kernel.git/drivers/gpu/drm/ast/ast_2500.c, branch linux-rolling-stable

drm/ast: Store precatch settings in struct ast_device_quirks

2025-10-15T07:59:44Z

Add a precatch flag in struct ast_device_info and set it on AST2500 and AST2600. Remove calls to IS_AST_GENn() from ast_set_crtc_reg(). Also fix the coding style in several places. Signed-off-by: Thomas Zimmermann Reviewed-by: Jocelyn Falempe Link: https://lore.kernel.org/r/20251007150343.273718-5-tzimmermann@suse.de

drm/ast: Store CRTC memory request threshold in device quirks

2025-10-15T07:59:43Z

Store each hardware's CRTC memory threshold in the specific instance of struct ast_device_quirks. Removes the calls to IS_AST_GENn() from ast_set_crtthd_reg(). The values stored in the registers appear to be plain limits. Hence write them in the driver in decimal format instead of hexadecimal. Signed-off-by: Thomas Zimmermann Reviewed-by: Jocelyn Falempe Link: https://lore.kernel.org/r/20251007150343.273718-4-tzimmermann@suse.de

drm/ast: Support device quirks

2025-10-15T07:59:41Z

Define struct ast_device_quirks and add an instance for each hardware generation. The type will provide information about per-gen constants and oddities. Signed-off-by: Thomas Zimmermann Reviewed-by: Jocelyn Falempe > Link: https://lore.kernel.org/r/20251007150343.273718-3-tzimmermann@suse.de

drm/ast: Store DRAM clock table in struct ast_device

2025-10-15T07:59:40Z

Init the new field dclk_table in struct ast_device to the per-gen table of DRAM clock parameters. Use the field during modesetting. The table is static, so a setup is only required once. Removes the call to IS_AST_GEN() from the atomic commit's code path. Signed-off-by: Thomas Zimmermann Reviewed-by: Jocelyn Falempe Link: https://lore.kernel.org/r/20251007150343.273718-2-tzimmermann@suse.de

drm/ast: Move Gen6 device initialization into separate helper

2025-09-29T11:28:15Z

Split off device initialization for Gen6 hardware into the helpers ast_2500_device_create() and ast_2500_detect_wide_screen(). The new functions are duplicates of their counterparts in ast_main.c, but stripped from most non-Gen6 support. Simplifies maintenance as the driver's number of supported hardware generations grows. v2: - simplify widescreen-detection logic Signed-off-by: Thomas Zimmermann Reviewed-by: Jocelyn Falempe Link: https://lore.kernel.org/r/20250922083708.45564-11-tzimmermann@suse.de

drm/ast: Move display-clock tables to per-Gen source files

2025-09-29T11:28:07Z

Move display-clock tables to the appropriate per-Gen source files. The tables are almost identical, except for mode entries 0x17 and 0x1a. Rename to tables to match common style. Signed-off-by: Thomas Zimmermann Reviewed-by: Jocelyn Falempe Link: https://lore.kernel.org/r/20250922083708.45564-2-tzimmermann@suse.de

drm/ast: Split ast_set_def_ext_reg() by chip generation

2025-07-09T12:36:21Z

Duplicate ast_set_def_ext_reg() for individual chip generations and move call it into per-chip source files. Remove the original code. AST2100 and AST2500 reuse the function from earlier chips. AST2600 appears to be incorrect as it uses an older function. Keep this behavior for now. Signed-off-by: Thomas Zimmermann Reviewed-by: Jocelyn Falempe Link: https://lore.kernel.org/r/20250706162816.211552-9-tzimmermann@suse.de

drm/ast: Move Gen6+ POST code to separate source file

2025-07-09T12:36:14Z

Move POST code for Gen6+ to separate source file and hide it in ast_2500_post(). With P2A configuration, it performs a full board POST; otherwise it enables the transmitter chip. No changes to the overall logic. Signed-off-by: Thomas Zimmermann Reviewed-by: Jocelyn Falempe Link: https://lore.kernel.org/r/20250706162816.211552-4-tzimmermann@suse.de