diff options
Diffstat (limited to 'drivers/video/sh_mipi_dsi.c')
| -rw-r--r-- | drivers/video/sh_mipi_dsi.c | 129 |
1 files changed, 101 insertions, 28 deletions
diff --git a/drivers/video/sh_mipi_dsi.c b/drivers/video/sh_mipi_dsi.c index 3f3d431033c..24640c8458a 100644 --- a/drivers/video/sh_mipi_dsi.c +++ b/drivers/video/sh_mipi_dsi.c @@ -13,6 +13,7 @@ #include <linux/init.h> #include <linux/io.h> #include <linux/platform_device.h> +#include <linux/pm_runtime.h> #include <linux/slab.h> #include <linux/string.h> #include <linux/types.h> @@ -21,18 +22,40 @@ #include <video/sh_mipi_dsi.h> #include <video/sh_mobile_lcdc.h> -#define CMTSRTCTR 0x80d0 -#define CMTSRTREQ 0x8070 - +#define SYSCTRL 0x0000 +#define SYSCONF 0x0004 +#define TIMSET 0x0008 +#define RESREQSET0 0x0018 +#define RESREQSET1 0x001c +#define HSTTOVSET 0x0020 +#define LPRTOVSET 0x0024 +#define TATOVSET 0x0028 +#define PRTOVSET 0x002c +#define DSICTRL 0x0030 #define DSIINTE 0x0060 +#define PHYCTRL 0x0070 + +/* relative to linkbase */ +#define DTCTR 0x0000 +#define VMCTR1 0x0020 +#define VMCTR2 0x0024 +#define VMLEN1 0x0028 +#define CMTSRTREQ 0x0070 +#define CMTSRTCTR 0x00d0 /* E.g., sh7372 has 2 MIPI-DSIs - one for each LCDC */ #define MAX_SH_MIPI_DSI 2 struct sh_mipi { void __iomem *base; + void __iomem *linkbase; struct clk *dsit_clk; struct clk *dsip_clk; + struct device *dev; + + void *next_board_data; + void (*next_display_on)(void *board_data, struct fb_info *info); + void (*next_display_off)(void *board_data); }; static struct sh_mipi *mipi_dsi[MAX_SH_MIPI_DSI]; @@ -55,10 +78,10 @@ static int sh_mipi_send_short(struct sh_mipi *mipi, u8 dsi_cmd, int cnt = 100; /* transmit a short packet to LCD panel */ - iowrite32(1 | data, mipi->base + 0x80d0); /* CMTSRTCTR */ - iowrite32(1, mipi->base + 0x8070); /* CMTSRTREQ */ + iowrite32(1 | data, mipi->linkbase + CMTSRTCTR); + iowrite32(1, mipi->linkbase + CMTSRTREQ); - while ((ioread32(mipi->base + 0x8070) & 1) && --cnt) + while ((ioread32(mipi->linkbase + CMTSRTREQ) & 1) && --cnt) udelay(1); return cnt ? 0 : -ETIMEDOUT; @@ -90,7 +113,7 @@ static void sh_mipi_dsi_enable(struct sh_mipi *mipi, bool enable) * enable LCDC data tx, transition to LPS after completion of each HS * packet */ - iowrite32(0x00000002 | enable, mipi->base + 0x8000); /* DTCTR */ + iowrite32(0x00000002 | enable, mipi->linkbase + DTCTR); } static void sh_mipi_shutdown(struct platform_device *pdev) @@ -104,14 +127,22 @@ static void mipi_display_on(void *arg, struct fb_info *info) { struct sh_mipi *mipi = arg; + pm_runtime_get_sync(mipi->dev); sh_mipi_dsi_enable(mipi, true); + + if (mipi->next_display_on) + mipi->next_display_on(mipi->next_board_data, info); } static void mipi_display_off(void *arg) { struct sh_mipi *mipi = arg; + if (mipi->next_display_off) + mipi->next_display_off(mipi->next_board_data); + sh_mipi_dsi_enable(mipi, false); + pm_runtime_put(mipi->dev); } static int __init sh_mipi_setup(struct sh_mipi *mipi, @@ -119,8 +150,7 @@ static int __init sh_mipi_setup(struct sh_mipi *mipi, { void __iomem *base = mipi->base; struct sh_mobile_lcdc_chan_cfg *ch = pdata->lcd_chan; - u32 pctype, datatype, pixfmt; - u32 linelength; + u32 pctype, datatype, pixfmt, linelength, vmctr2 = 0x00e00000; bool yuv; /* @@ -223,10 +253,10 @@ static int __init sh_mipi_setup(struct