From 6dcf0de7ef10244b17442f47956a1d9fabe2abe1 Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Tue, 23 Aug 2016 08:25:40 +0200 Subject: [PATCH] drm/simple-helpers: Always add planes to the state update MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Our update function is hooked to the single plane, which might not get called for crtc-only updates. Which is surprising, so fix this by always adding the plane. While at it document how&when the event should be sent out better in the kerneldoc. Cc: Noralf Trønnes Cc: andrea.merello@gmail.com Tested-and-Reported-by: andrea.merello@gmail.com Signed-off-by: Daniel Vetter Reviewed-by: Noralf Trønnes Signed-off-by: Daniel Vetter Link: http://patchwork.freedesktop.org/patch/msgid/1471933540-31131-1-git-send-email-daniel.vetter@ffwll.ch --- drivers/gpu/drm/drm_simple_kms_helper.c | 7 +++++++ include/drm/drm_simple_kms_helper.h | 6 ++++++ 2 files changed, 13 insertions(+) diff --git a/drivers/gpu/drm/drm_simple_kms_helper.c b/drivers/gpu/drm/drm_simple_kms_helper.c index bada17166512..447631018426 100644 --- a/drivers/gpu/drm/drm_simple_kms_helper.c +++ b/drivers/gpu/drm/drm_simple_kms_helper.c @@ -34,6 +34,12 @@ static const struct drm_encoder_funcs drm_simple_kms_encoder_funcs = { .destroy = drm_encoder_cleanup, }; +static int drm_simple_kms_crtc_check(struct drm_crtc *crtc, + struct drm_crtc_state *state) +{ + return drm_atomic_add_affected_planes(state->state, crtc); +} + static void drm_simple_kms_crtc_enable(struct drm_crtc *crtc) { struct drm_simple_display_pipe *pipe; @@ -57,6 +63,7 @@ static void drm_simple_kms_crtc_disable(struct drm_crtc *crtc) } static const struct drm_crtc_helper_funcs drm_simple_kms_crtc_helper_funcs = { + .atomic_check = drm_simple_kms_crtc_check, .disable = drm_simple_kms_crtc_disable, .enable = drm_simple_kms_crtc_enable, }; diff --git a/include/drm/drm_simple_kms_helper.h b/include/drm/drm_simple_kms_helper.h index 269039722f91..826946ca2b82 100644 --- a/include/drm/drm_simple_kms_helper.h +++ b/include/drm/drm_simple_kms_helper.h @@ -60,6 +60,12 @@ struct drm_simple_display_pipe_funcs { * * This function is called when the underlying plane state is updated. * This hook is optional. + * + * This is the function drivers should submit the + * &drm_pending_vblank_event from. Using either + * drm_crtc_arm_vblank_event(), when the driver supports vblank + * interrupt handling, or drm_crtc_send_vblank_event() directly in case + * the hardware lacks vblank support entirely. */ void (*update)(struct drm_simple_display_pipe *pipe, struct drm_plane_state *plane_state); -- 2.20.1