Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 1 | /* |
| 2 | * linux/drivers/video/omap2/dss/dss.c |
| 3 | * |
| 4 | * Copyright (C) 2009 Nokia Corporation |
| 5 | * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com> |
| 6 | * |
| 7 | * Some code and ideas taken from drivers/video/omap/ driver |
| 8 | * by Imre Deak. |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or modify it |
| 11 | * under the terms of the GNU General Public License version 2 as published by |
| 12 | * the Free Software Foundation. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, but WITHOUT |
| 15 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 16 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 17 | * more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License along with |
| 20 | * this program. If not, see <http://www.gnu.org/licenses/>. |
| 21 | */ |
| 22 | |
| 23 | #define DSS_SUBSYS_NAME "DSS" |
| 24 | |
| 25 | #include <linux/kernel.h> |
| 26 | #include <linux/io.h> |
| 27 | #include <linux/err.h> |
| 28 | #include <linux/delay.h> |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 29 | #include <linux/seq_file.h> |
| 30 | #include <linux/clk.h> |
Tomi Valkeinen | 24e6289 | 2011-05-23 11:51:18 +0300 | [diff] [blame^] | 31 | #include <linux/platform_device.h> |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 32 | |
Tomi Valkeinen | a0b38cc | 2011-05-11 14:05:07 +0300 | [diff] [blame] | 33 | #include <video/omapdss.h> |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 34 | #include <plat/clock.h> |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 35 | #include "dss.h" |
Tomi Valkeinen | 6ec549e | 2011-02-24 14:18:50 +0200 | [diff] [blame] | 36 | #include "dss_features.h" |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 37 | |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 38 | #define DSS_SZ_REGS SZ_512 |
| 39 | |
| 40 | struct dss_reg { |
| 41 | u16 idx; |
| 42 | }; |
| 43 | |
| 44 | #define DSS_REG(idx) ((const struct dss_reg) { idx }) |
| 45 | |
| 46 | #define DSS_REVISION DSS_REG(0x0000) |
| 47 | #define DSS_SYSCONFIG DSS_REG(0x0010) |
| 48 | #define DSS_SYSSTATUS DSS_REG(0x0014) |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 49 | #define DSS_CONTROL DSS_REG(0x0040) |
| 50 | #define DSS_SDI_CONTROL DSS_REG(0x0044) |
| 51 | #define DSS_PLL_CONTROL DSS_REG(0x0048) |
| 52 | #define DSS_SDI_STATUS DSS_REG(0x005C) |
| 53 | |
| 54 | #define REG_GET(idx, start, end) \ |
| 55 | FLD_GET(dss_read_reg(idx), start, end) |
| 56 | |
| 57 | #define REG_FLD_MOD(idx, val, start, end) \ |
| 58 | dss_write_reg(idx, FLD_MOD(dss_read_reg(idx), val, start, end)) |
| 59 | |
| 60 | static struct { |
Senthilvadivu Guruswamy | 96c401b | 2011-01-24 06:21:57 +0000 | [diff] [blame] | 61 | struct platform_device *pdev; |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 62 | void __iomem *base; |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 63 | int ctx_id; |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 64 | |
| 65 | struct clk *dpll4_m4_ck; |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 66 | struct clk *dss_ick; |
Archit Taneja | c7642f6 | 2011-01-31 16:27:45 +0000 | [diff] [blame] | 67 | struct clk *dss_fck; |
| 68 | struct clk *dss_sys_clk; |
| 69 | struct clk *dss_tv_fck; |
| 70 | struct clk *dss_video_fck; |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 71 | unsigned num_clks_enabled; |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 72 | |
| 73 | unsigned long cache_req_pck; |
| 74 | unsigned long cache_prate; |
| 75 | struct dss_clock_info cache_dss_cinfo; |
| 76 | struct dispc_clock_info cache_dispc_cinfo; |
| 77 | |
Archit Taneja | 5a8b572 | 2011-05-12 17:26:29 +0530 | [diff] [blame] | 78 | enum omap_dss_clk_source dsi_clk_source[MAX_NUM_DSI]; |
Archit Taneja | 89a35e5 | 2011-04-12 13:52:23 +0530 | [diff] [blame] | 79 | enum omap_dss_clk_source dispc_clk_source; |
| 80 | enum omap_dss_clk_source lcd_clk_source[MAX_DSS_LCD_MANAGERS]; |
Tomi Valkeinen | 2f18c4d | 2010-01-08 18:00:36 +0200 | [diff] [blame] | 81 | |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 82 | u32 ctx[DSS_SZ_REGS / sizeof(u32)]; |
| 83 | } dss; |
| 84 | |
Taneja, Archit | 235e7db | 2011-03-14 23:28:21 -0500 | [diff] [blame] | 85 | static const char * const dss_generic_clk_source_names[] = { |
Archit Taneja | 89a35e5 | 2011-04-12 13:52:23 +0530 | [diff] [blame] | 86 | [OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC] = "DSI_PLL_HSDIV_DISPC", |
| 87 | [OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DSI] = "DSI_PLL_HSDIV_DSI", |
| 88 | [OMAP_DSS_CLK_SRC_FCK] = "DSS_FCK", |
Archit Taneja | 067a57e | 2011-03-02 11:57:25 +0530 | [diff] [blame] | 89 | }; |
| 90 | |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 91 | static void dss_clk_enable_all_no_ctx(void); |
| 92 | static void dss_clk_disable_all_no_ctx(void); |
| 93 | static void dss_clk_enable_no_ctx(enum dss_clock clks); |
| 94 | static void dss_clk_disable_no_ctx(enum dss_clock clks); |
| 95 | |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 96 | static int _omap_dss_wait_reset(void); |
| 97 | |
| 98 | static inline void dss_write_reg(const struct dss_reg idx, u32 val) |
| 99 | { |
| 100 | __raw_writel(val, dss.base + idx.idx); |
| 101 | } |
| 102 | |
| 103 | static inline u32 dss_read_reg(const struct dss_reg idx) |
| 104 | { |
| 105 | return __raw_readl(dss.base + idx.idx); |
| 106 | } |
| 107 | |
| 108 | #define SR(reg) \ |
| 109 | dss.ctx[(DSS_##reg).idx / sizeof(u32)] = dss_read_reg(DSS_##reg) |
| 110 | #define RR(reg) \ |
| 111 | dss_write_reg(DSS_##reg, dss.ctx[(DSS_##reg).idx / sizeof(u32)]) |
| 112 | |
| 113 | void dss_save_context(void) |
| 114 | { |
| 115 | if (cpu_is_omap24xx()) |
| 116 | return; |
| 117 | |
| 118 | SR(SYSCONFIG); |
| 119 | SR(CONTROL); |
| 120 | |
Tomi Valkeinen | 6ec549e | 2011-02-24 14:18:50 +0200 | [diff] [blame] | 121 | if (dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_LCD) & |
| 122 | OMAP_DISPLAY_TYPE_SDI) { |
| 123 | SR(SDI_CONTROL); |
| 124 | SR(PLL_CONTROL); |
| 125 | } |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 126 | } |
| 127 | |
| 128 | void dss_restore_context(void) |
| 129 | { |
| 130 | if (_omap_dss_wait_reset()) |
| 131 | DSSERR("DSS not coming out of reset after sleep\n"); |
| 132 | |
| 133 | RR(SYSCONFIG); |
| 134 | RR(CONTROL); |
| 135 | |
Tomi Valkeinen | 6ec549e | 2011-02-24 14:18:50 +0200 | [diff] [blame] | 136 | if (dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_LCD) & |
| 137 | OMAP_DISPLAY_TYPE_SDI) { |
| 138 | RR(SDI_CONTROL); |
| 139 | RR(PLL_CONTROL); |
| 140 | } |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 141 | } |
| 142 | |
| 143 | #undef SR |
| 144 | #undef RR |
| 145 | |
| 146 | void dss_sdi_init(u8 datapairs) |
| 147 | { |
| 148 | u32 l; |
| 149 | |
| 150 | BUG_ON(datapairs > 3 || datapairs < 1); |
| 151 | |
| 152 | l = dss_read_reg(DSS_SDI_CONTROL); |
