| Message ID | 20190213214052.2427-3-linux.amoon@gmail.com (mailing list archive) |
|---|---|
| State | RFC |
| Headers | show |
| Series | Add support for Suspend and Resume for Exynos4412 on | expand |
On Wed, 13 Feb 2019 at 22:41, Anand Moon <linux.amoon@gmail.com> wrote: > > This patch adds configration for PMU (Power Management Unit) state > tuning for exynos4412 SoC in order to enter low-power mode during > suspend power modes and help resume from suspend state. The U3 and Trats2 already enter STOP/S2R so please describe what exactly you change. > Fixes: bfce552d0b1 ("drivers: soc: Add support for Exynos PMU driver") How it fixes it? What was broken in that commit? > Cc: Marek Szyprowski <m.szyprowski@samsung.com> > Cc: Krzysztof Kozlowski <krzk@kernel.org> > Cc: Chanwoo Choi <cw00.choi@samsung.com> > Signed-off-by: Anand Moon <linux.amoon@gmail.com> > --- > > Changes from previous patch. > New patch to this series to support suspend and resume state > > Changes have been tested on microSD card but fails to resume on cMMC. > It need to be investigated and more debuging > --- > drivers/soc/samsung/exynos4-pmu.c | 83 +++++++++++++++++++++ > include/linux/soc/samsung/exynos-regs-pmu.h | 21 ++++++ > 2 files changed, 104 insertions(+) > > diff --git a/drivers/soc/samsung/exynos4-pmu.c b/drivers/soc/samsung/exynos4-pmu.c > index a7cdbf1aac0c..d261a0d2371e 100644 > --- a/drivers/soc/samsung/exynos4-pmu.c > +++ b/drivers/soc/samsung/exynos4-pmu.c > @@ -200,10 +200,93 @@ static const struct exynos_pmu_conf exynos4412_pmu_config[] = { > { PMU_TABLE_END,}, > }; > > +static unsigned int const exynos4412_list_feed[] = { > + EXYNOS4_ARM_CORE0_OPTION, > + EXYNOS4_ARM_CORE1_OPTION, > + EXYNOS4_ARM_CORE2_OPTION, > + EXYNOS4_ARM_CORE3_OPTION, > + EXYNOS4_ARM_COMMON_OPTION, > + EXYNOS4_CAM_OPTION, > + EXYNOS4_TV_OPTION, > + EXYNOS4_MFC_OPTION, > + EXYNOS4_G3D_OPTION, > + EXYNOS4_LCD0_OPTION, > + EXYNOS4_ISP_OPTION, > + EXYNOS4_MAUDIO_OPTION, > + EXYNOS4_GPS_OPTION, > + EXYNOS4_GPS_ALIVE_OPTION, > +}; > + > +static void exynos4412_pmu_central_seq(bool enable) You name the argument as "enable" but during initialization and system running you pass here false. It confuses me. What do you enable here? > +{ > + unsigned int value; > + > + value = pmu_raw_readl(S5P_CENTRAL_SEQ_CONFIGURATION); > + if (enable) > + value &= ~S5P_CENTRAL_LOWPWR_CFG; > + else > + value |= S5P_CENTRAL_LOWPWR_CFG; > + pmu_raw_writel(value, S5P_CENTRAL_SEQ_CONFIGURATION); You duplicate exynos_pm_central_suspend() without removing the original code. > + > + value = pmu_raw_readl(S5P_CENTRAL_SEQ_CONFIGURATION_COREBLK); > + if (enable) > + value &= ~S5P_CENTRAL_LOWPWR_CFG; > + else > + value |= S5P_CENTRAL_LOWPWR_CFG; As manual says - set this register only if you disable C2C. Our entire low power configuration for STOP mode is for C2C enabled case so you add inconsistent configuration. > + pmu_raw_writel(value, S5P_CENTRAL_SEQ_CONFIGURATION_COREBLK); > +} > + > +static void exynos4412_pmu_init(void) > +{ > + unsigned int value; > + int i; > + > + /* Enable USE_STANDBY_WFI for all CORE */ > + pmu_raw_writel(S5P_USE_STANDBY_WFI_ALL, S5P_CENTRAL_SEQ_OPTION); This does not look related to improving suspend... it looks unrelated. > + > + /* Decides whether to use retention capability */ > + value = pmu_raw_readl(S5P_ARM_L2_0_OPTION); > + value &= ~EXYNOS_L2_USE_RETENTION; > + pmu_raw_writel(value, S5P_ARM_L2_0_OPTION); > + > + value = pmu_raw_readl(S5P_ARM_L2_1_OPTION); > + value &= ~EXYNOS_L2_USE_RETENTION; > + pmu_raw_writel(value, S5P_ARM_L2_1_OPTION); > + > + /* Set PSHOLD port for output high */ > + value = pmu_raw_readl(S5P_PS_HOLD_CONTROL); > + value |= S5P_PS_HOLD_OUTPUT_HIGH; > + pmu_raw_writel(value, S5P_PS_HOLD_CONTROL); > + > + /* Enable signal for PSHOLD port */ > + value = pmu_raw_readl(S5P_PS_HOLD_CONTROL); > + value |= S5P_PS_HOLD_EN; > + pmu_raw_writel(value, S5P_PS_HOLD_CONTROL); > + The same - not related. > + /* Enable only SC_FEEDBACK */ > + for (i = 0; i < ARRAY_SIZE(exynos4412_list_feed); i++) { > + value = pmu_raw_readl(exynos4412_list_feed[i]); > + value &= ~(EXYNOS_USE_SC_COUNTER); > + value |= EXYNOS_USE_SC_FEEDBACK; > + pmu_raw_writel(value, exynos4412_list_feed[i]); Why do you prefer to use feedback instead of counter? > + } > + > + exynos4412_pmu_central_seq(false); > + > + pr_info("EXYNOS4x12 PMU Initialize\n"); > +} > + > +static void exynos4412_powerdown_conf(enum sys_powerdown mode) > +{ > + exynos4412_pmu_central_seq(true); > +} > + > const struct exynos_pmu_data exynos4210_pmu_data = { > .pmu_config = exynos4210_pmu_config, > }; > > const struct exynos_pmu_data exynos4412_pmu_data = { > .pmu_config = exynos4412_pmu_config, > + .pmu_init = exynos4412_pmu_init, > + .powerdown_conf = exynos4412_powerdown_conf, > }; > diff --git a/include/linux/soc/samsung/exynos-regs-pmu.h b/include/linux/soc/samsung/exynos-regs-pmu.h > index 5addaf5ccbce..6beed3e669d2 100644 > --- a/include/linux/soc/samsung/exynos-regs-pmu.h > +++ b/include/linux/soc/samsung/exynos-regs-pmu.h > @@ -16,6 +16,8 @@ > > #define S5P_CENTRAL_SEQ_CONFIGURATION 0x0200 > > +#define S5P_CENTRAL_SEQ_CONFIGURATION_COREBLK 0x0240 > + > #define S5P_CENTRAL_LOWPWR_CFG (1 << 16) > > #define S5P_CENTRAL_SEQ_OPTION 0x0208 > @@ -347,6 +349,25 @@ > #define EXYNOS3_OPTION_USE_SC_FEEDBACK (1 << 1) > #define EXYNOS3_OPTION_SKIP_DEACTIVATE_ACEACP_IN_PWDN (1 << 7) > > +/* EXYNOS4 */ > +#define EXYNOS_USE_SC_FEEDBACK BIT(1) > +#define EXYNOS_USE_SC_COUNTER BIT(0) Instead of adding third set of these defines, I would prefer to cleanup existing and squash all into one (exynos3 and exynos5). > + > +#define EXYNOS4_ARM_CORE0_OPTION 0x2008 > +#define EXYNOS4_ARM_CORE1_OPTION 0x2088 > +#define EXYNOS4_ARM_CORE2_OPTION 0x2108 > +#define EXYNOS4_ARM_CORE3_OPTION 0x2188 The same. > +#define EXYNOS4_ARM_COMMON_OPTION 0x2408 > +#define EXYNOS4_CAM_OPTION 0x3C08 > +#define EXYNOS4_TV_OPTION 0x3C28 > +#define EXYNOS4_MFC_OPTION 0x3C48 > +#define EXYNOS4_G3D_OPTION 0x3C68 > +#define EXYNOS4_LCD0_OPTION 0x3C88 > +#define EXYNOS4_ISP_OPTION 0x3CA8 > +#define EXYNOS4_MAUDIO_OPTION 0x3CC8 > +#define EXYNOS4_GPS_OPTION 0x3CE8 > +#define EXYNOS4_GPS_ALIVE_OPTION 0x3D08 Do you need them? I think the are already defined and used by Exynos3. Best regards, Krzysztof > + > /* For EXYNOS5 */ > > #define EXYNOS5_AUTO_WDTRESET_DISABLE 0x0408 > -- > 2.20.1 >
Hi Krzysztof, Thanks for your review comments. On Thu, 14 Feb 2019 at 18:29, Krzysztof Kozlowski <krzk@kernel.org> wrote: > > On Wed, 13 Feb 2019 at 22:41, Anand Moon <linux.amoon@gmail.com> wrote: > > > > This patch adds configration for PMU (Power Management Unit) state > > tuning for exynos4412 SoC in order to enter low-power mode during > > suspend power modes and help resume from suspend state. > > The U3 and Trats2 already enter STOP/S2R so please describe what > exactly you change. > > > Fixes: bfce552d0b1 ("drivers: soc: Add support for Exynos PMU driver") > > How it fixes it? What was broken in that commit? * I was not aware on their is common framework for suspend and resume other than setting this here.I only look in to some the other exynos pmu architecture and referring 3.10.x kernel to model my changes.* > > > Cc: Marek Szyprowski <m.szyprowski@samsung.com> > > Cc: Krzysztof Kozlowski <krzk@kernel.org> > > Cc: Chanwoo Choi <cw00.choi@samsung.com> > > Signed-off-by: Anand Moon <linux.amoon@gmail.com> > > --- > > > > Changes from previous patch. > > New patch to this series to support suspend and resume state > > > > Changes have been tested on microSD card but fails to resume on cMMC. > > It need to be investigated and more debuging > > --- > > drivers/soc/samsung/exynos4-pmu.c | 83 +++++++++++++++++++++ > > include/linux/soc/samsung/exynos-regs-pmu.h | 21 ++++++ > > 2 files changed, 104 insertions(+) > > > > diff --git a/drivers/soc/samsung/exynos4-pmu.c b/drivers/soc/samsung/exynos4-pmu.c > > index a7cdbf1aac0c..d261a0d2371e 100644 > > --- a/drivers/soc/samsung/exynos4-pmu.c > > +++ b/drivers/soc/samsung/exynos4-pmu.c > > @@ -200,10 +200,93 @@ static const struct exynos_pmu_conf exynos4412_pmu_config[] = { > > { PMU_TABLE_END,}, > > }; > > > > +static unsigned int const exynos4412_list_feed[] = { > > + EXYNOS4_ARM_CORE0_OPTION, > > + EXYNOS4_ARM_CORE1_OPTION, > > + EXYNOS4_ARM_CORE2_OPTION, > > + EXYNOS4_ARM_CORE3_OPTION, > > + EXYNOS4_ARM_COMMON_OPTION, > > + EXYNOS4_CAM_OPTION, > > + EXYNOS4_TV_OPTION, > > + EXYNOS4_MFC_OPTION, > > + EXYNOS4_G3D_OPTION, > > + EXYNOS4_LCD0_OPTION, > > + EXYNOS4_ISP_OPTION, > > + EXYNOS4_MAUDIO_OPTION, > > + EXYNOS4_GPS_OPTION, > > + EXYNOS4_GPS_ALIVE_OPTION, > > +}; > > + > > +static void exynos4412_pmu_central_seq(bool enable) > > You name the argument as "enable" but during initialization and > system running you pass here false. It confuses me. What do you enable > here? > Yep your are correct need to drop this function as already done in common frame work. > > +{ > > + unsigned int value; > > + > > + value = pmu_raw_readl(S5P_CENTRAL_SEQ_CONFIGURATION); > > + if (enable) > > + value &= ~S5P_CENTRAL_LOWPWR_CFG; > > + else > > + value |= S5P_CENTRAL_LOWPWR_CFG; > > + pmu_raw_writel(value, S5P_CENTRAL_SEQ_CONFIGURATION); > > You duplicate exynos_pm_central_suspend() without removing the original code. > > > + > > + value = pmu_raw_readl(S5P_CENTRAL_SEQ_CONFIGURATION_COREBLK); > > + if (enable) > > + value &= ~S5P_CENTRAL_LOWPWR_CFG; > > + else > > + value |= S5P_CENTRAL_LOWPWR_CFG; > > As manual says - set this register only if you disable C2C. Our entire > low power configuration for STOP mode is for C2C enabled case so you > add inconsistent configuration. Ok Sorry I overlook this code change. Enable system power down. Set only CENTRAL_SEQ_CONFIGURATION register if you disable C2C. Set both CENTRAL_SEQ_CONFIGURATION and CENTRAL_SEQ_CONFIGURATION_COREBLK registers if you enable C2C. > > + pmu_raw_writel(value, S5P_CENTRAL_SEQ_CONFIGURATION_COREBLK); > > +} > > + > > +static void exynos4412_pmu_init(void) > > +{ > > + unsigned int value; > > + int i; > > + > > + /* Enable USE_STANDBY_WFI for all CORE */ > > + pmu_raw_writel(S5P_USE_STANDBY_WFI_ALL, S5P_CENTRAL_SEQ_OPTION); > > This does not look related to improving suspend... it looks unrelated. > Ok yes your are correct all ready done in comment frame work. "Execute WFI/WFE for all CPU cores. As soon as all the CPU cores in Exynos 4412 SCP enter STANDBY mode" > > + > > + /* Decides whether to use retention capability */ > > + value = pmu_raw_readl(S5P_ARM_L2_0_OPTION); > > + value &= ~EXYNOS_L2_USE_RETENTION; > > + pmu_raw_writel(value, S5P_ARM_L2_0_OPTION); > > + > > + value = pmu_raw_readl(S5P_ARM_L2_1_OPTION); > > + value &= ~EXYNOS_L2_USE_RETENTION; > > + pmu_raw_writel(value, S5P_ARM_L2_1_OPTION); > > + > > + /* Set PSHOLD port for output high */ > > + value = pmu_raw_readl(S5P_PS_HOLD_CONTROL); > > + value |= S5P_PS_HOLD_OUTPUT_HIGH; > > + pmu_raw_writel(value, S5P_PS_HOLD_CONTROL); > > + > > + /* Enable signal for PSHOLD port */ > > + value = pmu_raw_readl(S5P_PS_HOLD_CONTROL); > > + value |= S5P_PS_HOLD_EN; > > + pmu_raw_writel(value, S5P_PS_HOLD_CONTROL); > > + > > The same - not related. PS_HOLD_CONTROL need to be set under following set Hardware reset Reset Watchdog timer reset Keep its value Software reset Keep its value Warm reset Keep its value Wakeup reset Keep its value > > > + /* Enable only SC_FEEDBACK */ > > + for (i = 0; i < ARRAY_SIZE(exynos4412_list_feed); i++) { > > + value = pmu_raw_readl(exynos4412_list_feed[i]); > > + value &= ~(EXYNOS_USE_SC_COUNTER); > > + value |= EXYNOS_USE_SC_FEEDBACK; > > + pmu_raw_writel(value, exynos4412_list_feed[i]); > > Why do you prefer to use feedback instead of counter? > Their is a note below if we use this setting. NOTE: Either one of USE_SC_FEEDBACK and USE_SC_COUNTER should be activated. > > + } > > + > > + exynos4412_pmu_central_seq(false); > > + > > + pr_info("EXYNOS4x12 PMU Initialize\n"); > > +} > > + > > +static void exynos4412_powerdown_conf(enum sys_powerdown mode) > > +{ > > + exynos4412_pmu_central_seq(true); > > +} > > + > > const struct exynos_pmu_data exynos4210_pmu_data = { > > .pmu_config = exynos4210_pmu_config, > > }; > > > > const struct exynos_pmu_data exynos4412_pmu_data = { > > .pmu_config = exynos4412_pmu_config, > > + .pmu_init = exynos4412_pmu_init, > > + .powerdown_conf = exynos4412_powerdown_conf, > > }; > > diff --git a/include/linux/soc/samsung/exynos-regs-pmu.h b/include/linux/soc/samsung/exynos-regs-pmu.h > > index 5addaf5ccbce..6beed3e669d2 100644 > > --- a/include/linux/soc/samsung/exynos-regs-pmu.h > > +++ b/include/linux/soc/samsung/exynos-regs-pmu.h > > @@ -16,6 +16,8 @@ > > > > #define S5P_CENTRAL_SEQ_CONFIGURATION 0x0200 > > > > +#define S5P_CENTRAL_SEQ_CONFIGURATION_COREBLK 0x0240 > > + > > #define S5P_CENTRAL_LOWPWR_CFG (1 << 16) > > > > #define S5P_CENTRAL_SEQ_OPTION 0x0208 > > @@ -347,6 +349,25 @@ > > #define EXYNOS3_OPTION_USE_SC_FEEDBACK (1 << 1) > > #define EXYNOS3_OPTION_SKIP_DEACTIVATE_ACEACP_IN_PWDN (1 << 7) > > > > +/* EXYNOS4 */ > > +#define EXYNOS_USE_SC_FEEDBACK BIT(1) > > +#define EXYNOS_USE_SC_COUNTER BIT(0) > > Instead of adding third set of these defines, I would prefer to > cleanup existing and squash all into one (exynos3 and exynos5). > Ok I will try to do this changes or use the existing one. > > + > > +#define EXYNOS4_ARM_CORE0_OPTION 0x2008 > > +#define EXYNOS4_ARM_CORE1_OPTION 0x2088 > > +#define EXYNOS4_ARM_CORE2_OPTION 0x2108 > > +#define EXYNOS4_ARM_CORE3_OPTION 0x2188 > > The same. > > > +#define EXYNOS4_ARM_COMMON_OPTION 0x2408 > > +#define EXYNOS4_CAM_OPTION 0x3C08 > > +#define EXYNOS4_TV_OPTION 0x3C28 > > +#define EXYNOS4_MFC_OPTION 0x3C48 > > +#define EXYNOS4_G3D_OPTION 0x3C68 > > +#define EXYNOS4_LCD0_OPTION 0x3C88 > > +#define EXYNOS4_ISP_OPTION 0x3CA8 > > +#define EXYNOS4_MAUDIO_OPTION 0x3CC8 > > +#define EXYNOS4_GPS_OPTION 0x3CE8 > > +#define EXYNOS4_GPS_ALIVE_OPTION 0x3D08 > > Do you need them? I think the are already defined and used by Exynos3. Ok I will uses these form Exynos3. > > Best regards, > Krzysztof > > > + > > /* For EXYNOS5 */ > > > > #define EXYNOS5_AUTO_WDTRESET_DISABLE 0x0408 > > -- > > 2.20.1 > > Best Regards -Anand
On Thu, 14 Feb 2019 at 19:37, Anand Moon <linux.amoon@gmail.com> wrote: > > Hi Krzysztof, > > Thanks for your review comments. > > On Thu, 14 Feb 2019 at 18:29, Krzysztof Kozlowski <krzk@kernel.org> wrote: > > > > On Wed, 13 Feb 2019 at 22:41, Anand Moon <linux.amoon@gmail.com> wrote: > > > > > > This patch adds configration for PMU (Power Management Unit) state > > > tuning for exynos4412 SoC in order to enter low-power mode during > > > suspend power modes and help resume from suspend state. > > > > The U3 and Trats2 already enter STOP/S2R so please describe what > > exactly you change. > > > > > Fixes: bfce552d0b1 ("drivers: soc: Add support for Exynos PMU driver") > > > > How it fixes it? What was broken in that commit? > > * I was not aware on their is common framework for suspend and resume > other than setting this here.I only look in to some the other exynos > pmu architecture > and referring 3.10.x kernel to model my changes.* Suspend in general should be working already so adding this code just because is not a valid reason. Please specify what is not working first. > > > > > Cc: Marek Szyprowski <m.szyprowski@samsung.com> > > > Cc: Krzysztof Kozlowski <krzk@kernel.org> > > > Cc: Chanwoo Choi <cw00.choi@samsung.com> > > > Signed-off-by: Anand Moon <linux.amoon@gmail.com> > > > --- > > > > > > Changes from previous patch. > > > New patch to this series to support suspend and resume state > > > > > > Changes have been tested on microSD card but fails to resume on cMMC. > > > It need to be investigated and more debuging > > > --- > > > drivers/soc/samsung/exynos4-pmu.c | 83 +++++++++++++++++++++ > > > include/linux/soc/samsung/exynos-regs-pmu.h | 21 ++++++ > > > 2 files changed, 104 insertions(+) > > > > > > diff --git a/drivers/soc/samsung/exynos4-pmu.c b/drivers/soc/samsung/exynos4-pmu.c > > > index