diff options
Diffstat (limited to 'drivers/video/omap2/dss/dss.c')
| -rw-r--r-- | drivers/video/omap2/dss/dss.c | 550 |
1 files changed, 473 insertions, 77 deletions
diff --git a/drivers/video/omap2/dss/dss.c b/drivers/video/omap2/dss/dss.c index 77c3621c917..d76bc2678c5 100644 --- a/drivers/video/omap2/dss/dss.c +++ b/drivers/video/omap2/dss/dss.c @@ -31,9 +31,9 @@ #include <linux/clk.h> #include <plat/display.h> +#include <plat/clock.h> #include "dss.h" - -#define DSS_BASE 0x48050000 +#include "dss_features.h" #define DSS_SZ_REGS SZ_512 @@ -59,9 +59,19 @@ struct dss_reg { dss_write_reg(idx, FLD_MOD(dss_read_reg(idx), val, start, end)) static struct { + struct platform_device *pdev; void __iomem *base; - - struct clk *dpll4_m4_ck; + int ctx_id; + int irq; + + /* Points to DPLL4_M4 in OMAP3xxx, and DPLL_PER_M5 in OMAP44xx */ + struct clk *dpll_per_mx_ck; + struct clk *dss_ick; + struct clk *dss_fck; + struct clk *dss_sys_clk; + struct clk *dss_tv_fck; + struct clk *dss_video_fck; + unsigned num_clks_enabled; unsigned long cache_req_pck; unsigned long cache_prate; @@ -74,6 +84,11 @@ static struct { u32 ctx[DSS_SZ_REGS / sizeof(u32)]; } dss; +static void dss_clk_enable_all_no_ctx(void); +static void dss_clk_disable_all_no_ctx(void); +static void dss_clk_enable_no_ctx(enum dss_clock clks); +static void dss_clk_disable_no_ctx(enum dss_clock clks); + static int _omap_dss_wait_reset(void); static inline void dss_write_reg(const struct dss_reg idx, u32 val) @@ -211,37 +226,37 @@ void dss_sdi_disable(void) void dss_dump_clocks(struct seq_file *s) { - unsigned long dpll4_ck_rate; - unsigned long dpll4_m4_ck_rate; + unsigned long dpll_per_ck_rate; + unsigned long dpll_per_mx_ck_rate; - dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK1); + dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK); - dpll4_ck_rate = clk_get_rate(clk_get_parent(dss.dpll4_m4_ck)); - dpll4_m4_ck_rate = clk_get_rate(dss.dpll4_m4_ck); + dpll_per_ck_rate = clk_get_rate(clk_get_parent(dss.dpll_per_mx_ck)); + dpll_per_mx_ck_rate = clk_get_rate(dss.dpll_per_mx_ck); seq_printf(s, "- DSS -\n"); - seq_printf(s, "dpll4_ck %lu\n", dpll4_ck_rate); + seq_printf(s, "dpll_per_ck %lu\n", dpll_per_ck_rate); if (cpu_is_omap3630()) seq_printf(s, "dss1_alwon_fclk = %lu / %lu = %lu\n", - dpll4_ck_rate, - dpll4_ck_rate / dpll4_m4_ck_rate, - dss_clk_get_rate(DSS_CLK_FCK1)); + dpll_per_ck_rate, + dpll_per_ck_rate / dpll_per_mx_ck_rate, + dss_clk_get_rate(DSS_CLK_FCK)); else seq_printf(s, "dss1_alwon_fclk = %lu / %lu * 2 = %lu\n", - dpll4_ck_rate, - dpll4_ck_rate / dpll4_m4_ck_rate, - dss_clk_get_rate(DSS_CLK_FCK1)); + dpll_per_ck_rate, + dpll_per_ck_rate / dpll_per_mx_ck_rate, + dss_clk_get_rate(DSS_CLK_FCK)); - dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK1); + dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK); } void dss_dump_regs(struct seq_file *s) { #define DUMPREG(r) seq_printf(s, "%-35s %08x\n", #r, dss_read_reg(r)) - dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK1); + dss_clk_enable(DSS_CLK_ICK | DSS_CLK_FCK); DUMPREG(DSS_REVISION); DUMPREG(DSS_SYSCONFIG); @@ -252,7 +267,7 @@ void dss_dump_regs(struct seq_file *s) DUMPREG(DSS_PLL_CONTROL); DUMPREG(DSS_SDI_STATUS); - dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK1); + dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK); #undef DUMPREG } @@ -305,11 +320,12 @@ int dss_calc_clock_rates(struct dss_clock_info *cinfo) { unsigned long prate; - if (cinfo->fck_div > (cpu_is_omap3630() ? 32 : 16) || - cinfo->fck_div == 0) + if (cinfo->fck_div > + (dss_has_feature(FEAT_DPLL_FCK_32_DIV) ? 32 : 16) || + cinfo->fck_div == 0) return -EINVAL; - prate = clk_get_rate(clk_get_parent(dss.dpll4_m4_ck)); + prate = clk_get_rate(clk_get_parent(dss.dpll_per_mx_ck)); cinfo->fck = prate / cinfo->fck_div; @@ -321,11 +337,11 @@ int dss_set_clock_div(struct dss_clock_info *cinfo) unsigned long prate; int r; - if (cpu_is_omap34xx()) { - prate = clk_get_rate(clk_get_parent(dss.dpll4_m4_ck)); - DSSDBG("dpll4_m4 = %ld\n", prate); + if (dss_has_feature(FEAT_VAR_DPLL_FCK)) { + prate = clk_get_rate(clk_get_parent(dss.dpll_per_mx_ck)); + DSSDBG("dpll_per_mx parent rate = %ld\n", prate); - r = clk_set_rate(dss.dpll4_m4_ck, prate / cinfo->fck_div); + r = clk_set_rate(dss.dpll_per_mx_ck, prate / cinfo->fck_div); if (r) return r; } @@ -337,12 +353,12 @@ int dss_set_clock_div(struct dss_clock_info *cinfo) int dss_get_clock_div(struct dss_clock_info *cinfo) { - cinfo->fck = dss_clk_get_rate(DSS_CLK_FCK1); + cinfo->fck = dss_clk_get_rate(DSS_CLK_FCK); - if (cpu_is_omap34xx()) { + if (dss_has_feature(FEAT_VAR_DPLL_FCK)) { unsigned long prate; - prate = clk_get_rate(clk_get_parent(dss.dpll4_m4_ck)); - if (cpu_is_omap3630()) + prate = clk_get_rate(clk_get_parent(dss.dpll_per_mx_ck)); + if (dss_has_feature(FEAT_DPLL_FCK_32_DIV)) cinfo->fck_div = prate / (cinfo->fck); else cinfo->fck_div = prate / (cinfo->fck / 2); @@ -353,10 +369,10 @@ int dss_get_clock_div(struct dss_clock_info *cinfo) return 0; } -unsigned long dss_get_dpll4_rate(void) +unsigned long dss_get_dpll_per_rate(void) { - if (cpu_is_omap34xx()) - return clk_get_rate(clk_get_parent(dss.dpll4_m4_ck)); + if (dss_has_feature(FEAT_VAR_DPLL_FCK)) + return clk_get_rate(clk_get_parent(dss.dpll_per_mx_ck)); else return 0; } @@ -376,12 +392,13 @@ int dss_calc_clock_div(bool is_tft, unsigned long req_pck, int match = 0; int min_fck_per_pck; - prate = dss_get_dpll4_rate(); + prate = dss_get_dpll_per_rate(); - fck = dss_clk_get_rate(DSS_CLK_FCK1); + fck = dss_clk_get_rate(DSS_CLK_FCK); if (req_pck == dss.cache_req_pck && - ((cpu_is_omap34xx() && prate == dss.cache_prate) || - dss.cache_dss_cinfo.fck == fck)) { + ((dss_has_feature(FEAT_VAR_DPLL_FCK) && + prate == dss.cache_prate) || + dss.cache_dss_cinfo.fck == fck)) { DSSDBG("dispc clock info found from cache.