diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/video/geode/lxfb.h | 45 | ||||
| -rw-r--r-- | drivers/video/geode/lxfb_core.c | 41 | ||||
| -rw-r--r-- | drivers/video/geode/lxfb_ops.c | 263 |
3 files changed, 340 insertions, 9 deletions
diff --git a/drivers/video/geode/lxfb.h b/drivers/video/geode/lxfb.h index b3fbc56ccbd..3b9416f4ee2 100644 --- a/drivers/video/geode/lxfb.h +++ b/drivers/video/geode/lxfb.h @@ -3,6 +3,16 @@ #include <linux/fb.h> +#define GP_REG_COUNT (0x7c / 4) +#define DC_REG_COUNT (0xf0 / 4) +#define VP_REG_COUNT (0x158 / 8) +#define FP_REG_COUNT (0x60 / 8) + +#define DC_PAL_COUNT 0x104 +#define DC_HFILT_COUNT 0x100 +#define DC_VFILT_COUNT 0x100 +#define VP_COEFF_SIZE 0x1000 + #define OUTPUT_CRT 0x01 #define OUTPUT_PANEL 0x02 @@ -12,6 +22,27 @@ struct lxfb_par { void __iomem *gp_regs; void __iomem *dc_regs; void __iomem *vp_regs; +#ifdef CONFIG_PM + int powered_down; + + /* register state, for power mgmt functionality */ + struct { + uint64_t padsel; + uint64_t dotpll; + uint64_t dfglcfg; + uint64_t dcspare; + } msr; + + uint32_t gp[GP_REG_COUNT]; + uint32_t dc[DC_REG_COUNT]; + uint64_t vp[VP_REG_COUNT]; + uint64_t fp[FP_REG_COUNT]; + + uint32_t pal[DC_PAL_COUNT]; + uint32_t hcoeff[DC_HFILT_COUNT * 2]; + uint32_t vcoeff[DC_VFILT_COUNT]; + uint32_t vp_coeff[VP_COEFF_SIZE / 4]; +#endif }; static inline unsigned int lx_get_pitch(unsigned int xres, int bpp) @@ -27,6 +58,11 @@ int lx_blank_display(struct fb_info *, int); void lx_set_palette_reg(struct fb_info *, unsigned int, unsigned int, unsigned int, unsigned int); +#ifdef CONFIG_PM +int lx_powerdown(struct fb_info *info); +int lx_powerup(struct fb_info *info); +#endif + /* Graphics Processor registers (table 6-29 from the data book) */ enum gp_registers { @@ -182,6 +218,9 @@ enum dc_registers { #define DC_DV_CTL_DV_LINE_SIZE_2K (1 << 10) #define DC_DV_CTL_DV_LINE_SIZE_4K (1 << 11) #define DC_DV_CTL_DV_LINE_SIZE_8K ((1 << 10) | (1 << 11)) +#define DC_DV_CTL_CLEAR_DV_RAM (1 << 0) + +#define DC_IRQ_FILT_CTL_H_FILT_SEL (1 << 10) #define DC_CLR_KEY_CLR_KEY_EN (1 << 24) @@ -267,6 +306,8 @@ enum vp_registers { VP_A2YE, VP_A3YE, /* 0x150 */ + + VP_VCR = 0x1000, /* 0x1000 - 0x1fff */ }; #define VP_VCFG_VID_EN (1 << 0) @@ -319,6 +360,10 @@ enum fp_registers { #define FP_PT2_SCRC (1 << 27) /* shfclk free */ #define FP_PM_P (1 << 24) /* panel power ctl */ +#define FP_PM_PANEL_PWR_UP (1 << 3) /* r/o */ +#define FP_PM_PANEL_PWR_DOWN (1 << 2) /* r/o */ +#define FP_PM_PANEL_OFF (1 << 1) /* r/o */ +#define FP_PM_PANEL_ON (1 << 0) /* r/o */ #define FP_DFC_BC ((1 << 4) | (1 << 5) | (1 << 6)) diff --git a/drivers/video/geode/lxfb_core.c b/drivers/video/geode/lxfb_core.c index 19eabef1077..b565882eee3 100644 --- a/drivers/video/geode/lxfb_core.c +++ b/drivers/video/geode/lxfb_core.c @@ -428,6 +428,45 @@ static struct fb_info * __init lxfb_init_fbinfo(struct device *dev) return info; } +#ifdef CONFIG_PM +static int lxfb_suspend(struct pci_dev *pdev, pm_message_t state) +{ + struct fb_info *info = pci_get_drvdata(pdev); + + if (state.event == PM_EVENT_SUSPEND) { + acquire_console_sem(); + lx_powerdown(info); + fb_set_suspend(info, 1); + release_console_sem(); + } + + /* there's no point in setting PCI states; we emulate PCI, so + * we don't end up getting power savings anyways */ + + return 0; +} + +static int lxfb_resume(struct pci_dev *pdev) +{ + struct fb_info *info = pci_get_drvdata(pdev); + int ret; + + acquire_console_sem(); + ret = lx_powerup(info); + if (ret) { + printk(KERN_ERR "lxfb: power up failed!\n"); + return ret; + } + + fb_set_suspend(info, 0); + release_console_sem(); + return 0; +} +#else +#define lxfb_suspend NULL +#define lxfb_resume NULL +#endif + static int __init lxfb_probe(struct pci_dev *pdev, const struct pci_device_id *id) { @@ -553,6 +592,8 @@ static struct pci_driver lxfb_driver = { .id_table = lxfb_id_table, .probe = lxfb_probe, .remove = lxfb_remove, + .suspend = lxfb_suspend, + .resume = lxfb_resume, }; #ifndef MODULE diff --git a/drivers/video/geode/lxfb_ops.c b/drivers/video/geode/lxfb_ops.c index a68def88c92..7abc439101c 100644 --- a/drivers/video/geode/lxfb_ops.c +++ b/drivers/video/geode/lxfb_ops.c @@ -232,8 +232,8 @@ static void lx_graphics_disable(struct fb_info *info) val = read_dc(par, DC_CLR_KEY); write_dc(par, DC_CLR_KEY, val & ~DC_CLR_KEY_CLR_KEY_EN); - /* We don't actually blank the panel, due to the long latency - involved with bringing it back */ + /* turn off the panel */ + write_fp(par, FP_PM, read_fp(par, FP_PM) & ~FP_PM_P); val = read_vp(par, VP_MISC) | VP_MISC_DACPWRDN; write_vp(par, VP_MISC, val); @@ -321,13 +321,8 @@ static void lx_graphics_enable(struct fb_info *info) } /* Turn the panel on (if it isn't already) */ - - if (par->output & OUTPUT_PANEL) { - temp = read_fp(par, FP_PM); - - if (!(temp & 0x09)) - write_fp(par, FP_PM, temp | FP_PM_P); - } + if (par->output & OUTPUT_PANEL) + write_fp(par, FP_PM, read_fp(par, FP_PM) | FP_PM_P); } unsigned int lx_framebuffer_size(void) @@ -575,3 +570,253 @@ int lx_blank_display(struct fb_info *info, int blank_mode) return 0; } + +#ifdef CONFIG_PM + +static void lx_save_regs(struct lxfb_par *par) +{ + uint32_t filt; + int i; + + /* wait for the BLT engine to stop being busy */ + do { + i = read_gp(par, GP_BLT_STATUS); + } while ((i & GP_BLT_STATUS_PB) || !