struct is assigned to one of the below during initialization */
  49 static struct omap_dss_features *omap_current_dss_features;
  50
  51 static const struct dss_reg_field omap2_dss_reg_fields[] = {
  52         { FEAT_REG_FIRHINC, 11, 0 },
  53         { FEAT_REG_FIRVINC, 27, 16 },
  54         { FEAT_REG_FIFOLOWTHRESHOLD, 8, 0 },
  55         { FEAT_REG_FIFOHIGHTHRESHOLD, 24, 16 },
  56         { FEAT_REG_FIFOSIZE, 8, 0 },
  57 };
  58
  59 static const struct dss_reg_field omap3_dss_reg_fields[] = {
  60         { FEAT_REG_FIRHINC, 12, 0 },
  61         { FEAT_REG_FIRVINC, 28, 16 },
  62         { FEAT_REG_FIFOLOWTHRESHOLD, 11, 0 },
  63         { FEAT_REG_FIFOHIGHTHRESHOLD, 27, 16 },
  64         { FEAT_REG_FIFOSIZE, 10, 0 },
  65 };
  66
  67 static const enum omap_display_type omap2_dss_supported_displays[] = {
  68         /* OMAP_DSS_CHANNEL_LCD */
  69         OMAP_DISPLAY_TYPE_DPI | OMAP_DISPLAY_TYPE_DBI |
  70         OMAP_DISPLAY_TYPE_SDI | OMAP_DISPLAY_TYPE_DSI,
  71
  72         /* OMAP_DSS_CHANNEL_DIGIT */
  73         OMAP_DISPLAY_TYPE_VENC,
  74 };
  75
  76 static const enum omap_display_type omap3_dss_supported_displays[] = {
  77         /* OMAP_DSS_CHANNEL_LCD */
  78         OMAP_DISPLAY_TYPE_DPI | OMAP_DISPLAY_TYPE_DBI |
  79         OMAP_DISPLAY_TYPE_SDI | OMAP_DISPLAY_TYPE_DSI,
  80
  81         /* OMAP_DSS_CHANNEL_DIGIT */
  82         OMAP_DISPLAY_TYPE_VENC,
  83 };
  84
  85 static const enum omap_color_mode omap2_dss_supported_color_modes[] = {
  86         /* OMAP_DSS_GFX */
  87         OMAP_DSS_COLOR_CLUT1 | OMAP_DSS_COLOR_CLUT2 |
  88         OMAP_DSS_COLOR_CLUT4 | OMAP_DSS_COLOR_CLUT8 |
  89         OMAP_DSS_COLOR_RGB12U | OMAP_DSS_COLOR_RGB16 |
  90         OMAP_DSS_COLOR_RGB24U | OMAP_DSS_COLOR_RGB24P,
  91
  92         /* OMAP_DSS_VIDEO1 */
  93         OMAP_DSS_COLOR_RGB16 | OMAP_DSS_COLOR_RGB24U |
  94         OMAP_DSS_COLOR_RGB24P | OMAP_DSS_COLOR_YUV2 |
  95         OMAP_DSS_COLOR_UYVY,
  96
  97         /* OMAP_DSS_VIDEO2 */
  98         OMAP_DSS_COLOR_RGB16 | OMAP_DSS_COLOR_RGB24U |
  99         OMAP_DSS_COLOR_RGB24P | OMAP_DSS_COLOR_YUV2 |
 100         OMAP_DSS_COLOR_UYVY,
 101 };
 102
 103 static const enum omap_color_mode omap3_dss_supported_color_modes[] = {
 104         /* OMAP_DSS_GFX */
 105         OMAP_DSS_COLOR_CLUT1 | OMAP_DSS_COLOR_CLUT2 |
 106         OMAP_DSS_COLOR_CLUT4 | OMAP_DSS_COLOR_CLUT8 |
 107         OMAP_DSS_COLOR_RGB12U | OMAP_DSS_COLOR_ARGB16 |
 108         OMAP_DSS_COLOR_RGB16 | OMAP_DSS_COLOR_RGB24U |
 109         OMAP_DSS_COLOR_RGB24P | OMAP_DSS_COLOR_ARGB32 |
 110         OMAP_DSS_COLOR_RGBA32 | OMAP_DSS_COLOR_RGBX32,
 111
 112         /* OMAP_DSS_VIDEO1 */
 113         OMAP_DSS_COLOR_RGB24U | OMAP_DSS_COLOR_RGB24P |
