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| author |   Thomas Zimmermann <tzimmermann@suse.de> | 2023-07-07 10:31:57 +0200 |
|---|---|---|
| committer | Thomas Zimmermann <tzimmermann@suse.de> | 2023-07-24 20:14:43 +0200 |
| commit | b1d69bf1bf93d23751031e8f086e3b6ba275320b (patch) | |
| tree | 360b1ddc701885155ffa0657d44e12c0ed4afc82 | |
| parent | drm/tegra: Store pointer to vmap'ed framebuffer in screen_buffer (diff) | |
| download | wireguard-linux-b1d69bf1bf93d23751031e8f086e3b6ba275320b.tar.xz wireguard-linux-b1d69bf1bf93d23751031e8f086e3b6ba275320b.zip | |
drm/exynos: Use fbdev DMA helpers
Use fbdev's DMA helpers for fbdev emulation. The driver previously
used the I/O-memory helpers, while allocating DMA-able system memory.
This could (in theory) result in bus errors from accessing the memory
range.
This bug has been present since the exynos driver was first added.
v2:
* drop the pointless Fixes tag (Javier)
* fix typo in commit message
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Acked-by: Inki Dae <inki.dae@samsung.com>
Acked-by: Maxime Ripard <mripard@kernel.org>
Cc: Inki Dae <inki.dae@samsung.com>
Cc: Seung-Woo Kim <sw0312.kim@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Cc: Alim Akhtar <alim.akhtar@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230707083422.18691-7-tzimmermann@suse.de
| -rw-r--r-- | drivers/gpu/drm/exynos/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/exynos/exynos_drm_fbdev.c | 4 |
2 files changed, 3 insertions, 3 deletions
diff --git a/drivers/gpu/drm/exynos/Kconfig b/drivers/gpu/drm/exynos/Kconfig index 7ca7e1dab52c..661b42ad4873 100644 --- a/drivers/gpu/drm/exynos/Kconfig +++ b/drivers/gpu/drm/exynos/Kconfig @@ -7,7 +7,7 @@ config DRM_EXYNOS select DRM_DISPLAY_HELPER if DRM_EXYNOS_DP select DRM_KMS_HELPER select VIDEOMODE_HELPERS - select FB_IO_HELPERS if DRM_FBDEV_EMULATION + select FB_DMA_HELPERS if DRM_FBDEV_EMULATION select SND_SOC_HDMI_CODEC if SND_SOC help Choose this option if you have a Samsung SoC Exynos chipset. diff --git a/drivers/gpu/drm/exynos/exynos_drm_fbdev.c b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c index 226310c765d8..6c5090466524 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_fbdev.c +++ b/drivers/gpu/drm/exynos/exynos_drm_fbdev.c @@ -49,9 +49,9 @@ static void exynos_drm_fb_destroy(struct fb_info *info) static const struct fb_ops exynos_drm_fb_ops = { .owner = THIS_MODULE, - __FB_DEFAULT_IO_OPS_RDWR, + __FB_DEFAULT_DMA_OPS_RDWR, DRM_FB_HELPER_DEFAULT_OPS, - __FB_DEFAULT_IO_OPS_DRAW, + __FB_DEFAULT_DMA_OPS_DRAW, .fb_mmap = exynos_drm_fb_mmap, .fb_destroy = exynos_drm_fb_destroy, }; |