diff options
Diffstat (limited to 'drivers/video/fbdev/omap2/dss/dss.c')
| -rw-r--r-- | drivers/video/fbdev/omap2/dss/dss.c | 972 |
1 files changed, 972 insertions, 0 deletions
diff --git a/drivers/video/fbdev/omap2/dss/dss.c b/drivers/video/fbdev/omap2/dss/dss.c new file mode 100644 index 0000000..d55266c --- /dev/null +++ b/drivers/video/fbdev/omap2/dss/dss.c @@ -0,0 +1,972 @@ +/* + * linux/drivers/video/omap2/dss/dss.c + * + * Copyright (C) 2009 Nokia Corporation + * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com> + * + * Some code and ideas taken from drivers/video/omap/ driver + * by Imre Deak. + * + * 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/>. + */ + +#define DSS_SUBSYS_NAME "DSS" + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/io.h> +#include <linux/export.h> +#include <linux/err.h> +#include <linux/delay.h> +#include <linux/seq_file.h> +#include <linux/clk.h> +#include <linux/platform_device.h> +#include <linux/pm_runtime.h> +#include <linux/gfp.h> +#include <linux/sizes.h> +#include <linux/of.h> + +#include <video/omapdss.h> + +#include "dss.h" +#include "dss_features.h" + +#define DSS_SZ_REGS SZ_512 + +struct dss_reg { + u16 idx; +}; + +#define DSS_REG(idx) ((const struct dss_reg) { idx }) + +#define DSS_REVISION DSS_REG(0x0000) +#define DSS_SYSCONFIG DSS_REG(0x0010) +#define DSS_SYSSTATUS DSS_REG(0x0014) +#define DSS_CONTROL DSS_REG(0x0040) +#define DSS_SDI_CONTROL DSS_REG(0x0044) +#define DSS_PLL_CONTROL DSS_REG(0x0048) +#define DSS_SDI_STATUS DSS_REG(0x005C) + +#define REG_GET(idx, start, end) \ + FLD_GET(dss_read_reg(idx), start, end) + +#define REG_FLD_MOD(idx, val, start, end) \ + dss_write_reg(idx, FLD_MOD(dss_read_reg(idx), val, start, end)) + +static int dss_runtime_get(void); +static void dss_runtime_put(void); + +struct dss_features { + u8 fck_div_max; + u8 dss_fck_multiplier; + const char *parent_clk_name; + int (*dpi_select_source)(enum omap_channel channel); +}; + +static struct { + struct platform_device *pdev; + void __iomem *base; + + struct clk *parent_clk; + struct clk *dss_clk; + unsigned long dss_clk_rate; + + unsigned long cache_req_pck; + unsigned long cache_prate; + struct dispc_clock_info cache_dispc_cinfo; + + enum omap_dss_clk_source dsi_clk_source[MAX_NUM_DSI]; + enum omap_dss_clk_source dispc_clk_source; + enum omap_dss_clk_source lcd_clk_source[MAX_DSS_LCD_MANAGERS]; + + bool ctx_valid; + u32 ctx[DSS_SZ_REGS / sizeof(u32)]; + + const struct dss_features *feat; +} dss; + +static const char * const dss_generic_clk_source_names[] = { + [OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC] = "DSI_PLL_HSDIV_DISPC", + [OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DSI] = "DSI_PLL_HSDIV_DSI", + [OMAP_DSS_CLK_SRC_FCK] = "DSS_FCK", + [OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DISPC] = "DSI_PLL2_HSDIV_DISPC", + [OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DSI] = "DSI_PLL2_HSDIV_DSI", +}; + +static inline void dss_write_reg(const struct dss_reg idx, u32 val) +{ + __raw_writel(val, dss.base + idx.idx); +} + +static inline u32 dss_read_reg(const struct dss_reg idx) +{ + return __raw_readl(dss.base + idx.idx); +} + +#define SR(reg) \ + dss.ctx[(DSS_##reg).idx / sizeof(u32)] = dss_read_reg(DSS_##reg) +#define RR(reg) \ + dss_write_reg(DSS_##reg, dss.ctx[(DSS_##reg).idx / sizeof(u32)]) + +static void dss_save_context(void) +{ + DSSDBG("dss_save_context\n"); + + SR(CONTROL); + + if (dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_LCD) & + OMAP_DISPLAY_TYPE_SDI) { + SR(SDI_CONTROL); + SR(PLL_CONTROL); + } + + dss.ctx_valid = true; + + DSSDBG("context saved\n"); +} + +static void dss_restore_context(void) +{ + DSSDBG("dss_restore_context\n"); + + if (!dss.ctx_valid) + return; + + RR(CONTROL); + + if (dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_LCD) & + OMAP_DISPLAY_TYPE_SDI) { + RR(SDI_CONTROL); + RR(PLL_CONTROL); + } + + DSSDBG("context restored\n"); +} + +#undef SR +#undef RR + +void dss_sdi_init(int datapairs) +{ + u32 l; + + BUG_ON(datapairs > 3 || datapairs < 1); + + l = dss_read_reg(DSS_SDI_CONTROL); + l = FLD_MOD(l, 0xf, 19, 15); /* SDI_PDIV */ + l = FLD_MOD(l, datapairs-1, 3, 2); /* SDI_PRSEL */ + l = FLD_MOD(l, 2, 1, 0); /* SDI_BWSEL */ + dss_write_reg(DSS_SDI_CONTROL, l); + + l = dss_read_reg(DSS_PLL_CONTROL); + l = FLD_MOD(l, 0x7, 25, 22); /* SDI_PLL_FREQSEL */ + l = FLD_MOD(l, 0xb, 16, 11); /* SDI_PLL_REGN */ + l = FLD_MOD(l, 0xb4, 10, 1); /* SDI_PLL_REGM */ + dss_write_reg(DSS_PLL_CONTROL, l); +} + +int dss_sdi_enable(void) +{ + unsigned long timeout; + + dispc_pck_free_enable(1); + + /* Reset SDI PLL */ + REG_FLD_MOD(DSS_PLL_CONTROL, 1, 18, 18); /* SDI_PLL_SYSRESET */ + udelay(1); /* wait 2x PCLK */ + + /* Lock SDI PLL */ + REG_FLD_MOD(DSS_PLL_CONTROL, 1, 28, 28); /* SDI_PLL_GOBIT */ + + /* Waiting for PLL lock request to complete */ + timeout = jiffies + msecs_to_jiffies(500); + while (dss_read_reg(DSS_SDI_STATUS) & (1 << 6)) { + if (time_after_eq(jiffies, timeout)) { + DSSERR("PLL lock request timed out\n"); + goto err1; + } + } + + /* Clearing PLL_GO bit */ + REG_FLD_MOD(DSS_PLL_CONTROL, 0, 28, 28); + + /* Waiting for PLL to lock */ + timeout = jiffies + msecs_to_jiffies(500); + while (!(dss_read_reg(DSS_SDI_STATUS) & (1 << 5))) { + if (time_after_eq(jiffies, timeout)) { + DSSERR("PLL lock timed out\n"); + goto err1; + } + } + + dispc_lcd_enable_signal(1); + + /* Waiting for SDI reset to complete */ + timeout = jiffies + msecs_to_jiffies(500); + while (!(dss_read_reg(DSS_SDI_STATUS) & (1 << 2))) { + if (time_after_eq(jiffies, timeout)) { + DSSERR("SDI reset timed out\n"); + goto err2; + } + } + + return 0; + + err2: + dispc_lcd_enable_signal(0); + err1: + /* Reset SDI PLL */ + REG_FLD_MOD(DSS_PLL_CONTROL, 0, 18, 18); /* SDI_PLL_SYSRESET */ + + dispc_pck_free_enable(0); + + return -ETIMEDOUT; +} + +void dss_sdi_disable(void) +{ + dispc_lcd_enable_signal(0); + + dispc_pck_free_enable(0); + + /* Reset SDI PLL */ + REG_FLD_MOD(DSS_PLL_CONTROL, 0, 18, 18); /* SDI_PLL_SYSRESET */ +} + +const char *dss_get_generic_clk_source_name(enum omap_dss_clk_source clk_src) +{ + return dss_generic_clk_source_names[clk_src]; +} + +void dss_dump_clocks(struct seq_file *s) +{ + const char *fclk_name, *fclk_real_name; + unsigned