From: Ville Syrjälä <ville.syrj...@linux.intel.com>
Make mode matching less confusing by allowing the caller to specify
which parts of the modes should match via some flags.
Signed-off-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
Reviewed-by: Shashank Sharma <shashank.sha...@intel.com>
---
drivers/gpu/drm/drm_modes.c | 134 ++++++++++++++++++++++++++++++++++----------
include/drm/drm_modes.h | 9 +++
2 files changed, 112 insertions(+), 31 deletions(-)
diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c
index e82b61e..c395a24 100644
--- a/drivers/gpu/drm/drm_modes.c
+++ b/drivers/gpu/drm/drm_modes.c
@@ -939,17 +939,68 @@ struct drm_display_mode *drm_mode_duplicate(struct
drm_device *dev,
}
EXPORT_SYMBOL(drm_mode_duplicate);
+static bool drm_mode_match_timings(const struct drm_display_mode *mode1,
+ const struct drm_display_mode *mode2)
+{
+ return mode1->hdisplay == mode2->hdisplay &&
+ mode1->hsync_start == mode2->hsync_start &&
+ mode1->hsync_end == mode2->hsync_end &&
+ mode1->htotal == mode2->htotal &&
+ mode1->hskew == mode2->hskew &&
+ mode1->vdisplay == mode2->vdisplay &&
+ mode1->vsync_start == mode2->vsync_start &&
+ mode1->vsync_end == mode2->vsync_end &&
+ mode1->vtotal == mode2->vtotal &&
+ mode1->vscan == mode2->vscan;
+}
+
+static bool drm_mode_match_clock(const struct drm_display_mode *mode1,
+ const struct drm_display_mode *mode2)
+{
+ /*
+ * do clock check convert to PICOS
+ * so fb modes get matched the same
+ */
+ if (mode1->clock && mode2->clock)
+ return KHZ2PICOS(mode1->clock) == KHZ2PICOS(mode2->clock);
+ else
+ return mode1->clock == mode2->clock;
+}
+
+static bool drm_mode_match_flags(const struct drm_display_mode *mode1,
+ const struct drm_display_mode *mode2)
+{
+ return (mode1->flags & ~DRM_MODE_FLAG_3D_MASK) ==
+ (mode2->flags & ~DRM_MODE_FLAG_3D_MASK);
+}
+
+static bool drm_mode_match_3d_flags(const struct drm_display_mode *mode1,
+ const struct drm_display_mode *mode2)
+{
+ return (mode1->flags & DRM_MODE_FLAG_3D_MASK) ==
+ (mode2->flags & DRM_MODE_FLAG_3D_MASK);
+}
+
+static bool drm_mode_match_aspect_ratio(const struct drm_display_mode *mode1,
+ const struct drm_display_mode *mode2)
+{
+ return mode1->picture_aspect_ratio == mode2->picture_aspect_ratio;
+}
+
/**
- * drm_mode_equal - test modes for equality
+ * drm_mode_match - test modes for (partial) equality
* @mode1: first mode
* @mode2: second mode
+ * @match_flags: which parts need to match (DRM_MODE_MATCH_*)
*
* Check to see if @mode1 and @mode2 are equivalent.
*
* Returns:
- * True if the modes are equal, false otherwise.
+ * True if the modes are (partially) equal, false otherwise.
*/
-bool drm_mode_equal(const struct drm_display_mode *mode1, const struct
drm_display_mode *mode2)
+bool drm_mode_match(const struct drm_display_mode *mode1,
+ const struct drm_display_mode *mode2,
+ unsigned int match_flags)
{
if (!mode1 && !mode2)
return true;
@@ -957,15 +1008,48 @@ bool drm_mode_equal(const struct drm_display_mode
*mode1, const struct drm_displ
if (!mode1 || !mode2)
return false;
- /* do clock check convert to PICOS so fb modes get matched
- * the same */
- if (mode1->clock && mode2->clock) {
- if (KHZ2PICOS(mode1->clock) != KHZ2PICOS(mode2->clock))
- return false;
- } else if (mode1->clock != mode2->clock)
+ if (match_flags & DRM_MODE_MATCH_TIMINGS &&
+ !drm_mode_match_timings(mode1, mode2))
return false;
- return drm_mode_equal_no_clocks(mode1, mode2);
+ if (match_flags & DRM_MODE_MATCH_CLOCK &&
+ !drm_mode_match_clock(mode1, mode2))
+ return false;
+
+ if (match_flags & DRM_MODE_MATCH_FLAGS &&
+ !drm_mode_match_flags(mode1, mode2))
+ return false;
+
+ if (match_flags & DRM_MODE_MATCH_3D_FLAGS &&
+ !drm_mode_match_3d_flags(mode1, mode2))
+ return false;
+
+ if (match_flags & DRM_MODE_MATCH_ASPECT_RATIO &&
+ !drm_mode_match_aspect_ratio(mode1, mode2))
+ return false;
+
+ return true;
+}
+EXPORT_SYMBOL(drm_mode_match);
+
+/**
+ * drm_mode_equal - test modes for equality
+ * @mode1: first mode
+ * @mode2: second mode
+ *
+ * Check to see if @mode1 and @mode2 are equivalent.
