Hi
Am 10.12.25 um 16:33 schrieb René Rebe:
Hallo,
On Wed, 10 Dec 2025 09:55:50 +0100, Thomas Zimmermann <[email protected]>
wrote:
...
Does that fix the color corruption?
Following your suggestions conversion does not want to just work:
root@XCODE_SPARC_T4_1:~# dmesg | tail
[ 105.444761] ast 0000:0a:00.0: AST 2200 detected
[ 105.444947] ast 0000:0a:00.0: [drm] dram MCLK=266 Mhz type=2
bus_width=32
[ 105.444963] ast 0000:0a:00.0: [drm] Using analog VGA
[ 105.445470] [drm] Initialized ast 0.1.0 for 0000:0a:00.0 on minor 0
[ 105.673289] ast 0000:0a:00.0: [drm] format BX24 little-endian
(0x34325842) not supported
[ 105.673302] ast 0000:0a:00.0: [drm] No compatible format found
[ 105.673348] ast 0000:0a:00.0: [drm] *ERROR* fbdev: Failed to setup
emulation (ret=-22)
[ 105.901306] ast 0000:0a:00.0: [drm] format BX24 little-endian
(0x34325842) not supported
[ 105.901319] ast 0000:0a:00.0: [drm] No compatible format found
[ 105.901350] ast 0000:0a:00.0: [drm] *ERROR* fbdev: Failed to setup
emulation (ret=-22)
Oh well...
There's a very simple patch attach. Does it fix the problem?
Yes, only leaving the hardcoded swapping from my patch liek this fixes
the byte-swapped output as expected on the sparc64 Sun T4.
Great.
How would you like me to go from here? Just use the chip_id to force
swapping and enable hw swapper for pre-AST2400 chips or fix the
generic format selection to work as you had suggested?
Does the ast_primary_plane_formats need to byte swapped formats for it
to work?
I'll send out a full patch that implements the byte swapping. Once
reviewed, it can be merged quickly. Can I add your Tested-by tag to the
patch?
Best regards
Thomas
Thanks for sticking with it!
René
Best regards
Thomas
--
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Frankenstr. 146, 90461 Nürnberg, Germany, www.suse.com
GF: Jochen Jaser, Andrew McDonald, Werner Knoblich, (HRB 36809, AG Nürnberg)
