linux/drivers/gpu/drm/mediatek, branch v6.6

drm/mediatek: Correctly free sg_table in gem prime vmap

2023-10-16T15:44:03Z

The MediaTek DRM driver implements GEM PRIME vmap by fetching the sg_table for the object, iterating through the pages, and then vmapping them. In essence, unlike the GEM DMA helpers which vmap when the object is first created or imported, the MediaTek version does it on request. Unfortunately, the code never correctly frees the sg_table contents. This results in a kernel memory leak. On a Hayato device with a text console on the internal display, this results in the system running out of memory in a few days from all the console screen cursor updates. Add sg_free_table() to correctly free the contents of the sg_table. This was missing despite explicitly required by mtk_gem_prime_get_sg_table(). Also move the "out" shortcut label to after the kfree() call for the sg_table. Having sg_free_table() together with kfree() makes more sense. The shortcut is only used when the object already has a kernel address, in which case the pointer is NULL and kfree() does nothing. Hence this change causes no functional change. Fixes: 3df64d7b0a4f ("drm/mediatek: Implement gem prime vmap/vunmap function") Cc: Signed-off-by: Chen-Yu Tsai Reviewed-by: CK Hu Link: https://patchwork.kernel.org/project/dri-devel/patch/20231004083226.1940055-1-wenst@chromium.org/ Signed-off-by: Chun-Kuang Hu

Merge tag 'mediatek-drm-next-6.6' of https://git.kernel.org/pub/scm/linux/kernel/git/chunkuang.hu/linux into drm-next

2023-08-15T02:07:19Z

Mediatek DRM Next for Linux 6.6 1. Small mtk-dpi cleanups 2. DisplayPort: support eDP and aux-bus 3. Fix uninitialized symbol 4. Do not check for 0 return after calling platform_get_irq() 5. Convert to platform remove callback returning void 6. Fix coverity issues 7. Fix potential memory leak if vmap() fail 8. Fix void-pointer-to-enum-cast warning 9. Rid W=1 warnings from GPU Signed-off-by: Dave Airlie From: Chun-Kuang Hu Link: https://patchwork.freedesktop.org/patch/msgid/20230813152726.14802-1-chunkuang.hu@kernel.org

drm/mediatek/mtk_disp_ccorr: Remove half completed incorrect struct header

2023-08-13T14:42:43Z

Fixes the following W=1 kernel build warning(s): drivers/gpu/drm/mediatek/mtk_disp_ccorr.c:47: warning: Function parameter or member 'clk' not described in 'mtk_disp_ccorr' drivers/gpu/drm/mediatek/mtk_disp_ccorr.c:47: warning: Function parameter or member 'regs' not described in 'mtk_disp_ccorr' drivers/gpu/drm/mediatek/mtk_disp_ccorr.c:47: warning: Function parameter or member 'cmdq_reg' not described in 'mtk_disp_ccorr' drivers/gpu/drm/mediatek/mtk_disp_ccorr.c:47: warning: Function parameter or member 'data' not described in 'mtk_disp_ccorr' Cc: Chun-Kuang Hu Cc: Philipp Zabel Cc: David Airlie Cc: Daniel Vetter Cc: Matthias Brugger Cc: AngeloGioacchino Del Regno Cc: dri-devel@lists.freedesktop.org Cc: linux-mediatek@lists.infradead.org Cc: linux-arm-kernel@lists.infradead.org Signed-off-by: Lee Jones Reviewed-by: AngeloGioacchino Del Regno Link: https://patchwork.kernel.org/project/dri-devel/patch/20230609081732.3842341-6-lee@kernel.org/ Signed-off-by: Chun-Kuang Hu

drm/mediatek/mtk_disp_aal: Remove half completed incorrect struct header

2023-08-13T14:40:23Z

Fixes the following W=1 kernel build warning(s): drivers/gpu/drm/mediatek/mtk_disp_aal.c:39: warning: Function parameter or member 'clk' not described in 'mtk_disp_aal' drivers/gpu/drm/mediatek/mtk_disp_aal.c:39: warning: Function parameter or member 'regs' not described in 'mtk_disp_aal' drivers/gpu/drm/mediatek/mtk_disp_aal.c:39: warning: Function parameter or member 'cmdq_reg' not described in 'mtk_disp_aal' drivers/gpu/drm/mediatek/mtk_disp_aal.c:39: warning: Function parameter or member 'data' not described in 'mtk_disp_aal' Cc: Chun-Kuang Hu Cc: Philipp Zabel Cc: David Airlie Cc: Daniel Vetter Cc: Matthias Brugger Cc: AngeloGioacchino Del Regno Cc: dri-devel@lists.freedesktop.org Cc: linux-mediatek@lists.infradead.org Cc: linux-arm-kernel@lists.infradead.org Signed-off-by: Lee Jones Reviewed-by: AngeloGioacchino Del Regno Link: https://patchwork.kernel.org/project/dri-devel/patch/20230609081732.3842341-5-lee@kernel.org/ Signed-off-by: Chun-Kuang Hu