a7cdbf1aac0c..d261a0d2371e 100644 > > > --- a/drivers/soc/samsung/exynos4-pmu.c > > > +++ b/drivers/soc/samsung/exynos4-pmu.c > > > @@ -200,10 +200,93 @@ static const struct exynos_pmu_conf exynos4412_pmu_config[] = { > > > { PMU_TABLE_END,}, > > > }; > > > > > > +static unsigned int const exynos4412_list_feed[] = { > > > + EXYNOS4_ARM_CORE0_OPTION, > > > + EXYNOS4_ARM_CORE1_OPTION, > > > + EXYNOS4_ARM_CORE2_OPTION, > > > + EXYNOS4_ARM_CORE3_OPTION, > > > + EXYNOS4_ARM_COMMON_OPTION, > > > + EXYNOS4_CAM_OPTION, > > > + EXYNOS4_TV_OPTION, > > > + EXYNOS4_MFC_OPTION, > > > + EXYNOS4_G3D_OPTION, > > > + EXYNOS4_LCD0_OPTION, > > > + EXYNOS4_ISP_OPTION, > > > + EXYNOS4_MAUDIO_OPTION, > > > + EXYNOS4_GPS_OPTION, > > > + EXYNOS4_GPS_ALIVE_OPTION, > > > +}; > > > + > > > +static void exynos4412_pmu_central_seq(bool enable) > > > > You name the argument as "enable" but during initialization and > > system running you pass here false. It confuses me. What do you enable > > here? > > > > Yep your are correct need to drop this function as already done in > common frame work. > > > > +{ > > > + unsigned int value; > > > + > > > + value = pmu_raw_readl(S5P_CENTRAL_SEQ_CONFIGURATION); > > > + if (enable) > > > + value &= ~S5P_CENTRAL_LOWPWR_CFG; > > > + else > > > + value |= S5P_CENTRAL_LOWPWR_CFG; > > > + pmu_raw_writel(value, S5P_CENTRAL_SEQ_CONFIGURATION); > > > > You duplicate exynos_pm_central_suspend() without removing the original code. > > > > > + > > > + value = pmu_raw_readl(S5P_CENTRAL_SEQ_CONFIGURATION_COREBLK); > > > + if (enable) > > > + value &= ~S5P_CENTRAL_LOWPWR_CFG; > > > + else > > > + value |= S5P_CENTRAL_LOWPWR_CFG; > > > > As manual says - set this register only if you disable C2C. Our entire > > low power configuration for STOP mode is for C2C enabled case so you > > add inconsistent configuration. > > Ok Sorry I overlook this code change. > > Enable system power down. Set only CENTRAL_SEQ_CONFIGURATION register > if you disable C2C. > Set both CENTRAL_SEQ_CONFIGURATION and > CENTRAL_SEQ_CONFIGURATION_COREBLK registers if you enable C2C. > > > > + pmu_raw_writel(value, S5P_CENTRAL_SEQ_CONFIGURATION_COREBLK); > > > +} > > > + > > > +static void exynos4412_pmu_init(void) > > > +{ > > > + unsigned int value; > > > + int i; > > > + > > > + /* Enable USE_STANDBY_WFI for all CORE */ > > > + pmu_raw_writel(S5P_USE_STANDBY_WFI_ALL, S5P_CENTRAL_SEQ_OPTION); > > > > This does not look related to improving suspend... it looks unrelated. > > > > Ok yes your are correct all ready done in comment frame work. > > "Execute WFI/WFE for all CPU cores. As soon as all the CPU cores in > Exynos 4412 SCP enter STANDBY mode" > > > + > > > + /* Decides whether to use retention capability */ > > > + value = pmu_raw_readl(S5P_ARM_L2_0_OPTION); > > > + value &= ~EXYNOS_L2_USE_RETENTION; > > > + pmu_raw_writel(value, S5P_ARM_L2_0_OPTION); > > > + > > > + value = pmu_raw_readl(S5P_ARM_L2_1_OPTION); > > > + value &= ~EXYNOS_L2_USE_RETENTION; > > > + pmu_raw_writel(value, S5P_ARM_L2_1_OPTION); > > > + > > > + /* Set PSHOLD port for output high */ > > > + value = pmu_raw_readl(S5P_PS_HOLD_CONTROL); > > > + value |= S5P_PS_HOLD_OUTPUT_HIGH; > > > + pmu_raw_writel(value, S5P_PS_HOLD_CONTROL); > > > + > > > + /* Enable signal for PSHOLD port */ > > > + value = pmu_raw_readl(S5P_PS_HOLD_CONTROL); > > > + value |= S5P_PS_HOLD_EN; > > > + pmu_raw_writel(value, S5P_PS_HOLD_CONTROL); > > > + > > > > The same - not related. > > PS_HOLD_CONTROL need to be set under following set > Hardware reset Reset > Watchdog timer reset Keep its value > Software reset Keep its value > Warm reset Keep its value > Wakeup reset Keep its value Which is not related to suspend... > > > > > > + /* Enable only SC_FEEDBACK */ > > > + for (i = 0; i < ARRAY_SIZE(exynos4412_list_feed); i++) { > > > + value = pmu_raw_readl(exynos4412_list_feed[i]); > > > + value &= ~(EXYNOS_USE_SC_COUNTER); > > > + value |= EXYNOS_USE_SC_FEEDBACK; > > > + pmu_raw_writel(value, exynos4412_list_feed[i]); > > > > Why do you prefer to use feedback instead of counter? > > > > Their is a note below if we use this setting. > NOTE: Either one of USE_SC_FEEDBACK and USE_SC_COUNTER should be activated. This is not the answer to my question at all. Best regards, Krzysztof
