The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
To reproduce the conflict and resubmit, you may use the following commands:
git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x e1e75cf7334c0e31f4c37d715b964784d45685fa # <resolve conflicts, build, test, etc.> git commit -s git send-email --to 'stable@vger.kernel.org' --in-reply-to '2024081206-overbuilt-challenge-afab@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^..
Possible dependencies:
e1e75cf7334c ("drm/amd/display: Program CURSOR_DST_X_OFFSET in viewport space") ee8287e068a3 ("drm/amd/display: Fix cursor issues with ODMs and HW rotations") 319d4615518c ("drm/amd/display: mirror case cleanup for cursors") dd9d8c61ccff ("drm/amd/display: Minor cleanup for DCN401 cursor related code") ed79ab5a07c1 ("drm/amd/display: DCN401 cusor code update") 827416d45476 ("drm/amd/display: Fix multiple cursors when using 4 displays on a contiguous large surface") c2edec1676ca ("drm/amd/display: Fix incorrect cursor position for dcn401") 44b9a7cfc035 ("drm/amd/display: Fix ODM + underscan case with cursor") 70839da63605 ("drm/amd/display: Add new DCN401 sources")
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From e1e75cf7334c0e31f4c37d715b964784d45685fa Mon Sep 17 00:00:00 2001 From: Alvin Lee alvin.lee2@amd.com Date: Thu, 13 Jun 2024 16:10:16 -0400 Subject: [PATCH] drm/amd/display: Program CURSOR_DST_X_OFFSET in viewport space
[WHAT & HOW] According to register specifications, the CURSOR_DST_X_OFFSET is relative to the start of the data viewport, not RECOUT space. In this case we must transform the cursor coordinates passed to hubp401_cursor_set_position into viewport space to program this register. This fixes an underflow issue that occurs in scaled mode with low refresh rate.
Reviewed-by: Nevenko Stupar nevenko.stupar@amd.com Cc: Mario Limonciello mario.limonciello@amd.com Cc: Alex Deucher alexander.deucher@amd.com Cc: stable@vger.kernel.org Signed-off-by: Alex Hung alex.hung@amd.com Signed-off-by: Alvin Lee alvin.lee2@amd.com Tested-by: Daniel Wheeler daniel.wheeler@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com
diff --git a/drivers/gpu/drm/amd/display/dc/hubp/dcn401/dcn401_hubp.c b/drivers/gpu/drm/amd/display/dc/hubp/dcn401/dcn401_hubp.c index a893160ae775..3f9ca9b40949 100644 --- a/drivers/gpu/drm/amd/display/dc/hubp/dcn401/dcn401_hubp.c +++ b/drivers/gpu/drm/amd/display/dc/hubp/dcn401/dcn401_hubp.c @@ -656,7 +656,9 @@ void hubp401_cursor_set_position( int y_pos = pos->y - param->recout.y; int rec_x_offset = x_pos - pos->x_hotspot; int rec_y_offset = y_pos - pos->y_hotspot; - uint32_t dst_x_offset; + int dst_x_offset; + int x_pos_viewport = x_pos * param->viewport.width / param->recout.width; + int x_hot_viewport = pos->x_hotspot * param->viewport.width / param->recout.width; uint32_t cur_en = pos->enable ? 1 : 0;
hubp->curs_pos = *pos; @@ -668,7 +670,13 @@ void hubp401_cursor_set_position( if (hubp->curs_attr.address.quad_part == 0) return;
- dst_x_offset = (rec_x_offset >= 0) ? rec_x_offset : 0; + /* Translate the x position of the cursor from rect + * space into viewport space. CURSOR_DST_X_OFFSET + * is the offset relative to viewport start position. + */ + dst_x_offset = x_pos_viewport - x_hot_viewport * + (1 + hubp->curs_attr.attribute_flags.bits.ENABLE_MAGNIFICATION); + dst_x_offset = (dst_x_offset >= 0) ? dst_x_offset : 0; dst_x_offset *= param->ref_clk_khz; dst_x_offset /= param->pixel_clk_khz;