From patchwork Thu Nov 6 10:18:55 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Russell King - ARM Linux X-Patchwork-Id: 5240771 Return-Path: X-Original-To: patchwork-dri-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 91B069F4D4 for ; Thu, 6 Nov 2014 10:20:06 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id BE64E2010C for ; Thu, 6 Nov 2014 10:20:02 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id C8DCB200E9 for ; Thu, 6 Nov 2014 10:19:58 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 029B46E153; Thu, 6 Nov 2014 02:19:58 -0800 (PST) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from pandora.arm.linux.org.uk (gw-1.arm.linux.org.uk [78.32.30.217]) by gabe.freedesktop.org (Postfix) with ESMTP id 4CB5A6E153 for ; Thu, 6 Nov 2014 02:19:54 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=arm.linux.org.uk; s=pandora-2014; h=Sender:In-Reply-To:Content-Type:MIME-Version:References:Message-ID:Subject:Cc:To:From:Date; bh=U2fP3DNZ8+X8Bt20bTsTsXJ3zbXa0Ffcy7P7E6OhiBg=; b=mxC1cDbVmBaozp6TPDiUySJc84CEcp+cpHW8vDWbh2qPxUcOMDO2+T62GUAHEZfx+u2MmF3LrzOa40OJYqmv6+nwXcaOKkAUdqmp0vn0LmAD+LbXFFmT2c5+DZKDFQhGLXpJ2wiM1O/FoHR2jXTZnAL2izs3S81U0AYQPcsIHO4=; Received: from n2100.arm.linux.org.uk ([fd8f:7570:feb6:1:214:fdff:fe10:4f86]:41198) by pandora.arm.linux.org.uk with esmtpsa (TLSv1:DHE-RSA-AES256-SHA:256) (Exim 4.82_1-5b7a7c0-XX) (envelope-from ) id 1XmK9b-0008Mv-Pe; Thu, 06 Nov 2014 10:19:01 +0000 Received: from linux by n2100.arm.linux.org.uk with local (Exim 4.76) (envelope-from ) id 1XmK9Y-0007wm-E6; Thu, 06 Nov 2014 10:18:56 +0000 Date: Thu, 6 Nov 2014 10:18:55 +0000 From: Russell King - ARM Linux To: "Kuankuan.Yang" Subject: Re: [PATCH 0/2] make imx hdmi publicly used by dw hdmi compatible platform Message-ID: <20141106101855.GN4042@n2100.arm.linux.org.uk> References: <1415107992-34289-1-git-send-email-andy.yan@rock-chips.com> <20141104142908.GG4042@n2100.arm.linux.org.uk> <545B40EC.2030001@rock-chips.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <545B40EC.2030001@rock-chips.com> User-Agent: Mutt/1.5.23 (2014-03-12) Cc: heiko@sntech.de, dri-devel@lists.freedesktop.org, devel@driverdev.osuosl.org, linux-rockchip@lists.infradead.org, Grant Likely , Dave Airlie , devicetree@vger.kernel.org, Zubair.Kakakhel@imgtec.com, Arnd Bergmann , Rob Herring , fabio.estevam@freescale.com, Josh Boyer , Greg Kroah-Hartman , linux-kernel@vger.kernel.org, djkurtz@google.com, Andy Yan X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.18 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" X-Spam-Status: No, score=-4.7 required=5.