DRA725: Repeated power-up/down tests caused register values to change

Cherry Zhou

Mastermind 22235 points

Part Number: DRA725

Hi team,

Here's an issue from the customer may need your help:

SDK version：tisdk-rootfs-image-dra7xx-evm_vsdk_3_5

1) Switch machine test repeatedly, boot (14 v 1A 30 seconds) shutdown (0 v 10 seconds)

2) Phenomenon of the problem: after the test, the screen does not display, read the relevant register values, found DISPC_GFX_ATTRIBUTES values change
Relating to register:

Register	Normal value	fault value
DISPC_CONFIG1	0x00000C04	NULL
DISPC_CONFIG2	0x00000000	NULL
DISPC_CONFIG3	0x00000000	NULL
DISPC_GLOBAL_ALPHA	0xFFFFFFFF	NULL
DISPC_TRANS_COLOR0	0x00000000	NULL
DISPC_TRANS_COLOR1	0x00000000	NULL
DISPC_TRANS_COLOR2	0x00000000	NULL
DISPC_TRANS_COLOR3	0x00000000	NULL
DISPC_GFX_ATTRIBUTES	0x0E000891	0x0E0000A0
DISPC_VID1_ATTRIBUTES	0x02288873	NULL
DISPC_VID2_ATTRIBUTES	0x06008400	NULL
DISPC_VID3_ATTRIBUTES	0x0A288A60	NULL