From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sugar Zhang Subject: [PATCH v3] ASoC: rockchip: spdif: restore register during runtime_suspend/resume cycle Date: Wed, 7 Sep 2016 14:30:21 +0800 Message-ID: <1473229821-54139-1-git-send-email-sugar.zhang@rock-chips.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: dianders@chromium.org, broonie@kernel.org Cc: alsa-devel@alsa-project.org, Heiko Stuebner , linux-kernel@vger.kernel.org, Takashi Iwai , Liam Girdwood , Sugar Zhang , linux-rockchip@lists.infradead.org, Jaroslav Kysela , linux-arm-kernel@lists.infradead.org List-Id: linux-rockchip.vger.kernel.org when step into runtime_suspend, spdif pd will be disabled and loss state. so need to restore register when runtime_resume. Signed-off-by: Sugar Zhang --- Changes in v3: - remove unneeded initialization Changes in v2: - remove system suspend/resume and restore register in runtime_suspend/resume per Doug Anderson's suggestion sound/soc/rockchip/rockchip_spdif.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/sound/soc/rockchip/rockchip_spdif.c b/sound/soc/rockchip/rockchip_spdif.c index 4ca2657..fa8101d 100644 --- a/sound/soc/rockchip/rockchip_spdif.c +++ b/sound/soc/rockchip/rockchip_spdif.c @@ -65,6 +65,7 @@ static int __maybe_unused rk_spdif_runtime_suspend(struct device *dev) { struct rk_spdif_dev *spdif = dev_get_drvdata(dev); + regcache_cache_only(spdif->regmap, true); clk_disable_unprepare(spdif->mclk); clk_disable_unprepare(spdif->hclk); @@ -88,7 +89,16 @@ static int __maybe_unused rk_spdif_runtime_resume(struct device *dev) return ret; } - return 0; + regcache_cache_only(spdif->regmap, false); + regcache_mark_dirty(spdif->regmap); + + ret = regcache_sync(spdif->regmap); + if (ret) { + clk_disable_unprepare(spdif->mclk); + clk_disable_unprepare(spdif->hclk); + } + + return ret; } static int rk_spdif_hw_params(struct snd_pcm_substream *substream, -- 1.9.1