Hi Krzysztof, On Fri, 15 Feb 2019 at 13:03, Krzysztof Kozlowski <krzk@kernel.org> wrote: > > On Thu, 14 Feb 2019 at 19:37, Anand Moon <linux.amoon@gmail.com> wrote: > > > > Hi Krzysztof, > > > > Thanks for your review comments. > > > > On Thu, 14 Feb 2019 at 18:29, Krzysztof Kozlowski <krzk@kernel.org> wrote: > > > > > > On Wed, 13 Feb 2019 at 22:41, Anand Moon <linux.amoon@gmail.com> wrote: > > > > > > > > This patch adds configration for PMU (Power Management Unit) state > > > > tuning for exynos4412 SoC in order to enter low-power mode during > > > > suspend power modes and help resume from suspend state. > > > > > > The U3 and Trats2 already enter STOP/S2R so please describe what > > > exactly you change. > > > > > > > Fixes: bfce552d0b1 ("drivers: soc: Add support for Exynos PMU driver") > > > > > > How it fixes it? What was broken in that commit? > > > > * I was not aware on their is common framework for suspend and resume > > other than setting this here.I only look in to some the other exynos > > pmu architecture > > and referring 3.10.x kernel to model my changes.* > > Suspend in general should be working already so adding this code just > because is not a valid reason. Please specify what is not working > first. > Please accept *my apology* for not studying the code changes required. Sorry for wasting your precious time in review. My only intention with this patch was to correctly initialize some PMU parameters. which might be wrong. so lets drop this. > > > > > > > Cc: Marek Szyprowski <m.szyprowski@samsung.com> > > > > Cc: Krzysztof Kozlowski <krzk@kernel.org> > > > > Cc: Chanwoo Choi <cw00.choi@samsung.com> > > > > Signed-off-by: Anand Moon <linux.amoon@gmail.com> > > > > --- > > > > > > > > Changes from previous patch. > > > > New patch to this series to support suspend and resume state > > > > > > > > Changes have been tested on microSD card but fails to resume on cMMC. > > > > It need to be investigated and more debuging > > > > --- > > > > drivers/soc/samsung/exynos4-pmu.c | 83 +++++++++++++++++++++ > > > > include/linux/soc/samsung/exynos-regs-pmu.h | 21 ++++++ > > > > 2 files changed, 104 insertions(+) > > > > > > > > diff --git a/drivers/soc/samsung/exynos4-pmu.c b/drivers/soc/samsung/exynos4-pmu.c > > > > index a7cdbf1aac0c..d261a0d2371e 100644 > > > > --- a/drivers/soc/samsung/exynos4-pmu.c > > > > +++ b/drivers/soc/samsung/exynos4-pmu.c > > > > @@ -200,10 +200,93 @@ static const struct exynos_pmu_conf exynos4412_pmu_config[] = { > > > > { PMU_TABLE_END,}, > > > > }; > > > > > > > > +static unsigned int const exynos4412_list_feed[] = { > > > > + EXYNOS4_ARM_CORE0_OPTION, > > > > + EXYNOS4_ARM_CORE1_OPTION, > > > > + EXYNOS4_ARM_CORE2_OPTION, > > > > + EXYNOS4_ARM_CORE3_OPTION, > > > > + EXYNOS4_ARM_COMMON_OPTION, > > > > + EXYNOS4_CAM_OPTION, > > > > + EXYNOS4_TV_OPTION, > > > > + EXYNOS4_MFC_OPTION, > > > > + EXYNOS4_G3D_OPTION, > > > > + EXYNOS4_LCD0_OPTION, > > > > + EXYNOS4_ISP_OPTION, > > > > + EXYNOS4_MAUDIO_OPTION, > > > > + EXYNOS4_GPS_OPTION, > > > > + EXYNOS4_GPS_ALIVE_OPTION, > > > > +}; > > > > + > > > > +static void exynos4412_pmu_central_seq(bool enable) > > > > > > You name the argument as "enable" but during initialization and > > > system running you pass here false. It confuses me. What do you enable > > > here? > > > > > > > Yep your are correct need to drop this function as already done in > > common frame work. > > > > > > +{ > > > > + unsigned int value; > > > > + > > > > + value = pmu_raw_readl(S5P_CENTRAL_SEQ_CONFIGURATION); > > > > + if (enable) > > > > + value &= ~S5P_CENTRAL_LOWPWR_CFG; > > > > + else > > > > + value |= S5P_CENTRAL_LOWPWR_CFG; > > > > + pmu_raw_writel(value, S5P_CENTRAL_SEQ_CONFIGURATION); > > > > > > You duplicate