| 153 | l = FLD_MOD(l, 0xf, 19, 15); /* SDI_PDIV */ |
| 154 | l = FLD_MOD(l, datapairs-1, 3, 2); /* SDI_PRSEL */ |
| 155 | l = FLD_MOD(l, 2, 1, 0); /* SDI_BWSEL */ |
| 156 | dss_write_reg(DSS_SDI_CONTROL, l); |
| 157 | |
| 158 | l = dss_read_reg(DSS_PLL_CONTROL); |
| 159 | l = FLD_MOD(l, 0x7, 25, 22); /* SDI_PLL_FREQSEL */ |
| 160 | l = FLD_MOD(l, 0xb, 16, 11); /* SDI_PLL_REGN */ |
| 161 | l = FLD_MOD(l, 0xb4, 10, 1); /* SDI_PLL_REGM */ |
| 162 | dss_write_reg(DSS_PLL_CONTROL, l); |
| 163 | } |
| 164 | |
| 165 | int dss_sdi_enable(void) |
| 166 | { |
| 167 | unsigned long timeout; |
| 168 | |
| 169 | dispc_pck_free_enable(1); |
| 170 | |
| 171 | /* Reset SDI PLL */ |
| 172 | REG_FLD_MOD(DSS_PLL_CONTROL, 1, 18, 18); /* SDI_PLL_SYSRESET */ |
| 173 | udelay(1); /* wait 2x PCLK */ |
| 174 | |
| 175 | /* Lock SDI PLL */ |
| 176 | REG_FLD_MOD(DSS_PLL_CONTROL, 1, 28, 28); /* SDI_PLL_GOBIT */ |
| 177 | |
| 178 | /* Waiting for PLL lock request to complete */ |
| 179 | timeout = jiffies + msecs_to_jiffies(500); |
| 180 | while (dss_read_reg(DSS_SDI_STATUS) & (1 << 6)) { |
| 181 | if (time_after_eq(jiffies, timeout)) { |
| 182 | DSSERR("PLL lock request timed out\n"); |
| 183 | goto err1; |
| 184 | } |
| 185 | } |
| 186 | |
| 187 | /* Clearing PLL_GO bit */ |
| 188 | REG_FLD_MOD(DSS_PLL_CONTROL, 0, 28, 28); |
| 189 | |
| 190 | /* Waiting for PLL to lock */ |
| 191 | timeout = jiffies + msecs_to_jiffies(500); |
| 192 | while (!(dss_read_reg(DSS_SDI_STATUS) & (1 << 5))) { |
| 193 | if (time_after_eq(jiffies, timeout)) { |
| 194 | DSSERR("PLL lock timed out\n"); |
| 195 | goto err1; |
| 196 | } |
| 197 | } |
| 198 | |
| 199 | dispc_lcd_enable_signal(1); |
| 200 | |
| 201 | /* Waiting for SDI reset to complete */ |
| 202 | timeout = jiffies + msecs_to_jiffies(500); |
| 203 | while (!(dss_read_reg(DSS_SDI_STATUS) & (1 << 2))) { |
| 204 | if (time_after_eq(jiffies, timeout)) { |
| 205 | DSSERR("SDI reset timed out\n"); |
| 206 | goto err2; |
| 207 | } |
| 208 | } |
| 209 | |
| 210 | return 0; |
| 211 | |
| 212 | err2: |
| 213 | dispc_lcd_enable_signal(0); |
| 214 | err1: |
| 215 | /* Reset SDI PLL */ |
| 216 | REG_FLD_MOD(DSS_PLL_CONTROL, 0, 18, 18); /* SDI_PLL_SYSRESET */ |
| 217 | |
| 218 | dispc_pck_free_enable(0); |
| 219 | |
| 220 | return -ETIMEDOUT; |
| 221 | } |
| 222 | |
| 223 | void dss_sdi_disable(void) |
| 224 | { |
| 225 | dispc_lcd_enable_signal(0); |
| 226 | |
| 227 | dispc_pck_free_enable(0); |
| 228 | |
| 229 | /* Reset SDI PLL */ |
| 230 | REG_FLD_MOD(DSS_PLL_CONTROL, 0, 18, 18); /* SDI_PLL_SYSRESET */ |
| 231 | } |
| 232 | |
Archit Taneja | 89a35e5 | 2011-04-12 13:52:23 +0530 | [diff] [blame] | 233 | const char *dss_get_generic_clk_source_name(enum omap_dss_clk_source clk_src) |
Archit Taneja | 067a57e | 2011-03-02 11:57:25 +0530 | [diff] [blame] | 234 | { |
Taneja, Archit | 235e7db | 2011-03-14 23:28:21 -0500 | [diff] [blame] | 235 | return dss_generic_clk_source_names[clk_src]; |
Archit Taneja | 067a57e | 2011-03-02 11:57:25 +0530 | [diff] [blame] | 236 | } |
| 237 | |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 238 | void dss_dump_clocks(struct seq_file *s) |
| 239 | { |
| 240 | unsigned long dpll4_ck_rate; |
| 241 | unsigned long dpll4_m4_ck_rate; |
Tomi Valkeinen | 0acf659 | 2011-03-14 07:28:57 -0500 | [diff] [blame] | 242 | const char *fclk_name, *fclk_real_name; |
| 243 | unsigned long fclk_rate; |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 244 | |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 245 | dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK); |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 246 | |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 247 | seq_printf(s, "- DSS -\n"); |
| 248 | |
Archit Taneja | 89a35e5 | 2011-04-12 13:52:23 +0530 | [diff] [blame] | 249 | fclk_name = dss_get_generic_clk_source_name(OMAP_DSS_CLK_SRC_FCK); |
| 250 | fclk_real_name = dss_feat_get_clk_source_name(OMAP_DSS_CLK_SRC_FCK); |
Tomi Valkeinen | 0acf659 | 2011-03-14 07:28:57 -0500 | [diff] [blame] | 251 | fclk_rate = dss_clk_get_rate(DSS_CLK_FCK); |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 252 | |
Tomi Valkeinen | 0acf659 | 2011-03-14 07:28:57 -0500 | [diff] [blame] | 253 | if (dss.dpll4_m4_ck) { |
| 254 | dpll4_ck_rate = clk_get_rate(clk_get_parent(dss.dpll4_m4_ck)); |
| 255 | dpll4_m4_ck_rate = clk_get_rate(dss.dpll4_m4_ck); |
| 256 | |
| 257 | seq_printf(s, "dpll4_ck %lu\n", dpll4_ck_rate); |
| 258 | |
Murthy, Raghuveer | 2de1108 | 2011-03-14 07:28:58 -0500 | [diff] [blame] | 259 | if (cpu_is_omap3630() || cpu_is_omap44xx()) |
Tomi Valkeinen | 0acf659 | 2011-03-14 07:28:57 -0500 | [diff] [blame] | 260 | seq_printf(s, "%s (%s) = %lu / %lu = %lu\n", |
| 261 | fclk_name, fclk_real_name, |
| 262 | dpll4_ck_rate, |
| 263 | dpll4_ck_rate / dpll4_m4_ck_rate, |
| 264 | fclk_rate); |
| 265 | else |
| 266 | seq_printf(s, "%s (%s) = %lu / %lu * 2 = %lu\n", |
| 267 | fclk_name, fclk_real_name, |
| 268 | dpll4_ck_rate, |
| 269 | dpll4_ck_rate / dpll4_m4_ck_rate, |
| 270 | fclk_rate); |
| 271 | } else { |
| 272 | seq_printf(s, "%s (%s) = %lu\n", |
| 273 | fclk_name, fclk_real_name, |
| 274 | fclk_rate); |
| 275 | } |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 276 | |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 277 | dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK); |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 278 | } |
| 279 | |
| 280 | void dss_dump_regs(struct seq_file *s) |
| 281 | { |
| 282 | #define DUMPREG(r) seq_printf(s, "%-35s %08x\n", #r, dss_read_reg(r)) |
| 283 | |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 284 | dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK); |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 285 | |
| 286 | DUMPREG(DSS_REVISION); |
| 287 | DUMPREG(DSS_SYSCONFIG); |
| 288 | DUMPREG(DSS_SYSSTATUS); |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 289 | DUMPREG(DSS_CONTROL); |
Tomi Valkeinen | 6ec549e | 2011-02-24 14:18:50 +0200 | [diff] [blame] | 290 | |
| 291 | if (dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_LCD) & |
| 292 | OMAP_DISPLAY_TYPE_SDI) { |
| 293 | DUMPREG(DSS_SDI_CONTROL); |
| 294 | DUMPREG(DSS_PLL_CONTROL); |
| 295 | DUMPREG(DSS_SDI_STATUS); |
| 296 | } |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 297 | |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 298 | dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK); |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 299 | #undef DUMPREG |
| 300 | } |
| 301 | |
Archit Taneja | 89a35e5 | 2011-04-12 13:52:23 +0530 | [diff] [blame] | 302 | void dss_select_dispc_clk_source(enum omap_dss_clk_source clk_src) |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 303 | { |
Archit Taneja | a72b64b | 2011-05-12 17:26:26 +0530 | [diff] [blame] | 304 | struct platform_device *dsidev; |
Tomi Valkeinen | 2f18c4d | 2010-01-08 18:00:36 +0200 | [diff] [blame] | 305 | int b; |
