| From b124345726361ef6b32e53ac57169076e43a4579 Mon Sep 17 00:00:00 2001 |
| From: Veerabhadrarao Badiganti <vbadigan@codeaurora.org> |
| Date: Mon, 20 Apr 2020 11:50:23 +0530 |
| Subject: [PATCH] mmc: sdhci-msm: Enable host capabilities pertains to R1b |
| response |
| |
| commit 9d8cb58691f85cef687512262acb2c7109ee4868 upstream. |
| |
| MSM sd host controller is capable of HW busy detection of device busy |
| signaling over DAT0 line. And it requires the R1B response for commands |
| that have this response associated with them. |
| |
| So set the below two host capabilities for qcom SDHC. |
| - MMC_CAP_WAIT_WHILE_BUSY |
| - MMC_CAP_NEED_RSP_BUSY |
| |
| Recent development of the mmc core in regards to this, revealed this as |
| being a potential bug, hence the stable tag. |
| |
| Cc: <stable@vger.kernel.org> # v4.19+ |
| Signed-off-by: Veerabhadrarao Badiganti <vbadigan@codeaurora.org> |
| Acked-by: Adrian Hunter <adrian.hunter@intel.com> |
| Link: https://lore.kernel.org/r/1587363626-20413-2-git-send-email-vbadigan@codeaurora.org |
| Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> |
| Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> |
| |
| diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c |
| index 08e96072c027..82dd7d1247bb 100644 |
| --- a/drivers/mmc/host/sdhci-msm.c |
| +++ b/drivers/mmc/host/sdhci-msm.c |
| @@ -1946,6 +1946,8 @@ static int sdhci_msm_probe(struct platform_device *pdev) |
| goto clk_disable; |
| } |
| |
| + msm_host->mmc->caps |= MMC_CAP_WAIT_WHILE_BUSY | MMC_CAP_NEED_RSP_BUSY; |
| + |
| pm_runtime_get_noresume(&pdev->dev); |
| pm_runtime_set_active(&pdev->dev); |
| pm_runtime_enable(&pdev->dev); |
| -- |
| 2.7.4 |
| |
