drm: Add drm_{crtc/encoder/connector}_mode_valid()

Add a new helper to call crtc->mode_valid, connector->mode_valid
and encoder->mode_valid callbacks.

Suggested-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jose Abreu <joabreu@synopsys.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
Cc: Carlos Palminha <palminha@synopsys.com>
Cc: Dave Airlie <airlied@linux.ie>
Changes v2->v3:
	- Move helpers to drm_probe_helper.c (Daniel)
	- Squeeze patches that introduce helpers into a single
	one (Daniel)

Signed-off-by: Jose Abreu <joabreu@synopsys.com>
[danvet: Make it compile when CONFIG_DRM_DP_AUX_CHARDEV is selected.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/b55c8bd029da219ff04e39086025c115731a49b1.1495720737.git.joabreu@synopsys.com

diff --git a/drivers/gpu/drm/drm_crtc_helper_internal.h b/drivers/gpu/drm/drm_crtc_helper_internal.h
index 28295e5..b5ac158 100644 (file)
--- a/drivers/gpu/drm/drm_crtc_helper_internal.h
+++ b/drivers/gpu/drm/drm_crtc_helper_internal.h
@@ -26,7 +26,11 @@
  * implementation details and are not exported to drivers.
  */
 
+#include <drm/drm_connector.h>
+#include <drm/drm_crtc.h>
 #include <drm/drm_dp_helper.h>
+#include <drm/drm_encoder.h>
+#include <drm/drm_modes.h>
 
 /* drm_fb_helper.c */
 #ifdef CONFIG_DRM_FBDEV_EMULATION
@@ -63,3 +67,11 @@ static inline void drm_dp_aux_unregister_devnode(struct drm_dp_aux *aux)
 {
 }
 #endif
+
+/* drm_probe_helper.c */
+enum drm_mode_status drm_crtc_mode_valid(struct drm_crtc *crtc,
+                                        const struct drm_display_mode *mode);
+enum drm_mode_status drm_encoder_mode_valid(struct drm_encoder *encoder,
+                                           const struct drm_display_mode *mode);
+enum drm_mode_status drm_connector_mode_valid(struct drm_connector *connector,
+                                             struct drm_display_mode *mode);

diff --git a/drivers/gpu/drm/drm_probe_helper.c b/drivers/gpu/drm/drm_probe_helper.c
index 1b0c14a..f01abdc 100644 (file)
--- a/drivers/gpu/drm/drm_probe_helper.c
+++ b/drivers/gpu/drm/drm_probe_helper.c
@@ -38,6 +38,9 @@
 #include <drm/drm_crtc_helper.h>
 #include <drm/drm_fb_helper.h>
 #include <drm/drm_edid.h>
+#include <drm/drm_modeset_helper_vtables.h>
+
+#include "drm_crtc_helper_internal.h"
 
 /**
  * DOC: output probing helper overview
@@ -113,6 +116,41 @@ static int drm_helper_probe_add_cmdline_mode(struct drm_connector *connector)
        return 1;
 }
 
+enum drm_mode_status drm_crtc_mode_valid(struct drm_crtc *crtc,
+                                        const struct drm_display_mode *mode)
+{
+       const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
+
+       if (!crtc_funcs || !crtc_funcs->mode_valid)
+               return MODE_OK;
+
+       return crtc_funcs->mode_valid(crtc, mode);
+}
+
+enum drm_mode_status drm_encoder_mode_valid(struct drm_encoder *encoder,
+                                           const struct drm_display_mode *mode)
+{
+       const struct drm_encoder_helper_funcs *encoder_funcs =
+               encoder->helper_private;
+
+       if (!encoder_funcs || !encoder_funcs->mode_valid)
+               return MODE_OK;
+
+       return encoder_funcs->mode_valid(encoder, mode);
+}
+
+enum drm_mode_status drm_connector_mode_valid(struct drm_connector *connector,
+                                             struct drm_display_mode *mode)
+{
+       const struct drm_connector_helper_funcs *connector_funcs =
+               connector->helper_private;
+
+       if (!connector_funcs || !connector_funcs->mode_valid)
+               return MODE_OK;
+
+       return connector_funcs->mode_valid(connector, mode);
+}
+
 #define DRM_OUTPUT_POLL_PERIOD (10*HZ)
 /**
  * drm_kms_helper_poll_enable - re-enable output polling.