Taneja, Archit | ea75159 | 2011-03-08 05:50:35 -0600 | [diff] [blame] | 306 | u8 start, end; |
Tomi Valkeinen | 2f18c4d | 2010-01-08 18:00:36 +0200 | [diff] [blame] | 307 | |
Taneja, Archit | 66534e8 | 2011-03-08 05:50:34 -0600 | [diff] [blame] | 308 | switch (clk_src) { |
Archit Taneja | 89a35e5 | 2011-04-12 13:52:23 +0530 | [diff] [blame] | 309 | case OMAP_DSS_CLK_SRC_FCK: |
Taneja, Archit | 66534e8 | 2011-03-08 05:50:34 -0600 | [diff] [blame] | 310 | b = 0; |
| 311 | break; |
Archit Taneja | 89a35e5 | 2011-04-12 13:52:23 +0530 | [diff] [blame] | 312 | case OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC: |
Taneja, Archit | 66534e8 | 2011-03-08 05:50:34 -0600 | [diff] [blame] | 313 | b = 1; |
Archit Taneja | a72b64b | 2011-05-12 17:26:26 +0530 | [diff] [blame] | 314 | dsidev = dsi_get_dsidev_from_id(0); |
| 315 | dsi_wait_pll_hsdiv_dispc_active(dsidev); |
Taneja, Archit | 66534e8 | 2011-03-08 05:50:34 -0600 | [diff] [blame] | 316 | break; |
Archit Taneja | 5a8b572 | 2011-05-12 17:26:29 +0530 | [diff] [blame] | 317 | case OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DISPC: |
| 318 | b = 2; |
| 319 | dsidev = dsi_get_dsidev_from_id(1); |
| 320 | dsi_wait_pll_hsdiv_dispc_active(dsidev); |
| 321 | break; |
Taneja, Archit | 66534e8 | 2011-03-08 05:50:34 -0600 | [diff] [blame] | 322 | default: |
| 323 | BUG(); |
| 324 | } |
Tomi Valkeinen | e406f90 | 2010-06-09 15:28:12 +0300 | [diff] [blame] | 325 | |
Taneja, Archit | ea75159 | 2011-03-08 05:50:35 -0600 | [diff] [blame] | 326 | dss_feat_get_reg_field(FEAT_REG_DISPC_CLK_SWITCH, &start, &end); |
| 327 | |
| 328 | REG_FLD_MOD(DSS_CONTROL, b, start, end); /* DISPC_CLK_SWITCH */ |
Tomi Valkeinen | 2f18c4d | 2010-01-08 18:00:36 +0200 | [diff] [blame] | 329 | |
| 330 | dss.dispc_clk_source = clk_src; |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 331 | } |
| 332 | |
Archit Taneja | 5a8b572 | 2011-05-12 17:26:29 +0530 | [diff] [blame] | 333 | void dss_select_dsi_clk_source(int dsi_module, |
| 334 | enum omap_dss_clk_source clk_src) |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 335 | { |
Archit Taneja | a72b64b | 2011-05-12 17:26:26 +0530 | [diff] [blame] | 336 | struct platform_device *dsidev; |
Tomi Valkeinen | 2f18c4d | 2010-01-08 18:00:36 +0200 | [diff] [blame] | 337 | int b; |
| 338 | |
Taneja, Archit | 66534e8 | 2011-03-08 05:50:34 -0600 | [diff] [blame] | 339 | switch (clk_src) { |
Archit Taneja | 89a35e5 | 2011-04-12 13:52:23 +0530 | [diff] [blame] | 340 | case OMAP_DSS_CLK_SRC_FCK: |
Taneja, Archit | 66534e8 | 2011-03-08 05:50:34 -0600 | [diff] [blame] | 341 | b = 0; |
| 342 | break; |
Archit Taneja | 89a35e5 | 2011-04-12 13:52:23 +0530 | [diff] [blame] | 343 | case OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DSI: |
Archit Taneja | 5a8b572 | 2011-05-12 17:26:29 +0530 | [diff] [blame] | 344 | BUG_ON(dsi_module != 0); |
Taneja, Archit | 66534e8 | 2011-03-08 05:50:34 -0600 | [diff] [blame] | 345 | b = 1; |
Archit Taneja | a72b64b | 2011-05-12 17:26:26 +0530 | [diff] [blame] | 346 | dsidev = dsi_get_dsidev_from_id(0); |
| 347 | dsi_wait_pll_hsdiv_dsi_active(dsidev); |
Taneja, Archit | 66534e8 | 2011-03-08 05:50:34 -0600 | [diff] [blame] | 348 | break; |
Archit Taneja | 5a8b572 | 2011-05-12 17:26:29 +0530 | [diff] [blame] | 349 | case OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DSI: |
| 350 | BUG_ON(dsi_module != 1); |
| 351 | b = 1; |
| 352 | dsidev = dsi_get_dsidev_from_id(1); |
| 353 | dsi_wait_pll_hsdiv_dsi_active(dsidev); |
| 354 | break; |
Taneja, Archit | 66534e8 | 2011-03-08 05:50:34 -0600 | [diff] [blame] | 355 | default: |
| 356 | BUG(); |
| 357 | } |
Tomi Valkeinen | e406f90 | 2010-06-09 15:28:12 +0300 | [diff] [blame] | 358 | |
Tomi Valkeinen | 2f18c4d | 2010-01-08 18:00:36 +0200 | [diff] [blame] | 359 | REG_FLD_MOD(DSS_CONTROL, b, 1, 1); /* DSI_CLK_SWITCH */ |
| 360 | |
Archit Taneja | 5a8b572 | 2011-05-12 17:26:29 +0530 | [diff] [blame] | 361 | dss.dsi_clk_source[dsi_module] = clk_src; |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 362 | } |
| 363 | |
Taneja, Archit | ea75159 | 2011-03-08 05:50:35 -0600 | [diff] [blame] | 364 | void dss_select_lcd_clk_source(enum omap_channel channel, |
Archit Taneja | 89a35e5 | 2011-04-12 13:52:23 +0530 | [diff] [blame] | 365 | enum omap_dss_clk_source clk_src) |
Taneja, Archit | ea75159 | 2011-03-08 05:50:35 -0600 | [diff] [blame] | 366 | { |
Archit Taneja | a72b64b | 2011-05-12 17:26:26 +0530 | [diff] [blame] | 367 | struct platform_device *dsidev; |
Taneja, Archit | ea75159 | 2011-03-08 05:50:35 -0600 | [diff] [blame] | 368 | int b, ix, pos; |
| 369 | |
| 370 | if (!dss_has_feature(FEAT_LCD_CLK_SRC)) |
| 371 | return; |
| 372 | |
| 373 | switch (clk_src) { |
Archit Taneja | 89a35e5 | 2011-04-12 13:52:23 +0530 | [diff] [blame] | 374 | case OMAP_DSS_CLK_SRC_FCK: |
Taneja, Archit | ea75159 | 2011-03-08 05:50:35 -0600 | [diff] [blame] | 375 | b = 0; |
| 376 | break; |
Archit Taneja | 89a35e5 | 2011-04-12 13:52:23 +0530 | [diff] [blame] | 377 | case OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC: |
Taneja, Archit | ea75159 | 2011-03-08 05:50:35 -0600 | [diff] [blame] | 378 | BUG_ON(channel != OMAP_DSS_CHANNEL_LCD); |
| 379 | b = 1; |
Archit Taneja | a72b64b | 2011-05-12 17:26:26 +0530 | [diff] [blame] | 380 | dsidev = dsi_get_dsidev_from_id(0); |
| 381 | dsi_wait_pll_hsdiv_dispc_active(dsidev); |
Taneja, Archit | ea75159 | 2011-03-08 05:50:35 -0600 | [diff] [blame] | 382 | break; |
Archit Taneja | 5a8b572 | 2011-05-12 17:26:29 +0530 | [diff] [blame] | 383 | case OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DISPC: |
| 384 | BUG_ON(channel != OMAP_DSS_CHANNEL_LCD2); |
| 385 | b = 1; |
| 386 | dsidev = dsi_get_dsidev_from_id(1); |
| 387 | dsi_wait_pll_hsdiv_dispc_active(dsidev); |
| 388 | break; |
Taneja, Archit | ea75159 | 2011-03-08 05:50:35 -0600 | [diff] [blame] | 389 | default: |
| 390 | BUG(); |
| 391 | } |
| 392 | |
| 393 | pos = channel == OMAP_DSS_CHANNEL_LCD ? 0 : 12; |
| 394 | REG_FLD_MOD(DSS_CONTROL, b, pos, pos); /* LCDx_CLK_SWITCH */ |
| 395 | |
| 396 | ix = channel == OMAP_DSS_CHANNEL_LCD ? 0 : 1; |
| 397 | dss.lcd_clk_source[ix] = clk_src; |
| 398 | } |
| 399 | |
Archit Taneja | 89a35e5 | 2011-04-12 13:52:23 +0530 | [diff] [blame] | 400 | enum omap_dss_clk_source dss_get_dispc_clk_source(void) |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 401 | { |
Tomi Valkeinen | 2f18c4d | 2010-01-08 18:00:36 +0200 | [diff] [blame] | 402 | return dss.dispc_clk_source; |
| 403 | } |
| 404 | |
Archit Taneja | 5a8b572 | 2011-05-12 17:26:29 +0530 | [diff] [blame] | 405 | enum omap_dss_clk_source dss_get_dsi_clk_source(int dsi_module) |
Tomi Valkeinen | 2f18c4d | 2010-01-08 18:00:36 +0200 | [diff] [blame] | 406 | { |
Archit Taneja | 5a8b572 | 2011-05-12 17:26:29 +0530 | [diff] [blame] | 407 | return dss.dsi_clk_source[dsi_module]; |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 408 | } |