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_MED,RP_MATCHES_RCVD,T_DKIM_INVALID,UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP On Thu, Nov 06, 2014 at 05:35:40PM +0800, Kuankuan.Yang wrote: > I'm working on Designware hdmi-audio, also add it as a standard ALSA device. > Before I saw this email, I also planed to submit my patchs to upsteam. > I'm very grateful if you can email those patchs to us. I've attached the set of patches - they're part of a much bigger patch set for supporting the Cubox-i in mainline, but should apply cleanly. They're against a 3.17 base rather than 3.18-rc, but I do have these rebased as 3.18-rc2 based patches too. I've been waiting for imx-drm to move out of drivers/staging before deciding where they should live - there seems to be no good place in the sound/ subtree to place these (sound/soc is not the right place.) They're being used not only with the SolidRun Cubox-i and Hummingboard, but also the Novena project too. One thing the audio part does not yet support is using SDMA on iMX6 to feed updates to the audio DMA, so this driver should work with other non-iMX6 SDMA. Patches 21 to 23 are various attempts to try and fix a problem I've noticed only on certain iMX6 SoCs (two different revisions of the DW IP are used in iMX6 depending on whether it's the solo/dual-lite parts, or the dual/quad parts.) Inspite of the published errata, I found that the given workarounds had no useful effect on the problem, and like most bought-in IP, it's extremely difficult to resolve these kinds of issues from an open source perspective without having commercial links with manufacturers to gain access to internal documentation and/or support. The CEC bits provide a mostly compatible interface with the current FSL iMX BSP trees, but with a different structure to it, and hopefully less buggily than the FSL driver. There has been an effort to add support for the FSL interface to libcec, but when I've looked at the library, I've never been impressed by the code, nor by the authors handling of anything but a clean transmission (which IMHO makes the whole thing unsafe, especially if you have multiple devices on the CEC bus, you need the logical ID arbitration to work properly.) diff --git a/drivers/staging/imx-drm/Kconfig b/drivers/staging/imx-drm/Kconfig index 82fb758a29bc..008b544b9911 100644 --- a/drivers/staging/imx-drm/Kconfig +++ b/drivers/staging/imx-drm/Kconfig @@ -51,3 +51,11 @@ config DRM_IMX_HDMI depends on DRM_IMX help Choose this if you want to use HDMI on i.MX6. + +config DRM_DW_HDMI_AUDIO + tristate "Synopsis Designware Audio interface" + depends on DRM_IMX_HDMI != n + help + Support the Audio interface which is part of the Synopsis + Designware HDMI block. This is used in conjunction with + the i.MX HDMI driver. diff --git a/drivers/staging/imx-drm/Makefile b/drivers/staging/imx-drm/Makefile index 582c438d8cbd..07e65a410f8f 100644 --- a/drivers/staging/imx-drm/Makefile +++ b/drivers/staging/imx-drm/Makefile @@ -10,3 +10,4 @@ obj-$(CONFIG_DRM_IMX_LDB) += imx-ldb.o imx-ipuv3-crtc-objs := ipuv3-crtc.o ipuv3-plane.o obj-$(CONFIG_DRM_IMX_IPUV3) += imx-ipuv3-crtc.o obj-$(CONFIG_DRM_IMX_HDMI) += imx-hdmi.o +obj-$(CONFIG_DRM_DW_HDMI_AUDIO) += dw-hdmi-audio.o diff --git a/drivers/staging/imx-drm/dw-hdmi-audio.c b/drivers/staging/imx-drm/dw-hdmi-audio.c