From patchwork Mon Nov 11 03:37:02 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chuan Liu via B4 Relay X-Patchwork-Id: 13870211 X-Patchwork-Delegate: neil.armstrong@linaro.org 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 4A0C9D12D68 for ; Mon, 11 Nov 2024 03:40:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:Reply-To:List-Subscribe:List-Help: List-Post:List-Archive:List-Unsubscribe:List-Id:Cc:To:In-Reply-To:References: Message-Id:MIME-Version:Subject:Date:From:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=Db6PuDRRzen1ZHRr/7pMKfThlwGvrwr5qXjFktnfGN4=; b=KkzNrYJfB5w67M cZeS64GbD4oqJ5mJQBlbuKYIUgFbcXiXS7aH5OuqAHoKMFwwRxaeQhu/jv9+f95T16o13CSJXzr+y PcbrWxT5CyBVeCmr3SmyX474iaT4CVIlJ/i/cDprxpxqnTVYerQU0ugpYXI0Ztge3zKvFpaqugyDa NZAZD0bXuL6feLe9WHZvOP2ox5DLqDsqMmuuwcKMvZn27gS4v2dEEOEzBV/hCBQxOk4QD07jsxjse XOGpwfiKi0SGJ/6XmN67yiyLv+65jra8XhrLCnCm7ZlBKAtwVsBpPy1KTee1jM9XVdPY3uvdn+Zts v9STg7dc769Nn76VT4Iw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1tALIH-0000000GF0l-1wT6; Mon, 11 Nov 2024 03:40:49 +0000 Received: from nyc.source.kernel.org ([147.75.193.91]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1tALEl-0000000GEYO-3LFP; Mon, 11 Nov 2024 03:37:14 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by nyc.source.kernel.org (Postfix) with ESMTP id DBF08A40DC8; Mon, 11 Nov 2024 03:35:15 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPS id D8BD7C4CED6; Mon, 11 Nov 2024 03:37:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1731296229; bh=O0/vpbhe7rf42WvVAzr8V4TxhY556ffdiUaI+owMnFY=; h=From:Date:Subject:References:In-Reply-To:To:Cc:Reply-To:From; b=HeB7BBCbv20JwbG6421LaFzYPya9Vj1XqFoGnOveXxPdy53o5rjZfr5ibWojEgOpt esZbTprJd2nYYp0oI9E15kq062ivRhl27CFBj466hAG/83ZspGlpwagXocQ7uUCebG uj7kcOgre5gXhK/Zi+BLsGvU2WJXwC2ErBzVlB7Ym8WMclBtwY3kNt6u5lSUl8avt0 tdDkZZgOF8EFyB3KDRwKwfUb/NcJdDL0mb1Sbq4q/jLnSI7GGqp4uiVZ+w8pADliGr nQNA0AVf4QWTUsbRvSe096rLl9q6m7dKyF9LqCoYyX46yx1lYx1UuNsLCDE9ipZKCU FtK9SR+dBdRvg== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id CB31FD12D68; Mon, 11 Nov 2024 03:37:09 +0000 (UTC) From: Chuan Liu via B4 Relay Date: Mon, 11 Nov 2024 11:37:02 +0800 Subject: [PATCH v2 2/3] clk: meson: Fix failure of glitch-free mux switching MIME-Version: 1.0 Message-Id: <20241111-fix_glitch_free-v2-2-0099fd9ad3e5@amlogic.com> References: <20241111-fix_glitch_free-v2-0-0099fd9ad3e5@amlogic.com> In-Reply-To: <20241111-fix_glitch_free-v2-0-0099fd9ad3e5@amlogic.com> To: Michael Turquette , Stephen Boyd , Neil Armstrong , Jerome Brunet , Kevin Hilman , Martin Blumenstingl Cc: linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, linux-amlogic@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Chuan Liu X-Mailer: b4 0.14.1 X-Developer-Signature: v=1; a=ed25519-sha256; t=1731296227; l=8711; i=chuan.liu@amlogic.com; s=20240902; h=from:subject:message-id; bh=atOOThnlnG3IFHNRk0s4v4QFpYbDw+X8nwyi0iZYZHw=; b=SJ1Q58UzUoM28/g8A6L/ubJfjIKtacTu0tk72GbNpWLNgK6hW40Oq2r5sb6/GSwCPAYn9n5IR 