root@localhost:~# echo "0x01 0xDA" > /sys/kernel/debug/tegra_dsi/read_panel
[  209.457783] tegradc 15200000.nvdisplay: max ret payload size:0x1
[  209.457783] panel reg addr:0xda

root@localhost:~# cat /sys/kernel/debug/tegra_dsi/read_panel
[  226.217091] tegradc 15200000.nvdisplay: tegra_dsi_set_to_lp_mode 4
[  226.223354] tegradc 15200000.nvdisplay: tegra_dsi_set_to_lp_mode 5
[  226.241945] tegradc 15200000.nvdisplay: tegra_dsi_set_to_lp_mode 6
[  226.248238] tegradc 15200000.nvdisplay: tegra_dsi_set_to_lp_mode 7
[  226.254432] tegradc 15200000.nvdisplay: tegra_dsi_set_control_reg_lp
[  226.260794] tegradc 15200000.nvdisplay: tegra_dsi_set_to_lp_mode 8
[  226.266975] tegradc 15200000.nvdisplay: tegra_dsi_set_to_lp_mode 9
[  226.273177] tegradc 15200000.nvdisplay: tegra_dsi_read_data 1 dsi_status:400 dsi_control:3031
[  226.281722] tegradc 15200000.nvdisplay: tegra_dsi_syncpt 7e dsi->syncpt_val+1:e0 syncpt_id:b syncpt:0
[  226.290940] tegradc 15200000.nvdisplay: tegra_dsi_set_to_lp_mode 4
[  226.297124] tegradc 15200000.nvdisplay: tegra_dsi_set_to_lp_mode 5
[  226.315712] tegradc 15200000.nvdisplay: tegra_dsi_set_to_lp_mode 6
[  226.321907] tegradc 15200000.nvdisplay: tegra_dsi_set_to_lp_mode 7
[  226.328090] tegradc 15200000.nvdisplay: tegra_dsi_set_control_reg_lp
[  226.334450] tegradc 15200000.nvdisplay: tegra_dsi_set_to_lp_mode 8
[  226.340629] tegradc 15200000.nvdisplay: tegra_dsi_set_to_lp_mode 9
[  226.346866] tegradc 15200000.nvdisplay: tegra_dsi_read_data 2 dsi_status:400 dsi_control:3031
[  226.355401] tegradc 15200000.nvdisplay: tegra_dsi_bta 1 !!!!!!
[  226.361240] tegradc 15200000.nvdisplay: tegra_dsi_bta 2
[  226.585069] tegradc 15200000.nvdisplay: tegra_dsi_syncpt 7e dsi->syncpt_val+1:e1 syncpt_id:b syncpt:0
[  226.594469] tegradc 15200000.nvdisplay: tegra_dsi_bta 5
[  226.599769] tegradc 15200000.nvdisplay: tegra_dsi_bta end
[  226.605239] tegradc 15200000.nvdisplay: tegra_dsi_read_data 3 dsi_control:3031
[  226.617570] tegradc 15200000.nvdisplay: DSI RD_FIFO_CNT is zero (RD_DATA=0 dsi_status=0x400)
[  226.626045] tegradc 15200000.nvdisplay: DSI read fifo failure
max ret payload size:0x1
panel reg addr:0xda

 Read data[0]  0  0  0  0 
Invalid read response
Invalid response packet
root@squeaky-lemur-protoa:~#