From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 070A48F5D for ; Sun, 16 Jul 2023 20:37:32 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7E9D4C433C7; Sun, 16 Jul 2023 20:37:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1689539851; bh=l9DgQ0hPCZahCbdQH30JJnnXw/RsAO/efDuLlAaNFCg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=u3JZYnRwsiDjOV0VBpPnU76gsi267ycEBzSjy0EXc3CiG1biAOQEtE/r2eFCLC0Gs FSggl7PxA6bMb3f+XgOhJmc0q3LKPDBajACvxF83XXW6cj0g8wWC5/Kl/igYm4XvsE ejIU9NpGudpk9c5Py/HA+P4ki19kcftOsWsVypnE= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Francesco Dolcini , Robert Foss , Sasha Levin Subject: [PATCH 6.1 154/591] drm/bridge: tc358768: fix TXTAGOCNT computation Date: Sun, 16 Jul 2023 21:44:53 +0200 Message-ID: <20230716194927.849899985@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230716194923.861634455@linuxfoundation.org> References: <20230716194923.861634455@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Francesco Dolcini [ Upstream commit 3666aad8185af8d0ce164fd3c4974235417d6d0b ] Correct computation of TXTAGOCNT register. This register must be set to a value that ensure that the TTA-GO period = (4 x TLPX) with the actual value of TTA-GO being 4 x (TXTAGOCNT + 1) x (HSByteClk cycle) Fixes: ff1ca6397b1d ("drm/bridge: Add tc358768 driver") Signed-off-by: Francesco Dolcini Reviewed-by: Robert Foss Signed-off-by: Robert Foss Link: https://patchwork.freedesktop.org/patch/msgid/20230427142934.55435-8-francesco@dolcini.it Signed-off-by: Sasha Levin --- drivers/gpu/drm/bridge/tc358768.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/bridge/tc358768.c b/drivers/gpu/drm/bridge/tc358768.c index 014585b9582b9..ab408f3407ba4 100644 --- a/drivers/gpu/drm/bridge/tc358768.c +++ b/drivers/gpu/drm/bridge/tc358768.c @@ -797,7 +797,7 @@ static void tc358768_bridge_pre_enable(struct drm_bridge *bridge) /* TXTAGOCNT[26:16] RXTASURECNT[10:0] */ val = tc358768_to_ns((lptxcnt + 1) * dsibclk_nsk * 4); - val = tc358768_ns_to_cnt(val, dsibclk_nsk) - 1; + val = tc358768_ns_to_cnt(val, dsibclk_nsk) / 4 - 1; val2 = tc358768_ns_to_cnt(tc358768_to_ns((lptxcnt + 1) * dsibclk_nsk), dsibclk_nsk) - 2; val = val << 16 | val2; -- 2.39.2