new file mode 100644 index 000000000000..4f9790dea6db --- /dev/null +++ b/drivers/staging/imx-drm/dw-hdmi-audio.c @@ -0,0 +1,547 @@ +/* + * DesignWare HDMI audio driver + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * Written and tested against the (alleged) DW HDMI Tx found in iMX6S. + */ +#include +#include +#include +#include + +#include +#include +#include +#include + +#include "dw-hdmi-audio.h" + +#define DRIVER_NAME "dw-hdmi-audio" + +/* Provide some bits rather than bit offsets */ +enum { + HDMI_AHB_DMA_CONF0_SW_FIFO_RST = BIT(7), + HDMI_AHB_DMA_CONF0_EN_HLOCK = BIT(3), + HDMI_AHB_DMA_START_START = BIT(0), + HDMI_AHB_DMA_STOP_STOP = BIT(0), + HDMI_IH_MUTE_AHBDMAAUD_STAT0_ERROR = BIT(5), + HDMI_IH_MUTE_AHBDMAAUD_STAT0_LOST = BIT(4), + HDMI_IH_MUTE_AHBDMAAUD_STAT0_RETRY = BIT(3), + HDMI_IH_MUTE_AHBDMAAUD_STAT0_DONE = BIT(2), + HDMI_IH_MUTE_AHBDMAAUD_STAT0_BUFFFULL = BIT(1), + HDMI_IH_MUTE_AHBDMAAUD_STAT0_BUFFEMPTY = BIT(0), + HDMI_IH_MUTE_AHBDMAAUD_STAT0_ALL = + HDMI_IH_MUTE_AHBDMAAUD_STAT0_ERROR | + HDMI_IH_MUTE_AHBDMAAUD_STAT0_LOST | + HDMI_IH_MUTE_AHBDMAAUD_STAT0_RETRY | + HDMI_IH_MUTE_AHBDMAAUD_STAT0_DONE | + HDMI_IH_MUTE_AHBDMAAUD_STAT0_BUFFFULL | + HDMI_IH_MUTE_AHBDMAAUD_STAT0_BUFFEMPTY, + HDMI_IH_AHBDMAAUD_STAT0_ERROR = BIT(5), + HDMI_IH_AHBDMAAUD_STAT0_LOST = BIT(4), + HDMI_IH_AHBDMAAUD_STAT0_RETRY = BIT(3), + HDMI_IH_AHBDMAAUD_STAT0_DONE = BIT(2), + HDMI_IH_AHBDMAAUD_STAT0_BUFFFULL = BIT(1), + HDMI_IH_AHBDMAAUD_STAT0_BUFFEMPTY = BIT(0), + HDMI_IH_AHBDMAAUD_STAT0_ALL = + HDMI_IH_AHBDMAAUD_STAT0_ERROR | + HDMI_IH_AHBDMAAUD_STAT0_LOST | + HDMI_IH_AHBDMAAUD_STAT0_RETRY | + HDMI_IH_AHBDMAAUD_STAT0_DONE | + HDMI_IH_AHBDMAAUD_STAT0_BUFFFULL | + HDMI_IH_AHBDMAAUD_STAT0_BUFFEMPTY, + HDMI_AHB_DMA_CONF0_INCR16 = 2 << 1, + HDMI_AHB_DMA_CONF0_INCR8 = 1 << 1, + HDMI_AHB_DMA_CONF0_INCR4 = 0, + HDMI_AHB_DMA_CONF0_BURST_MODE = BIT(0), + HDMI_AHB_DMA_MASK_DONE = BIT(7), + HDMI_REVISION_ID = 0x0001, + HDMI_IH_AHBDMAAUD_STAT0 = 0x0109, + HDMI_IH_MUTE_AHBDMAAUD_STAT0 = 0x0189, + HDMI_AHB_DMA_CONF0 = 0x3600, + HDMI_AHB_DMA_START = 0x3601, + HDMI_AHB_DMA_STOP = 0x3602, + HDMI_AHB_DMA_THRSLD = 0x3603, + HDMI_AHB_DMA_STRADDR0 = 0x3604, + HDMI_AHB_DMA_STPADDR0 = 0x3608, + HDMI_AHB_DMA_MASK = 0x3614, + HDMI_AHB_DMA_POL = 0x3615, + HDMI_AHB_DMA_CONF1 = 0x3616, + HDMI_AHB_DMA_BUFFPOL = 0x361a, +}; + +struct snd_dw_hdmi { + struct snd_card *card; + struct snd_pcm *pcm; + struct dw_hdmi_audio_data data; + struct snd_pcm_substream *substream; + void (*reformat)(struct snd_dw_hdmi *, size_t, size_t); + void *buf_src; + void *buf_dst; + dma_addr_t buf_addr; + unsigned buf_offset; + unsigned buf_period; + unsigned buf_size; + unsigned channels; + uint8_t revision; + uint8_t iec_offset; + uint8_t cs[192][8]; +}; + +static void dw_hdmi_writel(unsigned long val, void __iomem *ptr) +{ + writeb_relaxed(val, ptr); + writeb_relaxed(val >> 8, ptr + 1); + writeb_relaxed(val >> 16, ptr + 2); + writeb_relaxed(val >> 24, ptr + 3); +} + +/* + * Convert