| 409 | |
Archit Taneja | 89a35e5 | 2011-04-12 13:52:23 +0530 | [diff] [blame] | 410 | enum omap_dss_clk_source dss_get_lcd_clk_source(enum omap_channel channel) |
Taneja, Archit | ea75159 | 2011-03-08 05:50:35 -0600 | [diff] [blame] | 411 | { |
Archit Taneja | 89976f2 | 2011-03-31 13:23:35 +0530 | [diff] [blame] | 412 | if (dss_has_feature(FEAT_LCD_CLK_SRC)) { |
| 413 | int ix = channel == OMAP_DSS_CHANNEL_LCD ? 0 : 1; |
| 414 | return dss.lcd_clk_source[ix]; |
| 415 | } else { |
| 416 | /* LCD_CLK source is the same as DISPC_FCLK source for |
| 417 | * OMAP2 and OMAP3 */ |
| 418 | return dss.dispc_clk_source; |
| 419 | } |
Taneja, Archit | ea75159 | 2011-03-08 05:50:35 -0600 | [diff] [blame] | 420 | } |
| 421 | |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 422 | /* calculate clock rates using dividers in cinfo */ |
| 423 | int dss_calc_clock_rates(struct dss_clock_info *cinfo) |
| 424 | { |
Tomi Valkeinen | 0acf659 | 2011-03-14 07:28:57 -0500 | [diff] [blame] | 425 | if (dss.dpll4_m4_ck) { |
| 426 | unsigned long prate; |
Murthy, Raghuveer | 2de1108 | 2011-03-14 07:28:58 -0500 | [diff] [blame] | 427 | u16 fck_div_max = 16; |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 428 | |
Murthy, Raghuveer | 2de1108 | 2011-03-14 07:28:58 -0500 | [diff] [blame] | 429 | if (cpu_is_omap3630() || cpu_is_omap44xx()) |
| 430 | fck_div_max = 32; |
| 431 | |
| 432 | if (cinfo->fck_div > fck_div_max || cinfo->fck_div == 0) |
Tomi Valkeinen | 0acf659 | 2011-03-14 07:28:57 -0500 | [diff] [blame] | 433 | return -EINVAL; |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 434 | |
Tomi Valkeinen | 0acf659 | 2011-03-14 07:28:57 -0500 | [diff] [blame] | 435 | prate = clk_get_rate(clk_get_parent(dss.dpll4_m4_ck)); |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 436 | |
Tomi Valkeinen | 0acf659 | 2011-03-14 07:28:57 -0500 | [diff] [blame] | 437 | cinfo->fck = prate / cinfo->fck_div; |
| 438 | } else { |
| 439 | if (cinfo->fck_div != 0) |
| 440 | return -EINVAL; |
| 441 | cinfo->fck = dss_clk_get_rate(DSS_CLK_FCK); |
| 442 | } |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 443 | |
| 444 | return 0; |
| 445 | } |
| 446 | |
| 447 | int dss_set_clock_div(struct dss_clock_info *cinfo) |
| 448 | { |
Tomi Valkeinen | 0acf659 | 2011-03-14 07:28:57 -0500 | [diff] [blame] | 449 | if (dss.dpll4_m4_ck) { |
| 450 | unsigned long prate; |
| 451 | int r; |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 452 | |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 453 | prate = clk_get_rate(clk_get_parent(dss.dpll4_m4_ck)); |
| 454 | DSSDBG("dpll4_m4 = %ld\n", prate); |
| 455 | |
| 456 | r = clk_set_rate(dss.dpll4_m4_ck, prate / cinfo->fck_div); |
| 457 | if (r) |
| 458 | return r; |
Tomi Valkeinen | 0acf659 | 2011-03-14 07:28:57 -0500 | [diff] [blame] | 459 | } else { |
| 460 | if (cinfo->fck_div != 0) |
| 461 | return -EINVAL; |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 462 | } |
| 463 | |
| 464 | DSSDBG("fck = %ld (%d)\n", cinfo->fck, cinfo->fck_div); |
| 465 | |
| 466 | return 0; |
| 467 | } |
| 468 | |
| 469 | int dss_get_clock_div(struct dss_clock_info *cinfo) |
| 470 | { |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 471 | cinfo->fck = dss_clk_get_rate(DSS_CLK_FCK); |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 472 | |
Tomi Valkeinen | 0acf659 | 2011-03-14 07:28:57 -0500 | [diff] [blame] | 473 | if (dss.dpll4_m4_ck) { |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 474 | unsigned long prate; |
Tomi Valkeinen | 0acf659 | 2011-03-14 07:28:57 -0500 | [diff] [blame] | 475 | |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 476 | prate = clk_get_rate(clk_get_parent(dss.dpll4_m4_ck)); |
Tomi Valkeinen | 0acf659 | 2011-03-14 07:28:57 -0500 | [diff] [blame] | 477 | |
Murthy, Raghuveer | 2de1108 | 2011-03-14 07:28:58 -0500 | [diff] [blame] | 478 | if (cpu_is_omap3630() || cpu_is_omap44xx()) |
Kishore Y | ac01bb7 | 2010-04-25 16:27:19 +0530 | [diff] [blame] | 479 | cinfo->fck_div = prate / (cinfo->fck); |
| 480 | else |
| 481 | cinfo->fck_div = prate / (cinfo->fck / 2); |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 482 | } else { |
| 483 | cinfo->fck_div = 0; |
| 484 | } |
| 485 | |
| 486 | return 0; |
| 487 | } |
| 488 | |
| 489 | unsigned long dss_get_dpll4_rate(void) |
| 490 | { |
Tomi Valkeinen | 0acf659 | 2011-03-14 07:28:57 -0500 | [diff] [blame] | 491 | if (dss.dpll4_m4_ck) |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 492 | return clk_get_rate(clk_get_parent(dss.dpll4_m4_ck)); |
| 493 | else |
| 494 | return 0; |
| 495 | } |
| 496 | |
| 497 | int dss_calc_clock_div(bool is_tft, unsigned long req_pck, |
| 498 | struct dss_clock_info *dss_cinfo, |
| 499 | struct dispc_clock_info *dispc_cinfo) |
| 500 | { |
| 501 | unsigned long prate; |
| 502 | struct dss_clock_info best_dss; |
| 503 | struct dispc_clock_info best_dispc; |
| 504 | |
Archit Taneja | 819d807 | 2011-03-01 11:54:00 +0530 | [diff] [blame] | 505 | unsigned long fck, max_dss_fck; |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 506 | |
Murthy, Raghuveer | 2de1108 | 2011-03-14 07:28:58 -0500 | [diff] [blame] | 507 | u16 fck_div, fck_div_max = 16; |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 508 | |
| 509 | int match = 0; |
| 510 | int min_fck_per_pck; |
| 511 | |
| 512 | prate = dss_get_dpll4_rate(); |
| 513 | |
Taneja, Archit | 31ef823 | 2011-03-14 23:28:22 -0500 | [diff] [blame] | 514 | max_dss_fck = dss_feat_get_param_max(FEAT_PARAM_DSS_FCK); |
Archit Taneja | 819d807 | 2011-03-01 11:54:00 +0530 | [diff] [blame] | 515 | |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 516 | fck = dss_clk_get_rate(DSS_CLK_FCK); |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 517 | if (req_pck == dss.cache_req_pck && |
| 518 | ((cpu_is_omap34xx() && prate == dss.cache_prate) || |
| 519 | dss.cache_dss_cinfo.fck == fck)) { |
| 520 | DSSDBG("dispc clock info found from cache.\n"); |
| 521 | *dss_cinfo = dss.cache_dss_cinfo; |
| 522 | *dispc_cinfo = dss.cache_dispc_cinfo; |
| 523 | return 0; |
| 524 | } |
| 525 | |
| 526 | min_fck_per_pck = CONFIG_OMAP2_DSS_MIN_FCK_PER_PCK; |
| 527 | |
| 528 | if (min_fck_per_pck && |
Archit Taneja | 819d807 | 2011-03-01 11:54:00 +0530 | [diff] [blame] | 529 | req_pck * min_fck_per_pck > max_dss_fck) { |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 530 | DSSERR("Requested pixel clock not possible with the current " |
| 531 | "OMAP2_DSS_MIN_FCK_PER_PCK setting. Turning " |
| 532 | "the constraint off.\n"); |
| 533 | min_fck_per_pck = 0; |
| 534 | } |
| 535 | |
| 536 | retry: |
| 537 | memset(&best_dss, 0, sizeof(best_dss)); |
| 538 | memset(&best_dispc, 0, sizeof(best_dispc)); |
| 539 | |
Murthy, Raghuveer | 2de1108 | 2011-03-14 07:28:58 -0500 | [diff] [blame] | 540 | if (dss.dpll4_m4_ck == NULL) { |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 541 | struct dispc_clock_info cur_dispc; |
