[PATCH v4 0/3] Fixes and enhancements for Exynos (7870) DSIM bridge driver
Kaustabh Chakraborty <[email protected]>
| Newsgroups | gmane.linux.kernel.stable,gmane.comp.video.dri.devel,gmane.linux.kernel,gmane.linux.ports.arm.kernel,gmane.linux.kernel.samsung-soc |
|---|---|
| Message-ID | <[email protected]> |
Since v6.17, there is a regression for the Exynos 7870 DSIM driver. The display occasionally had random aberration when the panel was turned on. The first patch addresses that. The second patch replaces an implicit loop for waiting for PLL stabilization with an interrupt-based solution, which should be more reliable. This solution was suggested by Inki Dae in a discussion of an earlier patch series sent by me. For further details, refer to its commit description. Signed-off-by: Kaustabh Chakraborty <[email protected]> --- Changes in v4: - Clarify active-hight MFLUSH_VS in code comment (Luca Seresoli) - Move aperture_remove_all_conflicting_devices() before component_bind_all() (Sashiko) - Change `timeout` type to unsigned long (Inki Dae) - Correct typo s/Calcutate/Calculate (Inki Dae) - Correct inverted condition waiting for PLL stable completion (Inki Dae) - Do not exclusively conclude IRQ routine for PLL_STABLE interrupt (Inki Dae) - Explicitly enable PLL_STABLE and SW_RST_RELEASE interrupts during reset action (Inki Dae) - Wait for SW_RST_RELEASE interrupt before setting up clock (Inki Dae) - Fall back to bit testing for PLL stabilization when timed out - Link to v3: https://patch.msgid.link/[email protected] Changes in v3: - Add patch for removing conflicting devices for DRM (Sam Day) - Link to v2: https://lore.kernel.org/r/[email protected] Changes in v2: - drop now-not-required [v1 1/3] (Marek Szyprowski) - Link to v1: https://lore.kernel.org/r/[email protected] --- Kaustabh Chakraborty (3): drm/bridge: samsung-dsim: enable MFLUSH_VS for Exynos 7870 DSIM drm/bridge: samsung-dsim: use DSIM interrupt to wait for PLL stability drm/exynos: remove simplefb nodes before init drivers/gpu/drm/bridge/samsung-dsim.c | 56 +++++++++++++++++++++++++-------- drivers/gpu/drm/exynos/exynos_drm_drv.c | 6 ++++ include/drm/bridge/samsung-dsim.h | 1 + 3 files changed, 50 insertions(+), 13 deletions(-) --- base-commit: 290aaf24a551d5a0dce037e3fab30820f9113a10 change-id: 20260124-exynos-dsim-fixes-5383d6a6f073 Best regards, -- Kaustabh Chakraborty <[email protected]>