to hardware format: The userspace buffer contains IEC958 samples, + * with the PCUV bits in bits 31..28 and audio samples in bits 27..4. We + * need these to be in bits 27..24, with the IEC B bit in bit 28, and audio + * samples in 23..0. + * + * Default preamble in bits 3..0: 8 = block start, 4 = even 2 = odd + * + * Ideally, we could do with having the data properly formatted in userspace. + */ +static void dw_hdmi_reformat_iec958(struct snd_dw_hdmi *dw, + size_t offset, size_t bytes) +{ + uint32_t *src = dw->buf_src + offset; + uint32_t *dst = dw->buf_dst + offset; + uint32_t *end = dw->buf_src + offset + bytes; + + do { + uint32_t b, sample = *src++; + + b = (sample & 8) << (28 - 3); + + sample >>= 4; + + *dst++ = sample | b; + } while (src < end); +} + +static uint32_t parity(uint32_t sample) +{ + sample ^= sample >> 16; + sample ^= sample >> 8; + sample ^= sample >> 4; + sample ^= sample >> 2; + sample ^= sample >> 1; + return (sample & 1) << 27; +} + +static void dw_hdmi_reformat_s24(struct snd_dw_hdmi *dw, + size_t offset, size_t bytes) +{ + uint32_t *src = dw->buf_src + offset; + uint32_t *dst = dw->buf_dst + offset; + uint32_t *end = dw->buf_src + offset + bytes; + + do { + unsigned i; + uint8_t *cs; + + cs = dw->cs[dw->iec_offset++]; + if (dw->iec_offset >= 192) + dw->iec_offset = 0; + + i = dw->channels; + do { + uint32_t sample = *src++; + + sample &= ~0xff000000; + sample |= *cs++ << 24; + sample |= parity(sample & ~0xf8000000); + + *dst++ = sample; + } while (--i); + } while (src < end); +} + +static void dw_hdmi_create_cs(struct snd_dw_hdmi *dw, + struct snd_pcm_runtime *runtime) +{ + uint8_t cs[4]; + unsigned ch, i, j; + + cs[0] = IEC958_AES0_CON_NOT_COPYRIGHT | IEC958_AES0_CON_EMPHASIS_NONE; + cs[1] = IEC958_AES1_CON_GENERAL; + cs[2] = IEC958_AES2_CON_SOURCE_UNSPEC; + cs[3] = IEC958_AES3_CON_CLOCK_1000PPM; + + switch (runtime->rate) { + case 32000: + cs[3] |= IEC958_AES3_CON_FS_32000; + break; + case 44100: + cs[3] |= IEC958_AES3_CON_FS_44100; + break; + case 48000: + cs[3] |= IEC958_AES3_CON_FS_48000; + break; + case 88200: + cs[3] |= IEC958_AES3_CON_FS_88200; + break; + case 96000: + cs[3] |= IEC958_AES3_CON_FS_96000; + break; + case 176400: + cs[3] |= IEC958_AES3_CON_FS_176400; + break; + case 192000: + cs[3] |= IEC958_AES3_CON_FS_192000; + break; + } + + memset(dw->cs, 0, sizeof(dw->cs)); + + for (ch = 0; ch < 8; ch++) { + cs[2] &= ~IEC958_AES2_CON_CHANNEL; + cs[2] |= (ch + 1) << 4; + + for (i = 0; i < ARRAY_SIZE(cs); i++) { + unsigned c = cs[i]; + + for (j = 0; j < 8; j++, c >>= 1) + dw->cs[i * 8 + j][ch] = (c & 1) << 2; + } + } + dw->cs[0][0] |= BIT(4); +} + +static void dw_hdmi_start_dma(struct snd_dw_hdmi *dw) +{ + void __iomem *base = dw->data.base; + unsigned offset = dw->buf_offset; + unsigned period = dw->buf_period; + u32 start, stop; + + dw->reformat(dw, offset, period); + + /* Clear all irqs before enabling irqs and starting DMA */ + writeb_relaxed(HDMI_IH_AHBDMAAUD_STAT0_ALL, + base + HDMI_IH_AHBDMAAUD_STAT0); + + start = dw->buf_addr + offset; + stop = start + period - 1; + + /* Setup the hardware start/stop addresses */ + dw_hdmi_writel(start, base + HDMI_AHB_DMA_STRADDR0); + dw_hdmi_writel(stop, base + HDMI_AHB_DMA_STPADDR0); + + writeb_relaxed((u8)~HDMI_AHB_DMA_MASK_DONE, base + HDMI_AHB_DMA_MASK); + writeb(HDMI_AHB_DMA_START_START, base + HDMI_AHB_DMA_START); + + offset += period; + if (offset >= dw->buf_size) + offset = 0; + dw->buf_offset = offset; +} + +static void dw_hdmi_stop_dma(struct snd_dw_hdmi *dw) +{ + dw->substream = NULL; + + /* Disable interrupts before disabling DMA */ + writeb_relaxed(~0, dw->data.base + HDMI_AHB_DMA_MASK); + writeb_relaxed(HDMI_AHB_DMA_STOP_STOP, dw->data.base + HDMI_AHB_DMA_STOP); +} + +static irqreturn_t snd_dw_hdmi_irq(int irq, void *data) +{ + struct snd_dw_hdmi *dw = data; + struct snd_pcm_substream *substream; + unsigned stat; + + stat = readb_relaxed(dw->data.base + HDMI_IH_AHBDMAAUD_STAT0); + if (!stat) + return IRQ_NONE; + + writeb_relaxed(stat, dw->data.base + HDMI_IH_AHBDMAAUD_STAT0); + + substream = dw->substream; + if (stat & HDMI_IH_AHBDMAAUD_STAT0_DONE && substream) { + snd_pcm_period_elapsed(substream); + if (dw->substream) + dw_hdmi_start_dma(dw); + } + + return IRQ_HANDLED; +} + +static struct snd_pcm_hardware dw_hdmi_hw = { + .info = SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_BLOCK_TRANSFER | + SNDRV_PCM_INFO_MMAP | + SNDRV_PCM_INFO_MMAP_VALID, + .formats = SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE | + SNDRV_PCM_FMTBIT_S24_LE, + .rates = SNDRV_PCM_RATE_32000 | + SNDRV_PCM_RATE_44100 | + SNDRV_PCM_RATE_48000 | + SNDRV_PCM_RATE_88200 | + SNDRV_PCM_RATE_96000 | + SNDRV_PCM_RATE_176400 | + SNDRV_PCM_RATE_192000, + .channels_min = 2, + .channels_max = 8, + .buffer_bytes_max = 64 * 1024, + .period_bytes_min = 256, + .period_bytes_max = 8192, /* ERR004323: must limit to 8k */ + .periods_min = 2, + .periods_max = 16, + .fifo_size = 0, +}; + +static int dw_hdmi_open(struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + struct snd_dw_hdmi *dw = substream->private_data; + void __iomem *base = dw->data.base; + int ret; + + /* Clear FIFO */ + writeb_relaxed(HDMI_AHB_DMA_CONF0_SW_FIFO_RST, + base + HDMI_AHB_DMA_CONF0); + + /* Configure interrupt polarities */ + writeb_relaxed(~0, base + HDMI_AHB_DMA_POL); + writeb_relaxed(~0, base + HDMI_AHB_DMA_BUFFPOL); + + /* Keep interrupts masked, and clear any pending */ + writeb_relaxed(~0, base + HDMI_AHB_DMA_MASK); + writeb_relaxed(~0, base + HDMI_IH_AHBDMAAUD_STAT0); + + ret = request_irq(dw->data.irq, snd_dw_hdmi_irq, IRQF_SHARED, + "dw-hdmi-audio", dw); + if (ret) + return ret; + + /* Un-mute done interrupt */ + writeb_relaxed(HDMI_IH_MUTE_AHBDMAAUD_STAT0_ALL & + ~HDMI_IH_MUTE_AHBDMAAUD_STAT0_DONE, + base + HDMI_IH_MUTE_AHBDMAAUD_STAT0); + + runtime->hw = dw_hdmi_hw; + snd_pcm_limit_hw_rates(runtime); + + return 0; +} + +static int dw_hdmi_close(struct