| 542 | /* XXX can we change the clock on omap2? */ |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 543 | fck = dss_clk_get_rate(DSS_CLK_FCK); |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 544 | fck_div = 1; |
| 545 | |
| 546 | dispc_find_clk_divs(is_tft, req_pck, fck, &cur_dispc); |
| 547 | match = 1; |
| 548 | |
| 549 | best_dss.fck = fck; |
| 550 | best_dss.fck_div = fck_div; |
| 551 | |
| 552 | best_dispc = cur_dispc; |
| 553 | |
| 554 | goto found; |
Murthy, Raghuveer | 2de1108 | 2011-03-14 07:28:58 -0500 | [diff] [blame] | 555 | } else { |
| 556 | if (cpu_is_omap3630() || cpu_is_omap44xx()) |
| 557 | fck_div_max = 32; |
| 558 | |
| 559 | for (fck_div = fck_div_max; fck_div > 0; --fck_div) { |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 560 | struct dispc_clock_info cur_dispc; |
| 561 | |
Murthy, Raghuveer | 2de1108 | 2011-03-14 07:28:58 -0500 | [diff] [blame] | 562 | if (fck_div_max == 32) |
Kishore Y | ac01bb7 | 2010-04-25 16:27:19 +0530 | [diff] [blame] | 563 | fck = prate / fck_div; |
| 564 | else |
| 565 | fck = prate / fck_div * 2; |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 566 | |
Archit Taneja | 819d807 | 2011-03-01 11:54:00 +0530 | [diff] [blame] | 567 | if (fck > max_dss_fck) |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 568 | continue; |
| 569 | |
| 570 | if (min_fck_per_pck && |
| 571 | fck < req_pck * min_fck_per_pck) |
| 572 | continue; |
| 573 | |
| 574 | match = 1; |
| 575 | |
| 576 | dispc_find_clk_divs(is_tft, req_pck, fck, &cur_dispc); |
| 577 | |
| 578 | if (abs(cur_dispc.pck - req_pck) < |
| 579 | abs(best_dispc.pck - req_pck)) { |
| 580 | |
| 581 | best_dss.fck = fck; |
| 582 | best_dss.fck_div = fck_div; |
| 583 | |
| 584 | best_dispc = cur_dispc; |
| 585 | |
| 586 | if (cur_dispc.pck == req_pck) |
| 587 | goto found; |
| 588 | } |
| 589 | } |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 590 | } |
| 591 | |
| 592 | found: |
| 593 | if (!match) { |
| 594 | if (min_fck_per_pck) { |
| 595 | DSSERR("Could not find suitable clock settings.\n" |
| 596 | "Turning FCK/PCK constraint off and" |
| 597 | "trying again.\n"); |
| 598 | min_fck_per_pck = 0; |
| 599 | goto retry; |
| 600 | } |
| 601 | |
| 602 | DSSERR("Could not find suitable clock settings.\n"); |
| 603 | |
| 604 | return -EINVAL; |
| 605 | } |
| 606 | |
| 607 | if (dss_cinfo) |
| 608 | *dss_cinfo = best_dss; |
| 609 | if (dispc_cinfo) |
| 610 | *dispc_cinfo = best_dispc; |
| 611 | |
| 612 | dss.cache_req_pck = req_pck; |
| 613 | dss.cache_prate = prate; |
| 614 | dss.cache_dss_cinfo = best_dss; |
| 615 | dss.cache_dispc_cinfo = best_dispc; |
| 616 | |
| 617 | return 0; |
| 618 | } |
| 619 | |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 620 | static int _omap_dss_wait_reset(void) |
| 621 | { |
Tomi Valkeinen | 24be78b | 2010-01-07 14:19:48 +0200 | [diff] [blame] | 622 | int t = 0; |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 623 | |
| 624 | while (REG_GET(DSS_SYSSTATUS, 0, 0) == 0) { |
Tomi Valkeinen | 24be78b | 2010-01-07 14:19:48 +0200 | [diff] [blame] | 625 | if (++t > 1000) { |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 626 | DSSERR("soft reset failed\n"); |
| 627 | return -ENODEV; |
| 628 | } |
Tomi Valkeinen | 24be78b | 2010-01-07 14:19:48 +0200 | [diff] [blame] | 629 | udelay(1); |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 630 | } |
| 631 | |
| 632 | return 0; |
| 633 | } |
| 634 | |
| 635 | static int _omap_dss_reset(void) |
| 636 | { |
| 637 | /* Soft reset */ |
| 638 | REG_FLD_MOD(DSS_SYSCONFIG, 1, 1, 1); |
| 639 | return _omap_dss_wait_reset(); |
| 640 | } |
| 641 | |
| 642 | void dss_set_venc_output(enum omap_dss_venc_type type) |
| 643 | { |
| 644 | int l = 0; |
| 645 | |
| 646 | if (type == OMAP_DSS_VENC_TYPE_COMPOSITE) |
| 647 | l = 0; |
| 648 | else if (type == OMAP_DSS_VENC_TYPE_SVIDEO) |
| 649 | l = 1; |
| 650 | else |
| 651 | BUG(); |
| 652 | |
| 653 | /* venc out selection. 0 = comp, 1 = svideo */ |
| 654 | REG_FLD_MOD(DSS_CONTROL, l, 6, 6); |
| 655 | } |
| 656 | |
| 657 | void dss_set_dac_pwrdn_bgz(bool enable) |
| 658 | { |
| 659 | REG_FLD_MOD(DSS_CONTROL, enable, 5, 5); /* DAC Power-Down Control */ |
| 660 | } |
| 661 | |
Mythri P K | 7ed024a | 2011-03-09 16:31:38 +0530 | [diff] [blame] | 662 | void dss_select_hdmi_venc_clk_source(enum dss_hdmi_venc_clk_source_select hdmi) |
| 663 | { |
| 664 | REG_FLD_MOD(DSS_CONTROL, hdmi, 15, 15); /* VENC_HDMI_SWITCH */ |
| 665 | } |
| 666 | |
Tomi Valkeinen | 42c9dee | 2011-03-02 12:29:27 +0200 | [diff] [blame] | 667 | static int dss_init(void) |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 668 | { |
| 669 | int r; |
| 670 | u32 rev; |
Senthilvadivu Guruswamy | ea9da36 | 2011-01-24 06:22:04 +0000 | [diff] [blame] | 671 | struct resource *dss_mem; |
Tomi Valkeinen | 0acf659 | 2011-03-14 07:28:57 -0500 | [diff] [blame] | 672 | struct clk *dpll4_m4_ck; |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 673 | |
Senthilvadivu Guruswamy | ea9da36 | 2011-01-24 06:22:04 +0000 | [diff] [blame] | 674 | dss_mem = platform_get_resource(dss.pdev, IORESOURCE_MEM, 0); |
| 675 | if (!dss_mem) { |
| 676 | DSSERR("can't get IORESOURCE_MEM DSS\n"); |
| 677 | r = -EINVAL; |
| 678 | goto fail0; |
| 679 | } |
| 680 | dss.base = ioremap(dss_mem->start, resource_size(dss_mem)); |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 681 | if (!dss.base) { |
| 682 | DSSERR("can't ioremap DSS\n"); |
| 683 | r = -ENOMEM; |
| 684 | goto fail0; |
| 685 | } |
| 686 | |
Tomi Valkeinen | 42c9dee | 2011-03-02 12:29:27 +0200 | [diff] [blame] | 687 | /* disable LCD and DIGIT output. This seems to fix the synclost |
| 688 | * problem that we get, if the bootloader starts the DSS and |
| 689 | * the kernel resets it */ |
| 690 | omap_writel(omap_readl(0x48050440) & ~0x3, 0x48050440); |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 691 | |
Tomi Valkeinen | f1aafdc | 2010-06-02 17:31:53 +0300 | [diff] [blame] | 692 | #ifdef CONFIG_OMAP2_DSS_SLEEP_BEFORE_RESET |
Tomi Valkeinen | 42c9dee | 2011-03-02 12:29:27 +0200 | [diff] [blame] | 693 | /* We need to wait here a bit, otherwise we sometimes start to |
| 694 | * get synclost errors, and after that only power cycle will |
| 695 | * restore DSS functionality. I have no idea why this happens. |
| 696 | * And we have to wait _before_ resetting the DSS, but after |
| 697 | * enabling clocks. |
Tomi Valkeinen | f1aafdc | 2010-06-02 17:31:53 +0300 | [diff] [blame] | 698 | * |
| 699 | * This bug was at least present on OMAP3430. It's unknown |
| 700 | * if it happens on OMAP2 or OMAP3630. |
Tomi Valkeinen | 42c9dee | 2011-03-02 12:29:27 +0200 | [diff] [blame] | 701 | */ |
| 702 | msleep(50); |
Tomi Valkeinen | f1aafdc | 2010-06-02 17:31:53 +0300 | [diff] [blame] | 703 | #endif |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 704 | |
Tomi Valkeinen | 42c9dee | 2011-03-02 12:29:27 +0200 | [diff] [blame] | 705 | _omap_dss_reset(); |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 706 | |
