diff options
| author | Robby Cai <R63905@freescale.com> | 2012-07-06 17:51:13 +0800 |
|---|---|---|
| committer | Terry Lv <r65388@freescale.com> | 2012-07-25 13:10:36 +0800 |
| commit | f86a8329318fd6374c30a8a340ac8b81db100dfc (patch) | |
| tree | 5d17dc57c96c651d340b177d08c8b4d8f5c7dfb4 /arch/arm/mach-mx6/pm.c | |
| parent | 473ad2b1fa2c1441db562a58859be5a7eb18ce93 (diff) | |
ENGR00216010-1: gpc: Add missing display_pup_req config after system resumes
There's only DISPLAY power down request setting before system suspends,
but without the paired DISPLAY power up request setting after resume.
This will cause ePxP/EPDC/SPDC module nonfunctional because the modules
will be powered down once pdn_req is asserted but not powered up again.
With this patch, ePxP/EPDC/SPDC survived (need reinitialize each, however)
on resume.
Signed-off-by: Robby Cai <R63905@freescale.com>
Diffstat (limited to 'arch/arm/mach-mx6/pm.c')
| -rw-r--r-- | arch/arm/mach-mx6/pm.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/arch/arm/mach-mx6/pm.c b/arch/arm/mach-mx6/pm.c index 4217fbef9b56..50df5714b2d8 100644 --- a/arch/arm/mach-mx6/pm.c +++ b/arch/arm/mach-mx6/pm.c @@ -50,6 +50,9 @@ #define GPC_ISR4_OFFSET 0x24 #define GPC_CNTR_OFFSET 0x0 #define GPC_PGC_DISP_PGCR_OFFSET 0x240 +#define GPC_PGC_DISP_PUPSCR_OFFSET 0x244 +#define GPC_PGC_DISP_PDNSCR_OFFSET 0x248 +#define GPC_PGC_DISP_SR_OFFSET 0x24c #define GPC_PGC_GPU_PGCR_OFFSET 0x260 #define GPC_PGC_CPU_PDN_OFFSET 0x2a0 #define GPC_PGC_CPU_PUPSCR_OFFSET 0x2a4 @@ -226,7 +229,25 @@ static void gpu_power_up(void) udelay(10); } +static void disp_power_down(void) +{ + if (cpu_is_mx6sl()) { + __raw_writel(0xFFFFFFFF, gpc_base + GPC_PGC_DISP_PUPSCR_OFFSET); + __raw_writel(0xFFFFFFFF, gpc_base + GPC_PGC_DISP_PDNSCR_OFFSET); + + __raw_writel(0x1, gpc_base + GPC_PGC_DISP_PGCR_OFFSET); + __raw_writel(0x10, gpc_base + GPC_CNTR_OFFSET); + } +} +static void disp_power_up(void) +{ + if (cpu_is_mx6sl()) { + __raw_writel(0x0, gpc_base + GPC_PGC_DISP_PGCR_OFFSET); + __raw_writel(0x20, gpc_base + GPC_CNTR_OFFSET); + __raw_writel(0x1, gpc_base + GPC_PGC_DISP_SR_OFFSET); + } +} static void mx6_suspend_store(void) { @@ -324,6 +345,7 @@ static int mx6_suspend_enter(suspend_state_t state) switch (state) { case PM_SUSPEND_MEM: gpu_power_down(); + disp_power_down(); usb_power_down_handler(); mxc_cpu_lp_set(ARM_POWER_OFF); break; @@ -358,6 +380,7 @@ static int mx6_suspend_enter(suspend_state_t state) restore_gic_dist_state(0, &gds); restore_gic_cpu_state(0, &gcs); usb_power_up_handler(); + disp_power_up(); gpu_power_up(); } |