+ *
+ * Returns:
+ * True if the modes are equal, false otherwise.
+ */
+bool drm_mode_equal(const struct drm_display_mode *mode1,
+ const struct drm_display_mode *mode2)
+{
+ return drm_mode_match(mode1, mode2,
+ DRM_MODE_MATCH_TIMINGS |
+ DRM_MODE_MATCH_CLOCK |
+ DRM_MODE_MATCH_FLAGS |
+ DRM_MODE_MATCH_3D_FLAGS);
}
EXPORT_SYMBOL(drm_mode_equal);
@@ -980,13 +1064,13 @@ EXPORT_SYMBOL(drm_mode_equal);
* 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)
+bool drm_mode_equal_no_clocks(const struct drm_display_mode *mode1,
+ const struct drm_display_mode *mode2)
{
- if ((mode1->flags & DRM_MODE_FLAG_3D_MASK) !=
- (mode2->flags & DRM_MODE_FLAG_3D_MASK))
- return false;
-
- return drm_mode_equal_no_clocks_no_stereo(mode1, mode2);
+ return drm_mode_match(mode1, mode2,
+ DRM_MODE_MATCH_TIMINGS |
+ DRM_MODE_MATCH_FLAGS |
+ DRM_MODE_MATCH_3D_FLAGS);
}
EXPORT_SYMBOL(drm_mode_equal_no_clocks);
@@ -1004,21 +1088,9 @@ EXPORT_SYMBOL(drm_mode_equal_no_clocks);
bool drm_mode_equal_no_clocks_no_stereo(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 &&
- mode1->htotal == mode2->htotal &&
- mode1->hskew == mode2->hskew &&
- mode1->vdisplay == mode2->vdisplay &&
- mode1->vsync_start == mode2->vsync_start &&
- mode1->vsync_end == mode2->vsync_end &&
- mode1->vtotal == mode2->vtotal &&
- mode1->vscan == mode2->vscan &&
- (mode1->flags & ~DRM_MODE_FLAG_3D_MASK) ==
- (mode2->flags & ~DRM_MODE_FLAG_3D_MASK))
- return true;
-
- return false;
+ return drm_mode_match(mode1, mode2,
+ DRM_MODE_MATCH_TIMINGS |
+ DRM_MODE_MATCH_FLAGS);
}
EXPORT_SYMBOL(drm_mode_equal_no_clocks_no_stereo);
diff --git a/include/drm/drm_modes.h b/include/drm/drm_modes.h
index 0d310be..2f78b7e 100644
--- a/include/drm/drm_modes.h
+++ b/include/drm/drm_modes.h
@@ -147,6 +147,12 @@ enum drm_mode_status {
#define DRM_MODE_FLAG_3D_MAX DRM_MODE_FLAG_3D_SIDE_BY_SIDE_HALF
+#define DRM_MODE_MATCH_TIMINGS (1 << 0)
+#define DRM_MODE_MATCH_CLOCK (1 << 1)
+#define DRM_MODE_MATCH_FLAGS (1 << 2)
+#define DRM_MODE_MATCH_3D_FLAGS (1 << 3)
+#define DRM_MODE_MATCH_ASPECT_RATIO (1 << 4)
+
/**
* struct drm_display_mode - DRM kernel-internal display mode structure
* @hdisplay: horizontal display size
@@ -490,6 +496,9 @@ void drm_mode_copy(struct drm_display_mode *dst,
const struct drm_display_mode *src);
struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev,
const struct drm_display_mode
*mode);
+bool drm_mode_match(const struct drm_display_mode *mode1,
+ const struct drm_display_mode *mode2,
+ unsigned int match_flags);
bool drm_mode_equal(const struct drm_display_mode *mode1,
const struct drm_display_mode *mode2);
bool drm_mode_equal_no_clocks(const struct drm_display_mode *mode1,
--
2.7.4
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