1xi5qyyqFFzDkH/huhC6vUketMMfDWvwWb7c2HVS5jgIb+1DFuMSl97 X-Developer-Key: i=chuan.liu@amlogic.com; a=ed25519; pk=fnKDB+81SoWGKW2GJNFkKy/ULvsDmJZRGBE7pR5Xcpo= X-Endpoint-Received: by B4 Relay for chuan.liu@amlogic.com/20240902 with auth_id=203 X-Original-From: Chuan Liu X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241110_193712_019907_F82AE5D5 X-CRM114-Status: GOOD ( 15.62 ) X-BeenThere: linux-amlogic@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: chuan.liu@amlogic.com Sender: "linux-amlogic" Errors-To: linux-amlogic-bounces+linux-amlogic=archiver.kernel.org@lists.infradead.org From: Chuan Liu glitch-free mux has two clock channels (channel 0 and channel 1) with the same configuration.Channel 0 of glitch-free mux is not only the clock source for the mux, but also the working clock for glitch free mux. Therefore, when glitch-free mux switches, it is necessary to ensure that channel 0 has a clock input, otherwise glitch free mux will not work and cannot switch to the target channel. So adding flag CLK_OPS_PARENT_ENABLE ensures that both channels 0 and 1 are enabled when mux switches. In fact, we just need to make sure that channel 0 is enabled. The purpose of CLK_OPS_PARENT_ENABLE may not be to solve our situation, but adding this flag does solve our current problem. Fixes: 84af914404db ("clk: meson: a1: add Amlogic A1 Peripherals clock controller driver") Fixes: 14ebb3154b8f ("clk: meson: axg: add Video Clocks") Fixes: f06ac3ed04e8 ("clk: meson: c3: add c3 clock peripherals controller driver") Fixes: 085a4ea93d54 ("clk: meson: g12a: add peripheral clock controller") Fixes: fac9a55b66c9 ("clk: meson-gxbb: Add MALI clocks") Fixes: 74e1f2521f16 ("clk: meson: meson8b: add the GPU clock tree") Fixes: 57b55c76aaf1 ("clk: meson: S4: add support for Amlogic S4 SoC peripheral clock controller") Signed-off-by: Chuan Liu --- drivers/clk/meson/a1-peripherals.c | 4 ++-- drivers/clk/meson/axg.c | 4 ++-- drivers/clk/meson/c3-peripherals.c | 2 +- drivers/clk/meson/g12a.c | 6 +++--- drivers/clk/meson/gxbb.c | 6 +++--- drivers/clk/meson/meson8b.c | 21 ++++++++++++++++++--- drivers/clk/meson/s4-peripherals.c | 12 ++++++------ 7 files changed, 35 insertions(+), 20 deletions(-) diff --git a/drivers/clk/meson/a1-peripherals.c b/drivers/clk/meson/a1-peripherals.c index 7aa6abb2eb1f..4b9686916b17 100644 --- a/drivers/clk/meson/a1-peripherals.c +++ b/drivers/clk/meson/a1-peripherals.c @@ -489,7 +489,7 @@ static struct clk_regmap dspa_sel = { &dspa_b.hw, }, .num_parents = 2, - .flags = CLK_SET_RATE_PARENT, + .flags = CLK_SET_RATE_PARENT | CLK_OPS_PARENT_ENABLE, }, }; @@ -635,7 +635,7 @@ static struct clk_regmap dspb_sel = { &dspb_b.hw, }, .num_parents = 2, - .flags = CLK_SET_RATE_PARENT, + .flags = CLK_SET_RATE_PARENT | CLK_OPS_PARENT_ENABLE, }, }; diff --git a/drivers/clk/meson/axg.c