From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f171.google.com (mail-pl1-f171.google.com [209.85.214.171]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C7DD12848AA for ; Sat, 21 Mar 2026 09:51:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.171 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774086672; cv=none; b=HU+Acov0jPCPvO+7+BI8toTW5lPGSsGdYvW7U2ztezNNuNT7vAJ0R2HgrHKr+FusD8H80jIESnCqDFt4p5xSV30qs8HXqTph0TgbaNFwqzIvnpI89bh4kIDtBsZ0hd/TNWJ/sfbjQGqC8ML5Y8xCPVxAQt9/QahI5Umr1qvj9oo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774086672; c=relaxed/simple; bh=oYGllORQe1KtTW7SJUoYEU6wdznpdgBDarm6BDzeQYs=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=j3MfTdK0oS8143e0hcDIKfi7Tn34g8tEDhwUicFfrDZwloSNryadgls20cmEOnvOOG550FKVWsXwKfZjarZhD/VXzPxzYlR9sdDgUGyLe1dDrH8FSN8GzHvcStlZl9OOYsAUPsaAGT8tAgynZjjWeRQDRgPrjFl0c+wbR043R/0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=hVm6gEZx; arc=none smtp.client-ip=209.85.214.171 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="hVm6gEZx" Received: by mail-pl1-f171.google.com with SMTP id d9443c01a7336-2ab39b111b9so6171335ad.1 for ; Sat, 21 Mar 2026 02:51:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1774086670; x=1774691470; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=bGQi8LEv7kZuoyjue24gJuvJD8zF1I0JZAlNaZK/Ick=; b=hVm6gEZx1fI8m0t2TMocpsirmw76ToBGwNd0D8B+sIRgo3O0IJm5XdpATTX3H5fOj2 hORzgjTH35pT3BQYsMSHSkCWOVt6ZMk+OyuAv5W6bMWcDozHrUKsMBanwa5F+XebkDMc scQqf2SJ6oZ92XOwgL93F8fb73i5AJ+AsFpfu4S4VxVh8sXhafNIz+yDojUPLMfE/ZFR Uvo5rqBtxWuK/hUIiFTTe7fan+nuZS0gvzUGnpV0GOKCOyxvaK6gQmqtGufT/QjC9ZYL QCVna+5Z7gqegkEkKn8pEoaXRalVGEVC+x4KU/iLACmei3kcQwj+cvkHiNxdGD0mBGN0 bU7Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1774086670; x=1774691470; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=bGQi8LEv7kZuoyjue24gJuvJD8zF1I0JZAlNaZK/Ick=; b=jWvzvhxmI0bdjqYpGp2zw8zl1VzpQKbhOygDBtn4CAq1PwxEncQ7pqd5aR/JgflPiY 5MpiFnlJ1SKkjE+zYzm62DdG4nop9oIyPUDaMX/jvwAx62jUrH/CfIfms3/42cEDBxh3 hNRn0eY3AGpkPvukKW9AIoDk0ZTNE3+lrmh2tsWCNioSUZZgJZUGj6SipzgSbbyeV6p8 vOVQ+c/rLMWauf/zakm0a/lJLQFbDB/0topo/auTjZ9vpzAlMvLBviaWR888x0jGyEzb lnuJIjKU1vSLN+Ro7hKMZwfDm3iMWQ8hGkH5RVKpxorJehc+ozXl3uYfC1Q/RIhetLs8 /pkg== X-Forwarded-Encrypted: i=1; AJvYcCW4BuZrCoQZlh76r6XrUM4WfomejCZiDtA3b9PcYNR/rME5dvKeeJiYfh5nPbaLhohSx/ImkgbSZyR/nt81@vger.kernel.org X-Gm-Message-State: AOJu0Yz8Wl8l8acou0eAsnM91CwyqgqnqPEd/R5i1Vf/Y4cDh6zlfwIw 5QWZro+rRTgD0lSFYn09qM+p1f5sMn/hYUTSmT0NSoci3z8DYlhDlqYv X-Gm-Gg: ATEYQzynkTcoXc8WWGCFGOk673Brw5rGw3JfUNe1FqOzzUPL3i9wr5Z8AxIkYJ03Dae Y/0HjySO94OdqAT0vITWmSXm+Hpo2Xloi2N0WClQIYu+tZU+UVyHOYiLtPnBvmjVgY/76wrW1IN WxKtdLWhJYfxfGrBQeOKVmNVCdj/6pUSLV3PVXPt2gYigow1tlucmuE0IfZlf0BZUDr4Pj3UOkt