* [PATCH] mmc: sdhci-msm: Optionally wait for signal level changes
@ 2017-11-20 18:34 Bjorn Andersson
2017-11-20 19:25 ` Stephen Boyd
2017-11-20 19:56 ` [PATCH v2] " Bjorn Andersson
0 siblings, 2 replies; 5+ messages in thread
From: Bjorn Andersson @ 2017-11-20 18:34 UTC (permalink / raw)
To: Adrian Hunter, Ulf Hansson
Cc: linux-mmc, linux-kernel, linux-arm-msm, Sahitya Tummala, Vijay Viswanath
Not all instances of the SDCC core supports changing signal voltage and
as such will not generate a power interrupt when the software attempts
to change the voltage. This results in probing the eMMC on some devices
to take over 2 minutes.
Check that the SWITCHABLE_SIGNAL_VOLTAGE bit in MCI_GENERICS is set
before waiting for the power interrupt.
Cc: Sahitya Tummala <stummala@codeaurora.org>
Cc: Vijay Viswanath <vviswana@codeaurora.org>
Fixes: c0309b3803fe ("mmc: sdhci-msm: Add sdhci msm register write APIs which wait for pwr irq")
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
The offending patch is part of your v4.15 pull request, so please pick
this up for the -rcs.
drivers/mmc/host/sdhci-msm.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c
index 3fb7d2eec93f..8f2dda73e6b4 100644
--- a/drivers/mmc/host/sdhci-msm.c
+++ b/drivers/mmc/host/sdhci-msm.c
@@ -29,6 +29,9 @@
#define CORE_VERSION_MAJOR_MASK (0xf << CORE_VERSION_MAJOR_SHIFT)
#define CORE_VERSION_MINOR_MASK 0xff
+#define CORE_MCI_GENERICS 0x70
+#define SWICHABLE_SIGNALING_VOLTAGE BIT(29)
+
#define CORE_HC_MODE 0x78
#define HC_MODE_EN 0x1
#define CORE_POWER 0x0
@@ -1028,11 +1031,22 @@ static void sdhci_msm_check_power_status(struct sdhci_host *host, u32 req_type)
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host);
bool done = false;
+ u32 val;
pr_debug("%s: %s: request %d curr_pwr_state %x curr_io_level %x\n",
mmc_hostname(host->mmc), __func__, req_type,
msm_host->curr_pwr_state, msm_host->curr_io_level);
+ /*
+ * The power interrupt will not be generated for signal voltage
+ * switches if SWICHABLE_SIGNALING_VOLTAGE in MCI_GENERICS is not set
+ */
+ val = readl(msm_host->core_mem + CORE_MCI_GENERICS);
+ if ((req_type & REQ_IO_HIGH || req_type & REQ_IO_LOW) &&
+ !(val & SWICHABLE_SIGNALING_VOLTAGE)) {
+ return;
+ }
+
/*
* The IRQ for request type IO High/LOW will be generated when -
* there is a state change in 1.8V enable bit (bit 3) of
--
2.15.0
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH] mmc: sdhci-msm: Optionally wait for signal level changes
2017-11-20 18:34 [PATCH] mmc: sdhci-msm: Optionally wait for signal level changes Bjorn Andersson
@ 2017-11-20 19:25 ` Stephen Boyd
2017-11-20 19:56 ` [PATCH v2] " Bjorn Andersson
1 sibling, 0 replies; 5+ messages in thread
From: Stephen Boyd @ 2017-11-20 19:25 UTC (permalink / raw)
To: Bjorn Andersson
Cc: Adrian Hunter, Ulf Hansson, linux-mmc, linux-kernel,
linux-arm-msm, Sahitya Tummala, Vijay Viswanath
On 11/20, Bjorn Andersson wrote:
> Not all instances of the SDCC core supports changing signal voltage and
> as such will not generate a power interrupt when the software attempts
> to change the voltage. This results in probing the eMMC on some devices
> to take over 2 minutes.
>
> Check that the SWITCHABLE_SIGNAL_VOLTAGE bit in MCI_GENERICS is set
T in SWITCHABLE_SIGNAL_VOLTAGE here.
