From e10cde4ad0edca3ceffd87ac30a53d8977d06ba5 Mon Sep 17 00:00:00 2001 From: Maxime Ripard Date: Wed, 27 May 2020 17:47:47 +0200 Subject: drm/vc4: plane: Move planes creation to its own function The planes so far were created as part of the CRTC binding code with each planes created associated only to one CRTC. However, the hardware in the vc4 doesn't really have such constraint and can be used with any CRTC. In order to rework this, let's first move the overlay and cursor planes creation to a function of its own. Reviewed-by: Eric Anholt Signed-off-by: Maxime Ripard Link: https://patchwork.freedesktop.org/patch/msgid/a378ea56214179f1f25fcd36ecc69511edd1e790.1590594512.git-series.maxime@cerno.tech --- drivers/gpu/drm/vc4/vc4_plane.c | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) (limited to 'drivers/gpu/drm/vc4/vc4_plane.c') diff --git a/drivers/gpu/drm/vc4/vc4_plane.c b/drivers/gpu/drm/vc4/vc4_plane.c index 91e408f7a56e..ea559b3288f5 100644 --- a/drivers/gpu/drm/vc4/vc4_plane.c +++ b/drivers/gpu/drm/vc4/vc4_plane.c @@ -1267,3 +1267,41 @@ struct drm_plane *vc4_plane_init(struct drm_device *dev, return plane; } + +int vc4_plane_create_additional_planes(struct drm_device *drm, + struct drm_crtc *crtc) +{ + struct drm_plane *cursor_plane; + unsigned int i; + + /* Set up some arbitrary number of planes. We're not limited + * by a set number of physical registers, just the space in + * the HVS (16k) and how small an plane can be (28 bytes). + * However, each plane we set up takes up some memory, and + * increases the cost of looping over planes, which atomic + * modesetting does quite a bit. As a result, we pick a + * modest number of planes to expose, that should hopefully + * still cover any sane usecase. + */ + for (i = 0; i < 8; i++) { + struct drm_plane *plane = + vc4_plane_init(drm, DRM_PLANE_TYPE_OVERLAY); + + if (IS_ERR(plane)) + continue; + + plane->possible_crtcs = drm_crtc_mask(crtc); + } + + /* Set up the legacy cursor after overlay initialization, + * since we overlay planes on the CRTC in the order they were + * initialized. + */ + cursor_plane = vc4_plane_init(drm, DRM_PLANE_TYPE_CURSOR); + if (!IS_ERR(cursor_plane)) { + cursor_plane->possible_crtcs = drm_crtc_mask(crtc); + crtc->cursor = cursor_plane; + } + + return 0; +} -- cgit v1.2.3