mirror of
https://github.com/torvalds/linux.git
synced 2024-12-12 22:23:55 +00:00
bus: ti-sysc: Implement display subsystem reset quirk
The display subsystem (DSS) needs the child outputs disabled for reset. In order to prepare to probe DSS without legacy platform data, let's implement sysc_pre_reset_quirk_dss() similar to what we have for the platform data with omap_dss_reset(). Note that we cannot directly use the old omap_dss_reset() without platform data callbacks and updating omap_dss_reset() to understand struct device. And we will be dropping omap_dss_reset() anyways when all the SoCs are probing with device tree, so let's not mess with the legacy code at all. Cc: Jyri Sarha <jsarha@ti.com> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Cc: Tomi Valkeinen <tomi.valkeinen@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
parent
77dfece2e6
commit
7324a7a0d5
@ -1303,11 +1303,11 @@ static const struct sysc_revision_quirk sysc_revision_quirks[] = {
|
||||
SYSC_QUIRK("dcan", 0x48480000, 0x20, -ENODEV, -ENODEV, 0xa3170504, 0xffffffff,
|
||||
SYSC_QUIRK_CLKDM_NOAUTO),
|
||||
SYSC_QUIRK("dss", 0x4832a000, 0, 0x10, 0x14, 0x00000020, 0xffffffff,
|
||||
SYSC_QUIRK_OPT_CLKS_IN_RESET),
|
||||
SYSC_QUIRK_OPT_CLKS_IN_RESET | SYSC_MODULE_QUIRK_DSS_RESET),
|
||||
SYSC_QUIRK("dss", 0x58000000, 0, -ENODEV, 0x14, 0x00000040, 0xffffffff,
|
||||
SYSC_QUIRK_OPT_CLKS_IN_RESET),
|
||||
SYSC_QUIRK_OPT_CLKS_IN_RESET | SYSC_MODULE_QUIRK_DSS_RESET),
|
||||
SYSC_QUIRK("dss", 0x58000000, 0, -ENODEV, 0x14, 0x00000061, 0xffffffff,
|
||||
SYSC_QUIRK_OPT_CLKS_IN_RESET),
|
||||
SYSC_QUIRK_OPT_CLKS_IN_RESET | SYSC_MODULE_QUIRK_DSS_RESET),
|
||||
SYSC_QUIRK("dwc3", 0x48880000, 0, 0x10, -ENODEV, 0x500a0200, 0xffffffff,
|
||||
SYSC_QUIRK_CLKDM_NOAUTO),
|
||||
SYSC_QUIRK("dwc3", 0x488c0000, 0, 0x10, -ENODEV, 0x500a0200, 0xffffffff,
|
||||
@ -1468,6 +1468,128 @@ static void sysc_init_revision_quirks(struct sysc *ddata)
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* DSS needs dispc outputs disabled to reset modules. Returns mask of
|
||||
* enabled DSS interrupts. Eventually we may be able to do this on
|
||||
* dispc init rather than top-level DSS init.
|
||||
*/
|
||||
static u32 sysc_quirk_dispc(struct sysc *ddata, int dispc_offset,
|
||||
bool disable)
|
||||
{
|
||||
bool lcd_en, digit_en, lcd2_en = false, lcd3_en = false;
|
||||
const int lcd_en_mask = BIT(0), digit_en_mask = BIT(1);
|
||||
int manager_count;
|
||||
bool framedonetv_irq;
|
||||
u32 val, irq_mask = 0;
|
||||
|
||||
switch (sysc_soc->soc) {
|
||||
case SOC_2420 ... SOC_3630:
|
||||
manager_count = 2;
|
||||
framedonetv_irq = false;
|
||||
break;
|
||||
case SOC_4430 ... SOC_4470:
|
||||
manager_count = 3;
|
||||
break;
|
||||
case SOC_5430:
|
||||
case SOC_DRA7:
|
||||
manager_count = 4;
|
||||
break;
|
||||
case SOC_AM4:
|
||||
manager_count = 1;
|
||||
break;
|
||||
case SOC_UNKNOWN:
|
||||
default:
|
||||
return 0;
|
||||
};
|
||||
|
||||
/* Remap the whole module range to be able to reset dispc outputs */
|
||||
devm_iounmap(ddata->dev, ddata->module_va);
|
||||
ddata->module_va = devm_ioremap(ddata->dev,
|
||||
ddata->module_pa,
|
||||
ddata->module_size);
|
||||
if (!ddata->module_va)
|
||||
return -EIO;
|
||||
|
||||
/* DISP_CONTROL */
|
||||
val = sysc_read(ddata, dispc_offset + 0x40);
|
||||
lcd_en = val & lcd_en_mask;
|
||||
digit_en = val & digit_en_mask;
