From patchwork Wed Jan 8 11:27:44 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: AngeloGioacchino Del Regno X-Patchwork-Id: 13930605 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 1FEF9E7719C for ; Wed, 8 Jan 2025 11:29:23 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 9D00E10EBA1; Wed, 8 Jan 2025 11:29:22 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=collabora.com header.i=@collabora.com header.b="DQdt8K0w"; dkim-atps=neutral Received: from bali.collaboradmins.com (bali.collaboradmins.com [148.251.105.195]) by gabe.freedesktop.org (Postfix) with ESMTPS id 92FC310EBA1 for ; Wed, 8 Jan 2025 11:29:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1736335730; bh=kgnJqsg8z2erw2TEimJFPukXqh6KNus2GeViUySenE4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DQdt8K0wvlT2RYLXkJxP/FiJJ06jgW1FutrjkuoDvFQDTNtcj0f9YsWL4EWwH0Cc0 AVkmmwb/Ul2mIouxVSRdXbbZOPWCNtNRpO6vW1sFbKNmQn5JZKX9EdWiud23Kk6k7/ c+CSiPu3OYylwn3lqj5H+NlWoFHJLdjNisA5sfso/TEqWUkfZWTYUXTWE5y/SlDr8w GMq/h8/CABQokgYzy3pRc6qksjYR7BDp5fBWDfvIJGTLJ9f4vNFQU6KrjW9tvxYmLy gdM8yR6EIEImh5oh+0hhs0NlqtOuo91DtSKsfJ4kUjw7VyJ3uuXUMxgsI0+3MCeOFK ILVIYKrnss0mA== Received: from IcarusMOD.eternityproject.eu (2-237-20-237.ip236.fastwebnet.it [2.237.20.237]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: kholk11) by bali.collaboradmins.com (Postfix) with ESMTPSA id EF82E17E1581; Wed, 8 Jan 2025 12:28:48 +0100 (CET) From: AngeloGioacchino Del Regno To: chunkuang.hu@kernel.org Cc: p.zabel@pengutronix.de, airlied@gmail.com, simona@ffwll.ch, maarten.lankhorst@linux.intel.com, mripard@kernel.org, tzimmermann@suse.de, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, matthias.bgg@gmail.com, angelogioacchino.delregno@collabora.com, ck.hu@mediatek.com, jitao.shi@mediatek.com, jie.qiu@mediatek.com, junzhi.zhao@mediatek.com, dri-devel@lists.freedesktop.org, linux-mediatek@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel@collabora.com, dmitry.baryshkov@linaro.org, lewis.liao@mediatek.com, ives.chenjh@mediatek.com, tommyyl.chen@mediatek.com, jason-jh.lin@mediatek.com Subject: [PATCH v4 34/34] drm/mediatek: mtk_hdmi_v2: Add debugfs ops and implement ABIST Date: Wed, 8 Jan 2025 12:27:44 +0100 Message-ID: <20250108112744.64686-35-angelogioacchino.delregno@collabora.com> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20250108112744.64686-1-angelogioacchino.delregno@collabora.com> References: <20250108112744.64686-1-angelogioacchino.delregno@collabora.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Implement the Automated Built-In Self-Test ABIST functionality provided by the HDMIv2 IP and expose it through the "hdmi_abist" debugfs file. Write "1" to this file to activate ABIST, or "0" to deactivate. Signed-off-by: AngeloGioacchino Del Regno --- drivers/gpu/drm/mediatek/mtk_hdmi_v2.c | 123 +++++++++++++++++++++++++ 1 file changed, 123 insertions(+) diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi_v2.c b/drivers/gpu/drm/mediatek/mtk_hdmi_v2.c index 8841fa4e476a..1ce42cb0616d 100644 --- a/drivers/gpu/drm/mediatek/mtk_hdmi_v2.c +++ b/drivers/gpu/drm/mediatek/mtk_hdmi_v2.c @@ -1179,6 +1179,128 @@ static int mtk_hdmi_v2_bridge_atomic_check(struct drm_bridge *bridge, conn_state->state); } +static