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OMAP: DSS2: DSI: add dsi_vc_dcs_read_2() helper

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Add dsi_vc_dcs_read_2() helper function to read two bytes from the DSI
peripheral.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@nokia.com>
This commit is contained in:
Tomi Valkeinen 2010-02-25 11:38:13 +02:00
parent ddbfeb396e
commit 53055aae20
2 changed files with 17 additions and 0 deletions
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1
arch/arm/plat-omap/include/plat/display.h
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@ -238,6 +238,7 @@ int dsi_vc_dcs_write_1(int channel, u8 dcs_cmd, u8 param);
int dsi_vc_dcs_write_nosync(int channel, u8 *data, int len);
int dsi_vc_dcs_read(int channel, u8 dcs_cmd, u8 *buf, int buflen);
int dsi_vc_dcs_read_1(int channel, u8 dcs_cmd, u8 *data);
int dsi_vc_dcs_read_2(int channel, u8 dcs_cmd, u16 *data);
int dsi_vc_set_max_rx_packet_size(int channel, u16 len);
int dsi_vc_send_null(int channel);
int dsi_vc_send_bta_sync(int channel);

16
drivers/video/omap2/dss/dsi.c
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@ -2212,6 +2212,22 @@ int dsi_vc_dcs_read_1(int channel, u8 dcs_cmd, u8 *data)
}
EXPORT_SYMBOL(dsi_vc_dcs_read_1);
int dsi_vc_dcs_read_2(int channel, u8 dcs_cmd, u16 *data)
{
int r;
r = dsi_vc_dcs_read(channel, dcs_cmd, (u8 *)data, 2);
if (r < 0)
return r;
if (r != 2)
return -EIO;
return 0;
}
EXPORT_SYMBOL(dsi_vc_dcs_read_2);
int dsi_vc_set_max_rx_packet_size(int channel, u16 len)
{
int r;