From patchwork Tue May 2 03:27:29 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Deborah Brouwer X-Patchwork-Id: 679025 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 62FCBC77B7C for ; Tue, 2 May 2023 03:28:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233450AbjEBD2T (ORCPT ); Mon, 1 May 2023 23:28:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59974 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233475AbjEBD2M (ORCPT ); Mon, 1 May 2023 23:28:12 -0400 Received: from madras.collabora.co.uk (madras.collabora.co.uk [46.235.227.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5D93A4206 for ; Mon, 1 May 2023 20:28:09 -0700 (PDT) Received: from localhost.localdomain (node-1w7jr9st5p2etziuntaazujnj.ipv6.telus.net [IPv6:2001:569:beb1:1500:c96f:992f:7c34:9ff]) (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: dbrouwer) by madras.collabora.co.uk (Postfix) with ESMTPSA id EF12E66032AB; Tue, 2 May 2023 04:28:06 +0100 (BST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1682998088; bh=P4HIra8pMSwSHezU+vBIcQ0D+Uzg6FuwFfWNjN+nMFs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=KIUZboaktSxQS5qlxm2Q7SQKuCz//FcwVKmQco9b11wGWvuTJKOwcYeaTyHSGmBLr 1HKM8k2/C0bd/I5HNYv2LzoK+xF4imWEjmUJU7w/To0/06G3/gXV1EMkUUY5Xw37vQ qKnJSsN3LNPhgJYXzNFFXQbbS5fecK1Tim2AHqMC8FUoQNVwqHI9iewe2HJagSCQ53 NplBoSAms3PKngErm+43PdPBv8th47TVTHpst1oEPCj3P02rsMaAsUDjSXpmhx++G2 qcXlx08/fHafNta5hWl2BwqBeet2P5tZeD4EIiPNrunLpFsvf0M76WOz+KgNqQazBj TCucyMV583elA== From: Deborah Brouwer To: linux-media@vger.kernel.org Cc: hverkuil@xs4all.nl, Deborah Brouwer Subject: [PATCH v2 11/13] media: bttv: refactor bttv_set_dma() Date: Mon, 1 May 2023 20:27:29 -0700 Message-Id: <6ea6ccdf7fe9d97b7793a8c40a6a9abc1b185b81.1682995256.git.deborah.brouwer@collabora.com> X-Mailer: git-send-email 2.39.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Break bttv_set_dma() into several smaller, separate functions so it is easier to read the risc and dma code. Replace numeric values with descriptive macros. Also remove the unused field btv->cap_ctl. Signed-off-by: Deborah Brouwer --- drivers/media/pci/bt8xx/bttv-risc.c | 111 ++++++++++++++++++---------- drivers/media/pci/bt8xx/bttvp.h | 1 - 2 files changed, 71 insertions(+), 41 deletions(-) diff --git a/drivers/media/pci/bt8xx/bttv-risc.c b/drivers/media/pci/bt8xx/bttv-risc.c index 97248e340a28..3e0dac56de54 100644 --- a/drivers/media/pci/bt8xx/bttv-risc.c +++ b/drivers/media/pci/bt8xx/bttv-risc.c @@ -360,21 +360,80 @@ bttv_apply_geo(struct bttv *btv, struct bttv_geometry *geo, int odd) /* ---------------------------------------------------------- */ /* risc group / risc main loop / dma management */ -void -bttv_set_dma(struct bttv *btv, int override) +static void bttv_set_risc_status(struct bttv *btv) { - unsigned long cmd; - int capctl; + unsigned long cmd = BT848_RISC_JUMP; + /* + * The value of btv->loop_irq sets or resets the RISC_STATUS for video + * and/or vbi by setting the value of bits [23:16] in the first dword + * of the JUMP instruction: + * video risc: set (1) and reset (~1) + * vbi risc: set(4) and reset (~4) + */ + if (btv->loop_irq) { + cmd |= BT848_RISC_IRQ; + cmd |= (btv->loop_irq & 0x0f) << 16; + cmd |= (~btv->loop_irq & 0x0f) << 20; + } + btv->main.cpu[RISC_SLOT_LOOP] = cpu_to_le32(cmd); +} + +static void bttv_set_irq_timer(struct bttv *btv) +{ + if (btv->curr.frame_irq || btv->loop_irq || btv->cvbi) + mod_timer(&btv->timeout, jiffies + BTTV_TIMEOUT); + else + del_timer(&btv->timeout); +} + +static int bttv_set_capture_control(struct bttv *btv, int start_capture) +{ + int capctl = 0; + + if (btv->curr.top || btv->curr.bottom) + capctl = BT848_CAP_CTL_CAPTURE_ODD | + BT848_CAP_CTL_CAPTURE_EVEN; + + if (btv->cvbi) + capctl |= BT848_CAP_CTL_CAPTURE_VBI_ODD | + BT848_CAP_CTL_CAPTURE_VBI_EVEN; + + capctl |= start_capture; + + btaor(capctl, ~0x0f, BT848_CAP_CTL); + + return capctl; +} + +static void bttv_start_dma(struct bttv *btv) +{ + if (btv->dma_on) + return; + btwrite(btv->main.dma, BT848_RISC_STRT_ADD); + btor(0x3, BT848_GPIO_DMA_CTL); + btv->dma_on = 1; +} + +static void bttv_stop_dma(struct bttv *btv) +{ + if (!btv->dma_on) + return; + btand(~0x3, BT848_GPIO_DMA_CTL); + btv->dma_on = 0; +} + +void bttv_set_dma(struct bttv *btv, int start_capture) +{ + int capctl = 0; - btv->cap_ctl = 0; - if (NULL != btv->curr.top) btv->cap_ctl |= 0x02; - if (NULL != btv->curr.bottom) btv->cap_ctl |= 0x01; - if (NULL != btv->cvbi) btv->cap_ctl |= 0x0c; + bttv_set_risc_status(btv); + bttv_set_irq_timer(btv); + capctl = bttv_set_capture_control(btv, start_capture); - capctl = 0; - capctl |= (btv->cap_ctl & 0x03) ? 0x03 : 0x00; /* capture */ - capctl |= (btv->cap_ctl & 0x0c) ? 0x0c : 0x00; /* vbi data */ - capctl |= override; + if (capctl) + bttv_start_dma(btv); + else + bttv_stop_dma(btv); d2printk("%d: capctl=%x lirq=%d top=%08llx/%08llx even=%08llx/%08llx\n", btv->c.nr,capctl,btv->loop_irq, @@ -382,34 +441,6 @@ bttv_set_dma(struct bttv *btv, int override) btv->curr.top ? (unsigned long long)btv->curr.top->top.dma : 0, btv->cvbi ? (unsigned long long)btv->cvbi->bottom.dma : 0, btv->curr.bottom ? (unsigned long long)btv->curr.bottom->bottom.dma : 0); - - cmd = BT848_RISC_JUMP; - if (btv->loop_irq) { - cmd |= BT848_RISC_IRQ; - cmd |= (btv->loop_irq & 0x0f) << 16; - cmd |= (~btv->loop_irq & 0x0f) << 20; - } - if (btv->curr.frame_irq || btv->loop_irq || btv->cvbi) { - mod_timer(&btv->timeout, jiffies+BTTV_TIMEOUT); - } else { - del_timer(&btv->timeout); - } - btv->main.cpu[RISC_SLOT_LOOP] = cpu_to_le32(cmd); - - btaor(capctl, ~0x0f, BT848_CAP_CTL); - if (capctl) { - if (btv->dma_on) - return; - btwrite(btv->main.dma, BT848_RISC_STRT_ADD); - btor(3, BT848_GPIO_DMA_CTL); - btv->dma_on = 1; - } else { - if (!btv->dma_on) - return; - btand(~3, BT848_GPIO_DMA_CTL); - btv->dma_on = 0; - } - return; } int diff --git a/drivers/media/pci/bt8xx/bttvp.h b/drivers/media/pci/bt8xx/bttvp.h index bce2401de9bd..b750dfbc75cc 100644 --- a/drivers/media/pci/bt8xx/bttvp.h +++ b/drivers/media/pci/bt8xx/bttvp.h @@ -430,7 +430,6 @@ struct bttv { int loop_irq; int new_input; - unsigned long cap_ctl; unsigned long dma_on; struct timer_list timeout; struct bttv_suspend_state state;