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Date: Mon, 31 Jan 2022 16:57:01 -0600
From: Bjorn Andersson <bjorn.andersson@...aro.org>
To: Akhil P Oommen <quic_akhilpo@...cinc.com>
Cc: freedreno <freedreno@...ts.freedesktop.org>,
dri-devel@...ts.freedesktop.org, linux-arm-msm@...r.kernel.org,
Rob Clark <robdclark@...il.com>,
OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS
<devicetree@...r.kernel.org>,
Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
Abhinav Kumar <quic_abhinavk@...cinc.com>,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>,
Daniel Vetter <daniel@...ll.ch>,
David Airlie <airlied@...ux.ie>,
Douglas Anderson <dianders@...omium.org>,
Eric Anholt <eric@...olt.net>,
Jonathan Marek <jonathan@...ek.ca>,
Jordan Crouse <jordan@...micpenguin.net>,
Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>,
Sean Paul <sean@...rly.run>,
Vladimir Lypak <vladimir.lypak@...il.com>,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/4] drm/msm/adreno: Add support for Adreno 8c Gen 3
On Wed 19 Jan 09:21 CST 2022, Akhil P Oommen wrote:
> Add support for "Adreno 8c Gen 3" gpu along with the necessary speedbin
> support.
>
> Signed-off-by: Akhil P Oommen <quic_akhilpo@...cinc.com>
> ---
>
> Changes in v2:
> - Fix a bug in adreno_cmp_rev()
>
> drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 21 ++++++++++++++----
> drivers/gpu/drm/msm/adreno/adreno_device.c | 34 +++++++++++++++++++++++++++---
> drivers/gpu/drm/msm/adreno/adreno_gpu.h | 10 +++++++--
> 3 files changed, 56 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
> index 51b8377..9268ce3 100644
> --- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
> +++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
> @@ -10,7 +10,6 @@
>
> #include <linux/bitfield.h>
> #include <linux/devfreq.h>
> -#include <linux/nvmem-consumer.h>
> #include <linux/soc/qcom/llcc-qcom.h>
>
> #define GPU_PAS_ID 13
> @@ -1734,6 +1733,18 @@ static u32 a618_get_speed_bin(u32 fuse)
> return UINT_MAX;
> }
>
> +static u32 adreno_7c3_get_speed_bin(u32 fuse)
> +{
> + if (fuse == 0)
> + return 0;
> + else if (fuse == 117)
> + return 0;
> + else if (fuse == 190)
Depending on your answer below this isn't an adreno_7c3 speed bin. I
think you should name this function adreno_635_get_speed_bin().
> + return 1;
> +
> + return UINT_MAX;
> +}
> +
> static u32 fuse_to_supp_hw(struct device *dev, struct adreno_rev rev, u32 fuse)
> {
> u32 val = UINT_MAX;
> @@ -1741,6 +1752,9 @@ static u32 fuse_to_supp_hw(struct device *dev, struct adreno_rev rev, u32 fuse)
> if (adreno_cmp_rev(ADRENO_REV(6, 1, 8, ANY_ID), rev))
> val = a618_get_speed_bin(fuse);
>
> + if (adreno_cmp_rev(ADRENO_REV(6, 3, 5, ANY_ID), rev))
> + val = adreno_7c3_get_speed_bin(fuse);
> +
> if (val == UINT_MAX) {
> DRM_DEV_ERROR(dev,
> "missing support for speed-bin: %u. Some OPPs may not be supported by hardware",
> @@ -1753,11 +1767,10 @@ static u32 fuse_to_supp_hw(struct device *dev, struct adreno_rev rev, u32 fuse)
>
> static int a6xx_set_supported_hw(struct device *dev, struct adreno_rev rev)
> {
> - u32 supp_hw = UINT_MAX;
> - u32 speedbin;
> + u32 speedbin, supp_hw = UINT_MAX;
> int ret;
>
> - ret = nvmem_cell_read_variable_le_u32(dev, "speed_bin", &speedbin);
> + ret = adreno_read_speedbin(dev, &speedbin);
> /*
> * -ENOENT means that the platform doesn't support speedbin which is
> * fine
> diff --git a/drivers/gpu/drm/msm/adreno/adreno_device.c b/drivers/gpu/drm/msm/adreno/adreno_device.c
> index 9300583..946f505 100644
> --- a/drivers/gpu/drm/msm/adreno/adreno_device.c
> +++ b/drivers/gpu/drm/msm/adreno/adreno_device.c
> @@ -6,6 +6,7 @@
> * Copyright (c) 2014,2017 The Linux Foundation. All rights reserved.