\n"); *dss_cinfo = dss.cache_dss_cinfo; *dispc_cinfo = dss.cache_dispc_cinfo; @@ -402,10 +419,10 @@ retry: memset(&best_dss, 0, sizeof(best_dss)); memset(&best_dispc, 0, sizeof(best_dispc)); - if (cpu_is_omap24xx()) { + if (!dss_has_feature(FEAT_VAR_DPLL_FCK)) { struct dispc_clock_info cur_dispc; /* XXX can we change the clock on omap2? */ - fck = dss_clk_get_rate(DSS_CLK_FCK1); + fck = dss_clk_get_rate(DSS_CLK_FCK); fck_div = 1; dispc_find_clk_divs(is_tft, req_pck, fck, &cur_dispc); @@ -417,12 +434,13 @@ retry: best_dispc = cur_dispc; goto found; - } else if (cpu_is_omap34xx()) { - for (fck_div = (cpu_is_omap3630() ? 32 : 16); - fck_div > 0; --fck_div) { + } else { + for (fck_div = + (dss_has_feature(FEAT_DPLL_FCK_32_DIV) ? 32 : 16); + fck_div > 0; --fck_div) { struct dispc_clock_info cur_dispc; - if (cpu_is_omap3630()) + if (dss_has_feature(FEAT_DPLL_FCK_32_DIV)) fck = prate / fck_div; else fck = prate / fck_div * 2; @@ -450,8 +468,6 @@ retry: goto found; } } - } else { - BUG(); } found: @@ -482,28 +498,22 @@ found: return 0; } - - -static irqreturn_t dss_irq_handler_omap2(int irq, void *arg) -{ - dispc_irq_handler(); - - return IRQ_HANDLED; -} - -static irqreturn_t dss_irq_handler_omap3(int irq, void *arg) +static irqreturn_t dss_irq_handler(int irq, void *arg) { - u32 irqstatus; + if (dss_has_feature(FEAT_COMMON_IRQ_DISPC_DSI)) { + u32 irqstatus; - irqstatus = dss_read_reg(DSS_IRQSTATUS); + irqstatus = dss_read_reg(DSS_IRQSTATUS); - if (irqstatus & (1<<0)) /* DISPC_IRQ */ - dispc_irq_handler(); + if (irqstatus & (1<<0)) /* DISPC_IRQ */ + dispc_irq_handler(); #ifdef CONFIG_OMAP2_DSS_DSI - if (irqstatus & (1<<1)) /* DSI_IRQ */ - dsi_irq_handler(); + if (irqstatus & (1<<1)) /* DSI_IRQ */ + dsi_irq_handler(); #endif - + } else { + dispc_irq_handler(); + } return IRQ_HANDLED; } @@ -549,12 +559,19 @@ void dss_set_dac_pwrdn_bgz(bool enable) REG_FLD_MOD(DSS_CONTROL, enable, 5, 5); /* DAC Power-Down Control */ } -int dss_init(bool skip_init) +static int dss_init(bool skip_init) { int r; u32 rev; + struct resource *dss_mem; - dss.base = ioremap(DSS_BASE, DSS_SZ_REGS); + dss_mem = platform_get_resource(dss.pdev, IORESOURCE_MEM, 0); + if (!dss_mem) { + DSSERR("can't get IORESOURCE_MEM DSS\n"); + r = -EINVAL; + goto fail0; + } + dss.base = ioremap(dss_mem->start, resource_size(dss_mem)); if (!dss.base) { DSSERR("can't ioremap DSS\n"); r = -ENOMEM; @@ -590,11 +607,14 @@ int dss_init(bool skip_init) REG_FLD_MOD(DSS_CONTROL, 0, 2, 2); /* venc clock mode = normal */ #endif - r = request_irq(INT_24XX_DSS_IRQ, - cpu_is_omap24xx() - ? dss_irq_handler_omap2 - : dss_irq_handler_omap3, - 0, "OMAP DSS", NULL); + dss.irq = platform_get_irq(dss.pdev, 0); + if (dss.irq < 0) { + DSSERR("omap2 dss: platform_get_irq failed\n"); + r = -ENODEV; + goto fail1; + } + + r = request_irq(dss.irq, dss_irq_handler, 0, "OMAP DSS", NULL); if (r < 0) { DSSERR("omap2 dss: request_irq failed\n"); @@ -602,10 +622,17 @@ int dss_init(bool skip_init) } if (cpu_is_omap34xx()) { - dss.dpll4_m4_ck = clk_get(NULL, "dpll4_m4_ck"); - if (IS_ERR(dss.dpll4_m4_ck)) { + dss.dpll_per_mx_ck = clk_get(NULL, "dpll4_m4_ck"); + if (IS_ERR(dss.dpll_per_mx_ck)) { DSSERR("Failed to get dpll4_m4_ck\n"); - r = PTR_ERR(dss.dpll4_m4_ck); + r = PTR_ERR(dss.dpll_per_mx_ck); + goto fail2; + } + } else if (cpu_is_omap44xx()) { + dss.dpll_per_mx_ck = clk_get(NULL, "dpll_per_m5x2_ck"); + if (IS_ERR(dss.dpll_per_mx_ck)) { + DSSERR("Failed to get dpll_per_mx_ck\n"); + r = PTR_ERR(dss.dpll_per_mx_ck); goto fail2; } } @@ -622,20 +649,389 @@ int dss_init(bool skip_init) return 0; fail2: - free_irq(INT_24XX_DSS_IRQ, NULL); + free_irq(dss.irq, NULL); fail1: iounmap(dss.base); fail0: return r; } -void dss_exit(void) +static void dss_exit(void) { - if (cpu_is_omap34xx()) - clk_put(dss.dpll4_m4_ck); + if (dss_has_feature(FEAT_VAR_DPLL_FCK)) + clk_put(dss.dpll_per_mx_ck); - free_irq(INT_24XX_DSS_IRQ, NULL); + free_irq(dss.irq, NULL); iounmap(dss.base); } +/* CONTEXT */ +static int dss_get_ctx_id(void) +{ + struct omap_display_platform_data *pdata = dss.pdev->dev.platform_data; + int r; + + if (!pdata->board_data->get_last_off_on_transaction_id) + return 0; + r = pdata->board_data->get_last_off_on_transaction_id(&dss.pdev->dev); + if (r < 0) { + dev_err(&dss.pdev->dev, "getting transaction ID failed, " + "will force context restore\n"); + r = -1; + } + return r; +} + +int dss_need_ctx_restore(void) +{ + int id = dss_get_ctx_id(); + + if (id < 0 || id != dss.ctx_id) { + DSSDBG("ctx id %d -> id %d\n", + dss.ctx_id, id); + dss.ctx_id = id; + return 1; + } else { + return 0; + } +} + +static void save_all_ctx(void) +{ + DSSDBG("save context\n"); + + dss_clk_enable_no_ctx(DSS_CLK_ICK | DSS_CLK_FCK); + + dss_save_context(); + dispc_save_context(); +#ifdef CONFIG_OMAP2_DSS_DSI + dsi_save_context(); +#endif + + dss_clk_disable_no_ctx(DSS_CLK_ICK | DSS_CLK_FCK); +} + +static void restore_all_ctx(void) +{ + DSSDBG("restore context\n"); + + dss_clk_enable_all_no_ctx(); + + dss_restore_context(); + dispc_restore_context(); +#ifdef CONFIG_OMAP2_DSS_DSI + dsi_restore_context(); +#endif + + dss_clk_disable_all_no_ctx(); +} + +static int dss_get_clock(struct clk **clock, const char *clk_name) +{ + struct clk *clk; + + clk = clk_get(&dss.pdev->dev, clk_name); + + if (IS_ERR(clk)) { + DSSERR("can't get clock %s", clk_name); + return PTR_ERR(clk); + } + + *clock = clk; + + DSSDBG("clk %s, rate %ld\n", clk_name, clk_get_rate(clk)); + + return 0; +} + +static int dss_get_clocks(void) +{ + int r; + + dss.dss_ick = NULL; + dss.dss_fck = NULL; + dss.dss_sys_clk = NULL; + dss.dss_tv_fck = NULL; + dss.dss_video_fck = NULL; + + r = dss_get_clock(&dss.dss_ick, "ick"); + if (r) + goto err; + + r = dss_get_clock(&dss.dss_fck, "fck"); + if (r) + goto err; + + r = dss_get_clock(&dss.dss_sys_clk, "sys_clk"); + if (r) + goto err; + + r = dss_get_clock(&dss.dss_tv_fck, "tv_clk"); + if (r) + goto err; + + r = dss_get_clock(&dss.dss_video_fck, "video_clk"); + if (r) + goto err; + + return 0; + +err: + if (dss.dss_ick) + clk_put(dss.dss_ick); + if (dss.dss_fck) + clk_put(dss.dss_fck); + if (dss.dss_sys_clk) + clk_put(dss.dss_sys_clk); + if (dss.dss_tv_fck) + clk_put(dss.dss_tv_fck); + if (dss.dss_video_fck) + clk_put(dss.dss_video_fck); + + return r; +} + +static void dss_put_clocks(void) +{ + if (dss.dss_video_fck) + clk_put(dss.dss_video_fck); + clk_put(dss.dss_tv_fck); + clk_put(dss.dss_fck); + clk_put(dss.dss_sys_clk); + clk_put(dss.dss_ick); +} + +unsigned long dss_clk_get_rate(enum dss_clock clk) +{ + switch (clk) { + case DSS_CLK_ICK: + return clk_get_rate(dss.dss_ick); + case DSS_CLK_FCK: + return clk_get_rate(dss.dss_fck); + case DSS_CLK_SYSCK: + return clk_get_rate(dss.dss_sys_clk); + case DSS_CLK_TVFCK: + return clk_get_rate(dss.dss_tv_fck); + case DSS_CLK_VIDFCK: + return clk_get_rate(dss.dss_video_fck); + } + + BUG(); + return 0; +} + +static unsigned count_clk_bits(enum dss_clock clks) +{ + unsigned num_clks = 0; + + if (clks & DSS_CLK_ICK) + ++num_clks; + if (clks & DSS_CLK_FCK) + ++num_clks; + if (clks & DSS_CLK_SYSCK) + ++num_clks; + if (clks & DSS_CLK_TVFCK) + ++num_clks; + if (clks & DSS_CLK_VIDFCK) + ++num_clks; + + return num_clks; +} + +static void dss_clk_enable_no_ctx(enum dss_clock clks) +{ + unsigned num_clks = count_clk_bits(clks); + + if (clks & DSS_CLK_ICK) + clk_enable(dss.dss_ick); + if (clks & DSS_CLK_FCK) + clk_enable(dss.dss_fck); + if (clks & DSS_CLK_SYSCK) + clk_enable(dss.dss_sys_clk); + if (clks & DSS_CLK_TVFCK) + clk_enable(dss.dss_tv_fck); + if (clks & DSS_CLK_VIDFCK) + clk_enable(dss.dss_video_fck); + + dss.num_clks_enabled += num_clks; +} + +void dss_clk_enable(enum dss_clock clks) +{ + bool check_ctx = dss.num_clks_enabled == 0; + + dss_clk_enable_no_ctx(clks); + + if (check_ctx && cpu_is_omap34xx() && dss_need_ctx_restore()) + restore_all_ctx(); +} + +static void dss_clk_disable_no_ctx(enum dss_clock clks) +{ + unsigned num_clks = count_clk_bits(clks); + + if (clks & DSS_CLK_ICK) + clk_disable(dss.dss_ick); + if (clks & DSS_CLK_FCK) + clk_disable(dss.dss_fck); + if (clks & DSS_CLK_SYSCK) + clk_disable(dss.dss_sys_clk); + if (clks & DSS_CLK_TVFCK) + clk_disable(dss.dss_tv_fck); + if (clks & DSS_CLK_VIDFCK) + clk_disable(dss.dss_video_fck); + + dss.num_clks_enabled -= num_clks; +} + +void dss_clk_disable(enum dss_clock clks) +{ + if (cpu_is_omap34xx()) { + unsigned num_clks = count_clk_bits(clks); + + BUG_ON(dss.num_clks_enabled < num_clks); + + if (dss.num_clks_enabled == num_clks) + save_all_ctx(); + } + + dss_clk_disable_no_ctx(clks); +} + +static