| 707 | /* autoidle */ |
| 708 | REG_FLD_MOD(DSS_SYSCONFIG, 1, 0, 0); |
| 709 | |
| 710 | /* Select DPLL */ |
| 711 | REG_FLD_MOD(DSS_CONTROL, 0, 0, 0); |
| 712 | |
| 713 | #ifdef CONFIG_OMAP2_DSS_VENC |
| 714 | REG_FLD_MOD(DSS_CONTROL, 1, 4, 4); /* venc dac demen */ |
| 715 | REG_FLD_MOD(DSS_CONTROL, 1, 3, 3); /* venc clock 4x enable */ |
| 716 | REG_FLD_MOD(DSS_CONTROL, 0, 2, 2); /* venc clock mode = normal */ |
| 717 | #endif |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 718 | if (cpu_is_omap34xx()) { |
Tomi Valkeinen | 0acf659 | 2011-03-14 07:28:57 -0500 | [diff] [blame] | 719 | dpll4_m4_ck = clk_get(NULL, "dpll4_m4_ck"); |
| 720 | if (IS_ERR(dpll4_m4_ck)) { |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 721 | DSSERR("Failed to get dpll4_m4_ck\n"); |
Tomi Valkeinen | 0acf659 | 2011-03-14 07:28:57 -0500 | [diff] [blame] | 722 | r = PTR_ERR(dpll4_m4_ck); |
archit taneja | affe360 | 2011-02-23 08:41:03 +0000 | [diff] [blame] | 723 | goto fail1; |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 724 | } |
Murthy, Raghuveer | 2de1108 | 2011-03-14 07:28:58 -0500 | [diff] [blame] | 725 | } else if (cpu_is_omap44xx()) { |
| 726 | dpll4_m4_ck = clk_get(NULL, "dpll_per_m5x2_ck"); |
| 727 | if (IS_ERR(dpll4_m4_ck)) { |
| 728 | DSSERR("Failed to get dpll4_m4_ck\n"); |
| 729 | r = PTR_ERR(dpll4_m4_ck); |
| 730 | goto fail1; |
| 731 | } |
Tomi Valkeinen | 0acf659 | 2011-03-14 07:28:57 -0500 | [diff] [blame] | 732 | } else { /* omap24xx */ |
| 733 | dpll4_m4_ck = NULL; |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 734 | } |
| 735 | |
Tomi Valkeinen | 0acf659 | 2011-03-14 07:28:57 -0500 | [diff] [blame] | 736 | dss.dpll4_m4_ck = dpll4_m4_ck; |
| 737 | |
Archit Taneja | 5a8b572 | 2011-05-12 17:26:29 +0530 | [diff] [blame] | 738 | dss.dsi_clk_source[0] = OMAP_DSS_CLK_SRC_FCK; |
| 739 | dss.dsi_clk_source[1] = OMAP_DSS_CLK_SRC_FCK; |
Archit Taneja | 89a35e5 | 2011-04-12 13:52:23 +0530 | [diff] [blame] | 740 | dss.dispc_clk_source = OMAP_DSS_CLK_SRC_FCK; |
| 741 | dss.lcd_clk_source[0] = OMAP_DSS_CLK_SRC_FCK; |
| 742 | dss.lcd_clk_source[1] = OMAP_DSS_CLK_SRC_FCK; |
Tomi Valkeinen | ce619e1 | 2010-03-12 12:46:05 +0200 | [diff] [blame] | 743 | |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 744 | dss_save_context(); |
| 745 | |
| 746 | rev = dss_read_reg(DSS_REVISION); |
| 747 | printk(KERN_INFO "OMAP DSS rev %d.%d\n", |
| 748 | FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0)); |
| 749 | |
| 750 | return 0; |
| 751 | |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 752 | fail1: |
| 753 | iounmap(dss.base); |
| 754 | fail0: |
| 755 | return r; |
| 756 | } |
| 757 | |
Senthilvadivu Guruswamy | 96c401b | 2011-01-24 06:21:57 +0000 | [diff] [blame] | 758 | static void dss_exit(void) |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 759 | { |
Tomi Valkeinen | 0acf659 | 2011-03-14 07:28:57 -0500 | [diff] [blame] | 760 | if (dss.dpll4_m4_ck) |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 761 | clk_put(dss.dpll4_m4_ck); |
| 762 | |
Tomi Valkeinen | 559d670 | 2009-11-03 11:23:50 +0200 | [diff] [blame] | 763 | iounmap(dss.base); |
| 764 | } |
| 765 | |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 766 | /* CONTEXT */ |
| 767 | static int dss_get_ctx_id(void) |
| 768 | { |
| 769 | struct omap_display_platform_data *pdata = dss.pdev->dev.platform_data; |
| 770 | int r; |
| 771 | |
| 772 | if (!pdata->board_data->get_last_off_on_transaction_id) |
| 773 | return 0; |
| 774 | r = pdata->board_data->get_last_off_on_transaction_id(&dss.pdev->dev); |
| 775 | if (r < 0) { |
| 776 | dev_err(&dss.pdev->dev, "getting transaction ID failed, " |
| 777 | "will force context restore\n"); |
| 778 | r = -1; |
| 779 | } |
| 780 | return r; |
| 781 | } |
| 782 | |
| 783 | int dss_need_ctx_restore(void) |
| 784 | { |
| 785 | int id = dss_get_ctx_id(); |
| 786 | |
| 787 | if (id < 0 || id != dss.ctx_id) { |
| 788 | DSSDBG("ctx id %d -> id %d\n", |
| 789 | dss.ctx_id, id); |
| 790 | dss.ctx_id = id; |
| 791 | return 1; |
| 792 | } else { |
| 793 | return 0; |
| 794 | } |
| 795 | } |
| 796 | |
| 797 | static void save_all_ctx(void) |
| 798 | { |
| 799 | DSSDBG("save context\n"); |
| 800 | |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 801 | dss_clk_enable_no_ctx(DSS_CLK_ICK | DSS_CLK_FCK); |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 802 | |
| 803 | dss_save_context(); |
| 804 | dispc_save_context(); |
| 805 | #ifdef CONFIG_OMAP2_DSS_DSI |
| 806 | dsi_save_context(); |
| 807 | #endif |
| 808 | |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 809 | dss_clk_disable_no_ctx(DSS_CLK_ICK | DSS_CLK_FCK); |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 810 | } |
| 811 | |
| 812 | static void restore_all_ctx(void) |
| 813 | { |
| 814 | DSSDBG("restore context\n"); |
| 815 | |
| 816 | dss_clk_enable_all_no_ctx(); |
| 817 | |
| 818 | dss_restore_context(); |
| 819 | dispc_restore_context(); |
| 820 | #ifdef CONFIG_OMAP2_DSS_DSI |
| 821 | dsi_restore_context(); |
| 822 | #endif |
| 823 | |
| 824 | dss_clk_disable_all_no_ctx(); |
| 825 | } |
| 826 | |
| 827 | static int dss_get_clock(struct clk **clock, const char *clk_name) |
| 828 | { |
| 829 | struct clk *clk; |
| 830 | |
| 831 | clk = clk_get(&dss.pdev->dev, clk_name); |
| 832 | |
| 833 | if (IS_ERR(clk)) { |
| 834 | DSSERR("can't get clock %s", clk_name); |
| 835 | return PTR_ERR(clk); |
| 836 | } |
| 837 | |
| 838 | *clock = clk; |
| 839 | |
| 840 | DSSDBG("clk %s, rate %ld\n", clk_name, clk_get_rate(clk)); |
| 841 | |
| 842 | return 0; |
| 843 | } |
| 844 | |
| 845 | static int dss_get_clocks(void) |
| 846 | { |
| 847 | int r; |
Semwal, Sumit | a1a0dcc | 2011-03-01 02:42:14 -0600 | [diff] [blame] | 848 | struct omap_display_platform_data *pdata = dss.pdev->dev.platform_data; |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 849 | |
| 850 | dss.dss_ick = NULL; |
Archit Taneja | c7642f6 | 2011-01-31 16:27:45 +0000 | [diff] [blame] | 851 | dss.dss_fck = NULL; |
| 852 | dss.dss_sys_clk = NULL; |
| 853 | dss.dss_tv_fck = NULL; |
| 854 | dss.dss_video_fck = NULL; |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 855 | |
| 856 | r = dss_get_clock(&dss.dss_ick, "ick"); |
| 857 | if (r) |
| 858 | goto err; |
| 859 | |
Archit Taneja | c7642f6 | 2011-01-31 16:27:45 +0000 | [diff] [blame] | 860 | r = dss_get_clock(&dss.dss_fck, "fck"); |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 861 | if (r) |
| 862 | goto err; |
| 863 | |
Semwal, Sumit | a1a0dcc | 2011-03-01 02:42:14 -0600 | [diff] [blame] | 864 | if (!pdata->opt_clock_available) { |
| 865 | r = -ENODEV; |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 866 | goto err; |
Semwal, Sumit | a1a0dcc | 2011-03-01 02:42:14 -0600 | [diff] [blame] | 867 | } |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 868 | |
Semwal, Sumit | a1a0dcc | 2011-03-01 02:42:14 -0600 | [diff] [blame] | 869 | if (pdata->opt_clock_available("sys_clk")) { |