int mtk_hdmi_v2_set_abist(struct mtk_hdmi *hdmi, bool enable) +{ + struct drm_display_mode *mode = &hdmi->mode; + int abist_format = -EINVAL; + bool interlaced; + + if (!enable) { + regmap_clear_bits(hdmi->regs, TOP_CFG00, HDMI_ABIST_ENABLE); + return 0; + } + + if (!mode->hdisplay || !mode->vdisplay) + return -EINVAL; + + interlaced = mode->flags & DRM_MODE_FLAG_INTERLACE; + + switch (mode->hdisplay) { + case 720: + if (mode->vdisplay == 480) + abist_format = 2; + else if (mode->vdisplay == 576) + abist_format = 11; + break; + case 1280: + if (mode->vdisplay == 720) + abist_format = 3; + break; + case 1440: + if (mode->vdisplay == 480) + abist_format = interlaced ? 5 : 9; + else if (mode->vdisplay == 576) + abist_format = interlaced ? 14 : 18; + break; + case 1920: + if (mode->vdisplay == 1080) + abist_format = interlaced ? 4 : 10; + break; + case 3840: + if (mode->vdisplay == 2160) + abist_format = 25; + break; + case 4096: + if (mode->vdisplay == 2160) + abist_format = 26; + break; + default: + break; + } + if (!abist_format) + return -EINVAL; + + regmap_update_bits(hdmi->regs, TOP_CFG00, HDMI_ABIST_VIDEO_FORMAT, + FIELD_PREP(HDMI_ABIST_VIDEO_FORMAT, abist_format)); + regmap_set_bits(hdmi->regs, TOP_CFG00, HDMI_ABIST_ENABLE); + return 0; +} + +static int mtk_hdmi_v2_debug_abist_show(struct seq_file *m, void *arg) +{ + struct mtk_hdmi *hdmi = m->private; + bool en; + u32 val; + int ret; + + if (!hdmi) + return -EINVAL; + + ret = regmap_read(hdmi->regs, TOP_CFG00, &val); + if (ret) + return ret; + + en = FIELD_GET(HDMI_ABIST_ENABLE, val); + + seq_printf(m, "HDMI Automated Built-In Self Test: %s\n", + en ? "Enabled" : "Disabled"); + + return 0; +} + +static ssize_t mtk_hdmi_v2_debug_abist_write(struct file *file, + const char __user *ubuf, + size_t len, loff_t *offp) +{ + struct seq_file *m = file->private_data; + int ret; + u32 en; + + if (!m || !m->private || *offp) + return -EINVAL; + + ret = kstrtouint_from_user(ubuf, len, 0, &en); + if (ret) + return ret; + + if (en < 0 || en > 1) + return -EINVAL; + + mtk_hdmi_v2_set_abist((struct mtk_hdmi *)m->private, en); + return len; +} + +static int mtk_hdmi_v2_debug_abist_open(struct inode *inode, struct file *file) +{ + return single_open(file, mtk_hdmi_v2_debug_abist_show, inode->i_private); +} + +static const struct file_operations mtk_hdmi_debug_abist_fops = { + .owner = THIS_MODULE, + .open = mtk_hdmi_v2_debug_abist_open, + .read = seq_read, + .write = mtk_hdmi_v2_debug_abist_write, + .llseek = seq_lseek, + .release = single_release, +}; + +static void mtk_hdmi_v2_debugfs_init(struct drm_bridge *bridge, struct dentry *root) +{ + struct mtk_hdmi *dpi = hdmi_ctx_from_bridge(bridge); + + debugfs_create_file("hdmi_abist", 0640, root, dpi, &mtk_hdmi_debug_abist_fops); +} + static const struct drm_bridge_funcs mtk_v2_hdmi_bridge_funcs = { .attach = mtk_hdmi_v2_bridge_attach, .detach = mtk_hdmi_v2_bridge_detach, @@ -1199,6 +1321,7 @@ static const struct drm_bridge_funcs mtk_v2_hdmi_bridge_funcs = { .hdmi_tmds_char_rate_valid = mtk_hdmi_v2_hdmi_tmds_char_rate_valid, .hdmi_clear_infoframe = mtk_hdmi_v2_hdmi_clear_infoframe, .hdmi_write_infoframe = mtk_hdmi_v2_hdmi_write_infoframe, + .debugfs_init = mtk_hdmi_v2_debugfs_init, }; /*