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Wed, 22 Apr 2020 00:00:26 -0400 (EDT) From: Samuel Holland To: Maxime Ripard , Paul Kocialkowski , Chen-Yu Tsai , Mauro Carvalho Chehab , Greg Kroah-Hartman Subject: [PATCH v2 2/2] media: cedrus: Implement runtime PM Date: Tue, 21 Apr 2020 23:04:10 -0500 Message-Id: <20200422040410.6251-2-samuel@sholland.org> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200422040410.6251-1-samuel@sholland.org> References: <20200422040410.6251-1-samuel@sholland.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200421_210028_414450_00153165 X-CRM114-Status: GOOD ( 15.71 ) X-Spam-Score: -0.9 (/) X-Spam-Report: SpamAssassin version 3.4.4 on bombadil.infradead.org summary: Content analysis details: (-0.9 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at https://www.dnswl.org/, low trust [66.111.4.221 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 RCVD_IN_MSPIKE_H3 RBL: Good reputation (+3) [66.111.4.221 listed in wl.mailspike.net] -0.0 SPF_HELO_PASS SPF: HELO matches SPF record -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.0 RCVD_IN_MSPIKE_WL Mailspike good senders X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Samuel Holland , linux-kernel@vger.kernel.org, =?utf-8?q?Jernej_=C5=A0krabec?= , linux-sunxi@googlegroups.com, linux-arm-kernel@lists.infradead.org, linux-media@vger.kernel.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org This allows the VE clocks and PLL_VE to be disabled most of the time. A runtime PM reference is held while streaming. Originally-by: Jernej Škrabec Signed-off-by: Samuel Holland Tested-by: Jernej Skrabec Reviewed-by: Ezequiel Garcia --- v2: moved PM reference to cedrus_{start,stop}_streaming, based on an earlier patch by Jernej Skrabec. Removes the need for autosuspend. I tested this with running 2x v4l2-request-test in parallel. --- drivers/staging/media/sunxi/cedrus/cedrus.c | 7 ++ .../staging/media/sunxi/cedrus/cedrus_hw.c | 106 ++++++++++++------ .../staging/media/sunxi/cedrus/cedrus_hw.h | 3 + .../staging/media/sunxi/cedrus/cedrus_video.c | 33 ++++-- 4 files changed, 104 insertions(+), 45 deletions(-) diff --git a/drivers/staging/media/sunxi/cedrus/cedrus.c b/drivers/staging/media/sunxi/cedrus/cedrus.c index 05a85517ff60..bc27f9430eeb 100644 --- a/drivers/staging/media/sunxi/cedrus/cedrus.c +++ b/drivers/staging/media/sunxi/cedrus/cedrus.c @@ -16,6 +16,7 @@ #include #include #include +#include #include #include @@ -551,12 +552,18 @@ static const struct of_device_id cedrus_dt_match[] = { }; MODULE_DEVICE_TABLE(of, cedrus_dt_match); +static const struct dev_pm_ops cedrus_dev_pm_ops = { + SET_RUNTIME_PM_OPS(cedrus_hw_suspend, + cedrus_hw_resume, NULL) +}; + static struct platform_driver cedrus_driver = { .probe = cedrus_probe, .remove = cedrus_remove, .driver = { .name = CEDRUS_NAME, .of_match_table = of_match_ptr(cedrus_dt_match), + .pm = &cedrus_dev_pm_ops, }, }; module_platform_driver(cedrus_driver); diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_hw.c b/drivers/staging/media/sunxi/cedrus/cedrus_hw.c index daf5f244f93b..1744e6fcc999 100644 --- a/drivers/staging/media/sunxi/cedrus/cedrus_hw.c +++ b/drivers/staging/media/sunxi/cedrus/cedrus_hw.c @@ -19,6 +19,7 @@ #include #include #include +#include #include #include #include @@ -140,6 +141,64 @@ static irqreturn_t cedrus_irq(int irq, void *data) return IRQ_HANDLED; } +int cedrus_hw_suspend(struct device *device) +{ + struct cedrus_dev *dev = dev_get_drvdata(device); + + reset_control_assert(dev->rstc); + + clk_disable_unprepare(dev->ram_clk); + clk_disable_unprepare(dev->mod_clk); + clk_disable_unprepare(dev->ahb_clk); + + return 0; +} + +int cedrus_hw_resume(struct device *device) +{ + struct cedrus_dev *dev = dev_get_drvdata(device); + int ret; + + ret = clk_prepare_enable(dev->ahb_clk); + if (ret) { + dev_err(dev->dev, "Failed to enable AHB clock\n"); + + return ret; + } + + ret = clk_prepare_enable(dev->mod_clk); + if (ret) { + dev_err(dev->dev, "Failed to enable MOD clock\n"); + + goto err_ahb_clk; + } + + ret = clk_prepare_enable(dev->ram_clk); + if (ret) { + dev_err(dev->dev, "Failed to enable RAM clock\n"); + + goto err_mod_clk; + } + + ret = reset_control_reset(dev->rstc); + if (ret) { + dev_err(dev->dev, "Failed to apply reset\n"); + + goto err_ram_clk; + } + + return 0; + +err_ram_clk: + clk_disable_unprepare(dev->ram_clk); +err_mod_clk: + clk_disable_unprepare(dev->mod_clk); +err_ahb_clk: + clk_disable_unprepare(dev->ahb_clk); + + return ret; +} + int cedrus_hw_probe(struct cedrus_dev *dev) { const struct cedrus_variant *variant; @@ -236,42 +295,17 @@ int cedrus_hw_probe(struct cedrus_dev *dev) goto err_sram; } - ret = clk_prepare_enable(dev->ahb_clk); - if (ret) { - dev_err(dev->dev, "Failed to enable AHB clock\n"); - - goto err_sram; - } - - ret = clk_prepare_enable(dev->mod_clk); - if (ret) { - dev_err(dev->dev, "Failed to enable MOD clock\n"); - - goto err_ahb_clk; - } - - ret = clk_prepare_enable(dev->ram_clk); - if (ret) { - dev_err(dev->dev, "Failed to enable RAM clock\n"); - - goto err_mod_clk; - } - - ret = reset_control_reset(dev->rstc); - if (ret) { - dev_err(dev->dev, "Failed to apply reset\n"); - - goto err_ram_clk; + pm_runtime_enable(dev->dev); + if (!pm_runtime_enabled(dev->dev)) { + ret = cedrus_hw_resume(dev->dev); + if (ret) + goto err_pm; } return 0; -err_ram_clk: - clk_disable_unprepare(dev->ram_clk); -err_mod_clk: - clk_disable_unprepare(dev->mod_clk); -err_ahb_clk: - clk_disable_unprepare(dev->ahb_clk); +err_pm: + pm_runtime_disable(dev->dev); err_sram: sunxi_sram_release(dev->dev); err_mem: @@ -282,11 +316,9 @@ int cedrus_hw_probe(struct cedrus_dev *dev) void cedrus_hw_remove(struct cedrus_dev *dev) { - reset_control_assert(dev->rstc); - - clk_disable_unprepare(dev->ram_clk); - clk_disable_unprepare(dev->mod_clk); - clk_disable_unprepare(dev->ahb_clk); + pm_runtime_disable(dev->dev); + if (!pm_runtime_status_suspended(dev->dev)) + cedrus_hw_suspend(dev->dev); sunxi_sram_release(dev->dev); diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_hw.h b/drivers/staging/media/sunxi/cedrus/cedrus_hw.h index 604ff932fbf5..45f641f0bfa2 100644 --- a/drivers/staging/media/sunxi/cedrus/cedrus_hw.h +++ b/drivers/staging/media/sunxi/cedrus/cedrus_hw.h @@ -22,6 +22,9 @@ void cedrus_engine_disable(struct cedrus_dev *dev); void cedrus_dst_format_set(struct cedrus_dev *dev, struct v4l2_pix_format *fmt); +int cedrus_hw_suspend(struct device *device); +int cedrus_hw_resume(struct device *device); + int cedrus_hw_probe(struct cedrus_dev *dev); void cedrus_hw_remove(struct cedrus_dev *dev); diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_video.c b/drivers/staging/media/sunxi/cedrus/cedrus_video.c index ed3f511f066f..16d82309e7b6 100644 --- a/drivers/staging/media/sunxi/cedrus/cedrus_video.c +++ b/drivers/staging/media/sunxi/cedrus/cedrus_video.c @@ -13,6 +13,8 @@ * Marek Szyprowski, */ +#include + #include #include #include @@ -450,12 +452,24 @@ static int cedrus_start_streaming(struct vb2_queue *vq, unsigned int count) return -EINVAL; } - if (V4L2_TYPE_IS_OUTPUT(vq->type) && - dev->dec_ops[ctx->current_codec]->start) - ret = dev->dec_ops[ctx->current_codec]->start(ctx); + if (V4L2_TYPE_IS_OUTPUT(vq->type)) { + ret = pm_runtime_get_sync(dev->dev); + if (ret < 0) + goto err_cleanup; - if (ret) - cedrus_queue_cleanup(vq, VB2_BUF_STATE_QUEUED); + if (dev->dec_ops[ctx->current_codec]->start) { + ret = dev->dec_ops[ctx->current_codec]->start(ctx); + if (ret) + goto err_pm; + } + } + + return 0; + +err_pm: + pm_runtime_put(dev->dev); +err_cleanup: + cedrus_queue_cleanup(vq, VB2_BUF_STATE_QUEUED); return ret; } @@ -465,9 +479,12 @@ static void cedrus_stop_streaming(struct vb2_queue *vq) struct cedrus_ctx *ctx = vb2_get_drv_priv(vq); struct cedrus_dev *dev = ctx->dev; - if (V4L2_TYPE_IS_OUTPUT(vq->type) && - dev->dec_ops[ctx->current_codec]->stop) - dev->dec_ops[ctx->current_codec]->stop(ctx); + if (V4L2_TYPE_IS_OUTPUT(vq->type)) { + if (dev->dec_ops[ctx->current_codec]->stop) + dev->dec_ops[ctx->current_codec]->stop(ctx); + + pm_runtime_put(dev->dev); + } cedrus_queue_cleanup(vq, VB2_BUF_STATE_ERROR); }