From: Nirmoy Das nirmoyd@nvidia.com
[ Upstream commit c7c31f8dc54aa3c9b2c994b5f1ff7e740a654e97 ]
The busy-waiting in `mdelay()` can cause CPU stalls and kernel timeouts during boot.
Signed-off-by: Nirmoy Das nirmoyd@nvidia.com Reviewed-by: Thomas Zimmermann tzimmermann@suse.de Tested-by: Carol L Soto csoto@nvidia.commailto:csoto@nvidia.com Fixes: 594e9c04b586 ("drm/ast: Create the driver for ASPEED proprietory Display-Port") Cc: KuoHsiang Chou kuohsiang_chou@aspeedtech.com Cc: Thomas Zimmermann tzimmermann@suse.de Cc: Dave Airlie airlied@redhat.com Cc: Jocelyn Falempe jfalempe@redhat.com Cc: dri-devel@lists.freedesktop.org Cc: stable@vger.kernel.org # v5.19+ Signed-off-by: Thomas Zimmermann tzimmermann@suse.de Link: https://lore.kernel.org/r/20250917194346.2905522-1-nirmoyd@nvidia.com [ Applied change to ast_astdp_read_edid() instead of ast_astdp_read_edid_block() ] Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/ast/ast_dp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/ast/ast_dp.c b/drivers/gpu/drm/ast/ast_dp.c index c6f226b6f0813..fc9c36c8b81b9 100644 --- a/drivers/gpu/drm/ast/ast_dp.c +++ b/drivers/gpu/drm/ast/ast_dp.c @@ -62,7 +62,7 @@ int ast_astdp_read_edid(struct drm_device *dev, u8 *ediddata) * of right-click of mouse. * 2. The Delays are often longer a lot when system resume from S3/S4. */ - mdelay(j+1); + msleep(j + 1);
if (!(ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xD1, ASTDP_MCU_FW_EXECUTING) &&