 114         OMAP_DSS_COLOR_RGB12U | OMAP_DSS_COLOR_RGB16 |
 115         OMAP_DSS_COLOR_YUV2 | OMAP_DSS_COLOR_UYVY,
 116
 117         /* OMAP_DSS_VIDEO2 */
 118         OMAP_DSS_COLOR_RGB12U | OMAP_DSS_COLOR_ARGB16 |
 119         OMAP_DSS_COLOR_RGB16 | OMAP_DSS_COLOR_RGB24U |
 120         OMAP_DSS_COLOR_RGB24P | OMAP_DSS_COLOR_YUV2 |
 121         OMAP_DSS_COLOR_UYVY | OMAP_DSS_COLOR_ARGB32 |
 122         OMAP_DSS_COLOR_RGBA32 | OMAP_DSS_COLOR_RGBX32,
 123 };
 124
 125 /* OMAP2 DSS Features */
 126 static struct omap_dss_features omap2_dss_features = {
 127         .reg_fields = omap2_dss_reg_fields,
 128         .num_reg_fields = ARRAY_SIZE(omap2_dss_reg_fields),
 129
 130         .num_mgrs = 2,
 131         .num_ovls = 3,
 132         .supported_displays = omap2_dss_supported_displays,
 133         .supported_color_modes = omap2_dss_supported_color_modes,
 134 };
 135
 136 /* OMAP3 DSS Features */
 137 static struct omap_dss_features omap3_dss_features = {
 138         .reg_fields = omap3_dss_reg_fields,
 139         .num_reg_fields = ARRAY_SIZE(omap3_dss_reg_fields),
 140
 141         .has_feature    = FEAT_GLOBAL_ALPHA,
 142
 143         .num_mgrs = 2,
 144         .num_ovls = 3,
 145         .supported_displays = omap3_dss_supported_displays,
 146         .supported_color_modes = omap3_dss_supported_color_modes,
 147 };
 148
 149 /* Functions returning values related to a DSS feature */
 150 int dss_feat_get_num_mgrs(void)
 151 {
 152         return omap_current_dss_features->num_mgrs;
 153 }
 154
 155 int dss_feat_get_num_ovls(void)
 156 {
 157         return omap_current_dss_features->num_ovls;
 158 }
 159
 160 enum omap_display_type dss_feat_get_supported_displays(enum omap_channel channel)
 161 {
 162         return omap_current_dss_features->supported_displays[channel];
 163 }
 164
 165 enum omap_color_mode dss_feat_get_supported_color_modes(enum omap_plane plane)
 166 {
 167         return omap_current_dss_features->supported_color_modes[plane];
 168 }
 169
 170 /* DSS has_feature check */
 171 bool dss_has_feature(enum dss_feat_id id)
 172 {
 173         return omap_current_dss_features->has_feature & id;
 174 }
 175
 176 void dss_feat_get_reg_field(enum dss_feat_reg_field id, u8 *start, u8 *end)
 177 {
 178         if (id >= omap_current_dss_features->num_reg_fields)
 179                 BUG();
 180
 181         *start = omap_current_dss_features->reg_fields[id].start;
 182         *end = omap_current_dss_features->reg_fields[id].end;
 183 }
 184
 185 void dss_features_init(void)
 186 {
 187         if (cpu_is_omap24xx())
 188                 omap_current_dss_features = &omap2_dss_features;
 189         else
 190                 omap_current_dss_features = &omap3_dss_features;
 191 }