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Commit d3656129 authored Mar 13, 2020 by Linus Torvalds

Merge tag 'mmc-v5.6-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc

Pull MMC fixes from Ulf Hansson:
 "MMC core:

   - Fix HW busy detection support for host controllers requiring the
     MMC_RSP_BUSY response flag (R1B) to be set for the command. In
     particular for CMD6 (eMMC), erase/trim/discard (SD/eMMC) and CMD5
     (eMMC sleep).

  MMC host:

   - sdhci-omap|tegra: Fix support for HW busy detection"

* tag 'mmc-v5.6-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
  mmc: core: Respect MMC_CAP_NEED_RSP_BUSY for eMMC sleep command
  mmc: sdhci-tegra: Fix busy detection by enabling MMC_CAP_NEED_RSP_BUSY
  mmc: sdhci-omap: Fix busy detection by enabling MMC_CAP_NEED_RSP_BUSY
  mmc: core: Respect MMC_CAP_NEED_RSP_BUSY for erase/trim/discard
  mmc: core: Allow host controllers to require R1B for CMD6

parents ddd2b85f 18d20046

drivers/mmc/core/core.c

+4 −1

Original line number	Original line	Diff line number	Diff line
	@@ -1732,8 +1732,11 @@ static int mmc_do_erase(struct mmc_card *card, unsigned int from,
	* the erase operation does not exceed the max_busy_timeout, we should		* the erase operation does not exceed the max_busy_timeout, we should
	* use R1B response. Or we need to prevent the host from doing hw busy		* use R1B response. Or we need to prevent the host from doing hw busy
	* detection, which is done by converting to a R1 response instead.		* detection, which is done by converting to a R1 response instead.
			* Note, some hosts requires R1B, which also means they are on their own
			* when it comes to deal with the busy timeout.
	*/		*/
	if (card->host->max_busy_timeout &&		if (!(card->host->caps & MMC_CAP_NEED_RSP_BUSY) &&
			card->host->max_busy_timeout &&
	busy_timeout > card->host->max_busy_timeout) {		busy_timeout > card->host->max_busy_timeout) {
	cmd.flags = MMC_RSP_SPI_R1 \| MMC_RSP_R1 \| MMC_CMD_AC;		cmd.flags = MMC_RSP_SPI_R1 \| MMC_RSP_R1 \| MMC_CMD_AC;
	} else {		} else {

drivers/mmc/core/mmc.c

+5 −2

Original line number	Original line	Diff line number	Diff line
	@@ -1910,9 +1910,12 @@ static int mmc_sleep(struct mmc_host *host)
	* If the max_busy_timeout of the host is specified, validate it against		* If the max_busy_timeout of the host is specified, validate it against
	* the sleep cmd timeout. A failure means we need to prevent the host		* the sleep cmd timeout. A failure means we need to prevent the host
	* from doing hw busy detection, which is done by converting to a R1		* from doing hw busy detection, which is done by converting to a R1
	* response instead of a R1B.		* response instead of a R1B. Note, some hosts requires R1B, which also
			* means they are on their own when it comes to deal with the busy
			* timeout.
	*/		*/
	if (host->max_busy_timeout && (timeout_ms > host->max_busy_timeout)) {		if (!(host->caps & MMC_CAP_NEED_RSP_BUSY) && host->max_busy_timeout &&
			(timeout_ms > host->max_busy_timeout)) {
	cmd.flags = MMC_RSP_R1 \| MMC_CMD_AC;		cmd.flags = MMC_RSP_R1 \| MMC_CMD_AC;
	} else {		} else {
	cmd.flags = MMC_RSP_R1B \| MMC_CMD_AC;		cmd.flags = MMC_RSP_R1B \| MMC_CMD_AC;

drivers/mmc/core/mmc_ops.c

+4 −2

Original line number	Original line	Diff line number	Diff line
	@@ -542,9 +542,11 @@ int __mmc_switch(struct mmc_card *card, u8 set, u8 index, u8 value,
	* If the max_busy_timeout of the host is specified, make sure it's		* If the max_busy_timeout of the host is specified, make sure it's
	* enough to fit the used timeout_ms. In case it's not, let's instruct		* enough to fit the used timeout_ms. In case it's not, let's instruct
	* the host to avoid HW busy detection, by converting to a R1 response		* the host to avoid HW busy detection, by converting to a R1 response
	* instead of a R1B.		* instead of a R1B. Note, some hosts requires R1B, which also means
			* they are on their own when it comes to deal with the busy timeout.
	*/		*/
	if (host->max_busy_timeout && (timeout_ms > host->max_busy_timeout))		if (!(host->caps & MMC_CAP_NEED_RSP_BUSY) && host->max_busy_timeout &&
			(timeout_ms > host->max_busy_timeout))
	use_r1b_resp = false;		use_r1b_resp = false;

	cmd.opcode = MMC_SWITCH;		cmd.opcode = MMC_SWITCH;

drivers/mmc/host/sdhci-omap.c

+3 −0

Original line number	Original line	Diff line number	Diff line
	@@ -1192,6 +1192,9 @@ static int sdhci_omap_probe(struct platform_device *pdev)
	if (of_find_property(dev->of_node, "dmas", NULL))		if (of_find_property(dev->of_node, "dmas", NULL))
	sdhci_switch_external_dma(host, true);		sdhci_switch_external_dma(host, true);

			/* R1B responses is required to properly manage HW busy detection. */
			mmc->caps \|= MMC_CAP_NEED_RSP_BUSY;

	ret = sdhci_setup_host(host);		ret = sdhci_setup_host(host);
	if (ret)		if (ret)
	goto err_put_sync;		goto err_put_sync;

drivers/mmc/host/sdhci-tegra.c

+3 −0

Original line number	Original line	Diff line number	Diff line
	@@ -1552,6 +1552,9 @@ static int sdhci_tegra_probe(struct platform_device *pdev)
	if (tegra_host->soc_data->nvquirks & NVQUIRK_ENABLE_DDR50)		if (tegra_host->soc_data->nvquirks & NVQUIRK_ENABLE_DDR50)
	host->mmc->caps \|= MMC_CAP_1_8V_DDR;		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_sdhci_parse_dt(host);

	tegra_host->power_gpio = devm_gpiod_get_optional(&pdev->dev, "power",		tegra_host->power_gpio = devm_gpiod_get_optional(&pdev->dev, "power",

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