drm/mediatek: Fix void-pointer-to-enum-cast warning

2023-08-13T14:33:59Z

1. Fix build warning message in mtk_disp_ovl_adaptor.c >> drivers/gpu/drm/mediatek/mtk_disp_ovl_adaptor.c:415:10: warning: cast to smaller integer type 'enum mtk_ovl_adaptor_comp_type' from 'const void *' [-Wvoid-pointer-to-enum-cast] type = (enum mtk_ovl_adaptor_comp_type)of_id->data; ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 1 warning generated. 2. Also fix the same warning message in mtk_drm_drv.c >> drivers/gpu/drm/mediatek/mtk_drm_drv.c:832:15: warning: cast to smaller integer type 'enum mtk_ddp_comp_type' from 'const void *' [-Wvoid-pointer-to-enum-cast] comp_type = (enum mtk_ddp_comp_type)of_id->data; ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 1 warning generated. Signed-off-by: Jason-JH.Lin Fixes: 453c3364632a ("drm/mediatek: Add ovl_adaptor support for MT8195") Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202305042054.ZtWME9OU-lkp@intel.com/ Reviewed-by: CK Hu Link: https://patchwork.kernel.org/project/dri-devel/patch/20230621075421.1982-1-jason-jh.lin@mediatek.com/ Signed-off-by: Chun-Kuang Hu

drm/mediatek: Fix potential memory leak if vmap() fail

2023-08-13T14:26:13Z

Also return -ENOMEM if such a failure happens, the implement should take responsibility for the error handling. Fixes: 3df64d7b0a4f ("drm/mediatek: Implement gem prime vmap/vunmap function") Reviewed-by: Matthias Brugger Reviewed-by: Alexandre Mergnat Signed-off-by: Sui Jingfeng Reviewed-by: CK Hu Reviewed-by: AngeloGioacchino Del Regno Link: https://patchwork.kernel.org/project/dri-devel/patch/20230706134000.130098-1-suijingfeng@loongson.cn/ Signed-off-by: Chun-Kuang Hu

drm/mediatek: Fix dereference before null check

2023-08-10T23:50:32Z

Null-checking state suggests that it may be null, but it has already been dereferenced on drm_atomic_get_new_plane_state(state, plane). The parameter state will never be NULL currently, so just remove the state is NULL flow in this function. Fixes: 5ddb0bd4ddc3 ("drm/atomic: Pass the full state to planes async atomic check and update") Signed-off-by: Jason-JH.Lin Reviewed-by: AngeloGioacchino Del Regno Reviewed-by: CK Hu Reviewed-by: Alexandre Mergnat Link: https://patchwork.kernel.org/project/dri-devel/patch/20230714094908.13087-5-jason-jh.lin@mediatek.com/ Signed-off-by: Chun-Kuang Hu

drm/mediatek: Add cnt checking for coverity issue

2023-08-10T23:47:49Z

CERT-C Characters and Strings (CERT STR31-C) all_drm_priv[cnt] evaluates to an address that could be at negative offset of an array. In mtk_drm_get_all_drm_priv(): Guarantee that storage for strings has sufficient space for character data and the null terminator. So change cnt to unsigned int and check its max value. Fixes: 1ef7ed48356c ("drm/mediatek: Modify mediatek-drm for mt8195 multi mmsys support") Signed-off-by: Jason-JH.Lin Reviewed-by: AngeloGioacchino Del Regno Reviewed-by: CK Hu Reviewed-by: Alexandre Mergnat Link: https://patchwork.kernel.org/project/dri-devel/patch/20230714094908.13087-3-jason-jh.lin@mediatek.com/ Signed-off-by: Chun-Kuang Hu

drm/mediatek: Remove freeing not dynamic allocated memory

2023-08-10T23:46:17Z

Fixing the coverity issue of: mtk_drm_cmdq_pkt_destroy frees address of mtk_crtc->cmdq_handle So remove the free function. Fixes: 7627122fd1c0 ("drm/mediatek: Add cmdq_handle in mtk_crtc") Signed-off-by: Jason-JH.Lin Reviewed-by: AngeloGioacchino Del Regno Reviewed-by: CK Hu Reviewed-by: Alexandre Mergnat Link: https://patchwork.kernel.org/project/dri-devel/patch/20230714094908.13087-2-jason-jh.lin@mediatek.com/ Signed-off-by: Chun-Kuang Hu

drm/mediatek: Convert to platform remove callback returning void

2023-08-10T23:41:55Z

The .remove() callback for a platform driver returns an int which makes many driver authors wrongly assume it's possible to do error handling by returning an error code. However the value returned is (mostly) ignored and this typically results in resource leaks. To improve here there is a quest to make the remove callback return void. In the first step of this quest all drivers are converted to .remove_new() which already returns void. Trivially convert the mediatek drm drivers from always returning zero in the remove callback to the void returning variant. Reviewed-by: Matthias Brugger Reviewed-by: Thomas Zimmermann Reviewed-by: Jyri Sarha Signed-off-by: Uwe Kleine-König Reviewed-by: AngeloGioacchino Del Regno Link: https://patchwork.kernel.org/project/dri-devel/patch/20230801110239.831099-8-u.kleine-koenig@pengutronix.de/ Signed-off-by: Chun-Kuang Hu