kernel/linux.git/drivers/gpu/drm/ast/ast_post.c, branch linux-7.0.y

drm/ast: Split ast_set_def_ext_reg() by chip generation

2025-07-09T12:36:21+00:00

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 Gen2+ and Gen1 POST code to separate source files

2025-07-09T12:36:18+00:00

Move POST code for Gen2+ and Gen1 to separate source files and hide it in ast_2100_post() ans ast_2000_post(). With P2A configuration, the POST logic for these chip generations has been mingled in ast_init_dram_reg(). Hence, handle all generations in a single change. The split simplifies both cases. Also move the DRAM init tables for each Gen into the respective source file. No changes to the overall logic. Signed-off-by: Thomas Zimmermann Reviewed-by: Jocelyn Falempe Link: https://lore.kernel.org/r/20250706162816.211552-6-tzimmermann@suse.de

drm/ast: Move Gen4+ POST code to separate source file

2025-07-09T12:36:17+00:00

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

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

2025-07-09T12:36:14+00:00

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

drm/ast: Move Gen7+ POST code to separate source file

2025-07-09T12:36:13+00:00

Move POST code for Gen7+ to separate source file and hide it in ast_2600_post(). There's not much going on here except for enabling the DP transmitter chip. v2: - simplify logic (Jocelyn) Signed-off-by: Thomas Zimmermann Reviewed-by: Jocelyn Falempe Link: https://lore.kernel.org/r/20250706162816.211552-3-tzimmermann@suse.de

drm/ast: Declare helpers for POST in header

2025-07-09T12:36:12+00:00

Provide POST helpers in header file before splitting up the AST POST code. Signed-off-by: Thomas Zimmermann Reviewed-by: Jocelyn Falempe Link: https://lore.kernel.org/r/20250706162816.211552-2-tzimmermann@suse.de

drm/ast: Replace AST_VIDMEM_SIZE_ with Linux SZ_ constants

2025-03-12T07:38:09+00:00

Ast's AST_VIDMEM_SIZE_ constants enumerate supported video-memory sizes from 8 MiB to 128 MiB. Replace them with Linux' SZ_ constants of the same value. When expanded, the literal values remain the same. The size constant for 128 MiB is unused and the default size is not necessary. Remove both of them. Signed-off-by: Thomas Zimmermann Reviewed-by: Jocelyn Falempe Link: https://patchwork.freedesktop.org/patch/msgid/20250305163207.267650-2-tzimmermann@suse.de

drm/ast: Align naming in widescreen detection code to manual

2025-02-03T13:01:04+00:00

Rename variables and register constants to align with the programming manual. Add new constants where necessary. Signed-off-by: Thomas Zimmermann Reviewed-by: Jocelyn Falempe Link: https://patchwork.freedesktop.org/patch/msgid/20250131092257.115596-3-tzimmermann@suse.de

drm/ast: Initialize ASTDP in ast_post_gpu()

2025-01-22T12:52:49+00:00

Remove the call to ast_dp_launch() from ast_detect_tx_chip() and perform it unconditionally in ast_post_gpu(). Also add error handling: the detection code apparently used ast_dp_launch() to test for a working ASTDP, falling back to VGA on errors. As the VBIOS reports ASTDP, silently ignoring errors is questionable behavior. With the refactoring, failing to initialize the ASTDP will also fail probing the driver. Signed-off-by: Thomas Zimmermann Reviewed-by: Jocelyn Falempe Link: https://patchwork.freedesktop.org/patch/msgid/20250117103450.28692-5-tzimmermann@suse.de

drm/ast: Refactor ast_post_gpu() by Gen

2025-01-22T12:52:48+00:00

Reorganize ast_post_gpu() so that it first branches by Gen and then by config mode and TX chip. This will later make it possible to split up the function by Gen. The helper ast_init_3rdtx() only handles Gen4 and Gen5, so leave it out from the other Gens. Signed-off-by: Thomas Zimmermann Reviewed-by: Jocelyn Falempe Link: https://patchwork.freedesktop.org/patch/msgid/20250117103450.28692-4-tzimmermann@suse.de