[PATCH 06/12] drm/i915: Add a constant and function for getting the Displayport compliance failsafe video mode

[Todd Previte <tprevite@gmail.com>]

Adds the failsafe mode (640x480@60hz) as a constant and a function that retrieves it. These are
designed for use in Displayport compliance testing only and should not be used outside that
context.

Signed-off-by: Todd Previte <tprevite@gmail.com>
---
 drivers/gpu/drm/i915/intel_dp.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 6c8f222..33b6dc9 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -82,6 +82,18 @@ static const struct dp_link_dpll chv_dpll[] = {
 		{ .p1 = 2, .p2 = 1, .n = 1, .m1 = 2, .m2 = 0x6c00000 } }
 };
 
+/* VESA 640x480@60Hz - DP compliance failsafe mode */
+static struct drm_display_mode dp_failsafe_mode = {
+	DRM_MODE("640x480", DRM_MODE_TYPE_DRIVER, 25200, 640, 664, 752,
+			 800, 0, 480, 490, 492, 525, 0,
+			 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC)
+};
+
+struct drm_display_mode *intel_dp_get_failsafe_mode(void)
+{
+       return &dp_failsafe_mode;
+}
+
 /**
  * is_edp - is the given port attached to an eDP panel (either CPU or PCH)
  * @intel_dp: DP struct
-- 
1.9.1