From: José Roberto de Souza <[email protected]>

Same as for_each_oldnew_intel_crtc_in_state() but iterates in reverse
order.

v2: Fix additional blank line

Cc: Rodrigo Vivi <[email protected]>
Cc: Ville Syrjälä <[email protected]>
Signed-off-by: José Roberto de Souza <[email protected]>
Signed-off-by: Lucas De Marchi <[email protected]>
---
 drivers/gpu/drm/i915/display/intel_display.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_display.h 
b/drivers/gpu/drm/i915/display/intel_display.h
index fd3043e77b50..b63fb7a4599e 100644
--- a/drivers/gpu/drm/i915/display/intel_display.h
+++ b/drivers/gpu/drm/i915/display/intel_display.h
@@ -419,6 +419,15 @@ enum phy_fia {
                             ((connector) = 
to_intel_connector((__state)->base.connectors[__i].ptr), \
                             (new_connector_state) = 
to_intel_digital_connector_state((__state)->base.connectors[__i].new_state), 1))
 
+#define for_each_oldnew_intel_crtc_in_state_reverse(__state, crtc, 
old_crtc_state, new_crtc_state, __i) \
+       for ((__i) = (__state)->base.dev->mode_config.num_crtc - 1; \
+            (__i) >= 0  && \
+            ((crtc) = to_intel_crtc((__state)->base.crtcs[__i].ptr), \
+             (old_crtc_state) = 
to_intel_crtc_state((__state)->base.crtcs[__i].old_state), \
+             (new_crtc_state) = 
to_intel_crtc_state((__state)->base.crtcs[__i].new_state), 1); \
+            (__i)--) \
+               for_each_if(crtc)
+
 void intel_link_compute_m_n(u16 bpp, int nlanes,
                            int pixel_clock, int link_clock,
                            struct intel_link_m_n *m_n,
-- 
2.21.0

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