void dss_clk_enable_all_no_ctx(void) +{ + enum dss_clock clks; + + clks = DSS_CLK_ICK | DSS_CLK_FCK | DSS_CLK_SYSCK | DSS_CLK_TVFCK; + if (cpu_is_omap34xx()) + clks |= DSS_CLK_VIDFCK; + dss_clk_enable_no_ctx(clks); +} + +static void dss_clk_disable_all_no_ctx(void) +{ + enum dss_clock clks; + + clks = DSS_CLK_ICK | DSS_CLK_FCK | DSS_CLK_SYSCK | DSS_CLK_TVFCK; + if (cpu_is_omap34xx()) + clks |= DSS_CLK_VIDFCK; + dss_clk_disable_no_ctx(clks); +} + +#if defined(CONFIG_DEBUG_FS) && defined(CONFIG_OMAP2_DSS_DEBUG_SUPPORT) +/* CLOCKS */ +static void core_dump_clocks(struct seq_file *s) +{ + int i; + struct clk *clocks[5] = { + dss.dss_ick, + dss.dss_fck, + dss.dss_sys_clk, + dss.dss_tv_fck, + dss.dss_video_fck + }; + + seq_printf(s, "- CORE -\n"); + + seq_printf(s, "internal clk count\t\t%u\n", dss.num_clks_enabled); + + for (i = 0; i < 5; i++) { + if (!clocks[i]) + continue; + seq_printf(s, "%-15s\t%lu\t%d\n", + clocks[i]->name, + clk_get_rate(clocks[i]), + clocks[i]->usecount); + } +} +#endif /* defined(CONFIG_DEBUG_FS) && defined(CONFIG_OMAP2_DSS_DEBUG_SUPPORT) */ + +/* DEBUGFS */ +#if defined(CONFIG_DEBUG_FS) && defined(CONFIG_OMAP2_DSS_DEBUG_SUPPORT) +void dss_debug_dump_clocks(struct seq_file *s) +{ + core_dump_clocks(s); + dss_dump_clocks(s); + dispc_dump_clocks(s); +#ifdef CONFIG_OMAP2_DSS_DSI + dsi_dump_clocks(s); +#endif +} +#endif + + +/* DSS HW IP initialisation */ +static int omap_dsshw_probe(struct platform_device *pdev) +{ + int r; + int skip_init = 0; + + dss.pdev = pdev; + + r = dss_get_clocks(); + if (r) + goto err_clocks; + + dss_clk_enable_all_no_ctx(); + + dss.ctx_id = dss_get_ctx_id(); + DSSDBG("initial ctx id %u\n", dss.ctx_id); + +#ifdef CONFIG_FB_OMAP_BOOTLOADER_INIT + /* DISPC_CONTROL */ + if (omap_readl(0x48050440) & 1) /* LCD enabled? */ + skip_init = 1; +#endif + + r = dss_init(skip_init); + if (r) { + DSSERR("Failed to initialize DSS\n"); + goto err_dss; + } + + dss_clk_disable_all_no_ctx(); + return 0; + +err_dss: + dss_clk_disable_all_no_ctx(); + dss_put_clocks(); +err_clocks: + return r; +} + +static int omap_dsshw_remove(struct platform_device *pdev) +{ + + dss_exit(); + + /* + * As part of hwmod changes, DSS is not the only controller of dss + * clocks; hwmod framework itself will also enable clocks during hwmod + * init for dss, and autoidle is set in h/w for DSS. Hence, there's no + * need to disable clocks if their usecounts > 1. + */ + WARN_ON(dss.num_clks_enabled > 0); + + dss_put_clocks(); + return 0; +} + +static struct platform_driver omap_dsshw_driver = { + .probe = omap_dsshw_probe, + .remove = omap_dsshw_remove, + .driver = { + .name = "omap_dss", + .owner = THIS_MODULE, + }, +}; + +int dss_init_platform_driver(void) +{ + return platform_driver_register(&omap_dsshw_driver); +} + +void dss_uninit_platform_driver(void) +{ + return platform_driver_unregister(&omap_dsshw_driver); +} |