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authorRussell King <rmk+kernel@arm.linux.org.uk>2014-01-02 21:27:33 +0000
committerThierry Reding <treding@nvidia.com>2014-01-14 14:35:02 +0100
commitdb5f7a6e78303fd96dc87487d6976145f70ab84a (patch)
tree67e1794359724795088e92c4ded11fff46e58007 /drivers/gpu/drm/drm_crtc_helper.c
parentff5009ef8df87908a956412619e4f1bf1078ef5d (diff)
drm: provide a helper for the encoder possible_crtcs mask
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>
Diffstat (limited to 'drivers/gpu/drm/drm_crtc_helper.c')
-rw-r--r--drivers/gpu/drm/drm_crtc_helper.c18
1 files changed, 1 insertions, 17 deletions
diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c
index 01361aba033b..940c678cf012 100644
--- a/drivers/gpu/drm/drm_crtc_helper.c
+++ b/drivers/gpu/drm/drm_crtc_helper.c
@@ -334,23 +334,7 @@ EXPORT_SYMBOL(drm_helper_disable_unused_functions);
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));
}
/*