5bba78331d
This change implements a new feature to read the cmds response of the panel from sde connector interface. Sde connector opens debugfs interface for all the connectors those have support for cmd receive operation. Sde connector init module creates rx_cmd debugfs file at /<debugfs-root>/dri/0/DSI-1/ for DSI-1 connector. Format for DSI command transfer: echo "command bytes" > /<debugfs-root/dri/0/DSI-1/rx_cmd byte-0: the length of received buffer byte-1: data-type byte-2: last command. always 0x01 byte-3: channel number byte-4: flags. MIPI_DSI_MSG_*, must be set to 0xa byte-5: 0x00 byte-6 and byte-7: command payload length byte-8 to byte-[8+payload length]: command payload Example: echo "0x01 0x06 0x01 0x00 0x0a 0x00 0x00 0x01 0x0a" > rx_cmd The command receive operations are allowed only if controller (ex. DSI controller) is in active state. Read the value of panel response: cat /<debugfs-root>/dri/0/DSI-1/rx_cmd returns the value of this command. nothing - failure, xx xx - success. Change-Id: I912b65d606e248c7a886d219f4363bf7766ee7b6 Signed-off-by: Yuan Zhao <yzhao@codeaurora.org>