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Commit 55151ee9 authored by Konstantin Dorfman's avatar Konstantin Dorfman Committed by Ram Prakash Gupta
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mmc: sdhci-msm: Add tracepoints to enhance pm debugging 



Instrument the sdhci-msm platform driver with tracepoints to aid in
debugging issues and identifying latencies in the following
paths:
* System suspend/resume
* Runtime suspend/resume.

Change-Id: I4fed1c2ccba7d5d7f978f161e7985c98e869d1d8
Signed-off-by: default avatarKonstantin Dorfman <kdorfman@codeaurora.org>
[xiaonian@codeaurora.org: fixedtrivial merge conflicts]
Signed-off-by: default avatarXiaonian Wang <xiaonian@codeaurora.org>
Signed-off-by: default avatarRam Prakash Gupta <rampraka@codeaurora.org>
parent 2cdbda7c

drivers/mmc/host/sdhci-msm.c

+15 −1
Original line number Diff line number Diff line
@@ -5511,6 +5511,7 @@ static int sdhci_msm_runtime_suspend(struct device *dev) 
	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);

	struct sdhci_msm_host *msm_host = pltfm_host->priv;

	int ret;

	ktime_t start = ktime_get();



	if (host->mmc->card && mmc_card_sdio(host->mmc->card))

		goto defer_disable_host_irq;
@@ -5536,7 +5537,8 @@ static int sdhci_msm_runtime_suspend(struct device *dev) 
			pr_err("%s: failed to suspend crypto engine %d\n",

					mmc_hostname(host->mmc), ret);

	}



	trace_sdhci_msm_runtime_suspend(mmc_hostname(host->mmc), 0,

			ktime_to_us(ktime_sub(ktime_get(), start)));

	return 0;

}
@@ -5546,6 +5548,7 @@ static int sdhci_msm_runtime_resume(struct device *dev) 
	struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);

	struct sdhci_msm_host *msm_host = pltfm_host->priv;

	int ret;

	ktime_t start = ktime_get();



	if (host->is_crypto_en) {

		ret = sdhci_msm_enable_controller_clock(host);
@@ -5568,6 +5571,9 @@ static int sdhci_msm_runtime_resume(struct device *dev) 


defer_enable_host_irq:

	enable_irq(msm_host->pwr_irq);



	trace_sdhci_msm_runtime_resume(mmc_hostname(host->mmc), 0,

			ktime_to_us(ktime_sub(ktime_get(), start)));

	return 0;

}
@@ -5578,6 +5584,7 @@ static int sdhci_msm_suspend(struct device *dev) 
	struct sdhci_msm_host *msm_host = pltfm_host->priv;

	int ret = 0;

	int sdio_cfg = 0;

	ktime_t start = ktime_get();



	if (gpio_is_valid(msm_host->pdata->status_gpio) &&

			 (msm_host->mmc->slot.cd_irq >= 0))
@@ -5596,6 +5603,9 @@ static int sdhci_msm_suspend(struct device *dev) 
		if (sdio_cfg)

			sdhci_cfg_irq(host, false, true);

	}



	trace_sdhci_msm_suspend(mmc_hostname(host->mmc), ret,

			ktime_to_us(ktime_sub(ktime_get(), start)));

	return ret;

}
@@ -5606,6 +5616,7 @@ static int sdhci_msm_resume(struct device *dev) 
	struct sdhci_msm_host *msm_host = pltfm_host->priv;

	int ret = 0;

	int sdio_cfg = 0;

	ktime_t start = ktime_get();



	if (gpio_is_valid(msm_host->pdata->status_gpio) &&

			 (msm_host->mmc->slot.cd_irq >= 0))
@@ -5624,6 +5635,9 @@ static int sdhci_msm_resume(struct device *dev) 
		if (sdio_cfg)

			sdhci_cfg_irq(host, true, true);

	}



	trace_sdhci_msm_resume(mmc_hostname(host->mmc), ret,

			ktime_to_us(ktime_sub(ktime_get(), start)));

	return ret;

}