snd_pcm_substream *substream) +{ + struct snd_dw_hdmi *dw = substream->private_data; + + /* Mute all interrupts */ + writeb_relaxed(HDMI_IH_MUTE_AHBDMAAUD_STAT0_ALL, + dw->data.base + HDMI_IH_MUTE_AHBDMAAUD_STAT0); + + free_irq(dw->data.irq, dw); + + return 0; +} + +static int dw_hdmi_hw_free(struct snd_pcm_substream *substream) +{ + return snd_pcm_lib_free_vmalloc_buffer(substream); +} + +static int dw_hdmi_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params) +{ + return snd_pcm_lib_alloc_vmalloc_buffer(substream, + params_buffer_bytes(params)); +} + +static int dw_hdmi_prepare(struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + struct snd_dw_hdmi *dw = substream->private_data; + uint8_t threshold, conf0, conf1; + + /* Setup as per 3.0.5 FSL 4.1.0 BSP */ + switch (dw->revision) { + case 0x0a: + conf0 = HDMI_AHB_DMA_CONF0_BURST_MODE | + HDMI_AHB_DMA_CONF0_INCR4; + if (runtime->channels == 2) + threshold = 126; + else + threshold = 124; + break; + case 0x1a: + conf0 = HDMI_AHB_DMA_CONF0_BURST_MODE | + HDMI_AHB_DMA_CONF0_INCR8; + threshold = 128; + break; + default: + /* NOTREACHED */ + return -EINVAL; + } + + dw->data.set_sample_rate(dw->data.hdmi, runtime->rate); + + /* Minimum number of bytes in the fifo. */ + runtime->hw.fifo_size = threshold * 32; + + conf0 |= HDMI_AHB_DMA_CONF0_EN_HLOCK; + conf1 = (1 << runtime->channels) - 1; + + writeb_relaxed(threshold, dw->data.base + HDMI_AHB_DMA_THRSLD); + writeb_relaxed(conf0, dw->data.base + HDMI_AHB_DMA_CONF0); + writeb_relaxed(conf1, dw->data.base + HDMI_AHB_DMA_CONF1); + + switch (runtime->format) { + case SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE: + dw->reformat = dw_hdmi_reformat_iec958; + break; + case SNDRV_PCM_FORMAT_S24_LE: + dw_hdmi_create_cs(dw, runtime); + dw->reformat = dw_hdmi_reformat_s24; + break; + } + dw->iec_offset = 0; + dw->channels = runtime->channels; + dw->buf_src = runtime->dma_area; + dw->buf_dst = substream->dma_buffer.area; + dw->buf_addr = substream->dma_buffer.addr; + dw->buf_period = snd_pcm_lib_period_bytes(substream); + dw->buf_size = snd_pcm_lib_buffer_bytes(substream); + + return 0; +} + +static int dw_hdmi_trigger(struct snd_pcm_substream *substream, int cmd) +{ + struct snd_dw_hdmi *dw = substream->private_data; + int ret = 0; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + dw->buf_offset = 0; + dw->substream = substream; + dw_hdmi_start_dma(dw); + substream->runtime->delay = substream->runtime->period_size; + break; + + case SNDRV_PCM_TRIGGER_STOP: + dw_hdmi_stop_dma(dw); + break; + + default: + ret = -EINVAL; + break; + } + + return ret; +} + +static snd_pcm_uframes_t dw_hdmi_pointer(struct snd_pcm_substream *substream) +{ + struct snd_pcm_runtime *runtime = substream->runtime; + struct snd_dw_hdmi *dw = substream->private_data; + + return bytes_to_frames(runtime, dw->buf_offset); +} + +static struct snd_pcm_ops snd_dw_hdmi_ops = { + .open = dw_hdmi_open, + .close = dw_hdmi_close, + .ioctl = snd_pcm_lib_ioctl, + .hw_params = dw_hdmi_hw_params, + .hw_free = dw_hdmi_hw_free, + .prepare = dw_hdmi_prepare, + .trigger = dw_hdmi_trigger, + .pointer = dw_hdmi_pointer, + .page = snd_pcm_lib_get_vmalloc_page, +}; + +static int snd_dw_hdmi_probe(struct platform_device *pdev) +{ + const struct dw_hdmi_audio_data *data = pdev->dev.platform_data; + struct device *dev = pdev->dev.parent; + struct snd_dw_hdmi *dw; + struct snd_card *card; + struct snd_pcm *pcm; + unsigned revision; + int ret; + + writeb_relaxed(HDMI_IH_MUTE_AHBDMAAUD_STAT0_ALL, + data->base + HDMI_IH_MUTE_AHBDMAAUD_STAT0); + revision = readb_relaxed(data->base + HDMI_REVISION_ID); + if (revision != 0x0a && revision != 0x1a) { + dev_err(dev, "dw-hdmi-audio: unknown revision 0x%02x\n", + revision); + return -ENXIO; + } + + ret = snd_card_new(dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1, + THIS_MODULE, sizeof(struct snd_dw_hdmi), &card); + if (ret < 0) + return ret; + + strlcpy(card->driver, DRIVER_NAME, sizeof(card->driver)); + strlcpy(card->shortname, "DW-HDMI", sizeof(card->shortname)); + snprintf(card->longname, sizeof(card->longname), + "%s rev 0x%02x, irq %d", card->shortname, revision, + data->irq); + + dw = card->private_data; + dw->card = card; + dw->data = *data; + dw->revision = revision; + + ret = snd_pcm_new(card, "DW HDMI", 0, 1, 0, &pcm); + if (ret < 0) + goto err; + + dw->pcm = pcm; + pcm->private_data = dw; + strlcpy(pcm->name, DRIVER_NAME, sizeof(pcm->name)); + snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_dw_hdmi_ops); + + snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV, + dev, 64 * 1024, 64 * 1024); + + ret = snd_card_register(card); + if (ret < 0) + goto err; + + platform_set_drvdata(pdev, dw); + + return 0; + +err: + snd_card_free(card); + return ret; +} + +static int snd_dw_hdmi_remove(struct platform_device *pdev) +{ + struct snd_dw_hdmi *dw = platform_get_drvdata(pdev); + + snd_card_free(dw->card); + + return 0; +} + +static struct platform_driver snd_dw_hdmi_driver = { + .probe = snd_dw_hdmi_probe, + .remove = snd_dw_hdmi_remove, + .driver = { + .name = "dw-hdmi-audio", + .owner = THIS_MODULE, + }, +}; + +module_platform_driver(snd_dw_hdmi_driver); + +MODULE_AUTHOR("Russell King "); +MODULE_LICENSE("GPL"); diff --git a/drivers/staging/imx-drm/dw-hdmi-audio.h b/drivers/staging/imx-drm/dw-hdmi-audio.h new file mode 100644 index 000000000000..f01979d49efd --- /dev/null +++ b/drivers/staging/imx-drm/dw-hdmi-audio.h @@ -0,0 +1,14 @@ +#ifndef DW_HDMI_AUDIO_H +#define DW_HDMI_AUDIO_H + +struct imx_hdmi; + +struct dw_hdmi_audio_data { + phys_addr_t phys; + void __iomem *base; + int irq; + struct imx_hdmi *hdmi; + void (*set_sample_rate)(struct imx_hdmi *, unsigned); +}; + +#endif diff --git a/drivers/staging/imx-drm/imx-hdmi.c b/drivers/staging/imx-drm/imx-hdmi.c index 18c9ccd460b7..7efca1554d5a 100644 --- a/drivers/staging/imx-drm/imx-hdmi.c +++ b/drivers/staging/imx-drm/imx-hdmi.c @@ -29,6 +29,7 @@ #include #include