AUO-K190x: Use correct line length

Previously all functions that used the line length used xres directly,
thus hardcoding a 8bits per pixel value.

This patch calculates the correct line length according to the actual
bits per pixel value and changes all line length users to use the
calculated line length value.

Signed-off-by: Heiko Stübner <heiko@sntech.de>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/video/auo_k1901fb.c b/drivers/video/auo_k1901fb.c
index d1db1653cd88..9efbe2763447 100644
--- a/drivers/video/auo_k1901fb.c
+++ b/drivers/video/auo_k1901fb.c
@@ -121,6 +121,7 @@ static void auok1901_update_region(struct auok190xfb_par *par, int mode,
         struct device *dev = par->info->device;
         unsigned char *buf = (unsigned char *)par->info->screen_base;
         int xres = par->info->var.xres;
+        int line_length = par->info->fix.line_length;
         u16 args[5];
 
         pm_runtime_get_sync(dev);
@@ -139,9 +140,9 @@ static void auok1901_update_region(struct auok190xfb_par *par, int mode,
         args[1] = y1 + 1;
         args[2] = xres;
         args[3] = y2 - y1;
-        buf += y1 * xres;
+        buf += y1 * line_length;
         auok190x_send_cmdargs_pixels_nowait(par, AUOK1901_CMD_DMA_START, 4,
-                                            args, ((y2 - y1) * xres)/2,
+                                            args, ((y2 - y1) * line_length)/2,
                                             (u16 *) buf);
         auok190x_send_command_nowait(par, AUOK190X_CMD_DATA_STOP);