| Message ID | 20211015081601.2472850-1-giulio.benetti@benettiengineering.com |
|---|---|
| State | Accepted |
| Headers | show |
| Series | [v2] package/sunxi-mali-mainline-driver: update help section to make it work on Linux >= 4.20 | expand |
On Fri, 15 Oct 2021 10:16:01 +0200 Giulio Benetti <giulio.benetti@benettiengineering.com> wrote: > On Linux version >= 4.20 in order to have mali working we need to pass > drm_kms_helper.drm_leak_fbdev_smem=1 and at least > drm_kms_helper.drm_fbdev_overalloc=200 to have a double buffer fbdev. > > Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com> > --- > V1->V2: > * add double buffer too > --- > package/sunxi-mali-mainline-driver/Config.in | 6 ++++++ > 1 file changed, 6 insertions(+) Applied to master with some reformatting tweaks. Thanks! Thomas
>>>>> "Giulio" == Giulio Benetti <giulio.benetti@benettiengineering.com> writes: > On Linux version >= 4.20 in order to have mali working we need to pass > drm_kms_helper.drm_leak_fbdev_smem=1 and at least > drm_kms_helper.drm_fbdev_overalloc=200 to have a double buffer fbdev. > Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com> Committed to 2021.02.x and 2021.08.x, thanks.
diff --git a/package/sunxi-mali-mainline-driver/Config.in b/package/sunxi-mali-mainline-driver/Config.in index 5db66c5bf6..bd6819cf82 100644 --- a/package/sunxi-mali-mainline-driver/Config.in +++ b/package/sunxi-mali-mainline-driver/Config.in @@ -25,5 +25,11 @@ config BR2_PACKAGE_SUNXI_MALI_MAINLINE_DRIVER starting from Linux Kernel >= 4.20 following options must be enabled: - CONFIG_DRM_FBDEV_LEAK_PHYS_SMEM + and following kernel command-line must be passed: + `drm_kms_helper.drm_leak_fbdev_smem = 1` + since drm_kms_helper.drm_leak_fbdev_smem is set to 0 by default + `drm_kms_helper.drm_fbdev_overalloc >= 200` + since the driver requires at least double buffering and fails to + work with the default value(100). https://github.com/mripard/sunxi-mali/blob/master/README.md
On Linux version >= 4.20 in order to have mali working we need to pass drm_kms_helper.drm_leak_fbdev_smem=1 and at least drm_kms_helper.drm_fbdev_overalloc=200 to have a double buffer fbdev. Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com> --- V1->V2: * add double buffer too --- package/sunxi-mali-mainline-driver/Config.in | 6 ++++++ 1 file changed, 6 insertions(+)