Add support for mode_fixup for the tidss CRTC.

Some bridges like the cdns-dsi consume the crtc_* timing parameters for
programming the blanking values. Allow for the normal timing parameters
to get copied to crtc_* timing params.

Signed-off-by: Aradhya Bhatia <a-bhat...@ti.com>
---
 drivers/gpu/drm/tidss/tidss_crtc.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/gpu/drm/tidss/tidss_crtc.c 
b/drivers/gpu/drm/tidss/tidss_crtc.c
index 94f8e3178df5..797ef53d9ad2 100644
--- a/drivers/gpu/drm/tidss/tidss_crtc.c
+++ b/drivers/gpu/drm/tidss/tidss_crtc.c
@@ -309,12 +309,23 @@ enum drm_mode_status tidss_crtc_mode_valid(struct 
drm_crtc *crtc,
        return dispc_vp_mode_valid(tidss->dispc, tcrtc->hw_videoport, mode);
 }
 
+static
+bool tidss_crtc_mode_fixup(struct drm_crtc *crtc,
+                          const struct drm_display_mode *mode,
+                          struct drm_display_mode *adjusted_mode)
+{
+       drm_mode_set_crtcinfo(adjusted_mode, 0);
+
+       return true;
+}
+
 static const struct drm_crtc_helper_funcs tidss_crtc_helper_funcs = {
        .atomic_check = tidss_crtc_atomic_check,
        .atomic_flush = tidss_crtc_atomic_flush,
        .atomic_enable = tidss_crtc_atomic_enable,
        .atomic_disable = tidss_crtc_atomic_disable,
 
+       .mode_fixup = tidss_crtc_mode_fixup,
        .mode_valid = tidss_crtc_mode_valid,
 };
 
-- 
2.34.1

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