The encoder possible_crtcs mask identifies which CRTCs can be bound to
a particular encoder. Each bit from bit 0 defines an index in the list
of CRTCs held in the DRM mode_config crtc_list. Rather than having
drivers trying to track the position of their CRTCs in the list, expose
the code which already exists for calculating the appropriate mask bit
for a CRTC.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Reviewed-by: David Herrmann <dh.herrmann@gmail.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
[treding@nvidia.com: add drm_crtc_index(), move to core]
Signed-off-by: Thierry Reding <treding@nvidia.com>
}
EXPORT_SYMBOL(drm_crtc_cleanup);
}
EXPORT_SYMBOL(drm_crtc_cleanup);
+/**
+ * drm_crtc_index - find the index of a registered CRTC
+ * @crtc: CRTC to find index for
+ *
+ * Given a registered CRTC, return the index of that CRTC within a DRM
+ * device's list of CRTCs.
+ */
+unsigned int drm_crtc_index(struct drm_crtc *crtc)
+{
+ unsigned int index = 0;
+ struct drm_crtc *tmp;
+
+ list_for_each_entry(tmp, &crtc->dev->mode_config.crtc_list, head) {
+ if (tmp == crtc)
+ return index;
+
+ index++;
+ }
+
+ BUG();
+}
+EXPORT_SYMBOL(drm_crtc_index);
+
/**
* drm_mode_probed_add - add a mode to a connector's probed mode list
* @connector: connector the new mode
/**
* drm_mode_probed_add - add a mode to a connector's probed mode list
* @connector: connector the new mode
static bool drm_encoder_crtc_ok(struct drm_encoder *encoder,
struct drm_crtc *crtc)
{
static bool drm_encoder_crtc_ok(struct drm_encoder *encoder,
struct drm_crtc *crtc)
{
- struct drm_device *dev;
- struct drm_crtc *tmp;
- int crtc_mask = 1;
-
- WARN(!crtc, "checking null crtc?\n");
-
- dev = crtc->dev;
-
- list_for_each_entry(tmp, &dev->mode_config.crtc_list, head) {
- if (tmp == crtc)
- break;
- crtc_mask <<= 1;
- }
-
- if (encoder->possible_crtcs & crtc_mask)
- return true;
- return false;
+ return !!(encoder->possible_crtcs & drm_crtc_mask(crtc));
struct drm_crtc *crtc,
const struct drm_crtc_funcs *funcs);
extern void drm_crtc_cleanup(struct drm_crtc *crtc);
struct drm_crtc *crtc,
const struct drm_crtc_funcs *funcs);
extern void drm_crtc_cleanup(struct drm_crtc *crtc);
+extern unsigned int drm_crtc_index(struct drm_crtc *crtc);
+
+/**
+ * drm_crtc_mask - find the mask of a registered CRTC
+ * @crtc: CRTC to find mask for
+ *
+ * Given a registered CRTC, return the mask bit of that CRTC for an
+ * encoder's possible_crtcs field.
+ */
+static inline uint32_t drm_crtc_mask(struct drm_crtc *crtc)
+{
+ return 1 << drm_crtc_index(crtc);
+}
extern void drm_connector_ida_init(void);
extern void drm_connector_ida_destroy(void);
extern void drm_connector_ida_init(void);
extern void drm_connector_ida_destroy(void);