diff options
Diffstat (limited to 'drivers/video/omap2/dss/rfbi.c')
| -rw-r--r-- | drivers/video/omap2/dss/rfbi.c | 176 |
1 files changed, 30 insertions, 146 deletions
diff --git a/drivers/video/omap2/dss/rfbi.c b/drivers/video/omap2/dss/rfbi.c index 5ea17f4..c06fbe0 100644 --- a/drivers/video/omap2/dss/rfbi.c +++ b/drivers/video/omap2/dss/rfbi.c @@ -32,8 +32,9 @@ #include <linux/ktime.h> #include <linux/hrtimer.h> #include <linux/seq_file.h> +#include <linux/semaphore.h> -#include <plat/display.h> +#include <video/omapdss.h> #include "dss.h" struct rfbi_reg { u16 idx; }; @@ -65,9 +66,6 @@ struct rfbi_reg { u16 idx; }; #define REG_FLD_MOD(idx, val, start, end) \ rfbi_write_reg(idx, FLD_MOD(rfbi_read_reg(idx), val, start, end)) -/* To work around an RFBI transfer rate limitation */ -#define OMAP_RFBI_RATE_LIMIT 1 - enum omap_rfbi_cycleformat { OMAP_DSS_RFBI_CYCLEFORMAT_1_1 = 0, OMAP_DSS_RFBI_CYCLEFORMAT_2_1 = 1, @@ -89,11 +87,6 @@ enum omap_rfbi_parallelmode { OMAP_DSS_RFBI_PARALLELMODE_16 = 3, }; -enum update_cmd { - RFBI_CMD_UPDATE = 0, - RFBI_CMD_SYNC = 1, -}; - static int rfbi_convert_timings(struct rfbi_timings *t); static void rfbi_get_clk_info(u32 *clk_period, u32 *max_clk_div); @@ -114,20 +107,9 @@ static struct { struct omap_dss_device *dssdev[2]; - struct kfifo cmd_fifo; - spinlock_t cmd_lock; - struct completion cmd_done; - atomic_t cmd_fifo_full; - atomic_t cmd_pending; + struct semaphore bus_lock; } rfbi; -struct update_region { - u16 x; - u16 y; - u16 w; - u16 h; -}; - static inline void rfbi_write_reg(const struct rfbi_reg idx, u32 val) { __raw_writel(val, rfbi.base + idx.idx); @@ -146,9 +128,20 @@ static void rfbi_enable_clocks(bool enable) dss_clk_disable(DSS_CLK_ICK | DSS_CLK_FCK); } +void rfbi_bus_lock(void) +{ + down(&rfbi.bus_lock); +} +EXPORT_SYMBOL(rfbi_bus_lock); + +void rfbi_bus_unlock(void) +{ + up(&rfbi.bus_lock); +} +EXPORT_SYMBOL(rfbi_bus_unlock); + void omap_rfbi_write_command(const void *buf, u32 len) { - rfbi_enable_clocks(1); switch (rfbi.parallelmode) { case OMAP_DSS_RFBI_PARALLELMODE_8: { @@ -172,13 +165,11 @@ void omap_rfbi_write_command(const void *buf, u32 len) default: BUG(); } - rfbi_enable_clocks(0); } EXPORT_SYMBOL(omap_rfbi_write_command); void omap_rfbi_read_data(void *buf, u32 len) { - rfbi_enable_clocks(1); switch (rfbi.parallelmode) { case OMAP_DSS_RFBI_PARALLELMODE_8: { @@ -206,13 +197,11 @@ void omap_rfbi_read_data(void *buf, u32 len) default: BUG(); } - rfbi_enable_clocks(0); } EXPORT_SYMBOL(omap_rfbi_read_data); void omap_rfbi_write_data(const void *buf, u32 len) { - rfbi_enable_clocks(1); switch (rfbi.parallelmode) { case OMAP_DSS_RFBI_PARALLELMODE_8: { @@ -237,7 +226,6 @@ void omap_rfbi_write_data(const void *buf, u32 len) BUG(); } - rfbi_enable_clocks(0); } EXPORT_SYMBOL(omap_rfbi_write_data); @@ -249,8 +237,6 @@ void omap_rfbi_write_pixels(const void __iomem *buf, int scr_width, int horiz_offset = scr_width - w; int i; - rfbi_enable_clocks(1); - if (rfbi.datatype == OMAP_DSS_RFBI_DATATYPE_16 && rfbi.parallelmode == OMAP_DSS_RFBI_PARALLELMODE_8) { const u16 __iomem *pd = buf; @@ -295,12 +281,10 @@ void omap_rfbi_write_pixels(const void __iomem *buf, int scr_width, } else { BUG(); } - - rfbi_enable_clocks(0); } EXPORT_SYMBOL(omap_rfbi_write_pixels); -void