On Fri, Jan 18, 2019 at 01:24:18PM -0700, Jordan Crouse wrote: > Try to get the interconnect path for the GPU and vote for the maximum > bandwidth to support all frequencies. This is needed for performance. > Later we will want to scale the bandwidth based on the frequency to > also optimize for power but that will require some device tree > infrastructure that does not yet exist. > > v6: use icc_set_bw() instead of icc_set() > v5: Remove hardcoded interconnect name and just use the default > v4: Don't use a port string at all to skip the need for names in the DT > v3: Use macros and change port string per Georgi Djakov > > Signed-off-by: Jordan Crouse <jcrouse@xxxxxxxxxxxxxx> In my excitement I forgot to mention that this depends on: https://patchwork.kernel.org/patch/10766335/ > --- > > drivers/gpu/drm/msm/Kconfig | 1 + > drivers/gpu/drm/msm/adreno/a6xx_gmu.c | 20 ++++++++++++++++++++ > drivers/gpu/drm/msm/adreno/adreno_gpu.c | 9 +++++++++ > drivers/gpu/drm/msm/msm_gpu.h | 3 +++ > 4 files changed, 33 insertions(+) > > diff --git a/drivers/gpu/drm/msm/Kconfig b/drivers/gpu/drm/msm/Kconfig > index cf549f1..78c9e5a5 100644 > --- a/drivers/gpu/drm/msm/Kconfig > +++ b/drivers/gpu/drm/msm/Kconfig > @@ -5,6 +5,7 @@ config DRM_MSM > depends on ARCH_QCOM || SOC_IMX5 || (ARM && COMPILE_TEST) > depends on OF && COMMON_CLK > depends on MMU > + depends on INTERCONNECT || !INTERCONNECT > select QCOM_MDT_LOADER if ARCH_QCOM > select REGULATOR > select DRM_KMS_HELPER > diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c > index 5beb83d..c48fe46 100644 > --- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c > +++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c > @@ -2,6 +2,7 @@ > /* Copyright (c) 2017-2018 The Linux Foundation. All rights reserved. */ > > #include <linux/clk.h> > +#include <linux/interconnect.h> > #include <linux/pm_opp.h> > #include <soc/qcom/cmd-db.h> > > @@ -84,6 +85,9 @@ bool a6xx_gmu_gx_is_on(struct a6xx_gmu *gmu) > > static void __a6xx_gmu_set_freq(struct a6xx_gmu *gmu, int index) > { > + struct a6xx_gpu *a6xx_gpu = container_of(gmu, struct a6xx_gpu, gmu); > + struct adreno_gpu *adreno_gpu = &a6xx_gpu->base; > + struct msm_gpu *gpu = &adreno_gpu->base; > int ret; > > gmu_write(gmu, REG_A6XX_GMU_DCVS_ACK_OPTION, 0); > @@ -106,6 +110,12 @@ static void __a6xx_gmu_set_freq(struct a6xx_gmu *gmu, int index) > dev_err(gmu->dev, "GMU set GPU frequency error: %d\n", ret); > > gmu->freq = gmu->gpu_freqs[index]; > + > + /* > + * Eventually we will want to scale the path vote with the frequency but > + * for now leave it at max so that the performance is nominal. > + */ > + icc_set_bw(gpu->icc_path, 0, MBps_to_icc(7216)); > } > > void a6xx_gmu_set_freq(struct msm_gpu *gpu, unsigned long freq) > @@ -705,6 +715,8 @@ int a6xx_gmu_reset(struct a6xx_gpu *a6xx_gpu) > > int a6xx_gmu_resume(struct a6xx_gpu *a6xx_gpu) > { > + struct adreno_gpu *adreno_gpu = &a6xx_gpu->base; > + struct msm_gpu *gpu = &adreno_gpu->base; > struct a6xx_gmu *gmu = &a6xx_gpu->gmu; > int status, ret; > > @@ -720,6 +732,9 @@ int a6xx_gmu_resume(struct a6xx_gpu *a6xx_gpu) > if (ret) > goto out; > > + /* Set the bus quota to a reasonable value for boot */ > + icc_set_bw(gpu->icc_path, 0, MBps_to_icc(3072)); > + > a6xx_gmu_irq_enable(gmu); > > /* Check to see if we are doing a cold or warm boot */ > @@ -760,6 +775,8 @@ bool a6xx_gmu_isidle(struct a6xx_gmu *gmu) > > int a6xx_gmu_stop(struct a6xx_gpu *a6xx_gpu) > { > + struct adreno_gpu *adreno_gpu = &a6xx_gpu->base; > + struct msm_gpu *gpu = &adreno_gpu->base; > struct a6xx_gmu *gmu = &a6xx_gpu->gmu; > u32 val; > > @@ -806,6 +823,9 @@ int a6xx_gmu_stop(struct a6xx_gpu *a6xx_gpu) > /* Tell RPMh to power off the GPU */ > a6xx_rpmh_stop(gmu); > > + /* Remove the bus vote */ > + icc_set_bw(gpu->icc_path, 0, 0); > + > clk_bulk_disable_unprepare(gmu->nr_clocks, gmu->clocks); > > pm_runtime_put_sync(gmu->dev); > diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c > index 2e4372e..91a98c8 100644 > --- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c > +++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c > @@ -18,6 +18,7 @@ > */ > > #include <linux/ascii85.h> > +#include <linux/interconnect.h> > #include <linux/kernel.h> > #include <linux/pm_opp.h> > #include <linux/slab.h> > @@ -747,6 +748,11 @@ static int adreno_get_pwrlevels(struct device *dev, > > DBG("fast_rate=%u, slow_rate=27000000", gpu->fast_rate); > > + /* Check for an interconnect path for the bus */ > + gpu->icc_path = of_icc_get(dev, NULL); > + if (IS_ERR(gpu->icc_path)) > + gpu->icc_path = NULL; > + > return 0; > } > > @@ -788,10 +794,13 @@ int adreno_gpu_init(struct drm_device *drm, struct platform_device *pdev, > > void adreno_gpu_cleanup(struct adreno_gpu *adreno_gpu) > { > + struct msm_gpu *gpu = &adreno_gpu->base; > unsigned int i; > > for (i = 0; i < ARRAY_SIZE(adreno_gpu->info->fw); i++) > release_firmware(adreno_gpu->fw[i]); > > + icc_put(gpu->icc_path); > + > msm_gpu_cleanup(&adreno_gpu->base); > } > diff --git a/drivers/gpu/drm/msm/msm_gpu.h b/drivers/gpu/drm/msm/msm_gpu.h > index efb49bb..2f13592a 100644 > --- a/drivers/gpu/drm/msm/msm_gpu.h > +++ b/drivers/gpu/drm/msm/msm_gpu.h > @@ -19,6 +19,7 @@ > #define __MSM_GPU_H__ > > #include <linux/clk.h> > +#include <linux/interconnect.h> > #include <linux/regulator/consumer.h> > > #include "msm_drv.h" > @@ -119,6 +120,8 @@ struct msm_gpu { > struct clk *ebi1_clk, *core_clk, *rbbmtimer_clk; > uint32_t fast_rate; > > + struct icc_path *icc_path; > + > /* Hang and Inactivity Detection: > */ > #define DRM_MSM_INACTIVE_PERIOD 66 /* in ms (roughly four frames) */ > -- > 2.7.4 > > _______________________________________________ > Freedreno mailing list > Freedreno@xxxxxxxxxxxxxxxxxxxxx > https://lists.freedesktop.org/mailman/listinfo/freedreno -- The Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, a Linux Foundation Collaborative Project