long fclk_rate; + + if (dss_runtime_get()) + return; + + seq_printf(s, "- DSS -\n"); + + fclk_name = dss_get_generic_clk_source_name(OMAP_DSS_CLK_SRC_FCK); + fclk_real_name = dss_feat_get_clk_source_name(OMAP_DSS_CLK_SRC_FCK); + fclk_rate = clk_get_rate(dss.dss_clk); + + seq_printf(s, "%s (%s) = %lu\n", + fclk_name, fclk_real_name, + fclk_rate); + + dss_runtime_put(); +} + +static void dss_dump_regs(struct seq_file *s) +{ +#define DUMPREG(r) seq_printf(s, "%-35s %08x\n", #r, dss_read_reg(r)) + + if (dss_runtime_get()) + return; + + DUMPREG(DSS_REVISION); + DUMPREG(DSS_SYSCONFIG); + DUMPREG(DSS_SYSSTATUS); + DUMPREG(DSS_CONTROL); + + if (dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_LCD) & + OMAP_DISPLAY_TYPE_SDI) { + DUMPREG(DSS_SDI_CONTROL); + DUMPREG(DSS_PLL_CONTROL); + DUMPREG(DSS_SDI_STATUS); + } + + dss_runtime_put(); +#undef DUMPREG +} + +static void dss_select_dispc_clk_source(enum omap_dss_clk_source clk_src) +{ + struct platform_device *dsidev; + int b; + u8 start, end; + + switch (clk_src) { + case OMAP_DSS_CLK_SRC_FCK: + b = 0; + break; + case OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC: + b = 1; + dsidev = dsi_get_dsidev_from_id(0); + dsi_wait_pll_hsdiv_dispc_active(dsidev); + break; + case OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DISPC: + b = 2; + dsidev = dsi_get_dsidev_from_id(1); + dsi_wait_pll_hsdiv_dispc_active(dsidev); + break; + default: + BUG(); + return; + } + + dss_feat_get_reg_field(FEAT_REG_DISPC_CLK_SWITCH, &start, &end); + + REG_FLD_MOD(DSS_CONTROL, b, start, end); /* DISPC_CLK_SWITCH */ + + dss.dispc_clk_source = clk_src; +} + +void dss_select_dsi_clk_source(int dsi_module, + enum omap_dss_clk_source clk_src) +{ + struct platform_device *dsidev; + int b, pos; + + switch (clk_src) { + case OMAP_DSS_CLK_SRC_FCK: + b = 0; + break; + case OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DSI: + BUG_ON(dsi_module != 0); + b = 1; + dsidev = dsi_get_dsidev_from_id(0); + dsi_wait_pll_hsdiv_dsi_active(dsidev); + break; + case OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DSI: + BUG_ON(dsi_module != 1); + b = 1; + dsidev = dsi_get_dsidev_from_id(1); + dsi_wait_pll_hsdiv_dsi_active(dsidev); + break; + default: + BUG(); + return; + } + + pos = dsi_module == 0 ? 1 : 10; + REG_FLD_MOD(DSS_CONTROL, b, pos, pos); /* DSIx_CLK_SWITCH */ + + dss.dsi_clk_source[dsi_module] = clk_src; +} + +void dss_select_lcd_clk_source(enum omap_channel channel, + enum omap_dss_clk_source clk_src) +{ + struct platform_device *dsidev; + int b, ix, pos; + + if (!dss_has_feature(FEAT_LCD_CLK_SRC)) { + dss_select_dispc_clk_source(clk_src); + return; + } + + switch (clk_src) { + case OMAP_DSS_CLK_SRC_FCK: + b = 0; + break; + case OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC: + BUG_ON(channel != OMAP_DSS_CHANNEL_LCD); + b = 1; + dsidev = dsi_get_dsidev_from_id(0); + dsi_wait_pll_hsdiv_dispc_active(dsidev); + break; + case OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DISPC: + BUG_ON(channel != OMAP_DSS_CHANNEL_LCD2 && + channel != OMAP_DSS_CHANNEL_LCD3); + b = 1; + dsidev = dsi_get_dsidev_from_id(1); + dsi_wait_pll_hsdiv_dispc_active(dsidev); + break; + default: + BUG(); + return; + } + + pos = channel == OMAP_DSS_CHANNEL_LCD ? 