| 870 | r = dss_get_clock(&dss.dss_sys_clk, "sys_clk"); |
| 871 | if (r) |
| 872 | goto err; |
| 873 | } |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 874 | |
Semwal, Sumit | a1a0dcc | 2011-03-01 02:42:14 -0600 | [diff] [blame] | 875 | if (pdata->opt_clock_available("tv_clk")) { |
| 876 | r = dss_get_clock(&dss.dss_tv_fck, "tv_clk"); |
| 877 | if (r) |
| 878 | goto err; |
| 879 | } |
| 880 | |
| 881 | if (pdata->opt_clock_available("video_clk")) { |
| 882 | r = dss_get_clock(&dss.dss_video_fck, "video_clk"); |
| 883 | if (r) |
| 884 | goto err; |
| 885 | } |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 886 | |
| 887 | return 0; |
| 888 | |
| 889 | err: |
| 890 | if (dss.dss_ick) |
| 891 | clk_put(dss.dss_ick); |
Archit Taneja | c7642f6 | 2011-01-31 16:27:45 +0000 | [diff] [blame] | 892 | if (dss.dss_fck) |
| 893 | clk_put(dss.dss_fck); |
| 894 | if (dss.dss_sys_clk) |
| 895 | clk_put(dss.dss_sys_clk); |
| 896 | if (dss.dss_tv_fck) |
| 897 | clk_put(dss.dss_tv_fck); |
| 898 | if (dss.dss_video_fck) |
| 899 | clk_put(dss.dss_video_fck); |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 900 | |
| 901 | return r; |
| 902 | } |
| 903 | |
| 904 | static void dss_put_clocks(void) |
| 905 | { |
Archit Taneja | c7642f6 | 2011-01-31 16:27:45 +0000 | [diff] [blame] | 906 | if (dss.dss_video_fck) |
| 907 | clk_put(dss.dss_video_fck); |
Semwal, Sumit | a1a0dcc | 2011-03-01 02:42:14 -0600 | [diff] [blame] | 908 | if (dss.dss_tv_fck) |
| 909 | clk_put(dss.dss_tv_fck); |
| 910 | if (dss.dss_sys_clk) |
| 911 | clk_put(dss.dss_sys_clk); |
Archit Taneja | c7642f6 | 2011-01-31 16:27:45 +0000 | [diff] [blame] | 912 | clk_put(dss.dss_fck); |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 913 | clk_put(dss.dss_ick); |
| 914 | } |
| 915 | |
| 916 | unsigned long dss_clk_get_rate(enum dss_clock clk) |
| 917 | { |
| 918 | switch (clk) { |
| 919 | case DSS_CLK_ICK: |
| 920 | return clk_get_rate(dss.dss_ick); |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 921 | case DSS_CLK_FCK: |
Archit Taneja | c7642f6 | 2011-01-31 16:27:45 +0000 | [diff] [blame] | 922 | return clk_get_rate(dss.dss_fck); |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 923 | case DSS_CLK_SYSCK: |
Archit Taneja | c7642f6 | 2011-01-31 16:27:45 +0000 | [diff] [blame] | 924 | return clk_get_rate(dss.dss_sys_clk); |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 925 | case DSS_CLK_TVFCK: |
Archit Taneja | c7642f6 | 2011-01-31 16:27:45 +0000 | [diff] [blame] | 926 | return clk_get_rate(dss.dss_tv_fck); |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 927 | case DSS_CLK_VIDFCK: |
Archit Taneja | c7642f6 | 2011-01-31 16:27:45 +0000 | [diff] [blame] | 928 | return clk_get_rate(dss.dss_video_fck); |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 929 | } |
| 930 | |
| 931 | BUG(); |
| 932 | return 0; |
| 933 | } |
| 934 | |
| 935 | static unsigned count_clk_bits(enum dss_clock clks) |
| 936 | { |
| 937 | unsigned num_clks = 0; |
| 938 | |
| 939 | if (clks & DSS_CLK_ICK) |
| 940 | ++num_clks; |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 941 | if (clks & DSS_CLK_FCK) |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 942 | ++num_clks; |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 943 | if (clks & DSS_CLK_SYSCK) |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 944 | ++num_clks; |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 945 | if (clks & DSS_CLK_TVFCK) |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 946 | ++num_clks; |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 947 | if (clks & DSS_CLK_VIDFCK) |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 948 | ++num_clks; |
| 949 | |
| 950 | return num_clks; |
| 951 | } |
| 952 | |
| 953 | static void dss_clk_enable_no_ctx(enum dss_clock clks) |
| 954 | { |
| 955 | unsigned num_clks = count_clk_bits(clks); |
| 956 | |
| 957 | if (clks & DSS_CLK_ICK) |
| 958 | clk_enable(dss.dss_ick); |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 959 | if (clks & DSS_CLK_FCK) |
Archit Taneja | c7642f6 | 2011-01-31 16:27:45 +0000 | [diff] [blame] | 960 | clk_enable(dss.dss_fck); |
Semwal, Sumit | a1a0dcc | 2011-03-01 02:42:14 -0600 | [diff] [blame] | 961 | if ((clks & DSS_CLK_SYSCK) && dss.dss_sys_clk) |
Archit Taneja | c7642f6 | 2011-01-31 16:27:45 +0000 | [diff] [blame] | 962 | clk_enable(dss.dss_sys_clk); |
Semwal, Sumit | a1a0dcc | 2011-03-01 02:42:14 -0600 | [diff] [blame] | 963 | if ((clks & DSS_CLK_TVFCK) && dss.dss_tv_fck) |
Archit Taneja | c7642f6 | 2011-01-31 16:27:45 +0000 | [diff] [blame] | 964 | clk_enable(dss.dss_tv_fck); |
Semwal, Sumit | a1a0dcc | 2011-03-01 02:42:14 -0600 | [diff] [blame] | 965 | if ((clks & DSS_CLK_VIDFCK) && dss.dss_video_fck) |
Archit Taneja | c7642f6 | 2011-01-31 16:27:45 +0000 | [diff] [blame] | 966 | clk_enable(dss.dss_video_fck); |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 967 | |
| 968 | dss.num_clks_enabled += num_clks; |
| 969 | } |
| 970 | |
| 971 | void dss_clk_enable(enum dss_clock clks) |
| 972 | { |
| 973 | bool check_ctx = dss.num_clks_enabled == 0; |
| 974 | |
| 975 | dss_clk_enable_no_ctx(clks); |
| 976 | |
Tomi Valkeinen | 85604b0 | 2011-03-03 13:16:23 +0200 | [diff] [blame] | 977 | /* |
| 978 | * HACK: On omap4 the registers may not be accessible right after |
| 979 | * enabling the clocks. At some point this will be handled by |
| 980 | * pm_runtime, but for the time begin this should make things work. |
| 981 | */ |
| 982 | if (cpu_is_omap44xx() && check_ctx) |
| 983 | udelay(10); |
| 984 | |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 985 | if (check_ctx && cpu_is_omap34xx() && dss_need_ctx_restore()) |
| 986 | restore_all_ctx(); |
| 987 | } |
| 988 | |
| 989 | static void dss_clk_disable_no_ctx(enum dss_clock clks) |
| 990 | { |
| 991 | unsigned num_clks = count_clk_bits(clks); |
| 992 | |
| 993 | if (clks & DSS_CLK_ICK) |
| 994 | clk_disable(dss.dss_ick); |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 995 | if (clks & DSS_CLK_FCK) |
Archit Taneja | c7642f6 | 2011-01-31 16:27:45 +0000 | [diff] [blame] | 996 | clk_disable(dss.dss_fck); |
Semwal, Sumit | a1a0dcc | 2011-03-01 02:42:14 -0600 | [diff] [blame] | 997 | if ((clks & DSS_CLK_SYSCK) && dss.dss_sys_clk) |
Archit Taneja | c7642f6 | 2011-01-31 16:27:45 +0000 | [diff] [blame] | 998 | clk_disable(dss.dss_sys_clk); |
Semwal, Sumit | a1a0dcc | 2011-03-01 02:42:14 -0600 | [diff] [blame] | 999 | if ((clks & DSS_CLK_TVFCK) && dss.dss_tv_fck) |
Archit Taneja | c7642f6 | 2011-01-31 16:27:45 +0000 | [diff] [blame] | 1000 | clk_disable(dss.dss_tv_fck); |
Semwal, Sumit | a1a0dcc | 2011-03-01 02:42:14 -0600 | [diff] [blame] | 1001 | if ((clks & DSS_CLK_VIDFCK) && dss.dss_video_fck) |
Archit Taneja | c7642f6 | 2011-01-31 16:27:45 +0000 | [diff] [blame] | 1002 | clk_disable(dss.dss_video_fck); |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 1003 | |
