kernel/linux.git/drivers/gpu/drm/mgag200, branch v6.10.7

drm/mgag200: Bind I2C lifetime to DRM device

2024-08-14T13:34:36+00:00

commit eb1ae34e48a09b7a1179c579aed042b032e408f4 upstream. Managed cleanup with devm_add_action_or_reset() will release the I2C adapter when the underlying Linux device goes away. But the connector still refers to it, so this cleanup leaves behind a stale pointer in struct drm_connector.ddc. Bind the lifetime of the I2C adapter to the connector's lifetime by using DRM's managed release. When the DRM device goes away (after the Linux device) DRM will first clean up the connector and then clean up the I2C adapter. Signed-off-by: Thomas Zimmermann Reviewed-by: Jocelyn Falempe Fixes: b279df242972 ("drm/mgag200: Switch I2C code to managed cleanup") Cc: Thomas Zimmermann Cc: Jocelyn Falempe Cc: Dave Airlie Cc: dri-devel@lists.freedesktop.org Cc: # v6.0+ Link: https://patchwork.freedesktop.org/patch/msgid/20240513125620.6337-3-tzimmermann@suse.de Signed-off-by: Greg Kroah-Hartman

drm/mgag200: Set DDC timeout in milliseconds

2024-08-14T13:34:36+00:00

commit ecde5db1598aecab54cc392282c15114f526f05f upstream. Compute the i2c timeout in jiffies from a value in milliseconds. The original values of 2 jiffies equals 2 milliseconds if HZ has been configured to a value of 1000. This corresponds to 2.2 milliseconds used by most other DRM drivers. Update mgag200 accordingly. Signed-off-by: Thomas Zimmermann Reviewed-by: Jocelyn Falempe Fixes: 414c45310625 ("mgag200: initial g200se driver (v2)") Cc: Dave Airlie Cc: Maarten Lankhorst Cc: Maxime Ripard Cc: Thomas Zimmermann Cc: Jocelyn Falempe Cc: dri-devel@lists.freedesktop.org Cc: # v3.5+ Link: https://patchwork.freedesktop.org/patch/msgid/20240513125620.6337-2-tzimmermann@suse.de Signed-off-by: Greg Kroah-Hartman

drm/mgag200: Add drm_panic support

2024-04-15T14:13:50+00:00

Add support for the drm_panic module, which displays a message to the screen when a kernel panic occurs. v5: * Also check that the plane is visible and primary. (Thomas Zimmermann) v7: * use drm_for_each_primary_visible_plane() v8: * Replace get_scanout_buffer() logic with drm_panic_set_buffer() (Thomas Zimmermann) v9: * Revert to using get_scanout_buffer() (Sima) * move get_scanout_buffer() to plane helper functions (Thomas Zimmermann) v12: * Use array for map and pitch in struct drm_scanout_buffer to support multi-planar format later. (Thomas Zimmermann) Signed-off-by: Jocelyn Falempe Reviewed-by: Thomas Zimmermann Link: https://patchwork.freedesktop.org/patch/msgid/20240409163432.352518-8-jfalempe@redhat.com Acked-by: Daniel Vetter

drm/mgag200: Add a workaround for low-latency

2024-02-26T15:37:51+00:00

We found a regression in v5.10 on real-time server, using the rt-kernel and the mgag200 driver. It's some really specialized workload, with <10us latency expectation on isolated core. After the v5.10, the real time tasks missed their <10us latency when something prints on the screen (fbcon or printk) The regression has been bisected to 2 commits: commit 0b34d58b6c32 ("drm/mgag200: Enable caching for SHMEM pages") commit 4862ffaec523 ("drm/mgag200: Move vmap out of commit tail") The first one changed the system memory framebuffer from Write-Combine to the default caching. Before the second commit, the mgag200 driver used to unmap the framebuffer after each frame, which implicitly does a cache flush. Both regressions are fixed by this commit, which restore WC mapping for the framebuffer in system memory, and add a cache flush. This is only needed on x86_64, for low-latency workload, so the new kconfig DRM_MGAG200_IOBURST_WORKAROUND depends on PREEMPT_RT and X86. For more context, the whole thread can be found here [1] Signed-off-by: Jocelyn Falempe Link: https://lore.kernel.org/dri-devel/20231019135655.313759-1-jfalempe@redhat.com/ # 1 Acked-by: Thomas Zimmermann Link: https://patchwork.freedesktop.org/patch/msgid/20240208095125.377908-1-jfalempe@redhat.com

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

Merge tag 'i2c-for-6.8-rc1-rebased' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux

2024-01-19T01:29:01+00:00

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 ...

drm: remove I2C_CLASS_DDC support

2024-01-18T20:10:41+00:00

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 Acked-by: Dmitry Baryshkov Acked-by: Harry Wentland Acked-by: Heiko Stuebner Acked-by: Jani Nikula Acked-by: Jernej Skrabec Reviewed-by: Thomas Zimmermann Reviewed-by: Andi Shyti Reviewed-by: AngeloGioacchino Del Regno Reviewed-by: Neil Armstrong Signed-off-by: Heiner Kallweit Signed-off-by: Wolfram Sang

drm/mgag200: convert get modes to struct drm_edid

2024-01-08T10:37:46+00:00

Convert mgag200_vga_connector_helper_get_modes() to use struct drm_edid based functions directly. Suggested-by: Thomas Zimmermann Signed-off-by: Jani Nikula Reviewed-by: Thomas Zimmermann Link: https://patchwork.freedesktop.org/patch/msgid/19a453c725fc27bd890f8fc73104f43a376dfce0.1704473654.git.jani.nikula@intel.com

drm/mgag200: Fix caching setup for remapped video memory

2024-01-08T08:59:47+00:00

I/O video memory for the framebuffer supports write-combine caching mode. Simplify the driver's code that sets up the caching mode. * Map video memory with ioremap_wc(), which automatically sets up the PAT entry with write-combine caching. * Remove the now obsolete call to devm_arch_io_reserve_memtype_wc(). It is only required to mmap the video memory to user space, which the driver doesn't do. * According to the PAT documentation, arch_phys_wc_add() is best called after remapping I/O memory, so move it after ioremap. Signed-off-by: Thomas Zimmermann Reviewed-by: Jocelyn Falempe Link: https://patchwork.freedesktop.org/patch/msgid/20240105082714.21881-1-tzimmermann@suse.de

drm/mgag200: Fix gamma lut not initialized for G200ER, G200EV, G200SE

2023-12-20T12:26:57+00:00

When mgag200 switched from simple KMS to regular atomic helpers, the initialization of the gamma settings was lost. This leads to a black screen, if the bios/uefi doesn't use the same pixel color depth. This has been fixed with commit ad81e23426a6 ("drm/mgag200: Fix gamma lut not initialized.") for most G200, but G200ER, G200EV, G200SE use their own version of crtc_helper_atomic_enable() and need to be fixed too. Fixes: 1baf9127c482 ("drm/mgag200: Replace simple-KMS with regular atomic helpers") Cc: #v6.1+ Reported-by: Roger Sewell Suggested-by: Roger Sewell Signed-off-by: Jocelyn Falempe Reviewed-by: Thomas Zimmermann Link: https://patchwork.freedesktop.org/patch/msgid/20231214163849.359691-1-jfalempe@redhat.com