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 3CA5B4C97; Tue, 11 Nov 2025 00:54:00 +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=1762822440; cv=none; b=iLLCW8Drk83lsFQuJGk30/fW0SCInPw5Xdtt3E9xp0OoI+Df2eYLXsdXUjNPRFkIwcC8dgvHBv2OsDsO4qj7Lk5kFZUNpXEP9qMhrCgstRfevqonxRnsiJTE1PYBMbt1FKjl2R7+gyHvdz86XkFjfrj1L4t1kKe/g9XBStEggHY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762822440; c=relaxed/simple; bh=n8qSX+iKrhLNMSYIzba2CZXdxdGIiB7OWS67vYvm3X4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=u9s1sRdpzzXHaVdyWSaLLxEn2wnB91muxBGLTV8rT2rsXs0PcEhkSYHWMj3kNhOEKh7urN+tRi6JNJFP3HKEzcnePIVl0ctEPfUo22g09GA5NM+iiWWFlKbRgfYSqNGeOiSSnlJviz+l6qPPOPfFAhq4wN8MHclpIXU3G/dYGWg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=TsQLPDyf; 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="TsQLPDyf" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9ECA2C4CEF5; Tue, 11 Nov 2025 00:53:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1762822439; bh=n8qSX+iKrhLNMSYIzba2CZXdxdGIiB7OWS67vYvm3X4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=TsQLPDyflF1lmWz5hB1VJ+53ReFUBHEksbZZQJ4jCTDsBb6Zt7xxvR9TvXR1tR9VM tb1QXiLXKXf/p4P4l2+pBZmk3KK/PZiOLOKAap8m0v+/Km1ZMKP1lseYegT/Jk8hOe vUw/+HVEmXlW0ZIlFGAdvKvunoGjDs/zV9+ttHd4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Matthew Schwartz , Harry Wentland , Mario Limonciello , Alex Deucher Subject: [PATCH 6.17 108/849] drm/amd/display: Dont program BLNDGAM_MEM_PWR_FORCE when CM low-power is disabled on DCN30 Date: Tue, 11 Nov 2025 09:34:38 +0900 Message-ID: <20251111004539.008021952@linuxfoundation.org> X-Mailer: git-send-email 2.51.2 In-Reply-To: <20251111004536.460310036@linuxfoundation.org> References: <20251111004536.460310036@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.17-stable review patch. If anyone has any objections, please let me know. ------------------ From: Matthew Schwartz commit 382bd6a792836875da555fe9a2b51222b813fed1 upstream. Before commit 33056a97ae5e ("drm/amd/display: Remove double checks for `debug.enable_mem_low_power.bits.cm`"), dpp3_program_blnd_lut(NULL) checked the low-power debug flag before calling dpp3_power_on_blnd_lut(false). After commit 33056a97ae5e ("drm/amd/display: Remove double checks for `debug.enable_mem_low_power.bits.cm`"), dpp3_program_blnd_lut(NULL) unconditionally calls dpp3_power_on_blnd_lut(false). The BLNDGAM power helper writes BLNDGAM_MEM_PWR_FORCE when CM low-power is disabled, causing immediate SRAM power toggles instead of deferring at vupdate. This can disrupt atomic color/LUT sequencing during transitions between direct scanout and composition within gamescope's DRM backend on Steam Deck OLED. To fix this, leave the BLNDGAM power state unchanged when low-power is disabled, matching dpp3_power_on_hdr3dlut and dpp3_power_on_shaper. Fixes: 33056a97ae5e ("drm/amd/display: Remove double checks for `debug.enable_mem_low_power.bits.cm`") Signed-off-by: Matthew Schwartz Reviewed-by: Harry Wentland Reviewed-by: Mario Limonciello Signed-off-by: Mario Limonciello Signed-off-by: Alex Deucher (cherry picked from commit 13ff4f63fcddfc84ec8632f1443936b00aa26725) Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/amd/display/dc/dpp/dcn30/dcn30_dpp.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/drivers/gpu/drm/amd/display/dc/dpp/dcn30/dcn30_dpp.c b/drivers/gpu/drm/amd/display/dc/dpp/dcn30/dcn30_dpp.c index 09be2a90cc79..4f569cd8a5d6 100644 --- a/drivers/gpu/drm/amd/display/dc/dpp/dcn30/dcn30_dpp.c +++ b/drivers/gpu/drm/amd/display/dc/dpp/dcn30/dcn30_dpp.c @@ -578,9 +578,6 @@ static void dpp3_power_on_blnd_lut( dpp_base->ctx->dc->optimized_required = true; dpp_base->deferred_reg_writes.bits.disable_blnd_lut = true; } - } else { - REG_SET(CM_MEM_PWR_CTRL, 0, - BLNDGAM_MEM_PWR_FORCE, power_on == true ? 0 : 1); } } -- 2.51.2