Re: [PATCH for 6.12 3/9] drm/amd/display: Disable fastboot on DCE 6 too

Timur Kristóf
2026-03-30T13:16:31Z

On Friday, March 27, 2026 12:47:10 AM Central European Summer Time Rosen Penev
wrote:
> From: Timur Kristóf <timur.kristof@gmail.com>
>
> [ Upstream commit 7495962cbceb967e095233a5673ea71f3bcdee7e ]
>
> It already didn't work on DCE 8,
> so there is no reason to assume it would on DCE 6.
>
> Signed-off-by: Timur Kristóf <timur.kristof@gmail.com>
> Reviewed-by: Rodrigo Siqueira <siqueira@igalia.com>
> Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
> Reviewed-by: Alex Hung <alex.hung@amd.com>
> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
> Signed-off-by: Rosen Penev <rosenp@gmail.com>

This patch is incorrect and should not be backported.

(Note that the error is already fixed upstream. For stable kernels IMO it's
best to drop this one.)

> ---
> drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.c | 6 ++----
> 1 file changed, 2 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.c
> b/drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.c index
> df69e0cebf78..7dc99c85b8ea 100644
> --- a/drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.c
> +++ b/drivers/gpu/drm/amd/display/dc/hwss/dce110/dce110_hwseq.c
> @@ -1910,10 +1910,8 @@ void dce110_enable_accelerated_mode(struct dc *dc,
> struct dc_state *context)
>
> get_edp_streams(context, edp_streams, &edp_stream_num);
>
> - // Check fastboot support, disable on DCE8 because of blank
screens
> - if (edp_num && edp_stream_num && dc->ctx->dce_version !=
DCE_VERSION_8_0
> && - dc->ctx->dce_version != DCE_VERSION_8_1 &&
> - dc->ctx->dce_version != DCE_VERSION_8_3) {
> + /* Check fastboot support, disable on DCE 6-8 because of blank
screens */
> + if (edp_num && edp_stream_num && dc->ctx->dce_version <
DCE_VERSION_10_0)
> { for (i = 0; i < edp_num; i++) {
> edp_link = edp_links[i];
> if (edp_link != edp_streams[0]->link)