From f461bd2b494bdf27ed7f9ea03101f7119ed7c695 Mon Sep 17 00:00:00 2001 From: David Lechner Date: Thu, 3 Aug 2017 11:19:08 -0500 Subject: [PATCH] drm/fb-helper: add new drm_setup_crtcs_fb() function This adds a new drm_setup_crtcs_fb() function to handle the parts of drm_setup_crtcs() that touch fb_helper->fb and fb_helper->fbdev. When drm_setup_crtcs() is called during initialization, these fields are NULL because they have not been allocated yet. There is currently a hack at the end of drm_fb_helper_single_fb_probe() that sets fb_helper->fb, so it is moved to the new drm_setup_crtcs_fb() function. This is also done in preparation for addition setup that requires access to fb_helper->fbdev. Signed-off-by: David Lechner Signed-off-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/1501777149-8310-2-git-send-email-david@lechnology.com --- drivers/gpu/drm/drm_fb_helper.c | 30 ++++++++++++++++++------------ 1 file changed, 18 insertions(+), 12 deletions(-) diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c index b2a01d170181..4447a28c6d47 100644 --- a/drivers/gpu/drm/drm_fb_helper.c +++ b/drivers/gpu/drm/drm_fb_helper.c @@ -1821,17 +1821,6 @@ static int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper, if (ret < 0) return ret; - /* - * Set the fb pointer - usually drm_setup_crtcs does this for hotplug - * events, but at init time drm_setup_crtcs needs to be called before - * the fb is allocated (since we need to figure out the desired size of - * the fb before we can allocate it ...). Hence we need to fix things up - * here again. - */ - for (i = 0; i < fb_helper->crtc_count; i++) - if (fb_helper->crtc_info[i].mode_set.num_connectors) - fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb; - return 0; } @@ -2426,7 +2415,6 @@ static void drm_setup_crtcs(struct drm_fb_helper *fb_helper, fb_crtc->desired_mode); drm_connector_get(connector); modeset->connectors[modeset->num_connectors++] = connector; - modeset->fb = fb_helper->fb; modeset->x = offset->x; modeset->y = offset->y; } @@ -2438,6 +2426,22 @@ out: kfree(enabled); } +/* + * This is a continuation of drm_setup_crtcs() that sets up anything related + * to the framebuffer. During initialization, drm_setup_crtcs() is called before + * the framebuffer has been allocated (fb_helper->fb and fb_helper->fbdev). + * So, any setup that touches those fields needs to be done here instead of in + * drm_setup_crtcs(). + */ +static void drm_setup_crtcs_fb(struct drm_fb_helper *fb_helper) +{ + int i; + + for (i = 0; i < fb_helper->crtc_count; i++) + if (fb_helper->crtc_info[i].mode_set.num_connectors) + fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb; +} + /* Note: Drops fb_helper->lock before returning. */ static int __drm_fb_helper_initial_config_and_unlock(struct drm_fb_helper *fb_helper, @@ -2463,6 +2467,7 @@ __drm_fb_helper_initial_config_and_unlock(struct drm_fb_helper *fb_helper, return ret; } + drm_setup_crtcs_fb(fb_helper); fb_helper->deferred_setup = false; @@ -2591,6 +2596,7 @@ int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper) DRM_DEBUG_KMS("\n"); drm_setup_crtcs(fb_helper, fb_helper->fb->width, fb_helper->fb->height); + drm_setup_crtcs_fb(fb_helper); mutex_unlock(&fb_helper->lock); drm_fb_helper_set_par(fb_helper->fbdev); -- 2.20.1