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display: Add fifo draining before requesting info

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In case we got loaded from bad chainloader.
Fixes issues with incorrect display ID when fifo has left overs.
This commit is contained in:
CTCaer 2020-12-28 05:23:33 +02:00
parent d0d943c9c3
commit e4bc5c41ce
1 changed files with 4 additions and 1 deletions
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5
bdk/display/di.c
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@ -339,9 +339,12 @@ void display_init()
#if 0
// Get Display ID.
_display_id = 0xCCCCCC;
_display_id = 0xCCCCCC; // Set initial value. 4th byte cleared.
display_dsi_read(MIPI_DCS_GET_DISPLAY_ID, 3, &_display_id, DSI_VIDEO_DISABLED);
#else
// Drain RX FIFO.
_display_dsi_read_rx_fifo(NULL);
// Set reply size.
_display_dsi_send_cmd(MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE, 3, 0);
_display_dsi_wait(250000, _DSIREG(DSI_TRIGGER), DSI_TRIGGER_HOST | DSI_TRIGGER_VIDEO);