| From ef6d03bee55202942494b2447047f0c8add5c3ff Mon Sep 17 00:00:00 2001 |
| From: Sasha Levin <sashal@kernel.org> |
| Date: Tue, 24 Mar 2020 19:07:38 +0100 |
| Subject: mmc: sdhci-tegra: Fix busy detection by enabling |
| MMC_CAP_NEED_RSP_BUSY |
| |
| From: Ulf Hansson <ulf.hansson@linaro.org> |
| |
| [ Upstream commit d2f8bfa4bff5028bc40ed56b4497c32e05b0178f ] |
| |
| It has turned out that the sdhci-tegra controller requires the R1B response, |
| for commands that has this response associated with them. So, converting |
| from an R1B to an R1 response for a CMD6 for example, leads to problems |
| with the HW busy detection support. |
| |
| Fix this by informing the mmc core about the requirement, via setting the |
| host cap, MMC_CAP_NEED_RSP_BUSY. |
| |
| Reported-by: Bitan Biswas <bbiswas@nvidia.com> |
| Reported-by: Peter Geis <pgwipeout@gmail.com> |
| Suggested-by: Sowjanya Komatineni <skomatineni@nvidia.com> |
| Cc: <stable@vger.kernel.org> |
| Tested-by: Sowjanya Komatineni <skomatineni@nvidia.com> |
| Tested-By: Peter Geis <pgwipeout@gmail.com> |
| Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> |
| Signed-off-by: Sasha Levin <sashal@kernel.org> |
| --- |
| drivers/mmc/host/sdhci-tegra.c | 3 +++ |
| 1 file changed, 3 insertions(+) |
| |
| --- a/drivers/mmc/host/sdhci-tegra.c |
| +++ b/drivers/mmc/host/sdhci-tegra.c |
| @@ -1552,6 +1552,9 @@ static int sdhci_tegra_probe(struct plat |
| if (tegra_host->soc_data->nvquirks & NVQUIRK_ENABLE_DDR50) |
| host->mmc->caps |= MMC_CAP_1_8V_DDR; |
| |
| + /* R1B responses is required to properly manage HW busy detection. */ |
| + host->mmc->caps |= MMC_CAP_NEED_RSP_BUSY; |
| + |
| tegra_sdhci_parse_dt(host); |
| |
| tegra_host->power_gpio = devm_gpiod_get_optional(&pdev->dev, "power", |