(i & GP_BLT_STATUS_CE)); + + /* save MSRs */ + rdmsrl(MSR_LX_MSR_PADSEL, par->msr.padsel); + rdmsrl(MSR_GLCP_DOTPLL, par->msr.dotpll); + rdmsrl(MSR_LX_GLD_MSR_CONFIG, par->msr.dfglcfg); + rdmsrl(MSR_LX_SPARE_MSR, par->msr.dcspare); + + write_dc(par, DC_UNLOCK, DC_UNLOCK_UNLOCK); + + /* save registers */ + memcpy(par->gp, par->gp_regs, sizeof(par->gp)); + memcpy(par->dc, par->dc_regs, sizeof(par->dc)); + memcpy(par->vp, par->vp_regs, sizeof(par->vp)); + memcpy(par->fp, par->vp_regs + VP_FP_START, sizeof(par->fp)); + + /* save the palette */ + write_dc(par, DC_PAL_ADDRESS, 0); + for (i = 0; i < ARRAY_SIZE(par->pal); i++) + par->pal[i] = read_dc(par, DC_PAL_DATA); + + /* save the horizontal filter coefficients */ + filt = par->dc[DC_IRQ_FILT_CTL] | DC_IRQ_FILT_CTL_H_FILT_SEL; + for (i = 0; i < ARRAY_SIZE(par->hcoeff); i += 2) { + write_dc(par, DC_IRQ_FILT_CTL, (filt & 0xffffff00) | i); + par->hcoeff[i] = read_dc(par, DC_FILT_COEFF1); + par->hcoeff[i + 1] = read_dc(par, DC_FILT_COEFF2); + } + + /* save the vertical filter coefficients */ + filt &= ~DC_IRQ_FILT_CTL_H_FILT_SEL; + for (i = 0; i < ARRAY_SIZE(par->vcoeff); i++) { + write_dc(par, DC_IRQ_FILT_CTL, (filt & 0xffffff00) | i); + par->vcoeff[i] = read_dc(par, DC_FILT_COEFF1); + } + + /* save video coeff ram */ + memcpy(par->vp_coeff, par->vp_regs + VP_VCR, sizeof(par->vp_coeff)); +} + +static void lx_restore_gfx_proc(struct lxfb_par *par) +{ + int i; + + /* a bunch of registers require GP_RASTER_MODE to be set first */ + write_gp(par, GP_RASTER_MODE, par->gp[GP_RASTER_MODE]); + + for (i = 0; i < ARRAY_SIZE(par->gp); i++) { + switch (i) { + case GP_RASTER_MODE: + case GP_VECTOR_MODE: + case GP_BLT_MODE: + case GP_BLT_STATUS: + case GP_HST_SRC: + /* FIXME: restore LUT data */ + case GP_LUT_INDEX: + case GP_LUT_DATA: + /* don't restore these registers */ + break; + + default: + write_gp(par, i, par->gp[i]); + } + } +} + +static void lx_restore_display_ctlr(struct lxfb_par *par) +{ + uint32_t filt; + int i; + + wrmsrl(MSR_LX_SPARE_MSR, par->msr.dcspare); + + for (i = 0; i < ARRAY_SIZE(par->dc); i++) { + switch (i) { + case DC_UNLOCK: + /* unlock the DC; runs first */ + write_dc(par, DC_UNLOCK, DC_UNLOCK_UNLOCK); + break; + + case DC_GENERAL_CFG: + case DC_DISPLAY_CFG: + /* disable all while restoring */ + write_dc(par, i, 0); + break; + + case DC_DV_CTL: + /* set all ram to dirty */ + write_dc(par, i, par->dc[i] | DC_DV_CTL_CLEAR_DV_RAM); + + case DC_RSVD_1: + case DC_RSVD_2: + case DC_RSVD_3: + case DC_LINE_CNT: + case DC_PAL_ADDRESS: + case DC_PAL_DATA: + case DC_DFIFO_DIAG: + case DC_CFIFO_DIAG: + case DC_FILT_COEFF1: + case DC_FILT_COEFF2: + case DC_RSVD_4: + case DC_RSVD_5: + /* don't restore these registers */ + break; + + default: + write_dc(par, i, par->dc[i]); + } + } + + /* restore the palette */ + write_dc(par, DC_PAL_ADDRESS, 0); + for (i = 0; i < ARRAY_SIZE(par->pal); i++) + write_dc(par, DC_PAL_DATA, par->pal[i]); + + /* restore the horizontal filter coefficients */ + filt = par->dc[DC_IRQ_FILT_CTL] | DC_IRQ_FILT_CTL_H_FILT_SEL; + for (i = 0; i < ARRAY_SIZE(par->hcoeff); i += 2) { + write_dc(par, DC_IRQ_FILT_CTL, (filt & 0xffffff00) | i); + write_dc(par, DC_FILT_COEFF1, par->hcoeff[i]); + write_dc(par, DC_FILT_COEFF2, par->hcoeff[i + 1]); + } + + /* restore the vertical filter coefficients */ + filt &= ~DC_IRQ_FILT_CTL_H_FILT_SEL; + for (i = 0; i < ARRAY_SIZE(par->vcoeff); i++) { + write_dc(par, DC_IRQ_FILT_CTL, (filt & 0xffffff00) | i); + write_dc(par, DC_FILT_COEFF1, par->vcoeff[i]); + } +} + +static void lx_restore_video_proc(struct lxfb_par *par) +{ + int i; + + wrmsrl(MSR_LX_GLD_MSR_CONFIG, par->msr.dfglcfg); + wrmsrl(MSR_LX_MSR_PADSEL, par->msr.padsel); + + for (i = 0; i < ARRAY_SIZE(par->vp); i++) { + switch (i) { + case VP_VCFG: + case VP_DCFG: + case VP_PAR: + case VP_PDR: + case VP_CCS: + case VP_RSVD_0: + /* case VP_VDC: */ /* why should this not be restored? */ + case VP_RSVD_1: + case VP_CRC32: + /* don't restore these registers */ + break; + + default: + write_vp(par, i, par->vp[i]); + } + } + + /* restore video coeff ram */ + memcpy(par->vp_regs + VP_VCR, par->vp_coeff, sizeof(par->vp_coeff)); +} + +static void lx_restore_regs(struct lxfb_par *par) +{ + int i; + + lx_set_dotpll((u32) (par->msr.dotpll >> 32)); + lx_restore_gfx_proc(par); + lx_restore_display_ctlr(par); + lx_restore_video_proc(par); + + /* Flat Panel */ + for (i = 0; i < ARRAY_SIZE(par->fp); i++) { + switch (i) { + case FP_PM: + case FP_RSVD_0: + case FP_RSVD_1: + case FP_RSVD_2: + case FP_RSVD_3: + case FP_RSVD_4: + /* don't restore these registers */ + break; + + default: + write_fp(par, i, par->fp[i]); + } + } + + /* control the panel */ + if (par->fp[FP_PM] & FP_PM_P) { + /* power on the panel if not already power{ed,ing} on */ + if (!(read_fp(par, FP_PM) & + (FP_PM_PANEL_ON|FP_PM_PANEL_PWR_UP))) + write_fp(par, FP_PM, par->fp[FP_PM]); + } else { + /* power down the panel if not already power{ed,ing} down */ + if (!(read_fp(par, FP_PM) & + (FP_PM_PANEL_OFF|FP_PM_PANEL_PWR_DOWN))) + write_fp(par, FP_PM, par->fp[FP_PM]); + } + + /* turn everything on */ + write_vp(par, VP_VCFG, par->vp[VP_VCFG]); + write_vp(par, VP_DCFG, par->vp[VP_DCFG]); + write_dc(par, DC_DISPLAY_CFG, par->dc[DC_DISPLAY_CFG]); + /* do this last; it will enable the FIFO load */ + write_dc(par, DC_GENERAL_CFG, par->dc[DC_GENERAL_CFG]); + + /* lock the door behind us */ + write_dc(par, DC_UNLOCK, DC_UNLOCK_LOCK); +} + +int lx_powerdown(struct fb_info *info) +{ + struct lxfb_par *par = info->par; + + if (par->powered_down) + return 0; + + lx_save_regs(par); + lx_graphics_disable(info); + + par->powered_down = 1; + return 0; +} + +int lx_powerup(struct fb_info *info) +{ + struct lxfb_par *par = info->par; + + if (!par->powered_down) + return 0; + + lx_restore_regs(par); + + par->powered_down = 0; + return 0; +} + +#endif |