0 : + (channel == OMAP_DSS_CHANNEL_LCD2 ? 12 : 19); + REG_FLD_MOD(DSS_CONTROL, b, pos, pos); /* LCDx_CLK_SWITCH */ + + ix = channel == OMAP_DSS_CHANNEL_LCD ? 0 : + (channel == OMAP_DSS_CHANNEL_LCD2 ? 1 : 2); + dss.lcd_clk_source[ix] = clk_src; +} + +enum omap_dss_clk_source dss_get_dispc_clk_source(void) +{ + return dss.dispc_clk_source; +} + +enum omap_dss_clk_source dss_get_dsi_clk_source(int dsi_module) +{ + return dss.dsi_clk_source[dsi_module]; +} + +enum omap_dss_clk_source dss_get_lcd_clk_source(enum omap_channel channel) +{ + if (dss_has_feature(FEAT_LCD_CLK_SRC)) { + int ix = channel == OMAP_DSS_CHANNEL_LCD ? 0 : + (channel == OMAP_DSS_CHANNEL_LCD2 ? 1 : 2); + return dss.lcd_clk_source[ix]; + } else { + /* LCD_CLK source is the same as DISPC_FCLK source for + * OMAP2 and OMAP3 */ + return dss.dispc_clk_source; + } +} + +bool dss_div_calc(unsigned long pck, unsigned long fck_min, + dss_div_calc_func func, void *data) +{ + int fckd, fckd_start, fckd_stop; + unsigned long fck; + unsigned long fck_hw_max; + unsigned long fckd_hw_max; + unsigned long prate; + unsigned m; + + fck_hw_max = dss_feat_get_param_max(FEAT_PARAM_DSS_FCK); + + if (dss.parent_clk == NULL) { + unsigned pckd; + + pckd = fck_hw_max / pck; + + fck = pck * pckd; + + fck = clk_round_rate(dss.dss_clk, fck); + + return func(fck, data); + } + + fckd_hw_max = dss.feat->fck_div_max; + + m = dss.feat->dss_fck_multiplier; + prate = clk_get_rate(dss.parent_clk); + + fck_min = fck_min ? fck_min : 1; + + fckd_start = min(prate * m / fck_min, fckd_hw_max); + fckd_stop = max(DIV_ROUND_UP(prate * m, fck_hw_max), 1ul); + + for (fckd = fckd_start; fckd >= fckd_stop; --fckd) { + fck = DIV_ROUND_UP(prate, fckd) * m; + + if (func(fck, data)) + return true; + } + + return false; +} + +int dss_set_fck_rate(unsigned long rate) +{ + int r; + + DSSDBG("set fck to %lu\n", rate); + + r = clk_set_rate(dss.dss_clk, rate); + if (r) + return r; + + dss.dss_clk_rate = clk_get_rate(dss.dss_clk); + + WARN_ONCE(dss.dss_clk_rate != rate, + "clk rate mismatch: %lu != %lu", dss.dss_clk_rate, + rate); + + return 0; +} + +unsigned long dss_get_dispc_clk_rate(void) +{ + return dss.dss_clk_rate; +} + +static int dss_setup_default_clock(void) +{ + unsigned long max_dss_fck, prate; + unsigned long fck; + unsigned fck_div; + int r; + + max_dss_fck = dss_feat_get_param_max(FEAT_PARAM_DSS_FCK); + + if (dss.parent_clk == NULL) { + fck = clk_round_rate(dss.dss_clk, max_dss_fck); + } else { + prate = clk_get_rate(dss.parent_clk); + + fck_div = DIV_ROUND_UP(prate * dss.feat->dss_fck_multiplier, + max_dss_fck); + fck = DIV_ROUND_UP(prate, fck_div) * dss.feat->dss_fck_multiplier; + } + + r = dss_set_fck_rate(fck); + if (r) + return r; + + return 0; +} + +void dss_set_venc_output(enum omap_dss_venc_type type) +{ + int l = 0; + + if (type == OMAP_DSS_VENC_TYPE_COMPOSITE) + l = 0; + else if (type == OMAP_DSS_VENC_TYPE_SVIDEO) + l = 1; + else + BUG(); + + /* venc out selection. 