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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 <tzimmermann@suse.de>
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Zack Rusin <zack.rusin@broadcom.com>
Reviewed-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Tested-by: Dmitry Osipenko <dmitry.osipenko@collabora.com> # virtio-gpu
Link: https://patchwork.freedesktop.org/patch/msgid/20240227113853.8464-10-tzimmermann@suse.de
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Kickstart 6.9 development cycle.
Signed-off-by: Maxime Ripard <mripard@kernel.org>
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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 <wuxiaotian@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Reviewed-by: Sui Jingfeng <sui.jingfeng@linux.dev>
Signed-off-by: Sui Jingfeng <sui.jingfeng@linux.dev>
Link: https://patchwork.freedesktop.org/patch/msgid/20240124101607.2910998-1-chenhuacai@loongson.cn
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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 <christian.koenig@amd.com>
Signed-off-by: Somalapuram Amaranath <Amaranath.Somalapuram@amd.com>
Reviewed-by: Zack Rusin <zack.rusin@broadcom.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240112125158.2748-4-christian.koenig@amd.com
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git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
Pull i2c updates from Wolfram Sang:
"This removes the currently unused CLASS_DDC support (controllers set
the flag, but there is no client to use it).
Also, CLASS_SPD support gets simplified to prepare removal in the
future. Class based instantiation is not recommended these days
anyhow.
Furthermore, I2C core now creates a debugfs directory per I2C adapter.
Current bus driver users were converted to use it.
Finally, quite some driver updates. Standing out are patches for the
wmt-driver which is refactored to support more variants.
This is the rebased pull request where a large series for the
designware driver was dropped"
* tag 'i2c-for-6.8-rc1-rebased' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (38 commits)
MAINTAINERS: use proper email for my I2C work
i2c: stm32f7: add support for stm32mp25 soc
i2c: stm32f7: perform I2C_ISR read once at beginning of event isr
dt-bindings: i2c: document st,stm32mp25-i2c compatible
i2c: stm32f7: simplify status messages in case of errors
i2c: stm32f7: perform most of irq job in threaded handler
i2c: stm32f7: use dev_err_probe upon calls of devm_request_irq
i2c: i801: Add lis3lv02d for Dell XPS 15 7590
i2c: i801: Add lis3lv02d for Dell Precision 3540
i2c: wmt: Reduce redundant: REG_CR setting
i2c: wmt: Reduce redundant: function parameter
i2c: wmt: Reduce redundant: clock mode setting
i2c: wmt: Reduce redundant: wait event complete
i2c: wmt: Reduce redundant: bus busy check
i2c: mux: reg: Remove class-based device auto-detection support
i2c: make i2c_bus_type const
dt-bindings: at24: add ROHM BR24G04
eeprom: at24: use of_match_ptr()
i2c: cpm: Remove linux,i2c-index conversion from be32
i2c: imx: Make SDA actually optional for bus recovering
...
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After removal of the legacy EEPROM driver and I2C_CLASS_DDC support in
olpc_dcon there's no i2c client driver left supporting I2C_CLASS_DDC.
Class-based device auto-detection is a legacy mechanism and shouldn't
be used in new code. So we can remove this class completely now.
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
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Remove unnecessary include statements for <drm/drm_plane_helper.h>.
The file contains helpers for non-atomic code and should not be
required by most drivers. No functional changes.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Sui Jingfeng <suijingfeng@loongson.cn>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Tested-by: Sui Jingfeng <suijingfeng@loongson.cn>
Link: https://patchwork.freedesktop.org/patch/msgid/20231204090852.1650-4-tzimmermann@suse.de
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Only offer the Loongson DRM driver as an option on platforms where
it makes sense.
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Cc: Sui Jingfeng <sui.jingfeng@linux.dev>
Cc: David Airlie <airlied@gmail.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Reviewed-by: Sui Jingfeng <sui.jingfeng@linux.dev>
Signed-off-by: Sui Jingfeng <sui.jingfeng@linux.dev>
Link: https://patchwork.freedesktop.org/patch/msgid/20231113125508.4dc755e8@endymion.delvare
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Based on grepping through the source code these drivers appear to be
missing a call to drm_atomic_helper_shutdown() at system shutdown
time. Among other things, this means that if a panel is in use that it
won't be cleanly powered off at system shutdown time.
The fact that we should call drm_atomic_helper_shutdown() in the case
of OS shutdown/restart comes straight out of the kernel doc "driver
instance overview" in drm_drv.c.
All of the drivers in this patch were fairly straightforward to fix
since they already had a call to drm_atomic_helper_shutdown() at
remove/unbind time but were just lacking one at system shutdown. The
only hitch is that some of these drivers use the component model to
register/unregister their DRM devices. The shutdown callback is part
of the original device. The typical solution here, based on how other
DRM drivers do this, is to keep track of whether the device is bound
based on drvdata. In most cases the drvdata is the drm_device, so we
can just make sure it is NULL when the device is not bound. In some
drivers, this required minor code changes. To make things simpler,
drm_atomic_helper_shutdown() has been modified to consider a NULL
drm_device as a noop in the patch ("drm/atomic-helper:
drm_atomic_helper_shutdown(NULL) should be a noop").
