kernel/linux.git/drivers/gpu/drm/loongson, branch v6.12.92

drm/loongson: Use managed KMS polling

2026-05-23T11:04:59+00:00

commit 0a9c56dd387605d17dabeedd9fdd2c4c1d0bab7b upstream. lsdc_pci_probe() initializes KMS polling before setting up vblank support, requesting the IRQ and registering the DRM device. If any of those later steps fails, probe returns without finalizing polling. The driver also never finalizes polling on regular removal. Use drmm_kms_helper_poll_init() so polling is tied to the DRM device lifetime and automatically finalized on probe failure and device removal. This issue was identified during our ongoing static-analysis research while reviewing kernel code. Fixes: f39db26c5428 ("drm: Add kms driver for loongson display controller") Cc: stable@vger.kernel.org Co-developed-by: Ijae Kim Signed-off-by: Ijae Kim Reviewed-by: Thomas Zimmermann Acked-by: Jianmin Lv Reviewed-by: Huacai Chen Signed-off-by: Myeonghun Pak Signed-off-by: Thomas Zimmermann Link: https://patch.msgid.link/20260513065706.23803-1-mhun512@gmail.com Signed-off-by: Greg Kroah-Hartman

drm/loongson: use GEM references instead of TTMs

2024-08-01T08:03:44+00:00

Instead of a TTM reference grab a GEM reference whenever necessary. Signed-off-by: Christian König Reviewed-by: Daniel Vetter Cc: Sui Jingfeng Link: https://patchwork.freedesktop.org/patch/msgid/20240723121750.2086-3-christian.koenig@amd.com

drm/loongson/7a2000: convert to struct drm_edid

2024-05-27T12:31:36+00:00

Prefer the struct drm_edid based functions for reading the EDID and updating the connector. Reviewed-by: Sui Jingfeng Link: https://patchwork.freedesktop.org/patch/msgid/b8c477279a6ae1b44df72bee230180e277087fae.1715691257.git.jani.nikula@intel.com Signed-off-by: Jani Nikula

drm/loongson/7a1000: convert to struct drm_edid

2024-05-27T12:31:28+00:00

Prefer the struct drm_edid based functions for reading the EDID and updating the connector. Reviewed-by: Sui Jingfeng Link: https://patchwork.freedesktop.org/patch/msgid/22c66af62cd5ae1998bbaf6801cda3cc689f9e3f.1715691257.git.jani.nikula@intel.com Signed-off-by: Jani Nikula

drm/fbdev-generic: Convert to fbdev-ttm

2024-05-02T09:33:32+00:00

Only TTM-based drivers use fbdev-generic. Rename it to fbdev-ttm and change the symbol infix from _generic_ to _ttm_. Link the source file into TTM helpers, so that it is only build if TTM-based drivers have been selected. Select DRM_TTM_HELPER for loongson. Signed-off-by: Thomas Zimmermann Reviewed-by: Javier Martinez Canillas Link: https://patchwork.freedesktop.org/patch/msgid/20240419083331.7761-43-tzimmermann@suse.de

drm/loongson: fix build after debugfs include change

2024-04-26T04:30:36+00:00

This failed to build here after the header rework. Fixes: 33d5ae6cacf4 ("drm/print: drop include debugfs.h and include where needed") Signed-off-by: Dave Airlie

drm/gem: Acquire reservation lock in drm_gem_{pin/unpin}()

2024-03-11T12:33:50+00:00

Acquire the buffer object's reservation lock in drm_gem_pin() and remove locking the drivers' GEM callbacks where necessary. Same for unpin(). DRM drivers and memory managers modified by this patch will now have correct dma-buf locking semantics: the caller is responsible for holding the reservation lock when calling the pin or unpin callback. DRM drivers and memory managers that are not modified will now be protected against concurent invocation of their pin and unpin callbacks. PRIME does not implement struct dma_buf_ops.pin, which requires the caller to hold the reservation lock. It does implement struct dma_buf_ops.attach, which requires to callee to acquire the reservation lock. The PRIME code uses drm_gem_pin(), so locks are now taken as specified. Same for unpin and detach. The patch harmonizes GEM pin and unpin to have non-interruptible reservation locking across all drivers, as is already the case for vmap and vunmap. This affects gem-shmem, gem-vram, loongson, qxl and radeon. Signed-off-by: Thomas Zimmermann Reviewed-by: Christian König Reviewed-by: Zack Rusin Reviewed-by: Dmitry Osipenko Tested-by: Dmitry Osipenko # virtio-gpu Link: https://patchwork.freedesktop.org/patch/msgid/20240227113853.8464-10-tzimmermann@suse.de

Merge drm/drm-next into drm-misc-next

2024-01-29T13:20:23+00:00

Kickstart 6.9 development cycle. Signed-off-by: Maxime Ripard

drm/loongson: Error out if no VRAM detected

2024-01-28T11:06:46+00:00

When a Loongson laptop is equipped with a Radeon GPU, it can be true that there is no dedicated VRAM soldered on the motherboard. This is probably for cost reason, but drm/loongson driver is probed because the platform BIOS (either UEFI or PMON) forget to disable the integrated GPU. So in the lsdc_get_dedicated_vram() function, we error out if no dedicated VRAM detected. This fix nothing, but serve as a sanity check only. Tested-by: Xiaotian Wu Signed-off-by: Huacai Chen Reviewed-by: Sui Jingfeng Signed-off-by: Sui Jingfeng Link: https://patchwork.freedesktop.org/patch/msgid/20240124101607.2910998-1-chenhuacai@loongson.cn

drm/ttm: replace busy placement with flags v6

2024-01-25T08:59:44+00:00

Instead of a list of separate busy placement add flags which indicate that a placement should only be used when there is room or if we need to evict. v2: add missing TTM_PL_FLAG_IDLE for i915 v3: fix auto build test ERROR on drm-tip/drm-tip v4: fix some typos pointed out by checkpatch v5: cleanup some rebase problems with VMWGFX v6: implement some missing VMWGFX functionality pointed out by Zack, rename the flags as suggested by Michel, rebase on drm-tip and adjust XE as well Signed-off-by: Christian König Signed-off-by: Somalapuram Amaranath Reviewed-by: Zack Rusin Reviewed-by: Thomas Zimmermann Reviewed-by: Thomas Hellström Link: https://patchwork.freedesktop.org/patch/msgid/20240112125158.2748-4-christian.koenig@amd.com