exynos_pm_central_suspend() without removing the original code. > > > > > > > + > > > > + value = pmu_raw_readl(S5P_CENTRAL_SEQ_CONFIGURATION_COREBLK); > > > > + if (enable) > > > > + value &= ~S5P_CENTRAL_LOWPWR_CFG; > > > > + else > > > > + value |= S5P_CENTRAL_LOWPWR_CFG; > > > > > > As manual says - set this register only if you disable C2C. Our entire > > > low power configuration for STOP mode is for C2C enabled case so you > > > add inconsistent configuration. > > > > Ok Sorry I overlook this code change. > > > > Enable system power down. Set only CENTRAL_SEQ_CONFIGURATION register > > if you disable C2C. > > Set both CENTRAL_SEQ_CONFIGURATION and > > CENTRAL_SEQ_CONFIGURATION_COREBLK registers if you enable C2C. > > > > > > + pmu_raw_writel(value, S5P_CENTRAL_SEQ_CONFIGURATION_COREBLK); > > > > +} > > > > + > > > > +static void exynos4412_pmu_init(void) > > > > +{ > > > > + unsigned int value; > > > > + int i; > > > > + > > > > + /* Enable USE_STANDBY_WFI for all CORE */ > > > > + pmu_raw_writel(S5P_USE_STANDBY_WFI_ALL, S5P_CENTRAL_SEQ_OPTION); > > > > > > This does not look related to improving suspend... it looks unrelated. > > > > > > > Ok yes your are correct all ready done in comment frame work. > > > > "Execute WFI/WFE for all CPU cores. As soon as all the CPU cores in > > Exynos 4412 SCP enter STANDBY mode" > > > > + > > > > + /* Decides whether to use retention capability */ > > > > + value = pmu_raw_readl(S5P_ARM_L2_0_OPTION); > > > > + value &= ~EXYNOS_L2_USE_RETENTION; > > > > + pmu_raw_writel(value, S5P_ARM_L2_0_OPTION); > > > > + > > > > + value = pmu_raw_readl(S5P_ARM_L2_1_OPTION); > > > > + value &= ~EXYNOS_L2_USE_RETENTION; > > > > + pmu_raw_writel(value, S5P_ARM_L2_1_OPTION); > > > > + > > > > + /* Set PSHOLD port for output high */ > > > > + value = pmu_raw_readl(S5P_PS_HOLD_CONTROL); > > > > + value |= S5P_PS_HOLD_OUTPUT_HIGH; > > > > + pmu_raw_writel(value, S5P_PS_HOLD_CONTROL); > > > > + > > > > + /* Enable signal for PSHOLD port */ > > > > + value = pmu_raw_readl(S5P_PS_HOLD_CONTROL); > > > > + value |= S5P_PS_HOLD_EN; > > > > + pmu_raw_writel(value, S5P_PS_HOLD_CONTROL); > > > > + > > > > > > The same - not related. > > > > PS_HOLD_CONTROL need to be set under following set > > Hardware reset Reset > > Watchdog timer reset Keep its value > > Software reset Keep its value > > Warm reset Keep its value > > Wakeup reset Keep its value > > Which is not related to suspend... > > > > > > > > > > + /* Enable only SC_FEEDBACK */ > > > > + for (i = 0; i < ARRAY_SIZE(exynos4412_list_feed); i++) { > > > > + value = pmu_raw_readl(exynos4412_list_feed[i]); > > > > + value &= ~(EXYNOS_USE_SC_COUNTER); > > > > + value |= EXYNOS_USE_SC_FEEDBACK; > > > > + pmu_raw_writel(value, exynos4412_list_feed[i]); > > > > > > Why do you prefer to use feedback instead of counter? > > > > > > > Their is a note below if we use this setting. > > NOTE: Either one of USE_SC_FEEDBACK and USE_SC_COUNTER should be activated. > > This is not the answer to my question at all. > > Best regards, > Krzysztof Once again sorry for wasting your time. I know I have the improve a lot of things. Best Regards -Anand
diff --git a/drivers/soc/samsung/exynos4-pmu.c b/drivers/soc/samsung/exynos4-pmu.c index a7cdbf1aac0c..d261a0d2371e 100644 --- a/drivers/soc/samsung/exynos4-pmu.c +++ b/drivers/soc/samsung/exynos4-pmu.c @@ -200,10 +200,93 @@ static const struct exynos_pmu_conf exynos4412_pmu_config[] = { { PMU_TABLE_END,}, }; +static unsigned int const exynos4412_list_feed[] = { + EXYNOS4_ARM_CORE0_OPTION, + EXYNOS4_ARM_CORE1_OPTION, + EXYNOS4_ARM_CORE2_OPTION, + EXYNOS4_ARM_CORE3_OPTION, + EXYNOS4_ARM_COMMON_OPTION, + EXYNOS4_CAM_OPTION, + EXYNOS4_TV_OPTION, + EXYNOS4_MFC_OPTION, + EXYNOS4_G3D_OPTION, + EXYNOS4_LCD0_OPTION, + EXYNOS4_ISP_OPTION, + EXYNOS4_MAUDIO_OPTION, + EXYNOS4_GPS_OPTION, + EXYNOS4_GPS_ALIVE_OPTION, +}; + +static void exynos4412_pmu_central_seq(bool enable) +{ + unsigned int value; + + value = pmu_raw_readl(S5P_CENTRAL_SEQ_CONFIGURATION); + if (enable) + value &= ~S5P_CENTRAL_LOWPWR_CFG; + else + value |= S5P_CENTRAL_LOWPWR_CFG; + pmu_raw_writel(value, S5P_CENTRAL_SEQ_CONFIGURATION); + + value = pmu_raw_readl(S5P_CENTRAL_SEQ_CONFIGURATION_COREBLK); + if (enable) + value &= ~S5P_CENTRAL_LOWPWR_CFG; + else + value |= S5P_CENTRAL_LOWPWR_CFG; + pmu_raw_writel(value, S5P_CENTRAL_SEQ_CONFIGURATION_COREBLK); +} + +static void exynos4412_pmu_init(void) +{ + unsigned int value; + int i; + + /* Enable USE_STANDBY_WFI for all CORE */ + pmu_raw_writel(S5P_USE_STANDBY_WFI_ALL, S5P_CENTRAL_SEQ_OPTION); + + /* Decides whether to use retention capability */ + value = pmu_raw_readl(S5P_ARM_L2_0_OPTION); + value &= ~EXYNOS_L2_USE_RETENTION; + pmu_raw_writel(value, S5P_ARM_L2_0_OPTION); + + value = pmu_raw_readl(S5P_ARM_L2_1_OPTION); + value &= ~EXYNOS_L2_USE_RETENTION; + pmu_raw_writel(value, S5P_ARM_L2_1_OPTION); + + /* Set PSHOLD port for output high */ + value = pmu_raw_readl(S5P_PS_HOLD_CONTROL); + value |= S5P_PS_HOLD_OUTPUT_HIGH; + pmu_raw_writel(value, S5P_PS_HOLD_CONTROL); + + /* Enable signal for PSHOLD port */ + value = pmu_raw_readl(S5P_PS_HOLD_CONTROL); + value |= S5P_PS_HOLD_EN; + pmu_raw_writel(value, S5P_PS_HOLD_CONTROL); + + /* Enable only SC_FEEDBACK */ + for (i = 0; i < ARRAY_SIZE(exynos4412_list_feed); i++) { + value = pmu_raw_readl(exynos4412_list_feed[i]); + value &= ~(EXYNOS_USE_SC_COUNTER); + value |= EXYNOS_USE_SC_FEEDBACK; + pmu_raw_writel(value, exynos4412_list_feed[i]); + } + + exynos4412_pmu_central_seq(false); + + pr_info("EXYNOS4x12 PMU Initialize\n"); +} + +static void exynos4412_powerdown_conf(enum sys_powerdown mode) +{ + exynos4412_pmu_central_seq(true); +} + const struct exynos_pmu_data exynos4210_pmu_data = { .pmu_config = exynos4210_pmu_config, }; const struct exynos_pmu_data exynos4412_pmu_data = { .pmu_config = exynos4412_pmu_config, + .pmu_init = exynos4412_pmu_init, + .powerdown_conf = exynos4412_powerdown_conf, }; diff --git a/include/linux/soc/samsung/exynos-regs-pmu.h b/include/linux/soc/samsung/exynos-regs-pmu.h index 5addaf5ccbce..6beed3e669d2 100644 --- a/include/linux/soc/samsung/exynos-regs-pmu.h +++ b/include/linux/soc/samsung/exynos-regs-pmu.h @@ -16,6 +16,8 @@ #define S5P_CENTRAL_SEQ_CONFIGURATION 0x0200 +#define S5P_CENTRAL_SEQ_CONFIGURATION_COREBLK 0x0240 + #define S5P_CENTRAL_LOWPWR_CFG (1 << 16) #define S5P_CENTRAL_SEQ_OPTION 0x0208 @@ -347,6 +349,25 @@ #define EXYNOS3_OPTION_USE_SC_FEEDBACK (1 << 1) #define EXYNOS3_OPTION_SKIP_DEACTIVATE_ACEACP_IN_PWDN (1 << 7) +/* EXYNOS4 */ +#define EXYNOS_USE_SC_FEEDBACK BIT(1) +#define EXYNOS_USE_SC_COUNTER BIT(0) + +#define EXYNOS4_ARM_CORE0_OPTION 0x2008 +#define EXYNOS4_ARM_CORE1_OPTION 0x2088 +#define EXYNOS4_ARM_CORE2_OPTION 0x2108 +#define EXYNOS4_ARM_CORE3_OPTION 0x2188 +#define EXYNOS4_ARM_COMMON_OPTION 0x2408 +#define EXYNOS4_CAM_OPTION 0x3C08 +#define EXYNOS4_TV_OPTION 0x3C28 +#define EXYNOS4_MFC_OPTION 0x3C48 +#define EXYNOS4_G3D_OPTION 0x3C68 +#define EXYNOS4_LCD0_OPTION 0x3C88 +#define EXYNOS4_ISP_OPTION 0x3CA8 +#define EXYNOS4_MAUDIO_OPTION 0x3CC8 +#define EXYNOS4_GPS_OPTION 0x3CE8 +#define EXYNOS4_GPS_ALIVE_OPTION 0x3D08 + /* For EXYNOS5 */ #define EXYNOS5_AUTO_WDTRESET_DISABLE 0x0408
This patch adds configration for PMU (Power Management Unit) state tuning for exynos4412 SoC in order to enter low-power mode during suspend power modes and help resume from suspend state. Fixes: bfce552d0b1 ("drivers: soc: Add support for Exynos PMU driver") Cc: Marek Szyprowski <m.szyprowski@samsung.com> Cc: Krzysztof Kozlowski <krzk@kernel.org> Cc: Chanwoo Choi <cw00.choi@samsung.com> Signed-off-by: Anand Moon <linux.amoon@gmail.com> --- Changes from previous patch. New patch to this series to support suspend and resume state Changes have been tested on microSD card but fails to resume on cMMC. It need to be investigated and more debuging --- drivers/soc/samsung/exynos4-pmu.c | 83 +++++++++++++++++++++ include/linux/soc/samsung/exynos-regs-pmu.h | 21 ++++++ 2 files changed, 104 insertions(+)