0 = comp, 1 = svideo */ + REG_FLD_MOD(DSS_CONTROL, l, 6, 6); +} + +void dss_set_dac_pwrdn_bgz(bool enable) +{ + REG_FLD_MOD(DSS_CONTROL, enable, 5, 5); /* DAC Power-Down Control */ +} + +void dss_select_hdmi_venc_clk_source(enum dss_hdmi_venc_clk_source_select src) +{ + enum omap_display_type dp; + dp = dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_DIGIT); + + /* Complain about invalid selections */ + WARN_ON((src == DSS_VENC_TV_CLK) && !(dp & OMAP_DISPLAY_TYPE_VENC)); + WARN_ON((src == DSS_HDMI_M_PCLK) && !(dp & OMAP_DISPLAY_TYPE_HDMI)); + + /* Select only if we have options */ + if ((dp & OMAP_DISPLAY_TYPE_VENC) && (dp & OMAP_DISPLAY_TYPE_HDMI)) + REG_FLD_MOD(DSS_CONTROL, src, 15, 15); /* VENC_HDMI_SWITCH */ +} + +enum dss_hdmi_venc_clk_source_select dss_get_hdmi_venc_clk_source(void) +{ + enum omap_display_type displays; + + displays = dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_DIGIT); + if ((displays & OMAP_DISPLAY_TYPE_HDMI) == 0) + return DSS_VENC_TV_CLK; + + if ((displays & OMAP_DISPLAY_TYPE_VENC) == 0) + return DSS_HDMI_M_PCLK; + + return REG_GET(DSS_CONTROL, 15, 15); +} + +static int dss_dpi_select_source_omap2_omap3(enum omap_channel channel) +{ + if (channel != OMAP_DSS_CHANNEL_LCD) + return -EINVAL; + + return 0; +} + +static int dss_dpi_select_source_omap4(enum omap_channel channel) +{ + int val; + + switch (channel) { + case OMAP_DSS_CHANNEL_LCD2: + val = 0; + break; + case OMAP_DSS_CHANNEL_DIGIT: + val = 1; + break; + default: + return -EINVAL; + } + + REG_FLD_MOD(DSS_CONTROL, val, 17, 17); + + return 0; +} + +static int dss_dpi_select_source_omap5(enum omap_channel channel) +{ + int val; + + switch (channel) { + case OMAP_DSS_CHANNEL_LCD: + val = 1; + break; + case OMAP_DSS_CHANNEL_LCD2: + val = 2; + break; + case OMAP_DSS_CHANNEL_LCD3: + val = 3; + break; + case OMAP_DSS_CHANNEL_DIGIT: + val = 0; + break; + default: + return -EINVAL; + } + + REG_FLD_MOD(DSS_CONTROL, val, 17, 16); + + return 0; +} + +int dss_dpi_select_source(enum omap_channel channel) +{ + return dss.feat->dpi_select_source(channel); +} + +static int dss_get_clocks(void) +{ + struct clk *clk; + + clk = devm_clk_get(&dss.pdev->dev, "fck"); + if (IS_ERR(clk)) { + DSSERR("can't get clock fck\n"); + return PTR_ERR(clk); + } + + dss.dss_clk = clk; + + if (dss.feat->parent_clk_name) { + clk = clk_get(NULL, dss.feat->parent_clk_name); + if (IS_ERR(clk)) { + DSSERR("Failed to get %s\n", dss.feat->parent_clk_name); + return PTR_ERR(clk); + } + } else { + clk = NULL; + } + + dss.parent_clk = clk; + + return 0; +} + +static void dss_put_clocks(void) +{ + if (dss.parent_clk) + clk_put(dss.parent_clk); +} + +static int dss_runtime_get(void) +{ + int r; + + DSSDBG("dss_runtime_get\n"); + + r = pm_runtime_get_sync(&dss.pdev->dev); + WARN_ON(r < 0); + return r < 0 ? r : 0; +} + +static void dss_runtime_put(void) +{ + int r; + + DSSDBG("dss_runtime_put\n"); + + r = pm_runtime_put_sync(&dss.pdev->dev); + WARN_ON(r < 0 && r != -ENOSYS && r != -EBUSY); +} + +/* DEBUGFS */ +#if defined(CONFIG_OMAP2_DSS_DEBUGFS) +void dss_debug_dump_clocks(struct seq_file *s) +{ + dss_dump_clocks(s); + dispc_dump_clocks(s); +#ifdef CONFIG_OMAP2_DSS_DSI + dsi_dump_clocks(s); +#endif +} +#endif + +static const struct dss_features omap24xx_dss_feats __initconst = { + /* + * fck div max is really 16, but the divider range has gaps. The range + * from 1 to 6 has no gaps, so let's use that as a max. + */ + .fck_div_max = 6, + .dss_fck_multiplier = 2, + .parent_clk_name = "core_ck", + .dpi_select_source = &dss_dpi_select_source_omap2_omap3, +}; + +static const struct dss_features omap34xx_dss_feats __initconst = { + .fck_div_max = 16, + .dss_fck_multiplier = 2, + .parent_clk_name = "dpll4_ck", + .dpi_select_source = &dss_dpi_select_source_omap2_omap3, +}; + +static const struct dss_features omap3630_dss_feats __initconst = { + .fck_div_max = 32, + .dss_fck_multiplier = 1, + .parent_clk_name = "dpll4_ck", + .dpi_select_source = &dss_dpi_select_source_omap2_omap3, +}; + +static const struct dss_features omap44xx_dss_feats __initconst = { + .fck_div_max = 32, + .dss_fck_multiplier = 1, + .parent_clk_name = "dpll_per_x2_ck", + .dpi_select_source = &dss_dpi_select_source_omap4, +}; + +static const struct dss_features omap54xx_dss_feats __initconst = { + .fck_div_max = 64, + .dss_fck_multiplier = 1, + .parent_clk_name = "dpll_per_x2_ck", + .dpi_select_source = &dss_dpi_select_source_omap5, +}; + +static int __init dss_init_features(struct platform_device *pdev) +{ + const struct dss_features *src; + struct dss_features *dst; + + dst = devm_kzalloc(&pdev->dev, sizeof(*dst), GFP_KERNEL); + if (!dst) { + dev_err(&pdev->dev, "Failed to allocate local DSS Features\n"); + return -ENOMEM; + } + + switch (omapdss_get_version()) { + case OMAPDSS_VER_OMAP24xx: + src = &omap24xx_dss_feats; + break; + + case OMAPDSS_VER_OMAP34xx_ES1: + case OMAPDSS_VER_OMAP34xx_ES3: + case OMAPDSS_VER_AM35xx: + src = &omap34xx_dss_feats; + break; + + case OMAPDSS_VER_OMAP3630: + src = &omap3630_dss_feats; + break; + + case OMAPDSS_VER_OMAP4430_ES1: + case OMAPDSS_VER_OMAP4430_ES2: + case OMAPDSS_VER_OMAP4: + src = &omap44xx_dss_feats; + break; + + case OMAPDSS_VER_OMAP5: + src = &omap54xx_dss_feats; + break; + + default: + return -ENODEV; + } + + memcpy(dst, src, sizeof(*dst)); + dss.feat = dst; + + return 0; +} + +static int __init dss_init_ports(struct platform_device *pdev) +{ + struct device_node *parent = pdev->dev.of_node; + struct device_node *port; + int r; + + if (parent == NULL) + return 0; + + port = omapdss_of_get_next_port(parent, NULL); + if (!port) { +#ifdef CONFIG_OMAP2_DSS_DPI + dpi_init_port(pdev, parent); +#endif + return 0; + } + + do { + u32 reg; + + r = of_property_read_u32(port, "reg", ®); + if (r) + reg = 0; + +#ifdef CONFIG_OMAP2_DSS_DPI + if (reg == 0) + dpi_init_port(pdev, port); +#endif + +#ifdef CONFIG_OMAP2_DSS_SDI + if (reg == 1) + sdi_init_port(pdev, port); +#endif + + } while ((port = omapdss_of_get_next_port(parent, port)) != NULL); + + return 0; +} + +static void dss_uninit_ports(void) +{ +#ifdef CONFIG_OMAP2_DSS_DPI + dpi_uninit_port(); +#endif + +#ifdef CONFIG_OMAP2_DSS_SDI + sdi_uninit_port(); +#endif +} + +/* DSS HW IP initialisation */ +static int __init omap_dsshw_probe(struct platform_device *pdev) +{ + struct resource *dss_mem; + u32 rev; + int r; + + dss.pdev = pdev; + + r = dss_init_features(dss.pdev); + if (r) + return r; + + dss_mem = platform_get_resource(dss.pdev, IORESOURCE_MEM, 0); + if (!dss_mem) { + DSSERR("can't get IORESOURCE_MEM DSS\n"); + return -EINVAL; + } + + dss.base = devm_ioremap(&pdev->dev, dss_mem->start, + resource_size(dss_mem)); + if (!dss.base) { + DSSERR("can't ioremap DSS\n"); + return -ENOMEM; + } + + r = dss_get_clocks(); + if (r) + return r; + + r = dss_setup_default_clock(); + if (r) + goto err_setup_clocks; + + pm_runtime_enable(&pdev->dev); + + r = dss_runtime_get(); + if (r) + goto err_runtime_get; + + dss.dss_clk_rate = clk_get_rate(dss.dss_clk); + + /* Select DPLL */ + REG_FLD_MOD(DSS_CONTROL, 0, 0, 0); + + dss_select_dispc_clk_source(OMAP_DSS_CLK_SRC_FCK); + +#ifdef CONFIG_OMAP2_DSS_VENC + REG_FLD_MOD(DSS_CONTROL, 1, 4, 4); /* venc dac demen */ + REG_FLD_MOD(DSS_CONTROL, 1, 3, 3); /* venc clock 4x enable */ + REG_FLD_MOD(DSS_CONTROL, 0, 2, 2); /* venc clock mode = normal */ +#endif + dss.dsi_clk_source[0] = OMAP_DSS_CLK_SRC_FCK; + dss.dsi_clk_source[1] = OMAP_DSS_CLK_SRC_FCK; + dss.dispc_clk_source = OMAP_DSS_CLK_SRC_FCK; + dss.lcd_clk_source[0] = OMAP_DSS_CLK_SRC_FCK; + dss.lcd_clk_source[1] = OMAP_DSS_CLK_SRC_FCK; + + dss_init_ports(pdev); + + rev = dss_read_reg(DSS_REVISION); + printk(KERN_INFO "OMAP DSS rev %d.%d\n", + FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0)); + + dss_runtime_put(); + + dss_debugfs_create_file("dss", dss_dump_regs); + + return 0; + +err_runtime_get: + pm_runtime_disable(&pdev->dev); +err_setup_clocks: + dss_put_clocks(); + return r; +} + +static int __exit omap_dsshw_remove(struct platform_device *pdev) +{ + dss_uninit_ports(); + + pm_runtime_disable(&pdev->dev); + + dss_put_clocks(); + + return 0; +} + +static int dss_runtime_suspend(struct device *dev) +{ + dss_save_context(); + dss_set_min_bus_tput(dev, 0); + return 0; +} + +static int dss_runtime_resume(struct device *dev) +{ + int r; + /* + * Set an arbitrarily high tput request to ensure OPP100. + * What we should really do is to make a request to stay in OPP100, + * without any tput requirements, but that is not currently possible + * via the PM layer. + */ + + r = dss_set_min_bus_tput(dev, 1000000000); + if (r) + return r; + + dss_restore_context(); + return 0; +} + +static const struct dev_pm_ops dss_pm_ops = { + .runtime_suspend = dss_runtime_suspend, + .runtime_resume = dss_runtime_resume, +}; + +static const struct of_device_id dss_of_match[] = { + { .compatible = "ti,omap2-dss", }, + { .compatible = "ti,omap3-dss", }, + { .compatible = "ti,omap4-dss", }, + {}, +}; + +MODULE_DEVICE_TABLE(of, dss_of_match); + +static struct platform_driver omap_dsshw_driver = { + .remove = __exit_p(omap_dsshw_remove), + .driver = { + .name = "omapdss_dss", + .owner = THIS_MODULE, + .pm = &dss_pm_ops, + .of_match_table = dss_of_match, + }, +}; + +int __init dss_init_platform_driver(void) +{ + return platform_driver_probe(&omap_dsshw_driver, omap_dsshw_probe); +} + +void dss_uninit_platform_driver(void) +{ + platform_driver_unregister(&omap_dsshw_driver); +} |
