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drm/ast: Set DDC timeout in milliseconds

Compute the i2c timeout in jiffies from a value in milliseconds. The
original values of 2 jiffies equals 2 milliseconds if HZ has been
configured to a value of 1000. This corresponds to 2.2 milliseconds
used by most other DRM drivers. Update ast accordingly.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Fixes: 312fec1405dd ("drm: Initial KMS driver for AST (ASpeed Technologies) 2000 series (v2)")
Cc: Dave Airlie <airlied@redhat.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maxime Ripard <mripard@kernel.org>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Jocelyn Falempe <jfalempe@redhat.com>
Cc: dri-devel@lists.freedesktop.org
Cc: <stable@vger.kernel.org> # v3.5+
Reviewed-by: Jocelyn Falempe <jfalempe@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240403103325.30457-2-tzimmermann@suse.de

Thomas Zimmermann c0cd6925 fe6660b6

+1 -1
+1 -1
drivers/gpu/drm/ast/ast_ddc.c
··· 153 153 154 154 bit = &ddc->bit; 155 155 bit->udelay = 20; 156 - bit->timeout = 2; 156 + bit->timeout = usecs_to_jiffies(2200); 157 157 bit->data = ddc; 158 158 bit->setsda = ast_ddc_algo_bit_data_setsda; 159 159 bit->setscl = ast_ddc_algo_bit_data_setscl;