On Thu, Jan 24, 2013 at 10:20 AM, Daniel Vetter daniel.vetter@ffwll.ch wrote:
The idea behind calling down into the driver's ->fb_probe function on each hotplug seems to be able to reallocate the backing storage (if e.g. a screen with higher resolution gets added). But that requires quite a bit of work in the fb helper itself, since currently we limit new screens to the currently allocated fb. An no kms driver supports fbdev fb resizing.
does an non kms fbdev driver support resizing? That might be a better argument ;-)
w/ framebuffer vaddr all over the place, teaching fbdev to resize seems like it might be kinda fun.. I guess if we really wanted to resize fbdev then we'd be better off beating all the console_lock vs notifier vs whatever else deadlocks so that we could reliably unregister and re-register a framebuffer on last-unplug / first-plug.
Reviewed-by: Rob Clark robdclark@gmail.com
So don't bother and start to simplify the code by calling drm_fb_helper_set_par directly from the fbdev hotplug function, since that's the only thing left in drm_fb_helper_single_fb_probe which does not concern itself with fb allocation and initial setup. Follow-on patches will streamline the initial setup code.
Signed-off-by: Daniel Vetter daniel.vetter@ffwll.ch
drivers/gpu/drm/drm_fb_helper.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c index 5c73a12..90c1117 100644 --- a/drivers/gpu/drm/drm_fb_helper.c +++ b/drivers/gpu/drm/drm_fb_helper.c @@ -859,8 +859,6 @@ static int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper, dev_info(fb_helper->dev->dev, "fb%d: %s frame buffer device\n", info->node, info->fix.id);
} else {drm_fb_helper_set_par(info); } /* Switch back to kernel console on panic */@@ -1436,7 +1434,9 @@ int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper) drm_setup_crtcs(fb_helper); drm_modeset_unlock_all(dev);
return drm_fb_helper_single_fb_probe(fb_helper, bpp_sel);
drm_fb_helper_set_par(fb_helper->fbdev);return 0;} EXPORT_SYMBOL(drm_fb_helper_hotplug_event);
-- 1.7.10.4
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