Adding two APIs for panel-taal: check_timings and set_timings

These are required by omapfb in case we wish to set default mode through 
bootargs.
e.g.: omapfb.mode="lcd:640x480-16" (display device:width X height - bits per 
pixel)

omapfb_set_def_mode function in omapfb-main.c essentially needs these functions
otherwise it would return -EINVAL and default mode sent through bootargs
would be ignored.

Signed-off-by: Mayuresh Janorkar <ma...@ti.com>
---
 drivers/video/omap2/displays/panel-taal.c |   27 +++++++++++++++++++++++++++
 1 files changed, 27 insertions(+), 0 deletions(-)

diff --git a/drivers/video/omap2/displays/panel-taal.c 
b/drivers/video/omap2/displays/panel-taal.c
index e1c765d..0bb2c30 100644
--- a/drivers/video/omap2/displays/panel-taal.c
+++ b/drivers/video/omap2/displays/panel-taal.c
@@ -476,6 +476,31 @@ static void taal_get_timings(struct omap_dss_device 
*dssdev,
        *timings = dssdev->panel.timings;
 }
 
+static void taal_set_timings(struct omap_dss_device *dssdev,
+                       struct omap_video_timings *timings)
+{
+       /*
+        * TAAL panel's timing struct has only x_res and y_res
+        * other timing parameters are not set
+        */
+       dssdev->panel.timings.x_res = timings->x_res;
+       dssdev->panel.timings.y_res = timings->y_res;
+}
+
+static int taal_check_timings(struct omap_dss_device *dssdev,
+                       struct omap_video_timings *timings)
+{
+       /*
+        * TAAL panel's timing struct has only x_res and y_res
+        * other timing parameters are not set
+        */
+       if (!timings || timings->x_res != dssdev->panel.timings.x_res ||
+               timings->y_res != dssdev->panel.timings.y_res)
+               return -EINVAL;
+
+       return 0;
+}
+
 static void taal_get_resolution(struct omap_dss_device *dssdev,
                u16 *xres, u16 *yres)
 {
@@ -1563,6 +1588,8 @@ static struct omap_dss_driver taal_driver = {
        .memory_read    = taal_memory_read,
 
        .get_timings    = taal_get_timings,
+       .set_timings    = taal_set_timings,
+       .check_timings  = taal_check_timings,
 
        .driver         = {
                .name   = "taal",
-- 
1.7.0.4

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