Suggested-by: Maxime Ripard <mripard@kernel.org>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Tested-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Acked-by: Maxime Ripard <mripard@kernel.org>
Tested-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Reviewed-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Reviewed-by: Sui Jingfeng <suijingfeng@loongson.cn>
Tested-by: Sui Jingfeng <suijingfeng@loongson.cn>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230901163944.RFT.2.I9115e5d094a43e687978b0699cc1fe9f2a3452ea@changeid
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There are two problems in lsdc_pixel_pll_setup()
1. If kzalloc() fails then call iounmap() to release the resources.
2. Both kzalloc and ioremap does not return error pointers on failure, so
using IS_ERR_OR_NULL() checks is a bit confusing and not very right,
fix this by changing those to NULL checks instead.
Fixes: f39db26c5428 ("drm: Add kms driver for loongson display controller")
Signed-off-by: Harshit Mogalapalli <harshit.m.mogalapalli@oracle.com>
Reviewed-by: Sui Jingfeng <suijingfeng@loongson.cn>
Signed-off-by: Sui Jingfeng <sui.jingfeng@linux.dev>
Link: https://patchwork.freedesktop.org/patch/msgid/20230720123950.543082-1-harshit.m.mogalapalli@oracle.com
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This code doesn't check for lsdc_bo_create() failure and it could lead
to a crash. It can fail for a variety of reasons, but the most common
cause would be low memory. Add a check.
Fixes: f39db26c5428 ("drm: Add kms driver for loongson display controller")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Sui Jingfeng <suijingfeng@loongson.cn>
Signed-off-by: Sui Jingfeng <sui.jingfeng@linux.dev>
Link: https://patchwork.freedesktop.org/patch/msgid/ZLeijglIMPve2Iio@kadam
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Because smatch warnings:
drivers/gpu/drm/loongson/lsdc_plane.c:199
lsdc_cursor_plane_atomic_async_check()
warn: variable dereferenced before check 'state' (see line 180)
vim +/state +199 drivers/gpu/drm/loongson/lsdc_plane.c
174 static int
lsdc_cursor_plane_atomic_async_check(struct drm_plane *plane,
175 struct drm_atomic_state *state)
176 {
177 struct drm_plane_state *new_state;
178 struct drm_crtc_state *crtc_state;
179
180 new_state = drm_atomic_get_new_plane_state(state, plane);
^^^^^
state is dereferenced inside this function
181
182 if (!plane->state || !plane->state->fb) {
183 drm_dbg(plane->dev, "%s: state is NULL\n", plane->name);
184 return -EINVAL;
185 }
186
187 if (new_state->crtc_w != new_state->crtc_h) {
188 drm_dbg(plane->dev, "unsupported cursor size: %ux%u\n",
189 new_state->crtc_w, new_state->crtc_h);
190 return -EINVAL;
191 }
192
193 if (new_state->crtc_w != 64 && new_state->crtc_w != 32) {
194 drm_dbg(plane->dev, "unsupported cursor size: %ux%u\n",
195 new_state->crtc_w, new_state->crtc_h);
196 return -EINVAL;
197 }
198
199 if (state) {
^^^^^
Checked too late!
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Closes: https://lore.kernel.org/r/202307100423.rV7D05Uq-lkp@intel.com/
Signed-off-by: Sui Jingfeng <suijingfeng@loongson.cn>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Sui Jingfeng <sui.jingfeng@linux.dev>
Link: https://patchwork.freedesktop.org/patch/msgid/20230710102411.257970-1-suijingfeng@loongson.cn
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Loongson display controller IP has been integrated in both Loongson north
bridge chipset (ls7a1000/ls7a2000) and Loongson SoCs (ls2k1000/ls2k2000).
It has even been included in Loongson's BMC products. It has two display
pipes, and each display pipe supports a primary plane and a cursor plane.
For the DC in the LS7a1000, each display pipe has a DVO output interface,
which is able to support 1920x1080@60Hz. For the DC in the LS7A2000, each
display pipe is equipped with a built-in HDMI encoder, which is compliant
with the HDMI 1.4 specification. The first display pipe is also equipped
with a transparent VGA encoder, which is parallel with the HDMI encoder.
To get a decent performance for writing framebuffer data to the VRAM, the
write combine support should be enabled.
v1 -> v2:
1) Use hpd status reg when polling for ls7a2000.
