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Commit 53f92829 authored by Sujit Reddy Thumma's avatar Sujit Reddy Thumma
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scsi: ufs: add quirk for broken power mode change 



Power mode change after bootup might be broken on some of the
UFS devices. Add a quirk to bypass power mode change during bootup.

Change-Id: I04c5dfa3380f1cec8a6f431ec6661ea189b11134
Signed-off-by: default avatarSujit Reddy Thumma <sthumma@codeaurora.org>
parent 2772e97d

drivers/scsi/ufs/ufshcd.c

+3 −0
Original line number Diff line number Diff line
@@ -1806,6 +1806,9 @@ static int ufshcd_config_max_pwr_mode(struct ufs_hba *hba) 
	u8 pwr[] = {FASTAUTO_MODE, FASTAUTO_MODE};

	int ret;



	if (hba->quirks & UFSHCD_QUIRK_BROKEN_PWR_MODE_CHANGE)

		return 0;



	/* Get the connected lane count */

	ufshcd_dme_get(hba, UIC_ARG_MIB(PA_CONNECTEDRXDATALANES), &lanes[RX]);

	ufshcd_dme_get(hba, UIC_ARG_MIB(PA_CONNECTEDTXDATALANES), &lanes[TX]);

drivers/scsi/ufs/ufshcd.h

+6 −0
Original line number Diff line number Diff line
@@ -307,6 +307,12 @@ struct ufs_hba { 
	 * controller to have a single command at a time for the device */

	#define UFSHCD_QUIRK_BROKEN_DEVICE_Q_CMND        (1 << 4)



	/*

	 * Power mode switch is broken, the power mode will be default

	 * to PWM-G1 or the one set by bootloader.

	 */

	#define UFSHCD_QUIRK_BROKEN_PWR_MODE_CHANGE      (1 << 5)



	struct uic_command *active_uic_cmd;

	struct mutex uic_cmd_mutex;