From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id F0CCB221719; Tue, 29 Apr 2025 17:42:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745948543; cv=none; b=kNEnHJkCWGuT6OqKKNmpehKAVjzS+SRtRiWGMuTKz+AlObdFjcK0vvuNbg2mnV5OvVRwF42CNq7+/RPUSuZfEb4VznOfMQDj76owTpbdD0yx0evWbyqse7AIjFpOmNUjmcuh8eN7ApKyQjeDRALeyQSu8MSif8IHiwOZZhvASLg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1745948543; c=relaxed/simple; bh=jemcAf6RbPFu92XUCmgC3sSJoJS1jzbe5tZ4mG/zCfw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=nPrnW7W+FmZtVfSr7swpndGS3UN8P3AFaakfCfgu7w54eaWtcwRJeu+lwLkVxZEyuGzsxvt+t3gat7dFvigOAqV1u635eIaSvgvElxGbX/lWoHXOkg7JA0Sng2dWAialed2i9sTNOd8ygeVSt0FCqYDvYq+YZ/Km8gDZQ/vAVNk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=GaD2Icmb; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="GaD2Icmb" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 24829C4CEE3; Tue, 29 Apr 2025 17:42:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1745948542; bh=jemcAf6RbPFu92XUCmgC3sSJoJS1jzbe5tZ4mG/zCfw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GaD2IcmbgixO5oK7jDSL8CWkvIGU3+xilCIgf/nVgBLiZajP0rAgIEqQ4JnRHfsl8 F9L1pa+zqzkckI5a2mYfZW1OYXNAeSbZY6LANhRnCeHq6oG4zpKB9H7rzeAJI0LVHf rWNOZ9TzhJuqHlK3wR1xUy7BAxBx1pjfimW5NBp8= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Nicholas Kazlauskas , Zhikai Zhai , Zaeem Mohamed , Daniel Wheeler , Alex Deucher , Sasha Levin Subject: [PATCH 5.15 040/373] drm/amd/display: Update Cursor request mode to the beginning prefetch always Date: Tue, 29 Apr 2025 18:38:37 +0200 Message-ID: <20250429161124.777943309@linuxfoundation.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250429161123.119104857@linuxfoundation.org> References: <20250429161123.119104857@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Zhikai Zhai [ Upstream commit 4a4077b4b63a8404efd6d37fc2926f03fb25bace ] [Why] The double buffer cursor registers is updated by the cursor vupdate event. There is a gap between vupdate and cursor data fetch if cursor fetch data reletive to cursor position. Cursor corruption will happen if we update the cursor surface in this gap. [How] Modify the cursor request mode to the beginning prefetch always and avoid wraparound calculation issues. Reviewed-by: Nicholas Kazlauskas Signed-off-by: Zhikai Zhai Signed-off-by: Zaeem Mohamed Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- .../amd/display/dc/dcn10/dcn10_hw_sequencer.c | 22 ++++++++----------- .../gpu/drm/amd/display/dc/dcn31/dcn31_hubp.c | 2 +- 2 files changed, 10 insertions(+), 14 deletions(-) diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c index bc603c8af3b66..b31c31c39783f 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c +++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c @@ -1838,20 +1838,11 @@ static void delay_cursor_until_vupdate(struct dc *dc, struct pipe_ctx *pipe_ctx) dc->hwss.get_position(&pipe_ctx, 1, &position); vpos = position.vertical_count; - /* Avoid wraparound calculation issues */ - vupdate_start += stream->timing.v_total; - vupdate_end += stream->timing.v_total; - vpos += stream->timing.v_total; - if (vpos <= vupdate_start) { /* VPOS is in VACTIVE or back porch. */ lines_to_vupdate = vupdate_start - vpos; - } else if (vpos > vupdate_end) { - /* VPOS is in the front porch. */ - return; } else { - /* VPOS is in VUPDATE. */ - lines_to_vupdate = 0; + lines_to_vupdate = stream->timing.v_total - vpos + vupdate_start; } /* Calculate time until VUPDATE in microseconds. */ @@ -1859,13 +1850,18 @@ static void delay_cursor_until_vupdate(struct dc *dc, struct pipe_ctx *pipe_ctx) stream->timing.h_total * 10000u / stream->timing.pix_clk_100hz; us_to_vupdate = lines_to_vupdate * us_per_line; + /* Stall out until the cursor update completes. */ + if (vupdate_end < vupdate_start) + vupdate_end += stream->timing.v_total; + + /* Position is in the range of vupdate start and end*/ + if (lines_to_vupdate > stream->timing.v_total - vupdate_end + vupdate_start) + us_to_vupdate = 0; + /* 70 us is a conservative estimate of cursor update time*/ if (us_to_vupdate > 70) return; - /* Stall out until the cursor update completes. */ - if (vupdate_end < vupdate_start) - vupdate_end += stream->timing.v_total; us_vupdate = (vupdate_end - vupdate_start + 1) * us_per_line; udelay(us_to_vupdate + us_vupdate); } diff --git a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hubp.c b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hubp.c index 127055044cf1a..faab14e343a4e 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hubp.c +++ b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hubp.c @@ -44,7 +44,7 @@ void hubp31_set_unbounded_requesting(struct hubp *hubp, bool enable) struct dcn20_hubp *hubp2 = TO_DCN20_HUBP(hubp); REG_UPDATE(DCHUBP_CNTL, HUBP_UNBOUNDED_REQ_MODE, enable); - REG_UPDATE(CURSOR_CONTROL, CURSOR_REQ_MODE, enable); + REG_UPDATE(CURSOR_CONTROL, CURSOR_REQ_MODE, 1); } void hubp31_soft_reset(struct hubp *hubp, bool reset) -- 2.39.5