From patchwork Fri May 25 10:30:46 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sharat Masetty X-Patchwork-Id: 10426993 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 82E216032C for ; Fri, 25 May 2018 10:31:08 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 64B312962A for ; Fri, 25 May 2018 10:31:08 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 597A329644; Fri, 25 May 2018 10:31:08 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 016B62962A for ; Fri, 25 May 2018 10:31:08 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 63A476E91A; Fri, 25 May 2018 10:31:06 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from smtp.codeaurora.org (smtp.codeaurora.org [198.145.29.96]) by gabe.freedesktop.org (Postfix) with ESMTPS id D3B1C6E919; Fri, 25 May 2018 10:31:04 +0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 1000) id BC9FE60B23; Fri, 25 May 2018 10:31:04 +0000 (UTC) Received: from smasetty-linux.qualcomm.com (blr-c-bdr-fw-01_globalnat_allzones-outside.qualcomm.com [103.229.19.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: smasetty@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 05B5060C65; Fri, 25 May 2018 10:31:01 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 05B5060C65 From: Sharat Masetty To: freedreno@lists.freedesktop.org Subject: [PATCH 3/3] drm/msm: re-factor devfreq code Date: Fri, 25 May 2018 16:00:46 +0530 Message-Id: <1527244246-10519-4-git-send-email-smasetty@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1527244246-10519-1-git-send-email-smasetty@codeaurora.org> References: <1527244246-10519-1-git-send-email-smasetty@codeaurora.org> X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arm-msm@vger.kernel.org, Sharat Masetty , dri-devel@lists.freedesktop.org MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP devfreq framework requires the drivers to provide busy time estimations. The GPU driver relies on the hardware performance counters for the busy time estimations, but different hardware revisions have counters which can be sourced from different clocks. So the busy time estimation will be target dependent. Additionally on targets where the clocks are completely controlled by the on chip microcontroller, fetching and setting the current GPU frequency will be different. This patch aims to embrace these differences by re-factoring the devfreq code a bit. Signed-off-by: Sharat Masetty --- drivers/gpu/drm/msm/adreno/a5xx_gpu.c | 15 +++++++++++---- drivers/gpu/drm/msm/msm_gpu.c | 23 ++++++++++++++--------- drivers/gpu/drm/msm/msm_gpu.h | 4 +++- 3 files changed, 28 insertions(+), 14 deletions(-) diff --git a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c index d39400e..a35a840 100644 --- a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c +++ b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c @@ -1219,12 +1219,19 @@ static struct msm_ringbuffer *a5xx_active_ring(struct msm_gpu *gpu) return a5xx_gpu->cur_ring; } -static int a5xx_gpu_busy(struct msm_gpu *gpu, uint64_t *value) +static u64 a5xx_gpu_busy(struct msm_gpu *gpu) { - *value = gpu_read64(gpu, REG_A5XX_RBBM_PERFCTR_RBBM_0_LO, - REG_A5XX_RBBM_PERFCTR_RBBM_0_HI); + u64 busy_cycles, busy_time; - return 0; + busy_cycles = gpu_read64(gpu, REG_A5XX_RBBM_PERFCTR_RBBM_0_LO, + REG_A5XX_RBBM_PERFCTR_RBBM_0_HI); + + busy_time = (busy_cycles - gpu->devfreq.busy_cycles) / + (clk_get_rate(gpu->core_clk) / 1000000); + + gpu->devfreq.busy_cycles = busy_cycles; + + return busy_time; } static const struct adreno_gpu_funcs funcs = { diff --git a/drivers/gpu/drm/msm/msm_gpu.c b/drivers/gpu/drm/msm/msm_gpu.c index d8d4fc9..f437ee8 100644 --- a/drivers/gpu/drm/msm/msm_gpu.c +++ b/drivers/gpu/drm/msm/msm_gpu.c @@ -40,7 +40,11 @@ static int msm_devfreq_target(struct device *dev, unsigned long *freq, if (IS_ERR(opp)) return PTR_ERR(opp); - clk_set_rate(gpu->core_clk, *freq); + if (gpu->funcs->gpu_set_freq) + gpu->funcs->gpu_set_freq(gpu, (u64)*freq); + else + clk_set_rate(gpu->core_clk, *freq); + dev_pm_opp_put(opp); return 0; @@ -50,16 +54,14 @@ static int msm_devfreq_get_dev_status(struct device *dev, struct devfreq_dev_status *status) { struct msm_gpu *gpu = platform_get_drvdata(to_platform_device(dev)); - u64 cycles; - u32 freq = ((u32) status->current_frequency) / 1000000; ktime_t time; - status->current_frequency = (unsigned long) clk_get_rate(gpu->core_clk); - gpu->funcs->gpu_busy(gpu, &cycles); - - status->busy_time = ((u32) (cycles - gpu->devfreq.busy_cycles)) / freq; + if (gpu->funcs->gpu_get_freq) + status->current_frequency = gpu->funcs->gpu_get_freq(gpu); + else + status->current_frequency = clk_get_rate(gpu->core_clk); - gpu->devfreq.busy_cycles = cycles; + status->busy_time = gpu->funcs->gpu_busy(gpu); time = ktime_get(); status->total_time = ktime_us_delta(time, gpu->devfreq.time); @@ -72,7 +74,10 @@ static int msm_devfreq_get_cur_freq(struct device *dev, unsigned long *freq) { struct msm_gpu *gpu = platform_get_drvdata(to_platform_device(dev)); - *freq = (unsigned long) clk_get_rate(gpu->core_clk); + if (gpu->funcs->gpu_get_freq) + *freq = gpu->funcs->gpu_get_freq(gpu); + else + *freq = clk_get_rate(gpu->core_clk); return 0; } diff --git a/drivers/gpu/drm/msm/msm_gpu.h b/drivers/gpu/drm/msm/msm_gpu.h index 1876b81..d3f02e7 100644 --- a/drivers/gpu/drm/msm/msm_gpu.h +++ b/drivers/gpu/drm/msm/msm_gpu.h @@ -68,7 +68,9 @@ struct msm_gpu_funcs { /* for generation specific debugfs: */ int (*debugfs_init)(struct msm_gpu *gpu, struct drm_minor *minor); #endif - int (*gpu_busy)(struct msm_gpu *gpu, uint64_t *value); + u64 (*gpu_busy)(struct msm_gpu *gpu); + u64 (*gpu_get_freq)(struct msm_gpu *gpu); + int (*gpu_set_freq)(struct msm_gpu *gpu, u64 freq); }; struct msm_gpu {