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 detheridge@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;