|
||||
if (lcd_en)
|
||||
irq_mask |= BIT(0); /* FRAMEDONE */
|
||||
if (digit_en) {
|
||||
if (framedonetv_irq)
|
||||
irq_mask |= BIT(24); /* FRAMEDONETV */
|
||||
else
|
||||
irq_mask |= BIT(2) | BIT(3); /* EVSYNC bits */
|
||||
}
|
||||
if (disable & (lcd_en | digit_en))
|
||||
sysc_write(ddata, dispc_offset + 0x40,
|
||||
val & ~(lcd_en_mask | digit_en_mask));
|
||||
|
||||
if (manager_count <= 2)
|
||||
return irq_mask;
|
||||
|
||||
/* DISPC_CONTROL2 */
|
||||
val = sysc_read(ddata, dispc_offset + 0x238);
|
||||
lcd2_en = val & lcd_en_mask;
|
||||
if (lcd2_en)
|
||||
irq_mask |= BIT(22); /* FRAMEDONE2 */
|
||||
if (disable && lcd2_en)
|
||||
sysc_write(ddata, dispc_offset + 0x238,
|
||||
val & ~lcd_en_mask);
|
||||
|
||||
if (manager_count <= 3)
|
||||
return irq_mask;
|
||||
|
||||
/* DISPC_CONTROL3 */
|
||||
val = sysc_read(ddata, dispc_offset + 0x848);
|
||||
lcd3_en = val & lcd_en_mask;
|
||||
if (lcd3_en)
|
||||
irq_mask |= BIT(30); /* FRAMEDONE3 */
|
||||
if (disable && lcd3_en)
|
||||
sysc_write(ddata, dispc_offset + 0x848,
|
||||
val & ~lcd_en_mask);
|
||||
|
||||
return irq_mask;
|
||||
}
|
||||
|
||||
/* DSS needs child outputs disabled and SDI registers cleared for reset */
|
||||
static void sysc_pre_reset_quirk_dss(struct sysc *ddata)
|
||||
{
|
||||
const int dispc_offset = 0x1000;
|
||||
int error;
|
||||
u32 irq_mask, val;
|
||||
|
||||
/* Get enabled outputs */
|
||||
irq_mask = sysc_quirk_dispc(ddata, dispc_offset, false);
|
||||
if (!irq_mask)
|
||||
return;
|
||||
|
||||
/* Clear IRQSTATUS */
|
||||
sysc_write(ddata, 0x1000 + 0x18, irq_mask);
|
||||
|
||||
/* Disable outputs */
|
||||
val = sysc_quirk_dispc(ddata, dispc_offset, true);
|
||||
|
||||
/* Poll IRQSTATUS */
|
||||
error = readl_poll_timeout(ddata->module_va + dispc_offset + 0x18,
|
||||
val, val != irq_mask, 100, 50);
|
||||
if (error)
|
||||
dev_warn(ddata->dev, "%s: timed out %08x !+ %08x\n",
|
||||
__func__, val, irq_mask);
|
||||
|
||||
if (sysc_soc->soc == SOC_3430) {
|
||||
/* Clear DSS_SDI_CONTROL */
|
||||
sysc_write(ddata, dispc_offset + 0x44, 0);
|
||||
|
||||
/* Clear DSS_PLL_CONTROL */
|
||||
sysc_write(ddata, dispc_offset + 0x48, 0);
|
||||
}
|
||||
|
||||
/* Clear DSS_CONTROL to switch DSS clock sources to PRCM if not */
|
||||
sysc_write(ddata, dispc_offset + 0x40, 0);
|
||||
}
|
||||
|
||||
/* 1-wire needs module's internal clocks enabled for reset */
|
||||
static void sysc_pre_reset_quirk_hdq1w(struct sysc *ddata)
|
||||
{
|
||||
@ -1606,6 +1728,9 @@ static void sysc_init_module_quirks(struct sysc *ddata)
|
||||
if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_AESS)
|
||||
ddata->module_enable_quirk = sysc_module_enable_quirk_aess;
|
||||
|
||||
if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_DSS_RESET)
|
||||
ddata->pre_reset_quirk = sysc_pre_reset_quirk_dss;
|
||||
|
||||
if (ddata->cfg.quirks & SYSC_MODULE_QUIRK_RTC_UNLOCK) {
|
||||
ddata->module_unlock_quirk = sysc_module_unlock_quirk_rtc;
|
||||
ddata->module_lock_quirk = sysc_module_lock_quirk_rtc;
|
||||
|
@ -49,6 +49,7 @@ struct sysc_regbits {
|
||||
s8 emufree_shift;
|
||||
};
|
||||
|
||||
#define SYSC_MODULE_QUIRK_DSS_RESET BIT(23)
|
||||
#define SYSC_MODULE_QUIRK_RTC_UNLOCK BIT(22)
|
||||
#define SYSC_QUIRK_CLKDM_NOAUTO BIT(21)
|
||||
#define SYSC_QUIRK_FORCE_MSTANDBY BIT(20)
|
||||
|
Loading…
Reference in New Issue
Block a user