uNWPC8ZX1fGpaVpyMjo5S0YK8PMTU6KpWTEB5NxR8YeLDH84lhoAjZXVsZjDyprMVdU4slpw5qT I4fZkgiqujNcy2FAHJstKpFEoereQUwV/yRDHjjCxvLY05yfVwO5j+F2tO22s70xD+zd1KYByHr CTSt9LD5wCtUM/OsEr/FQeraMio3+lcxAjFBRSaDSk3w/ffYVa++2fdm6jG0zcGyCZwz2CJJZ53 iij24+omLEMzaa7rJE/qWVfyNV X-Received: by 2002:a17:902:cece:b0:2b0:69bf:a3df with SMTP id d9443c01a7336-2b0827a4fd6mr56886375ad.27.1774086670002; Sat, 21 Mar 2026 02:51:10 -0700 (PDT) Received: from nuvole ([5.180.78.78]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2b083549f63sm46739095ad.30.2026.03.21.02.51.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 21 Mar 2026 02:51:09 -0700 (PDT) From: Pengyu Luo To: Bjorn Andersson , Michael Turquette , Stephen Boyd Cc: Pengyu Luo , linux-arm-msm@vger.kernel.org, linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] clk: qcom: rcg2: expand frac table for mdss_pixel_clk_src Date: Sat, 21 Mar 2026 17:50:28 +0800 Message-ID: <20260321095029.2259489-1-mitltlatltl@gmail.com> X-Mailer: git-send-email 2.53.0 Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Recently, when testing 10-bit dsi C-PHY panel, clks are different from the usual. (dsi0_phy_pll_out_dsiclk's parent is dsi0_pll_bit_clk now (dsiclk_sel = 0)) And we failed to set dsiclk's children. dsi_link_clk_set_rate_6g: Set clk rates: pclk=172992000, byteclk=108120000 byteclk was set first to 108120000, so the vco rate was set to 108120000 * 7 * 1 * 1 = 756840000. When we was trying to set 172992000 on mdss_pixel_clk_src later. Since there was no matched ratio, we failed to set it. And dsiclk divider ratio was set to 15:1 (wrong cached register value 0xf and didn't update), we finally got 50455997, apparently wrong. dsi0vco_clk 1 1 0 756839941 dsi0_pll_out_div_clk 1 1 0 756839941 dsi0_pll_post_out_div_clk 0 0 0 216239983 dsi0_pll_bit_clk 2 2 0 756839941 dsi0_phy_pll_out_dsiclk 2 2 0 50455997 disp_cc_mdss_pclk1_clk_src 1 1 0 50455997 dsi0_pll_by_2_bit_clk 0 0 0 378419970 dsi0_phy_pll_out_byteclk 2 2 0 108119991 disp_cc_mdss_byte1_clk_src 2 2 0 108119991 Downstream clk_summary shows the mdss_pixel_clk_src support the ratio(35:16) dsi0_phy_pll_out_dsiclk 2 2 0 378420000 disp_cc_mdss_pclk1_clk_src 1 1 0 172992000 dsi0_phy_pll_out_byteclk 2 2 0 108120000 disp_cc_mdss_byte1_clk_src 2 2 0 108120000 After checking downstream source, 15:4 also seems to be supported, add them two. Signed-off-by: Pengyu Luo --- drivers/clk/qcom/clk-rcg2.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/clk/qcom/clk-rcg2.c b/drivers/clk/qcom/clk-rcg2.c index fc696b66cc..6064a0e17d 100644 --- a/drivers/clk/qcom/clk-rcg2.c +++ b/drivers/clk/qcom/clk-rcg2.c @@ -1117,6 +1117,8 @@ static const struct frac_entry frac_table_pixel[] = { { 4, 9 }, { 1, 1 }, { 2, 3 }, + { 16, 35}, + { 4, 15}, { } }; -- 2.53.0