2) Fix all warnings that emerged when compiling with W=1.
v2 -> v3:
1) Add COMPILE_TEST to Kconfig and make the driver off by default
2) Alphabetical sorting headers (Thomas)
3) Untangle register access functions as much as possible (Thomas)
4) Switch to TTM-based memory manager (Thomas)
5) Add the chip ID detection function which can be used to distinguish
chip models
6) Revise the built-in HDMI phy driver, nearly all main stream mode below
4K@30Hz is tested, and this driver supports clone(mirror) display mode
and extend(joint) display mode.
v3 -> v4:
1) Quickly fix a small mistake.
v4 -> v5:
1) Add per display pipe debugfs support to the builtin HDMI encoder.
v5 -> v6:
1) Remove stray code which didn't get used, say lsdc_of_get_reserved_ram
2) Fix all typos I could found, make sentences and code more readable
3) Untangle lsdc_hdmi*_connector_detect() function according to the pipe
4) Rename this driver as loongson.
v6 -> v7:
1) Add prime support for buffer self-sharing, sharing buffer with
drm/etnaviv is also tested and it works with limitations.
2) Implement buffer object tracking with list_head.
3) Add S3(sleep to RAM) support
4) Rewrite lsdc_bo_move since TTM core stop allocating resources
during BO creation. Patch V1 ~ V6 of this series no longer work.
Thus, we send V7.
v7 -> v8:
1) Zero a compile warning on a 32-bit platform, compile with W=1
2) Revise lsdc_bo_gpu_offset() and make minor cleanups.
3) Pageflip tested on the virtual terminal with the following commands:
modetest -M loongson -s 32:1920x1080 -v
modetest -M loongson -s 34:1920x1080 -v -F tiles
It works like a charm, when running the pageflip test with dual screens
configuration, another two additional BOs were created by the modetest,
VRAM usage up to 40+ MB, well we have at least 64MB, still enough.
# cat bos
bo[0000]: size: 8112kB VRAM
bo[0001]: size: 16kB VRAM
bo[0002]: size: 16kB VRAM
bo[0003]: size: 16208kB VRAM
bo[0004]: size: 8112kB VRAM
bo[0005]: size: 8112kB VRAM
v8 -> v9:
1) Select I2C and I2C_ALGOBIT in Kconfig, should depend on MMU.
2) Using pci_get_domain_bus_and_slot to get the GPU device.
v9 -> v10:
1) Revise lsdc_drm_freeze() to implement S3 correctly. We realized that
the pinned BO could not be moved, the VRAM lost power when sleeping
to RAM. Thus, the data in the buffer who is pinned in VRAM will get
lost when resumed. Yet it's not a big problem because this driver
relies on the CPU to update the front framebuffer. We can see the
garbage data when resume from S3, but the screen will show the right
image as I move the cursor. This is due to the CPU repaint. v10 of
this patch makes S3 perfect by unpin all of the BOs in VRAM, evict
them all to system RAM in lsdc_drm_freeze().
v10 -> v11:
1) On a double-screen case, The buffer object backing the single giant
framebuffer is referenced by two GEM objects; hence, it will be
pinned at least twice by prepare_fb() function. This causes its pin
count > 1. V10 of this patch only unpins VRAM BOs once when suspend,
which is not correct on double-screen case. V11 of this patch unpin
the BOs until its pin count reaches zero when suspend. Then, we make
the S3 support complete finally. With v11, I can't see any garbage
data when resume.
2) Fix vblank wait timeout when disable CRTC.
3) Test against IGT, at least fbdev test and kms_flip test passed.
4) Rewrite pixel PLL update function, magic numbers eliminated (Emil)
5) Drop a few common hardware features description in lsdc_desc (Emil)
6) Drop lsdc_mode_config_mode_valid(), instead add restrictions in dumb
create function. (Emil)
7) Untangle the ls7a1000 case and ls7a2000 case completely (Thomas)
v11 -> v12:
none
v12 -> v13:
1) Add benchmarks to figure out the bandwidth of the hardware platform.
Usage:
# cd /sys/kernel/debug/dri/0/
# cat benchmark
2) VRAM is filled with garbage data if uninitialized, add a buffer
clearing procedure (lsdc_bo_clear), clear the BO on creation time.
3) Update copyrights and adjust coding style (Huacai)
v13 -> v14:
1) Trying to add async update support for cursor plane.
v14 -> v15:
1) Add lsdc_vga_set_decode() funciton, which allow us remove multi-video
cards workaround, now it allow drm/loongson, drm/amdgpu, drm/etnaviv
co-exist in the system, more is also possible (Emil and Xuerui)
2) Fix typos and grammar mistakes as much as possible (Xuerui)
3) Unify copyrights as GPL-2.0+ (Xuerui)
4) Fix a bug introduce since V13, TTM may import BO from other drivers,
we shouldn't clear it on such a case.
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: David Airlie <airlied@gmail.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: Sumit Semwal <sumit.semwal@linaro.org>
Cc: "Christian König" <christian.koenig@amd.com>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Emil Velikov <emil.l.velikov@gmail.com>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: loongson-kernel@lists.loongnix.cn
Tested-by: Liu Peibao <liupeibao@loongson.cn>
Tested-by: Li Yi <liyi@loongson.cn>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Sui Jingfeng <suijingfeng@loongson.cn>
Link: https://patchwork.freedesktop.org/patch/msgid/20230615143613.1236245-2-15330273260@189.cn
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