Thomas Zimmermann dfff99cb56 drm/ast: Acquire I/O-register lock in DDC code ... The modeset lock protects the DDC code from concurrent modeset operations, which use the same registers. Move that code from the connector helpers into the DDC helpers .pre_xfer() and .post_xfer(). Both, .pre_xfer() and .post_xfer(), enclose the transfer of data blocks over the I2C channel in the internal I2C function bit_xfer(). Both calls are executed unconditionally if present. Invoking DDC transfers from any where within the driver now takes the lock. Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Sui Jingfeng <sui.jingfeng@linux.dev> Reviewed-by: Jocelyn Falempe <jfalempe@redhat.com> Tested-by: Sui Jingfeng <sui.jingfeng@linux.dev> Link: https://patchwork.freedesktop.org/patch/msgid/20240325200855.21150-11-tzimmermann@suse.de		2024-04-02 10:40:50 +02:00
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ast_ddc.c	drm/ast: Acquire I/O-register lock in DDC code	2024-04-02 10:40:50 +02:00
ast_ddc.h	drm/ast: Store AST device in struct ast_ddc	2024-04-02 10:40:49 +02:00
ast_dp501.c	drm/ast: Rename AST_IO_CRTC_PORT to AST_IO_VGACRI	2023-10-19 13:55:33 +02:00
ast_dp.c	drm/ast: Rename AST_IO_CRTC_PORT to AST_IO_VGACRI	2023-10-19 13:55:33 +02:00
ast_dram_tables.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
ast_drv.c	drm/ast: Include <linux/of.h> where necessary	2024-04-02 10:40:43 +02:00
ast_drv.h	drm/ast: Move DDC code to ast_ddc.{c,h}	2024-04-02 10:40:46 +02:00
ast_main.c	drm/ast: Include <linux/of.h> where necessary	2024-04-02 10:40:43 +02:00
ast_mm.c	drm/ast: Rename AST_IO_CRTC_PORT to AST_IO_VGACRI	2023-10-19 13:55:33 +02:00
ast_mode.c	drm/ast: Acquire I/O-register lock in DDC code	2024-04-02 10:40:50 +02:00
ast_post.c	drm/ast: Partially implement POST without ast device instance	2023-11-28 16:17:08 +01:00
ast_reg.h	drm/ast: Enable MMIO without ast device instance	2023-11-28 16:17:08 +01:00
ast_tables.h	drm/ast: Add resolution support for 1152x864@75	2022-09-20 10:19:32 +02:00
Kconfig	drm: Only select I2C_ALGOBIT for drivers that actually need it	2023-01-10 11:15:44 +01:00
Makefile	drm/ast: Move DDC code to ast_ddc.{c,h}	2024-04-02 10:40:46 +02:00