rfbi_transfer_area(struct omap_dss_device *dssdev, u16 width, +static void rfbi_transfer_area(struct omap_dss_device *dssdev, u16 width, u16 height, void (*callback)(void *data), void *data) { u32 l; @@ -317,8 +301,6 @@ void rfbi_transfer_area(struct omap_dss_device *dssdev, u16 width, rfbi.framedone_callback = callback; rfbi.framedone_callback_data = data; - rfbi_enable_clocks(1); - rfbi_write_reg(RFBI_PIXEL_CNT, width * height); l = rfbi_read_reg(RFBI_CONTROL); @@ -337,15 +319,11 @@ static void framedone_callback(void *data, u32 mask) REG_FLD_MOD(RFBI_CONTROL, 0, 0, 0); - rfbi_enable_clocks(0); - callback = rfbi.framedone_callback; rfbi.framedone_callback = NULL; if (callback != NULL) callback(rfbi.framedone_callback_data); - - atomic_set(&rfbi.cmd_pending, 0); } #if 1 /* VERBOSE */ @@ -435,7 +413,7 @@ static int calc_extif_timings(struct rfbi_timings *t) } -void rfbi_set_timings(int rfbi_module, struct rfbi_timings *t) +static void rfbi_set_timings(int rfbi_module, struct rfbi_timings *t) { int r; @@ -447,7 +425,6 @@ void rfbi_set_timings(int rfbi_module, struct rfbi_timings *t) BUG_ON(!t->converted); - rfbi_enable_clocks(1); rfbi_write_reg(RFBI_ONOFF_TIME(rfbi_module), t->tim[0]); rfbi_write_reg(RFBI_CYCLE_TIME(rfbi_module), t->tim[1]); @@ -456,7 +433,6 @@ void rfbi_set_timings(int rfbi_module, struct rfbi_timings *t) (t->tim[2] ? 1 : 0), 4, 4); rfbi_print_timings(); - rfbi_enable_clocks(0); } static int ps_to_rfbi_ticks(int time, int div) @@ -472,59 +448,6 @@ static int ps_to_rfbi_ticks(int time, int div) return ret; } -#ifdef OMAP_RFBI_RATE_LIMIT -unsigned long rfbi_get_max_tx_rate(void) -{ - unsigned long l4_rate, dss1_rate; - int min_l4_ticks = 0; - int i; - - /* According to TI this can't be calculated so make the - * adjustments for a couple of known frequencies and warn for - * others. - */ - static const struct { - unsigned long l4_clk; /* HZ */ - unsigned long dss1_clk; /* HZ */ - unsigned long min_l4_ticks; - } ftab[] = { - { 55, 132, 7, }, /* 7.86 MPix/s */ - { 110, 110, 12, }, /* 9.16 MPix/s */ - { 110, 132, 10, }, /* 11 Mpix/s */ - { 120, 120, 10, }, /* 12 Mpix/s */ - { 133, 133, 10, }, /* 13.3 Mpix/s */ - }; - - l4_rate = rfbi.l4_khz / 1000; - dss1_rate = dss_clk_get_rate(DSS_CLK_FCK) / 1000000; - - for (i = 0; i < ARRAY_SIZE(ftab); i++) { - /* Use a window instead of an exact match, to account - * for different DPLL multiplier / divider pairs. - */ - if (abs(ftab[i].l4_clk - l4_rate) < 3 && - abs(ftab[i].dss1_clk - dss1_rate) < 3) { - min_l4_ticks = ftab[i].min_l4_ticks; - break; - } - } - if (i == ARRAY_SIZE(ftab)) { - /* Can't be sure, return anyway the maximum not - * rate-limited. This might cause a problem only for the - * tearing synchronisation. - */ - DSSERR("can't determine maximum RFBI transfer rate\n"); - return rfbi.l4_khz * 1000; - } - return rfbi.l4_khz * 1000 / min_l4_ticks; -} -#else -int rfbi_get_max_tx_rate(void) -{ - return rfbi.l4_khz * 1000; -} -#endif - static void rfbi_get_clk_info(u32 *clk_period, u32 *max_clk_div) { *clk_period = 1000000000 / rfbi.l4_khz; @@ -644,7 +567,6 @@ int omap_rfbi_setup_te(enum omap_rfbi_te_mode mode, DSSDBG("setup_te: mode %d hs %d vs %d hs_inv %d vs_inv %d\n", mode, hs, vs, hs_pol_inv, vs_pol_inv); - rfbi_enable_clocks(1); rfbi_write_reg(RFBI_HSYNC_WIDTH, hs); rfbi_write_reg(RFBI_VSYNC_WIDTH, vs); @@ -657,7 +579,6 @@ int omap_rfbi_setup_te(enum omap_rfbi_te_mode mode, l &= ~(1 << 20); else l |= 1 << 20; - rfbi_enable_clocks(0); return 0; } @@ -672,7 +593,6 @@ int omap_rfbi_enable_te(bool enable, unsigned line) if (line > (1 << 11) - 1) return -EINVAL; - rfbi_enable_clocks(1); l = rfbi_read_reg(RFBI_CONFIG(0)); l &= ~(0x3 << 2); if (enable) { @@ -682,50 +602,12 @@ int omap_rfbi_enable_te(bool enable, unsigned line) rfbi.te_enabled = 0; rfbi_write_reg(RFBI_CONFIG(0), l); rfbi_write_reg(RFBI_LINE_NUMBER, line); - rfbi_enable_clocks(0); return 0; } EXPORT_SYMBOL(omap_rfbi_enable_te); -#if 0 -static void rfbi_enable_config(int enable1, int enable2) -{ - u32 l; - int cs = 0; - - if (enable1) - cs |= 1<<0; - if (enable2) - cs |= 1<<1; - - rfbi_enable_clocks(1); - - l = rfbi_read_reg(RFBI_CONTROL); - - l = FLD_MOD(l, cs, 3, 2); - l = FLD_MOD(l, 0, 1, 1); - - rfbi_write_reg(RFBI_CONTROL, l); - - - l = rfbi_read_reg(RFBI_CONFIG(0)); - l = FLD_MOD(l, 0, 3, 2); /* TRIGGERMODE: ITE */ - /*l |= FLD_VAL(2, 8, 7); */ /* L4FORMAT, 2pix/L4 */ - /*l |= FLD_VAL(0, 8, 7); */ /* L4FORMAT, 1pix/L4 */ - - l = FLD_MOD(l, 0, 16, 16); /* A0POLARITY */ - l = FLD_MOD(l, 1, 20, 20); /* TE_VSYNC_POLARITY */ - l = FLD_MOD(l, 1, 21, 21); /* HSYNCPOLARITY */ - - l = FLD_MOD(l, OMAP_DSS_RFBI_PARALLELMODE_8, 1, 0); - rfbi_write_reg(RFBI_CONFIG(0), l); - - rfbi_enable_clocks(0); -} -#endif - -int rfbi_configure(int rfbi_module, int bpp, int lines) +static int rfbi_configure(int rfbi_module, int bpp, int lines) { u32 l; int cycle1 = 0, cycle2 = 0, cycle3 = 0; @@ -821,8 +703,6 @@ int rfbi_configure(int rfbi_module, int bpp, int lines) break; } - rfbi_enable_clocks(1); - REG_FLD_MOD(RFBI_CONTROL, 0, 3, 2); /* clear CS */ l = 0; @@ -856,11 +736,15 @@ int rfbi_configure(int rfbi_module, int bpp, int lines) DSSDBG("RFBI config: bpp %d, lines %d, cycles: 0x%x 0x%x 0x%x\n", bpp, lines, cycle1, cycle2, cycle3); - rfbi_enable_clocks(0); - return 0; } -EXPORT_SYMBOL(rfbi_configure); + +int omap_rfbi_configure(struct omap_dss_device *dssdev, int pixel_size, + int data_lines) +{ + return rfbi_configure(dssdev->phy.rfbi.channel, pixel_size, data_lines); +} +EXPORT_SYMBOL(omap_rfbi_configure); int omap_rfbi_prepare_update(struct omap_dss_device *dssdev, u16 *x, u16 *y, u16 *w, u16 *h) @@ -960,6 +844,8 @@ int omapdss_rfbi_display_enable(struct omap_dss_device *dssdev) { int r; + rfbi_enable_clocks(1); + r = omap_dss_start_device(dssdev); if (r) { DSSERR("failed to start device\n"); @@ -1002,6 +888,8 @@ void omapdss_rfbi_display_disable(struct omap_dss_device *dssdev) omap_dispc_unregister_isr(framedone_callback, NULL, DISPC_IRQ_FRAMEDONE); omap_dss_stop_device(dssdev); + + rfbi_enable_clocks(0); } EXPORT_SYMBOL(omapdss_rfbi_display_disable); @@ -1021,11 +909,7 @@ static int omap_rfbihw_probe(struct platform_device *pdev) rfbi.pdev = pdev; - spin_lock_init(&rfbi.cmd_lock); - - init_completion(&rfbi.cmd_done); - atomic_set(&rfbi.cmd_fifo_full, 0); - atomic_set(&rfbi.cmd_pending, 0); + sema_init(&rfbi.bus_lock, 1); rfbi_mem = platform_get_resource(rfbi.pdev, IORESOURCE_MEM, 0); if (!rfbi_mem) { |