> before waiting for the power interrupt.
>
> Cc: Sahitya Tummala <stummala@codeaurora.org>
> Cc: Vijay Viswanath <vviswana@codeaurora.org>
> Fixes: c0309b3803fe ("mmc: sdhci-msm: Add sdhci msm register write APIs which wait for pwr irq")
> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
> ---
>
> The offending patch is part of your v4.15 pull request, so please pick
> this up for the -rcs.
>
> drivers/mmc/host/sdhci-msm.c | 14 ++++++++++++++
> 1 file changed, 14 insertions(+)
>
> diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c
> index 3fb7d2eec93f..8f2dda73e6b4 100644
> --- a/drivers/mmc/host/sdhci-msm.c
> +++ b/drivers/mmc/host/sdhci-msm.c
> @@ -29,6 +29,9 @@
> #define CORE_VERSION_MAJOR_MASK (0xf << CORE_VERSION_MAJOR_SHIFT)
> #define CORE_VERSION_MINOR_MASK 0xff
>
> +#define CORE_MCI_GENERICS 0x70
> +#define SWICHABLE_SIGNALING_VOLTAGE BIT(29)
But then the T isn't here.
--
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project
^ permalink raw reply [flat|nested] 5+ messages in thread
* [PATCH v2] mmc: sdhci-msm: Optionally wait for signal level changes
2017-11-20 18:34 [PATCH] mmc: sdhci-msm: Optionally wait for signal level changes Bjorn Andersson
2017-11-20 19:25 ` Stephen Boyd
@ 2017-11-20 19:56 ` Bjorn Andersson
2017-11-21 19:38 ` [v2] " Luca Weiss
2017-11-23 18:13 ` [PATCH v2] " Ulf Hansson
1 sibling, 2 replies; 5+ messages in thread
From: Bjorn Andersson @ 2017-11-20 19:56 UTC (permalink / raw)
To: Adrian Hunter, Ulf Hansson
Cc: linux-mmc, linux-kernel, linux-arm-msm, Stephen Boyd,
Sahitya Tummala, Vijay Viswanath
Not all instances of the SDCC core supports changing signal voltage and
as such will not generate a power interrupt when the software attempts
to change the voltage. This results in probing the eMMC on some devices
to take over 2 minutes.
Check that the SWITCHABLE_SIGNALING_VOLTAGE bit in MCI_GENERICS is set
before waiting for the power interrupt.
Cc: Sahitya Tummala <stummala@codeaurora.org>
Cc: Vijay Viswanath <vviswana@codeaurora.org>
Fixes: c0309b3803fe ("mmc: sdhci-msm: Add sdhci msm register write APIs which wait for pwr irq")
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
---
The offending patch is part of your v4.15 pull request, so please pick
this up for the -rcs.
Changes since v1:
- Fixed spelling of swichable...
drivers/mmc/host/sdhci-msm.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c
index 3fb7d2eec93f..c283291db705 100644
--- a/drivers/mmc/host/sdhci-msm.c
+++ b/drivers/mmc/host/sdhci-msm.c
@@ -29,6 +29,9 @@
#define CORE_VERSION_MAJOR_MASK (0xf << CORE_VERSION_MAJOR_SHIFT)
#define CORE_VERSION_MINOR_MASK 0xff
+#define CORE_MCI_GENERICS 0x70
+#define SWITCHABLE_SIGNALING_VOLTAGE BIT(29)
+
#define CORE_HC_MODE 0x78
#define HC_MODE_EN 0x1
#define CORE_POWER 0x0
@@ -1028,11 +1031,22 @@ static void sdhci_msm_check_power_status(struct sdhci_host *host, u32 req_type)
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host);
bool done = false;
+ u32 val;
pr_debug("%s: %s: request %d curr_pwr_state %x curr_io_level %x\n",
mmc_hostname(host->mmc), __func__, req_type,
msm_host->curr_pwr_state, msm_host->curr_io_level);
+ /*
+ * The power interrupt will not be generated for signal voltage
+ * switches if SWITCHABLE_SIGNALING_VOLTAGE in MCI_GENERICS is not set.
