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Lin" , Sean Paul , Jason Chen , Fei Shao , , , , , Hsiao Chien Sung Subject: [PATCH v9 10/21] drm/mediatek: Fix XRGB setting error in Mixer Date: Fri, 14 Jun 2024 10:46:09 +0800 Message-ID: <20240614024620.19011-11-shawn.sung@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20240614024620.19011-1-shawn.sung@mediatek.com> References: <20240614024620.19011-1-shawn.sung@mediatek.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MTK: N Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Hsiao Chien Sung Although the alpha channel in XRGB formats can be ignored, ALPHA_CON must be configured accordingly when using XRGB formats or it will still affects CRC generation. Fixes: d886c0009bd0 ("drm/mediatek: Add ETHDR support for MT8195") Signed-off-by: Hsiao Chien Sung Reviewed-by: CK Hu --- drivers/gpu/drm/mediatek/mtk_ethdr.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/mediatek/mtk_ethdr.c b/drivers/gpu/drm/mediate= k/mtk_ethdr.c index 9796fd1d51f2..902dec03a7dd 100644 --- a/drivers/gpu/drm/mediatek/mtk_ethdr.c +++ b/drivers/gpu/drm/mediatek/mtk_ethdr.c @@ -153,6 +153,7 @@ void mtk_ethdr_layer_config(struct device *dev, unsigne= d int idx, unsigned int offset =3D (pending->x & 1) << 31 | pending->y << 16 | pendi= ng->x; unsigned int align_width =3D ALIGN_DOWN(pending->width, 2); unsigned int alpha_con =3D 0; + bool replace_src_a =3D false; =20 dev_dbg(dev, "%s+ idx:%d", __func__, idx); =20 @@ -172,8 +173,15 @@ void mtk_ethdr_layer_config(struct device *dev, unsign= ed int idx, if (state->base.fb && state->base.fb->format->has_alpha) alpha_con =3D MIXER_ALPHA_AEN | MIXER_ALPHA; =20 - mtk_mmsys_mixer_in_config(priv->mmsys_dev, idx + 1, alpha_con ? false : t= rue, - MIXER_ALPHA, + if (state->base.fb && !state->base.fb->format->has_alpha) { + /* + * Mixer doesn't support CONST_BLD mode, + * use a trick to make the output equivalent + */ + replace_src_a =3D true; + } + + mtk_mmsys_mixer_in_config(priv->mmsys_dev, idx + 1, replace_src_a, MIXER_= ALPHA, pending->x & 1 ? MIXER_INX_MODE_EVEN_EXTEND : MIXER_INX_MODE_BYPASS, align_width / 2 - 1, cmdq_pkt); =20 --=20 2.18.0