sh_mipi *mipi, return -EINVAL; /* reset DSI link */ - iowrite32(0x00000001, base); /* SYSCTRL */ + iowrite32(0x00000001, base + SYSCTRL); /* Hold reset for 100 cycles of the slowest of bus, HS byte and LP clock */ udelay(50); - iowrite32(0x00000000, base); /* SYSCTRL */ + iowrite32(0x00000000, base + SYSCTRL); /* setup DSI link */ @@ -238,7 +268,7 @@ static int __init sh_mipi_setup(struct sh_mipi *mipi, * ECC check enable * additionally enable first two lanes */ - iowrite32(0x00003703, base + 0x04); /* SYSCONF */ + iowrite32(0x00003703, base + SYSCONF); /* * T_wakeup = 0x7000 * T_hs-trail = 3 @@ -246,28 +276,28 @@ static int __init sh_mipi_setup(struct sh_mipi *mipi, * T_clk-trail = 3 * T_clk-prepare = 2 */ - iowrite32(0x70003332, base + 0x08); /* TIMSET */ + iowrite32(0x70003332, base + TIMSET); /* no responses requested */ - iowrite32(0x00000000, base + 0x18); /* RESREQSET0 */ + iowrite32(0x00000000, base + RESREQSET0); /* request response to packets of type 0x28 */ - iowrite32(0x00000100, base + 0x1c); /* RESREQSET1 */ + iowrite32(0x00000100, base + RESREQSET1); /* High-speed transmission timeout, default 0xffffffff */ - iowrite32(0x0fffffff, base + 0x20); /* HSTTOVSET */ + iowrite32(0x0fffffff, base + HSTTOVSET); /* LP reception timeout, default 0xffffffff */ - iowrite32(0x0fffffff, base + 0x24); /* LPRTOVSET */ + iowrite32(0x0fffffff, base + LPRTOVSET); /* Turn-around timeout, default 0xffffffff */ - iowrite32(0x0fffffff, base + 0x28); /* TATOVSET */ + iowrite32(0x0fffffff, base + TATOVSET); /* Peripheral reset timeout, default 0xffffffff */ - iowrite32(0x0fffffff, base + 0x2c); /* PRTOVSET */ + iowrite32(0x0fffffff, base + PRTOVSET); /* Enable timeout counters */ - iowrite32(0x00000f00, base + 0x30); /* DSICTRL */ + iowrite32(0x00000f00, base + DSICTRL); /* Interrupts not used, disable all */ iowrite32(0, base + DSIINTE); /* DSI-Tx bias on */ - iowrite32(0x00000001, base + 0x70); /* PHYCTRL */ + iowrite32(0x00000001, base + PHYCTRL); udelay(200); /* Deassert resets, power on, set multiplier */ - iowrite32(0x03070b01, base + 0x70); /* PHYCTRL */ + iowrite32(0x03070b01, base + PHYCTRL); /* setup l-bridge */ @@ -275,20 +305,28 @@ static int __init sh_mipi_setup(struct sh_mipi *mipi, * Enable transmission of all packets, * transmit LPS after each HS packet completion */ - iowrite32(0x00000006, base + 0x8000); /* DTCTR */ + iowrite32(0x00000006, mipi->linkbase + DTCTR); /* VSYNC width = 2 (<< 17) */ - iowrite32(0x00040000 | (pctype << 12) | datatype, base + 0x8020); /* VMCTR1 */ + iowrite32((ch->lcd_cfg[0].vsync_len << pdata->vsynw_offset) | + (pdata->clksrc << 16) | (pctype << 12) | datatype, + mipi->linkbase + VMCTR1); + /* * Non-burst mode with sync pulses: VSE and HSE are output, * HSA period allowed, no commands in LP */ - iowrite32(0x00e00000, base + 0x8024); /* VMCTR2 */ + if (pdata->flags & SH_MIPI_DSI_HSABM) + vmctr2 |= 0x20; + if (pdata->flags & SH_MIPI_DSI_HSPBM) + vmctr2 |= 0x10; + iowrite32(vmctr2, mipi->linkbase + VMCTR2); + /* * 0x660 = 1632 bytes per line (RGB24, 544 pixels: see * sh_mobile_lcdc_info.ch[0].lcd_cfg[0].xres), HSALEN = 1 - default - * (unused, since VMCTR2[HSABM] = 0) + * (unused if VMCTR2[HSABM] = 0) */ - iowrite32(1 | (linelength << 16), base + 0x8028); /* VMLEN1 */ + iowrite32(1 | (linelength << 16), mipi->linkbase + VMLEN1); msleep(5); @@ -321,11 +359,12 @@ static int __init sh_mipi_probe(struct platform_device *pdev) struct sh_mipi *mipi; struct sh_mipi_dsi_info *pdata = pdev->dev.platform_data; struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + struct resource *res2 = platform_get_resource(pdev, IORESOURCE_MEM, 1); unsigned long rate, f_current; int idx = pdev->id, ret; char dsip_clk[] = "dsi.p_clk"; - if (!res || idx >= ARRAY_SIZE(mipi_dsi) || !pdata) + if (!res || !res2 || idx >= ARRAY_SIZE(mipi_dsi) || !pdata) return -ENODEV; mutex_lock(&array_lock); @@ -356,6 +395,20 @@ static int __init sh_mipi_probe(struct platform_device *pdev) goto emap; } + if (!request_mem_region(res2->start, resource_size(res2), pdev->name)) { + dev_err(&pdev->dev, "MIPI register region 2 already claimed\n"); + ret = -EBUSY; + goto ereqreg2; + } + + mipi->linkbase = ioremap(res2->start, resource_size(res2)); + if (!mipi->linkbase) { + ret = -ENOMEM; + goto emap2; + } + + mipi->dev = &pdev->dev; + mipi->dsit_clk = clk_get(&pdev->dev, "dsit_clk"); if (IS_ERR(mipi->dsit_clk)) { ret = PTR_ERR(mipi->dsit_clk); @@ -405,6 +458,9 @@ static int __init sh_mipi_probe(struct platform_device *pdev) mipi_dsi[idx] = mipi; + pm_runtime_enable(&pdev->dev); + pm_runtime_resume(&pdev->dev); + ret = sh_mipi_setup(mipi, pdata); if (ret < 0) goto emipisetup; @@ -412,15 +468,22 @@ static int __init sh_mipi_probe(struct platform_device *pdev) mutex_unlock(&array_lock); platform_set_drvdata(pdev, mipi); + /* Save original LCDC callbacks */ + mipi->next_board_data = pdata->lcd_chan->board_cfg.board_data; + mipi->next_display_on = pdata->lcd_chan->board_cfg.display_on; + mipi->next_display_off = pdata->lcd_chan->board_cfg.display_off; + /* Set up LCDC callbacks */ pdata->lcd_chan->board_cfg.board_data = mipi; pdata->lcd_chan->board_cfg.display_on = mipi_display_on; pdata->lcd_chan->board_cfg.display_off = mipi_display_off; + pdata->lcd_chan->board_cfg.owner = THIS_MODULE; return 0; emipisetup: mipi_dsi[idx] = NULL; + pm_runtime_disable(&pdev->dev); clk_disable(mipi->dsip_clk); eclkpon: clk_disable(mipi->dsit_clk); @@ -431,6 +494,10 @@ eclkpget: esettrate: clk_put(mipi->dsit_clk); eclktget: + iounmap(mipi->linkbase); +emap2: + release_mem_region(res2->start, resource_size(res2)); +ereqreg2: iounmap(mipi->base); emap: release_mem_region(res->start, resource_size(res)); @@ -447,6 +514,7 @@ static int __exit sh_mipi_remove(struct platform_device *pdev) { struct sh_mipi_dsi_info *pdata = pdev->dev.platform_data; struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + struct resource *res2 = platform_get_resource(pdev, IORESOURCE_MEM, 1); struct sh_mipi *mipi = platform_get_drvdata(pdev); int i, ret; @@ -467,14 +535,19 @@ static int __exit sh_mipi_remove(struct platform_device *pdev) if (ret < 0) return ret; + pdata->lcd_chan->board_cfg.owner = NULL; pdata->lcd_chan->board_cfg.display_on = NULL; pdata->lcd_chan->board_cfg.display_off = NULL; pdata->lcd_chan->board_cfg.board_data = NULL; + pm_runtime_disable(&pdev->dev); clk_disable(mipi->dsip_clk); clk_disable(mipi->dsit_clk); clk_put(mipi->dsit_clk); clk_put(mipi->dsip_clk); + iounmap(mipi->linkbase); + if (res2) + release_mem_region(res2->start, resource_size(res2)); iounmap(mipi->base); if (res) release_mem_region(res->start, resource_size(res)); |