linux-kernel - [PATCH v1 5/7] bus: mhi: core: Identify Flash Programmer as a mission mode use case

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Date:   Mon, 29 Mar 2021 18:28:22 -0700
From:   Bhaumik Bhatt <bbhatt@...eaurora.org>
To:     manivannan.sadhasivam@...aro.org
Cc:     linux-arm-msm@...r.kernel.org, hemantk@...eaurora.org,
        jhugo@...eaurora.org, linux-kernel@...r.kernel.org,
        carl.yin@...ctel.com, naveen.kumar@...ctel.com,
        loic.poulain@...aro.org, abickett@...eaurora.org,
        Bhaumik Bhatt <bbhatt@...eaurora.org>
Subject: [PATCH v1 5/7] bus: mhi: core: Identify Flash Programmer as a mission mode use case

MHI power up can go through an EDL to Flash Programmer path when
the device has a blank NAND. In those cases, mhi_sync_power_up()
can timeout waiting for a mission mode execution environment.
Allow a successful power up instead by identifying Flash
Programmer as a valid mission mode execution environment with a
purpose to flash the device image contents.

Signed-off-by: Bhaumik Bhatt <bbhatt@...eaurora.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
---
 drivers/bus/mhi/core/internal.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/bus/mhi/core/internal.h b/drivers/bus/mhi/core/internal.h
index b1b5f2b..7aa5cfd 100644
--- a/drivers/bus/mhi/core/internal.h
+++ b/drivers/bus/mhi/core/internal.h
@@ -379,7 +379,8 @@ extern const char * const mhi_ee_str[MHI_EE_MAX];
 #define MHI_IN_PBL(ee) (ee == MHI_EE_PBL || ee == MHI_EE_PTHRU || \
 			ee == MHI_EE_EDL)
 
-#define MHI_IN_MISSION_MODE(ee) (ee == MHI_EE_AMSS || ee == MHI_EE_WFW)
+#define MHI_IN_MISSION_MODE(ee) (ee == MHI_EE_AMSS || ee == MHI_EE_WFW || \
+				 ee == MHI_EE_FP)
 
 enum dev_st_transition {
 	DEV_ST_TRANSITION_PBL,
-- 
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