Add necessary support for flipping the hsync signal and shifting
the display to the right by a certain number of pixels. Changes
only take effect if adjusted_mode is changed in fixup function.
Signed-off-by: Darren Etheridge <detheri...@ti.com>
---
drivers/gpu/drm/i2c/tda998x_drv.c | 10 ++++++++++
1 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/drivers/gpu/drm/i2c/tda998x_drv.c
b/drivers/gpu/drm/i2c/tda998x_drv.c
index e384b59..ad870e6 100644
--- a/drivers/gpu/drm/i2c/tda998x_drv.c
+++ b/drivers/gpu/drm/i2c/tda998x_drv.c
@@ -778,6 +778,16 @@ tda998x_encoder_mode_set(struct drm_encoder *encoder,
n_line = mode->vtotal;
ref_pix = 3 + mode->hsync_start - mode->hdisplay;
+
+ /*
+ * handle issue on TILCDC where it is outputing
+ * non-VESA compliant sync signals the workaround
+ * forces us to invert the HSYNC, so need to adjust display to
+ * the left by hskew pixels, provided by the tilcdc driver
+ */
+ if (adjusted_mode->flags & DRM_MODE_FLAG_HSKEW)
+ ref_pix += adjusted_mode->hskew;
+
de_pix_s = mode->htotal - mode->hdisplay;
de_pix_e = de_pix_s + mode->hdisplay;
hs_pix_s = mode->hsync_start - mode->hdisplay;
--
1.7.0.4
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/dri-devel