+ */
+ val = readl(msm_host->core_mem + CORE_MCI_GENERICS);
+ if ((req_type & REQ_IO_HIGH || req_type & REQ_IO_LOW) &&
+ !(val & SWITCHABLE_SIGNALING_VOLTAGE)) {
+ return;
+ }
+
/*
* The IRQ for request type IO High/LOW will be generated when -
* there is a state change in 1.8V enable bit (bit 3) of
--
2.15.0
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [v2] mmc: sdhci-msm: Optionally wait for signal level changes
2017-11-20 19:56 ` [PATCH v2] " Bjorn Andersson
@ 2017-11-21 19:38 ` Luca Weiss
2017-11-23 18:13 ` [PATCH v2] " Ulf Hansson
1 sibling, 0 replies; 5+ messages in thread
From: Luca Weiss @ 2017-11-21 19:38 UTC (permalink / raw)
To: Bjorn Andersson
Cc: Adrian Hunter, Ulf Hansson, linux-mmc, linux-kernel,
linux-arm-msm, Stephen Boyd, Sahitya Tummala, Vijay Viswanath
On Montag, 20. November 2017 20:56:47 CET Bjorn Andersson wrote:
> Not all instances of the SDCC core supports changing signal voltage and
> as such will not generate a power interrupt when the software attempts
> to change the voltage. This results in probing the eMMC on some devices
> to take over 2 minutes.
>
> Check that the SWITCHABLE_SIGNALING_VOLTAGE bit in MCI_GENERICS is set
> before waiting for the power interrupt.
>
> Cc: Sahitya Tummala <stummala@codeaurora.org>
> Cc: Vijay Viswanath <vviswana@codeaurora.org>
> Fixes: c0309b3803fe ("mmc: sdhci-msm: Add sdhci msm register write APIs
> which wait for pwr irq") Signed-off-by: Bjorn Andersson
> <bjorn.andersson@linaro.org>
Tested-by: Luca Weiss <luca@z3ntu.xyz>
> ---
>
> The offending patch is part of your v4.15 pull request, so please pick
> this up for the -rcs.
>
> Changes since v1:
> - Fixed spelling of swichable...
>
> drivers/mmc/host/sdhci-msm.c | 14 ++++++++++++++
> 1 file changed, 14 insertions(+)
>
> diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c
> index 3fb7d2eec93f..c283291db705 100644
> --- a/drivers/mmc/host/sdhci-msm.c
> +++ b/drivers/mmc/host/sdhci-msm.c
> @@ -29,6 +29,9 @@
> #define CORE_VERSION_MAJOR_MASK (0xf << CORE_VERSION_MAJOR_SHIFT)
> #define CORE_VERSION_MINOR_MASK 0xff
>
> +#define CORE_MCI_GENERICS 0x70
> +#define SWITCHABLE_SIGNALING_VOLTAGE BIT(29)
> +
> #define CORE_HC_MODE 0x78
> #define HC_MODE_EN 0x1
> #define CORE_POWER 0x0
> @@ -1028,11 +1031,22 @@ static void sdhci_msm_check_power_status(struct
> sdhci_host *host, u32 req_type) struct sdhci_pltfm_host *pltfm_host =
> sdhci_priv(host);
> struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host);
> bool done = false;
> + u32 val;
>
> pr_debug("%s: %s: request %d curr_pwr_state %x curr_io_level %x\n",
> mmc_hostname(host->mmc), __func__, req_type,
> msm_host->curr_pwr_state, msm_host->curr_io_level);
>
> + /*
> + * The power interrupt will not be generated for signal voltage
> + * switches if SWITCHABLE_SIGNALING_VOLTAGE in MCI_GENERICS is not set.
