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 BD4A542885F; Sat, 12 Sep 2026 12:48:22 +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=1789217303; cv=none; b=XANetMEm4A4qacyM+MVYgKKLdO2qm0GaEslUbTwOGI6MPR487xOjq+i2oUoCEaIZ7wm8xH5J5PV2iZhuN0iQHl/MjlEeJJJU6wtof10oAFKdxEVVRGQzEn7HZgz36S6YXM0cax+jMXgnxGKMFC6fPeGAin53gXjINRLqADax/PE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789217303; c=relaxed/simple; bh=5zcGMCAZi0BwDbrlGs5DtvcT6BPOkSZyWWBjF9Q6wA0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=sPvrQjFWWr3f/bCCdcyXILoCJfJ2V0Vk4ZqKEKWJPR+mhrdKmr4UkrtZL3RT8GGD/OC2VxCZXhbdM6mbrSR6e078dFRYKBS0PIfBLco1M/b5gqmCV0IAx8ziVM9Z6JGxxp4IlohZzgKtVbOHSU80uAHO73wEZZjpQUlZEWl+JjQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Wmt6AgYM; 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="Wmt6AgYM" Received: by smtp.kernel.org (Postfix) with ESMTPSA id B8C701F000FF; Sat, 12 Sep 2026 12:48:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789217302; bh=V/PjZOz58DX8qPJcdQLZESZl9V46UhYpbOpc5lkk/rA=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=Wmt6AgYMJkDBRIed+JGiS0pG8GJewJ/frIY9C0zk4nc+Snzv2CgHUDcxiO/ok2/if 0B4T0DbRF3Kn9Jv5hSCL2uVbUu24V9Qyrd6TYuY7qw7HYXKWY1KfbplsLX8lcjCfq8 qhJsgSPBw1c2uUdJwv2MRFM99SxxmaGygxlGrzhA= 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 6.12 0912/1376] drm/sun4i: vi scaler: Fix coefficient selection Date: Sat, 12 Sep 2026 08:55:38 +0200 Message-ID: <20260912065627.895288603@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260912065607.535295758@linuxfoundation.org> References: <20260912065607.535295758@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 6.12-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