b/drivers/clk/meson/axg.c index 1b08daf579b2..a1217dff40fa 100644 --- a/drivers/clk/meson/axg.c +++ b/drivers/clk/meson/axg.c @@ -1144,7 +1144,7 @@ static struct clk_regmap axg_vpu = { &axg_vpu_1.hw }, .num_parents = 2, - .flags = CLK_SET_RATE_NO_REPARENT, + .flags = CLK_SET_RATE_NO_REPARENT | CLK_OPS_PARENT_ENABLE, }, }; @@ -1260,7 +1260,7 @@ static struct clk_regmap axg_vapb_sel = { &axg_vapb_1.hw }, .num_parents = 2, - .flags = CLK_SET_RATE_NO_REPARENT, + .flags = CLK_SET_RATE_NO_REPARENT | CLK_OPS_PARENT_ENABLE, }, }; diff --git a/drivers/clk/meson/c3-peripherals.c b/drivers/clk/meson/c3-peripherals.c index 7dcbf4ebee07..4566c2aeeb19 100644 --- a/drivers/clk/meson/c3-peripherals.c +++ b/drivers/clk/meson/c3-peripherals.c @@ -1431,7 +1431,7 @@ static struct clk_regmap hcodec = { .ops = &clk_regmap_mux_ops, .parent_data = hcodec_parent_data, .num_parents = ARRAY_SIZE(hcodec_parent_data), - .flags = CLK_SET_RATE_PARENT, + .flags = CLK_SET_RATE_PARENT | CLK_OPS_PARENT_ENABLE, }, }; diff --git a/drivers/clk/meson/g12a.c b/drivers/clk/meson/g12a.c index d3539fe9f7af..4d3b064d09fc 100644 --- a/drivers/clk/meson/g12a.c +++ b/drivers/clk/meson/g12a.c @@ -2812,7 +2812,7 @@ static struct clk_regmap g12a_vpu = { &g12a_vpu_1.hw, }, .num_parents = 2, - .flags = CLK_SET_RATE_NO_REPARENT, + .flags = CLK_SET_RATE_NO_REPARENT | CLK_OPS_PARENT_ENABLE, }, }; @@ -3105,7 +3105,7 @@ static struct clk_regmap g12a_vapb_sel = { &g12a_vapb_1.hw, }, .num_parents = 2, - .flags = CLK_SET_RATE_NO_REPARENT, + .flags = CLK_SET_RATE_NO_REPARENT | CLK_OPS_PARENT_ENABLE, }, }; @@ -4039,7 +4039,7 @@ static struct clk_regmap g12a_mali = { .ops = &clk_regmap_mux_ops, .parent_hws = g12a_mali_parent_hws, .num_parents = 2, - .flags = CLK_SET_RATE_PARENT, + .flags = CLK_SET_RATE_PARENT | CLK_OPS_PARENT_ENABLE, }, }; diff --git a/drivers/clk/meson/gxbb.c b/drivers/clk/meson/gxbb.c index 262c318edbd5..dfa9ffc61b41 100644 --- a/drivers/clk/meson/gxbb.c +++ b/drivers/clk/meson/gxbb.c @@ -1132,7 +1132,7 @@ static struct clk_regmap gxbb_mali = { .ops = &clk_regmap_mux_ops, .parent_hws = gxbb_mali_parent_hws, .num_parents = 2, - .flags = CLK_SET_RATE_PARENT, + .flags = CLK_SET_RATE_PARENT | CLK_OPS_PARENT_ENABLE, }, }; @@ -1613,7 +1613,7 @@ static struct clk_regmap gxbb_vpu = { &gxbb_vpu_1.hw }, .num_parents = 2, - .flags = CLK_SET_RATE_NO_REPARENT, + .flags = CLK_SET_RATE_NO_REPARENT | CLK_OPS_PARENT_ENABLE, }, }; @@ -1748,7 +1748,7 @@ static struct clk_regmap gxbb_vapb_sel = { &gxbb_vapb_1.hw }, .num_parents = 2, - .flags = CLK_SET_RATE_NO_REPARENT, + .flags = CLK_SET_RATE_NO_REPARENT | CLK_OPS_PARENT_ENABLE, }, }; diff --git a/drivers/clk/meson/meson8b.c b/drivers/clk/meson/meson8b.c index e4b474c5f86c..0af76b527e5b 100644 --- a/drivers/clk/meson/meson8b.c +++ b/drivers/clk/meson/meson8b.c @@ -1997,7 +1997,22 @@ static struct clk_regmap meson8b_mali = { &meson8b_mali_1.hw, }, .num_parents = 2, - .flags = CLK_SET_RATE_PARENT, + /* + * glitch-free mux has two clock channels (channel 0 and + * channel 1) with the same configuration.Channel 0 of + * glitch-free mux is not only the clock source for the mux, + * but also the working clock for glitch free mux. Therefore, + * when glitch-free mux switches, it is necessary to ensure that + * channel 0 has a clock input, otherwise glitch free mux will + * not work and cannot switch to the target channel. So adding + * flag CLK_OPS_PARENT_ENABLE ensures that both channels 0 and 1 + * are enabled when mux switches. + * + * In fact, we just need to make sure that channel 0 is enabled. + * The purpose of CLK_OPS_PARENT_ENABLE may not be to solve our + * situation, but adding this flag does solve our current problem. + */ + .flags = CLK_SET_RATE_PARENT | CLK_OPS_PARENT_ENABLE, }, }; @@ -2252,7 +2267,7 @@ static struct clk_regmap meson8b_vpu = { &meson8b_vpu_1.hw, }, .num_parents = 2, - .flags = CLK_SET_RATE_PARENT, + .flags = CLK_SET_RATE_PARENT | CLK_OPS_PARENT_ENABLE, }, }; @@ -2364,7 +2379,7 @@ static struct clk_regmap meson8b_vdec_1 = { &meson8b_vdec_1_2.hw, }, .num_parents = 2, - .flags = CLK_SET_RATE_PARENT, + .flags = CLK_SET_RATE_PARENT | CLK_OPS_PARENT_ENABLE, }, }; diff --git a/drivers/clk/meson/s4-peripherals.c b/drivers/clk/meson/s4-peripherals.c index c930cf0614a0..79e0240d58e6 100644 --- a/drivers/clk/meson/s4-peripherals.c +++ b/drivers/clk/meson/s4-peripherals.c @@ -1404,7 +1404,7 @@ static struct clk_regmap s4_mali_mux = { .ops = &clk_regmap_mux_ops, .parent_hws = s4_mali_parent_hws, .num_parents = 2, - .flags = CLK_SET_RATE_PARENT, + .flags = CLK_SET_RATE_PARENT | CLK_OPS_PARENT_ENABLE, }, }; @@ -1536,7 +1536,7 @@ static struct clk_regmap s4_vdec_mux = { .ops = &clk_regmap_mux_ops, .parent_hws = s4_vdec_mux_parent_hws, .num_parents = ARRAY_SIZE(s4_vdec_mux_parent_hws), - .flags = CLK_SET_RATE_PARENT, + .flags = CLK_SET_RATE_PARENT | CLK_OPS_PARENT_ENABLE, }, }; @@ -1656,7 +1656,7 @@ static struct clk_regmap s4_hevcf_mux = { .ops = &clk_regmap_mux_ops, .parent_hws = s4_hevcf_mux_parent_hws, .num_parents = ARRAY_SIZE(s4_hevcf_mux_parent_hws), - .flags = CLK_SET_RATE_PARENT, + .flags = CLK_SET_RATE_PARENT | CLK_OPS_PARENT_ENABLE, }, }; @@ -1774,7 +1774,7 @@ static struct clk_regmap s4_vpu = { &s4_vpu_1.hw, }, .num_parents = 2, - .flags = CLK_SET_RATE_PARENT, + .flags = CLK_SET_RATE_PARENT | CLK_OPS_PARENT_ENABLE, }, }; @@ -1989,7 +1989,7 @@ static struct clk_regmap s4_vpu_clkc_mux = { .ops = &clk_regmap_mux_ops, .parent_hws = s4_vpu_mux_parent_hws, .num_parents = ARRAY_SIZE(s4_vpu_mux_parent_hws), - .flags = CLK_SET_RATE_PARENT, + .flags = CLK_SET_RATE_PARENT | CLK_OPS_PARENT_ENABLE, }, }; @@ -2115,7 +2115,7 @@ static struct clk_regmap s4_vapb = { &s4_vapb_1.hw }, .num_parents = 2, - .flags = CLK_SET_RATE_PARENT, + .flags = CLK_SET_RATE_PARENT | CLK_OPS_PARENT_ENABLE, }, };