kernel.git/drivers/gpu/drm/ast/ast_2300.c, branch linux-rolling-stable

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 Gen4 device initialization into separate helper

2025-09-29T11:28:13Z

Split off device initialization for Gen4 hardware into the helpers ast_2300_device_create() and ast_2300_detect_wide_screen(). The new functions are duplicates of their counterparts in ast_main.c, but stripped from most non-Gen4 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/20250922083708.45564-9-tzimmermann@suse.de

drm/ast: Split ast_detect_tx_chip() per chip generation

2025-09-29T11:28:09Z

Gen4 and later models detect the TX chip from VGACRD1, while earlier models detect from VGACRA3. Split up the detection helper into two separate helpers. Use SZ_ constants instead of plain numbers. Then inline the call into its only caller ast_device_create(). When ast_device_create() gets split up per Gen, either call will remain. Signed-off-by: Thomas Zimmermann Reviewed-by: Jocelyn Falempe Link: https://lore.kernel.org/r/20250922083708.45564-4-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 Gen4+ POST code to separate source file

2025-07-09T12:36:17Z

Move POST code for Gen4+ to separate source file and hide it in ast_2300_post(). With P2A configuration, it performs a full board POST and enables the transmitter chip; otherwise it only enables the transmitter chip. Also fix coding style in several places. No changes to the overall logic. Signed-off-by: Thomas Zimmermann Reviewed-by: Jocelyn Falempe Link: https://lore.kernel.org/r/20250706162816.211552-5-tzimmermann@suse.de