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-rw-r--r--drivers/gpu/drm/drm_modes.c22
-rw-r--r--include/drm/drm_crtc.h1
2 files changed, 22 insertions, 1 deletions
diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c
index 04fa6f1808d1..f264d08062f0 100644
--- a/drivers/gpu/drm/drm_modes.c
+++ b/drivers/gpu/drm/drm_modes.c
@@ -848,6 +848,26 @@ bool drm_mode_equal(const struct drm_display_mode *mode1, const struct drm_displ
} else if (mode1->clock != mode2->clock)
return false;
+ return drm_mode_equal_no_clocks(mode1, mode2);
+}
+EXPORT_SYMBOL(drm_mode_equal);
+
+/**
+ * drm_mode_equal_no_clocks - test modes for equality
+ * @mode1: first mode
+ * @mode2: second mode
+ *
+ * LOCKING:
+ * None.
+ *
+ * Check to see if @mode1 and @mode2 are equivalent, but
+ * don't check the pixel clocks.
+ *
+ * RETURNS:
+ * True if the modes are equal, false otherwise.
+ */
+bool drm_mode_equal_no_clocks(const struct drm_display_mode *mode1, const struct drm_display_mode *mode2)
+{
if (mode1->hdisplay == mode2->hdisplay &&
mode1->hsync_start == mode2->hsync_start &&
mode1->hsync_end == mode2->hsync_end &&
@@ -863,7 +883,7 @@ bool drm_mode_equal(const struct drm_display_mode *mode1, const struct drm_displ
return false;
}
-EXPORT_SYMBOL(drm_mode_equal);
+EXPORT_SYMBOL(drm_mode_equal_no_clocks);
/**
* drm_mode_validate_size - make sure modes adhere to size constraints
diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h
index b85575bb82e6..836438dfb331 100644
--- a/include/drm/drm_crtc.h
+++ b/include/drm/drm_crtc.h
@@ -922,6 +922,7 @@ extern void drm_mode_config_reset(struct drm_device *dev);
extern void drm_mode_config_cleanup(struct drm_device *dev);
extern void drm_mode_set_name(struct drm_display_mode *mode);
extern bool drm_mode_equal(const struct drm_display_mode *mode1, const struct drm_display_mode *mode2);
+extern bool drm_mode_equal_no_clocks(const struct drm_display_mode *mode1, const struct drm_display_mode *mode2);
extern int drm_mode_width(const struct drm_display_mode *mode);
extern int drm_mode_height(const struct drm_display_mode *mode);