Merge tag 'drm-misc-next-2022-09-23' of git://anongit.freedesktop.org/drm/drm-misc into drm-next

drm-misc-next for 6.1:

UAPI Changes:

Cross-subsystem Changes:
  - dma-buf: Improve signaling when debugging

Core Changes:
  - Backlight handling improvements
  - format-helper: Add drm_fb_build_fourcc_list()
  - fourcc: Kunit tests improvements
  - modes: Add DRM_MODE_INIT() macro
  - plane: Remove drm_plane_init(), Allocate planes with drm_universal_plane_alloc()
  - plane-helper: Add drm_plane_helper_atomic_check()
  - probe-helper: Add drm_connector_helper_get_modes_fixed() and
    drm_crtc_helper_mode_valid_fixed()
  - tests: Conversion to parametrized tests, test name consistency

Driver Changes:
  - amdgpu: Fix for a VRAM eviction issue
  - ast: Resolution handling improvements
  - mediatek: small code improvements for DP
  - omap: Refcounting fix, small improvements
  - rockchip: RK3568 support, Gamma support for RK3399
  - sun4i: Build failure fix when !OF
  - udl: Multiple fixes here and there
  - vc4: HDMI hotplug handling improvements
  - vkms: Warning fix

Signed-off-by: Dave Airlie <airlied@redhat.com>

From: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20220923073943.d43tne5hni3iknlv@houat

1 files changed, 64 insertions, 0 deletions

diff --git a/drivers/gpu/drm/drm_probe_helper.c b/drivers/gpu/drm/drm_probe_helper.c
index bb427c5a4f1f..69b0b2b9cc1c 100644
--- a/drivers/gpu/drm/drm_probe_helper.c
+++ b/drivers/gpu/drm/drm_probe_helper.c
@@ -1015,6 +1015,30 @@ bool drm_helper_hpd_irq_event(struct drm_device *dev)
 EXPORT_SYMBOL(drm_helper_hpd_irq_event);
 
 /**
+ * drm_crtc_helper_mode_valid_fixed - Validates a display mode
+ * @crtc: the crtc
+ * @mode: the mode to validate
+ * @fixed_mode: the display hardware's mode
+ *
+ * Returns:
+ * MODE_OK on success, or another mode-status code otherwise.
+ */
+enum drm_mode_status drm_crtc_helper_mode_valid_fixed(struct drm_crtc *crtc,
+						      const struct drm_display_mode *mode,
+						      const struct drm_display_mode *fixed_mode)
+{
+	if (mode->hdisplay != fixed_mode->hdisplay && mode->vdisplay != fixed_mode->vdisplay)
+		return MODE_ONE_SIZE;
+	else if (mode->hdisplay != fixed_mode->hdisplay)
+		return MODE_ONE_WIDTH;
+	else if (mode->vdisplay != fixed_mode->vdisplay)
+		return MODE_ONE_HEIGHT;
+
+	return MODE_OK;
+}
+EXPORT_SYMBOL(drm_crtc_helper_mode_valid_fixed);
+
+/**
  * drm_connector_helper_get_modes_from_ddc - Updates the connector's EDID
  *                                           property from the connector's
  *                                           DDC channel
@@ -1051,6 +1075,46 @@ int drm_connector_helper_get_modes_from_ddc(struct drm_connector *connector)
 EXPORT_SYMBOL(drm_connector_helper_get_modes_from_ddc);
 
 /**
+ * drm_connector_helper_get_modes_fixed - Duplicates a display mode for a connector
+ * @connector: the connector
+ * @fixed_mode: the display hardware's mode
+ *
+ * This function duplicates a display modes for a connector. Drivers for hardware
+ * that only supports a single fixed mode can use this function in their connector's
+ * get_modes helper.
+ *
+ * Returns:
+ * The number of created modes.
+ */
+int drm_connector_helper_get_modes_fixed(struct drm_connector *connector,
+					 const struct drm_display_mode *fixed_mode)
+{
+	struct drm_device *dev = connector->dev;
+	struct drm_display_mode *mode;
+
+	mode = drm_mode_duplicate(dev, fixed_mode);
+	if (!mode) {
+		drm_err(dev, "Failed to duplicate mode " DRM_MODE_FMT "\n",
+			DRM_MODE_ARG(fixed_mode));
+		return 0;
+	}
+
+	if (mode->name[0] == '\0')
+		drm_mode_set_name(mode);
+
+	mode->type |= DRM_MODE_TYPE_PREFERRED;
+	drm_mode_probed_add(connector, mode);
+
+	if (mode->width_mm)
+		connector->display_info.width_mm = mode->width_mm;
+	if (mode->height_mm)
+		connector->display_info.height_mm = mode->height_mm;
+
+	return 1;
+}
+EXPORT_SYMBOL(drm_connector_helper_get_modes_fixed);
+
+/**
  * drm_connector_helper_get_modes - Read EDID and update connector.
  * @connector: The connector
  *