> + */
> + val = readl(msm_host->core_mem + CORE_MCI_GENERICS);
> + if ((req_type & REQ_IO_HIGH || req_type & REQ_IO_LOW) &&
> + !(val & SWITCHABLE_SIGNALING_VOLTAGE)) {
> + return;
> + }
> +
> /*
> * The IRQ for request type IO High/LOW will be generated when -
> * there is a state change in 1.8V enable bit (bit 3) of
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH v2] mmc: sdhci-msm: Optionally wait for signal level changes
2017-11-20 19:56 ` [PATCH v2] " Bjorn Andersson
2017-11-21 19:38 ` [v2] " Luca Weiss
@ 2017-11-23 18:13 ` Ulf Hansson
1 sibling, 0 replies; 5+ messages in thread
From: Ulf Hansson @ 2017-11-23 18:13 UTC (permalink / raw)
To: Bjorn Andersson
Cc: Adrian Hunter, linux-mmc, linux-kernel, linux-arm-msm,
Stephen Boyd, Sahitya Tummala, Vijay Viswanath
On 20 November 2017 at 20:56, Bjorn Andersson
<bjorn.andersson@linaro.org> wrote:
> Not all instances of the SDCC core supports changing signal voltage and
> as such will not generate a power interrupt when the software attempts
> to change the voltage. This results in probing the eMMC on some devices
> to take over 2 minutes.
>
> Check that the SWITCHABLE_SIGNALING_VOLTAGE bit in MCI_GENERICS is set
> before waiting for the power interrupt.
>
> Cc: Sahitya Tummala <stummala@codeaurora.org>
> Cc: Vijay Viswanath <vviswana@codeaurora.org>
> Fixes: c0309b3803fe ("mmc: sdhci-msm: Add sdhci msm register write APIs which wait for pwr irq")
> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Thanks, applied for fixes!
Kind regards
Uffe
> ---
>
> The offending patch is part of your v4.15 pull request, so please pick
> this up for the -rcs.
>
> Changes since v1:
> - Fixed spelling of swichable...
>
> drivers/mmc/host/sdhci-msm.c | 14 ++++++++++++++
> 1 file changed, 14 insertions(+)
>
> diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c
> index 3fb7d2eec93f..c283291db705 100644
> --- a/drivers/mmc/host/sdhci-msm.c
> +++ b/drivers/mmc/host/sdhci-msm.c
> @@ -29,6 +29,9 @@
> #define CORE_VERSION_MAJOR_MASK (0xf << CORE_VERSION_MAJOR_SHIFT)
> #define CORE_VERSION_MINOR_MASK 0xff
>
> +#define CORE_MCI_GENERICS 0x70
> +#define SWITCHABLE_SIGNALING_VOLTAGE BIT(29)
> +
> #define CORE_HC_MODE 0x78
> #define HC_MODE_EN 0x1
> #define CORE_POWER 0x0
> @@ -1028,11 +1031,22 @@ static void sdhci_msm_check_power_status(struct sdhci_host *host, u32 req_type)
> struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
> struct sdhci_msm_host *msm_host = sdhci_pltfm_priv(pltfm_host);
> bool done = false;
> + u32 val;
>
> pr_debug("%s: %s: request %d curr_pwr_state %x curr_io_level %x\n",
> mmc_hostname(host->mmc), __func__, req_type,
> msm_host->curr_pwr_state, msm_host->curr_io_level);
>
> + /*
> + * The power interrupt will not be generated for signal voltage
> + * switches if SWITCHABLE_SIGNALING_VOLTAGE in MCI_GENERICS is not set.
> + */
> + val = readl(msm_host->core_mem + CORE_MCI_GENERICS);
> + if ((req_type & REQ_IO_HIGH || req_type & REQ_IO_LOW) &&
> + !(val & SWITCHABLE_SIGNALING_VOLTAGE)) {
> + return;
> + }
> +
> /*
> * The IRQ for request type IO High/LOW will be generated when -
> * there is a state change in 1.8V enable bit (bit 3) of
> --
> 2.15.0
>
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2017-11-23 18:13 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
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2017-11-20 18:34 [PATCH] mmc: sdhci-msm: Optionally wait for signal level changes Bjorn Andersson
2017-11-20 19:25 ` Stephen Boyd
2017-11-20 19:56 ` [PATCH v2] " Bjorn Andersson
2017-11-21 19:38 ` [v2] " Luca Weiss
2017-11-23 18:13 ` [PATCH v2] " Ulf Hansson
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