From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 1F0A7492E35; Sat, 12 Sep 2026 19:00:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789239661; cv=none; b=BgTGIeZMfsU1HuhiuV3xzNB5GFNhGPuHixOJ+EWdBvNmhVphp/fEKz7whMtb/v9uUgWwBFYbD5KzePpB1kgZHJ/2jFDbob02vNWh4L3CI3tGYQ+aI07S7jPxmkkwx2HTUz7xxoPcTE4TZfZR5sFA4/iyw52dKDxXiwdXlJ5ijMY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789239661; c=relaxed/simple; bh=x97DxZXH5+FYqM+/C+bxng9qQ2lppV6KL8STP2tAKuk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=VIxEBvXCZ0T0eKQhPYGFP/3UghO15NoPFJL2vrBDuZ1nYUMJEjDxt0ROtcXZzJGwjufDMpLQygWgPS+0e3ksjp2ZK9v3OrerXm0tX+N3iQ90hl8b9EWidICT4pxG8kiFAZy6DjAVRmCr/qAIcNeYIf4p+lnv5Ir+cMgAI8Je0zk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=pa+dOgWK; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="pa+dOgWK" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E69A91F00898; Sat, 12 Sep 2026 19:00:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789239653; bh=V/O25ioDA3XPyzgY3eVfdOxBsu067x4J3ry5I7u6Q8w=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=pa+dOgWKoNGBa9HdnW6Vl3m5hZ1aE7Mu36Hy1ab3pJR3IaSQdri9eBMlAT/t4azL4 QYPObkgFNlZviWmHUTB3DMK9PX4pPJvkmAEVFN2UD2Wes+bqgOnzffFaU9L62AxrXA 5ks9UX3LZa7+2LpB0B90VYwnMjuqZ2mgObQ1Soc0= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Jernej Skrabec , Chen-Yu Tsai , Sasha Levin Subject: [PATCH 5.15 707/935] drm/sun4i: vi scaler: Fix coefficient selection Date: Sat, 12 Sep 2026 09:02:17 +0200 Message-ID: <20260912065543.051426080@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260912065526.833703348@linuxfoundation.org> References: <20260912065526.833703348@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 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jernej Skrabec [ Upstream commit 5c31990b21f0b535732deb2b658b78b07464f56c ] Currently, vertical coefficients are selected based on horizontal scaling, which is wrong. Additionally, chroma coefficients should be selected based on format subsampling. Fix all that. Fixes: b862a648de3b ("drm/sun4i: Add support for HW scaling to DE2") Signed-off-by: Jernej Skrabec Reviewed-by: Chen-Yu Tsai Link: https://patch.msgid.link/263a4a41442a3c8b072b170256b72658f1b90802.1785772659.git.jernej.skrabec@gmail.com Signed-off-by: Chen-Yu Tsai Signed-off-by: Sasha Levin --- drivers/gpu/drm/sun4i/sun8i_vi_scaler.c | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/sun4i/sun8i_vi_scaler.c b/drivers/gpu/drm/sun4i/sun8i_vi_scaler.c index 7ba75011adf9f..328b84df2ee5e 100644 --- a/drivers/gpu/drm/sun4i/sun8i_vi_scaler.c +++ b/drivers/gpu/drm/sun4i/sun8i_vi_scaler.c @@ -891,20 +891,26 @@ static void sun8i_vi_scaler_set_coeff(struct regmap *map, u32 base, lan3coefftab32_left[offset + i]); regmap_write(map, SUN8I_SCALER_VSU_YHCOEFF1(base, i), lan3coefftab32_right[offset + i]); + } + offset = sun8i_vi_scaler_coef_index(vstep) * + SUN8I_VI_SCALER_COEFF_COUNT; + for (i = 0; i < SUN8I_VI_SCALER_COEFF_COUNT; i++) + regmap_write(map, SUN8I_SCALER_VSU_YVCOEFF(base, i), + lan2coefftab32[offset + i]); + + offset = sun8i_vi_scaler_coef_index(hstep / format->hsub) * + SUN8I_VI_SCALER_COEFF_COUNT; + for (i = 0; i < SUN8I_VI_SCALER_COEFF_COUNT; i++) { regmap_write(map, SUN8I_SCALER_VSU_CHCOEFF0(base, i), ch_left[offset + i]); regmap_write(map, SUN8I_SCALER_VSU_CHCOEFF1(base, i), ch_right[offset + i]); } - - offset = sun8i_vi_scaler_coef_index(hstep) * + offset = sun8i_vi_scaler_coef_index(vstep / format->vsub) * SUN8I_VI_SCALER_COEFF_COUNT; - for (i = 0; i < SUN8I_VI_SCALER_COEFF_COUNT; i++) { - regmap_write(map, SUN8I_SCALER_VSU_YVCOEFF(base, i), - lan2coefftab32[offset + i]); + for (i = 0; i < SUN8I_VI_SCALER_COEFF_COUNT; i++) regmap_write(map, SUN8I_SCALER_VSU_CVCOEFF(base, i), cy[offset + i]); - } } void sun8i_vi_scaler_enable(struct sun8i_mixer *mixer, int layer, bool enable) -- 2.53.0