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video: Provide a signal when a new console line is started

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When we start a new line (due to the user pressing return), signal this to
the driver so that it can flush its buffer of character positions.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass
2016-01-14 18:10:40 -07:00
committed by Anatolij Gustschin
parent c5b77d01d1
commit 58c733a70f
2 changed files with 28 additions and 0 deletions
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14
include/video_console.h
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@@ -28,6 +28,7 @@
* @tab_width_frac: Tab width in fractional units
* @xsize_frac: Width of the display in fractional units
* @xstart_frac: Left margin for the text console in fractional units
* @last_ch: Last character written to the text console on this line
*/
struct vidconsole_priv {
struct stdio_dev sdev;
@@ -40,6 +41,7 @@ struct vidconsole_priv {
int tab_width_frac;
int xsize_frac;
int xstart_frac;
int last_ch;
};
/**
@@ -87,6 +89,18 @@ struct vidconsole_ops {
* @return 0 if OK, -ve on error
*/
int (*set_row)(struct udevice *dev, uint row, int clr);
/**
* entry_start() - Indicate that text entry is starting afresh
*
* Consoles which use proportional fonts need to track the position of
* each character output so that backspace will return to the correct
* place. This method signals to the console driver that a new entry
* line is being start (e.g. the user pressed return to start a new
* command). The driver can use this signal to empty its list of
* positions.
*/
int (*entry_start)(struct udevice *dev);
};
/* Get a pointer to the driver operations for a video console device */