Hi Am 30.03.23 um 11:51 schrieb Dmitry Baryshkov:
On Thu, 30 Mar 2023 at 10:41, Thomas Zimmermann <tzimmermann@xxxxxxx> wrote:Move aperture management out of the fbdev code. It is unrelated and needs to run even if fbdev support has been disabled. Call the helper at the top of msm_drm_init() to take over hardware from other drivers. Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx> --- drivers/gpu/drm/msm/msm_drv.c | 6 ++++++ drivers/gpu/drm/msm/msm_fbdev.c | 6 ------ 2 files changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c index aca48c868c14..5211140ec50b 100644 --- a/drivers/gpu/drm/msm/msm_drv.c +++ b/drivers/gpu/drm/msm/msm_drv.c @@ -12,6 +12,7 @@ #include <linux/uaccess.h> #include <uapi/linux/sched/types.h> +#include <drm/drm_aperture.h> #include <drm/drm_bridge.h> #include <drm/drm_drv.h> #include <drm/drm_file.h> @@ -411,6 +412,11 @@ static int msm_drm_init(struct device *dev, const struct drm_driver *drv) if (drm_firmware_drivers_only()) return -ENODEV; + /* the fw fb could be anywhere in memory */ + ret = drm_aperture_remove_framebuffers(false, drv); + if (ret) + return ret; +I think it is not a good place to remove framebuffers. EFIFB might be still alive and if we kick it out, it might be very hard to debug what went wrong. Could you please move it after component bind? Then we can be sure at least that all subdevices are bound. I see that armada and sun4i call it as late as possible, when no calls can fail.
Ok. I briefly looked over the code to make sure that no code touches HW settings before msm acquires the device.
Best regards Thomas
ddev = drm_dev_alloc(drv, dev); if (IS_ERR(ddev)) { DRM_DEV_ERROR(dev, "failed to allocate drm_device\n"); diff --git a/drivers/gpu/drm/msm/msm_fbdev.c b/drivers/gpu/drm/msm/msm_fbdev.c index d26aa52217ce..fc7d0406a9f9 100644 --- a/drivers/gpu/drm/msm/msm_fbdev.c +++ b/drivers/gpu/drm/msm/msm_fbdev.c @@ -4,7 +4,6 @@ * Author: Rob Clark <robdclark@xxxxxxxxx> */ -#include <drm/drm_aperture.h> #include <drm/drm_crtc.h> #include <drm/drm_fb_helper.h> #include <drm/drm_fourcc.h> @@ -154,11 +153,6 @@ struct drm_fb_helper *msm_fbdev_init(struct drm_device *dev) goto fail; } - /* the fw fb could be anywhere in memory */ - ret = drm_aperture_remove_framebuffers(false, dev->driver); - if (ret) - goto fini; - ret = drm_fb_helper_initial_config(helper); if (ret) goto fini; -- 2.40.0
-- Thomas Zimmermann Graphics Driver Developer SUSE Software Solutions Germany GmbH Maxfeldstr. 5, 90409 Nürnberg, Germany (HRB 36809, AG Nürnberg) Geschäftsführer: Ivo Totev
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