| 1004 | dss.num_clks_enabled -= num_clks; |
| 1005 | } |
| 1006 | |
| 1007 | void dss_clk_disable(enum dss_clock clks) |
| 1008 | { |
| 1009 | if (cpu_is_omap34xx()) { |
| 1010 | unsigned num_clks = count_clk_bits(clks); |
| 1011 | |
| 1012 | BUG_ON(dss.num_clks_enabled < num_clks); |
| 1013 | |
| 1014 | if (dss.num_clks_enabled == num_clks) |
| 1015 | save_all_ctx(); |
| 1016 | } |
| 1017 | |
| 1018 | dss_clk_disable_no_ctx(clks); |
| 1019 | } |
| 1020 | |
| 1021 | static void dss_clk_enable_all_no_ctx(void) |
| 1022 | { |
| 1023 | enum dss_clock clks; |
| 1024 | |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 1025 | clks = DSS_CLK_ICK | DSS_CLK_FCK | DSS_CLK_SYSCK | DSS_CLK_TVFCK; |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 1026 | if (cpu_is_omap34xx()) |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 1027 | clks |= DSS_CLK_VIDFCK; |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 1028 | dss_clk_enable_no_ctx(clks); |
| 1029 | } |
| 1030 | |
| 1031 | static void dss_clk_disable_all_no_ctx(void) |
| 1032 | { |
| 1033 | enum dss_clock clks; |
| 1034 | |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 1035 | clks = DSS_CLK_ICK | DSS_CLK_FCK | DSS_CLK_SYSCK | DSS_CLK_TVFCK; |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 1036 | if (cpu_is_omap34xx()) |
Archit Taneja | 6af9cd1 | 2011-01-31 16:27:44 +0000 | [diff] [blame] | 1037 | clks |= DSS_CLK_VIDFCK; |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 1038 | dss_clk_disable_no_ctx(clks); |
| 1039 | } |
| 1040 | |
| 1041 | #if defined(CONFIG_DEBUG_FS) && defined(CONFIG_OMAP2_DSS_DEBUG_SUPPORT) |
| 1042 | /* CLOCKS */ |
| 1043 | static void core_dump_clocks(struct seq_file *s) |
| 1044 | { |
| 1045 | int i; |
| 1046 | struct clk *clocks[5] = { |
| 1047 | dss.dss_ick, |
Archit Taneja | c7642f6 | 2011-01-31 16:27:45 +0000 | [diff] [blame] | 1048 | dss.dss_fck, |
| 1049 | dss.dss_sys_clk, |
| 1050 | dss.dss_tv_fck, |
| 1051 | dss.dss_video_fck |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 1052 | }; |
| 1053 | |
Tomi Valkeinen | ab46d8b | 2011-04-04 09:36:23 +0300 | [diff] [blame] | 1054 | const char *names[5] = { |
| 1055 | "ick", |
| 1056 | "fck", |
| 1057 | "sys_clk", |
| 1058 | "tv_fck", |
| 1059 | "video_fck" |
| 1060 | }; |
| 1061 | |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 1062 | seq_printf(s, "- CORE -\n"); |
| 1063 | |
| 1064 | seq_printf(s, "internal clk count\t\t%u\n", dss.num_clks_enabled); |
| 1065 | |
| 1066 | for (i = 0; i < 5; i++) { |
| 1067 | if (!clocks[i]) |
| 1068 | continue; |
Tomi Valkeinen | ab46d8b | 2011-04-04 09:36:23 +0300 | [diff] [blame] | 1069 | seq_printf(s, "%s (%s)%*s\t%lu\t%d\n", |
| 1070 | names[i], |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 1071 | clocks[i]->name, |
Tomi Valkeinen | ab46d8b | 2011-04-04 09:36:23 +0300 | [diff] [blame] | 1072 | 24 - strlen(names[i]) - strlen(clocks[i]->name), |
| 1073 | "", |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 1074 | clk_get_rate(clocks[i]), |
| 1075 | clocks[i]->usecount); |
| 1076 | } |
| 1077 | } |
| 1078 | #endif /* defined(CONFIG_DEBUG_FS) && defined(CONFIG_OMAP2_DSS_DEBUG_SUPPORT) */ |
| 1079 | |
| 1080 | /* DEBUGFS */ |
| 1081 | #if defined(CONFIG_DEBUG_FS) && defined(CONFIG_OMAP2_DSS_DEBUG_SUPPORT) |
| 1082 | void dss_debug_dump_clocks(struct seq_file *s) |
| 1083 | { |
| 1084 | core_dump_clocks(s); |
| 1085 | dss_dump_clocks(s); |
| 1086 | dispc_dump_clocks(s); |
| 1087 | #ifdef CONFIG_OMAP2_DSS_DSI |
| 1088 | dsi_dump_clocks(s); |
| 1089 | #endif |
| 1090 | } |
| 1091 | #endif |
| 1092 | |
| 1093 | |
Senthilvadivu Guruswamy | 96c401b | 2011-01-24 06:21:57 +0000 | [diff] [blame] | 1094 | /* DSS HW IP initialisation */ |
| 1095 | static int omap_dsshw_probe(struct platform_device *pdev) |
| 1096 | { |
| 1097 | int r; |
Senthilvadivu Guruswamy | 96c401b | 2011-01-24 06:21:57 +0000 | [diff] [blame] | 1098 | |
| 1099 | dss.pdev = pdev; |
| 1100 | |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 1101 | r = dss_get_clocks(); |
| 1102 | if (r) |
| 1103 | goto err_clocks; |
| 1104 | |
| 1105 | dss_clk_enable_all_no_ctx(); |
| 1106 | |
| 1107 | dss.ctx_id = dss_get_ctx_id(); |
| 1108 | DSSDBG("initial ctx id %u\n", dss.ctx_id); |
| 1109 | |
Tomi Valkeinen | 42c9dee | 2011-03-02 12:29:27 +0200 | [diff] [blame] | 1110 | r = dss_init(); |
Senthilvadivu Guruswamy | 96c401b | 2011-01-24 06:21:57 +0000 | [diff] [blame] | 1111 | if (r) { |
| 1112 | DSSERR("Failed to initialize DSS\n"); |
| 1113 | goto err_dss; |
| 1114 | } |
| 1115 | |
Tomi Valkeinen | 587b5e8 | 2011-03-02 12:47:54 +0200 | [diff] [blame] | 1116 | r = dpi_init(); |
| 1117 | if (r) { |
| 1118 | DSSERR("Failed to initialize DPI\n"); |
| 1119 | goto err_dpi; |
| 1120 | } |
| 1121 | |
| 1122 | r = sdi_init(); |
| 1123 | if (r) { |
| 1124 | DSSERR("Failed to initialize SDI\n"); |
| 1125 | goto err_sdi; |
| 1126 | } |
| 1127 | |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 1128 | dss_clk_disable_all_no_ctx(); |
| 1129 | return 0; |
Tomi Valkeinen | 587b5e8 | 2011-03-02 12:47:54 +0200 | [diff] [blame] | 1130 | err_sdi: |
| 1131 | dpi_exit(); |
| 1132 | err_dpi: |
| 1133 | dss_exit(); |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 1134 | err_dss: |
| 1135 | dss_clk_disable_all_no_ctx(); |
| 1136 | dss_put_clocks(); |
| 1137 | err_clocks: |
Senthilvadivu Guruswamy | 96c401b | 2011-01-24 06:21:57 +0000 | [diff] [blame] | 1138 | return r; |
| 1139 | } |
| 1140 | |
| 1141 | static int omap_dsshw_remove(struct platform_device *pdev) |
| 1142 | { |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 1143 | |
Senthilvadivu Guruswamy | 96c401b | 2011-01-24 06:21:57 +0000 | [diff] [blame] | 1144 | dss_exit(); |
| 1145 | |
Senthilvadivu Guruswamy | 8b9cb3a | 2011-01-24 06:21:58 +0000 | [diff] [blame] | 1146 | /* |
| 1147 | * As part of hwmod changes, DSS is not the only controller of dss |
| 1148 | * clocks; hwmod framework itself will also enable clocks during hwmod |
| 1149 | * init for dss, and autoidle is set in h/w for DSS. Hence, there's no |
| 1150 | * need to disable clocks if their usecounts > 1. |
| 1151 | */ |
| 1152 | WARN_ON(dss.num_clks_enabled > 0); |
| 1153 | |
| 1154 | dss_put_clocks(); |
Senthilvadivu Guruswamy | 96c401b | 2011-01-24 06:21:57 +0000 | [diff] [blame] | 1155 | return 0; |
| 1156 | } |
| 1157 | |
| 1158 | static struct platform_driver omap_dsshw_driver = { |
| 1159 | .probe = omap_dsshw_probe, |
| 1160 | .remove = omap_dsshw_remove, |
| 1161 | .driver = { |
| 1162 | .name = "omapdss_dss", |
| 1163 | .owner = THIS_MODULE, |
| 1164 | }, |
| 1165 | }; |
| 1166 | |
| 1167 | int dss_init_platform_driver(void) |
| 1168 | { |
| 1169 | return platform_driver_register(&omap_dsshw_driver); |
| 1170 | } |
| 1171 | |
| 1172 | void dss_uninit_platform_driver(void) |
| 1173 | { |
| 1174 | return platform_driver_unregister(&omap_dsshw_driver); |
| 1175 | } |