> */
>
> +#include <linux/nvmem-consumer.h>
> #include "adreno_gpu.h"
>
> bool hang_debug = false;
> @@ -317,6 +318,17 @@ static const struct adreno_info gpulist[] = {
> .zapfw = "a660_zap.mdt",
> .hwcg = a660_hwcg,
> }, {
> + .rev = ADRENO_REV_SKU(6, 3, 5, ANY_ID, 190),
So Adreno 7c Gen 3 revision 190 is actually a 8c Gen 3?
Why can't we just keep the marketing guys out the kernel and name things
based on what they really are!?
Regards,
Bjorn
> + .name = "Adreno 8c Gen 3",
> + .fw = {
> + [ADRENO_FW_SQE] = "a660_sqe.fw",
> + [ADRENO_FW_GMU] = "a660_gmu.bin",
> + },
> + .gmem = SZ_512K,
> + .inactive_period = DRM_MSM_INACTIVE_PERIOD,
> + .init = a6xx_gpu_init,
> + .hwcg = a660_hwcg,
> + }, {
> .rev = ADRENO_REV(6, 3, 5, ANY_ID),
> .name = "Adreno 7c Gen 3",
> .fw = {
> @@ -365,13 +377,19 @@ static inline bool _rev_match(uint8_t entry, uint8_t id)
> return (entry == ANY_ID) || (entry == id);
> }
>
> +static inline bool _rev_match_sku(uint16_t entry, uint16_t id)
> +{
> + return (entry == ANY_SKU) || (entry == id);
> +}
> +
> bool adreno_cmp_rev(struct adreno_rev rev1, struct adreno_rev rev2)
> {
>
> return _rev_match(rev1.core, rev2.core) &&
> _rev_match(rev1.major, rev2.major) &&
> _rev_match(rev1.minor, rev2.minor) &&
> - _rev_match(rev1.patchid, rev2.patchid);
> + _rev_match(rev1.patchid, rev2.patchid) &&
> + _rev_match_sku(rev1.sku, rev2.sku);
> }
>
> const struct adreno_info *adreno_info(struct adreno_rev rev)
> @@ -445,12 +463,17 @@ struct msm_gpu *adreno_load_gpu(struct drm_device *dev)
> return gpu;
> }
>
> +int adreno_read_speedbin(struct device *dev, u32 *speedbin)
> +{
> + return nvmem_cell_read_variable_le_u32(dev, "speed_bin", speedbin);
> +}
> +
> static int find_chipid(struct device *dev, struct adreno_rev *rev)
> {
> struct device_node *node = dev->of_node;
> const char *compat;
> int ret;
> - u32 chipid;
> + u32 chipid, speedbin;
>
> /* first search the compat strings for qcom,adreno-XYZ.W: */
> ret = of_property_read_string_index(node, "compatible", 0, &compat);
> @@ -466,7 +489,7 @@ static int find_chipid(struct device *dev, struct adreno_rev *rev)
> rev->minor = r;
> rev->patchid = patch;
>
> - return 0;
> + goto done;
> }
> }
>
> @@ -486,6 +509,11 @@ static int find_chipid(struct device *dev, struct adreno_rev *rev)
> dev_warn(dev, "Use compatible qcom,adreno-%u%u%u.%u instead.\n",
> rev->core, rev->major, rev->minor, rev->patchid);
>
> +done:
> + if (adreno_read_speedbin(dev, &speedbin))
> + speedbin = ANY_SKU;
> +
> + rev->sku = (uint16_t) (0xffff & speedbin);
> return 0;
> }
>
> diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.h b/drivers/gpu/drm/msm/adreno/adreno_gpu.h
> index cffabe7..52bd93a 100644
> --- a/drivers/gpu/drm/msm/adreno/adreno_gpu.h
> +++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.h
> @@ -40,12 +40,16 @@ struct adreno_rev {
> uint8_t major;
> uint8_t minor;
> uint8_t patchid;
> + uint16_t sku;
> };
>
> -#define ANY_ID 0xff
> +#define ANY_ID 0xff
> +#define ANY_SKU 0xffff
>
> #define ADRENO_REV(core, major, minor, patchid) \
> - ((struct adreno_rev){ core, major, minor, patchid })
> + ((struct adreno_rev){ core, major, minor, patchid, ANY_SKU })
> +#define ADRENO_REV_SKU(core, major, minor, patchid, sku) \
> + ((struct adreno_rev){ core, major, minor, patchid, sku })
>
> struct adreno_gpu_funcs {
> struct msm_gpu_funcs base;
> @@ -324,6 +328,8 @@ adreno_iommu_create_address_space(struct msm_gpu *gpu,
>
> void adreno_set_llc_attributes(struct iommu_domain *iommu);
>
> +int adreno_read_speedbin(struct device *dev, u32 *speedbin);
> +
> /*
> * For a5xx and a6xx targets load the zap shader that is used to pull the GPU
> * out of secure mode
> --
> 2.7.4
>
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