On 6/6/2023 12:09 PM, Dmitry Baryshkov wrote:
On 06/06/2023 20:51, Abhinav Kumar wrote:On 6/6/2023 4:14 AM, Dmitry Baryshkov wrote:On Tue, 6 Jun 2023 at 05:35, Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx> wrote:On 6/5/2023 6:03 PM, Dmitry Baryshkov wrote:On 06/06/2023 03:55, Abhinav Kumar wrote:On 6/3/2023 7:21 PM, Dmitry Baryshkov wrote:On 31/05/2023 21:25, Abhinav Kumar wrote:On 5/31/2023 3:07 AM, Dmitry Baryshkov wrote:On 31/05/2023 06:05, Abhinav Kumar wrote:On 5/30/2023 7:53 PM, Dmitry Baryshkov wrote:On Wed, 31 May 2023 at 03:54, Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx> wrote:With [1] dpu core revision was dropped in favor of using thecompatible string from the device tree to select the dpu catalogbeing used in the device.This approach works well however also necessitates adding catalog entries for small register level details as dpu capabilities and/or features bloating the catalog unnecessarily. Examples include butare not limited to data_compress, interrupt register set, widebus etc. Introduce the dpu core revision back as an entry to the catalog so that we can just use dpu revision checks and enable those bits whichshould be enabled unconditionally and not controlled by a catalogand also simplify the changes to do something like: if (dpu_core_revision > xxxxx && dpu_core_revision < xxxxx) enable the bit;Also, add some of the useful macros back to be able to use dpu corerevision effectively. [1]: https://patchwork.freedesktop.org/patch/530891/?series=113910&rev=4 Signed-off-by: Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx> --- .../msm/disp/dpu1/catalog/dpu_3_0_msm8998.h | 1 + .../msm/disp/dpu1/catalog/dpu_4_0_sdm845.h | 1 + .../msm/disp/dpu1/catalog/dpu_5_0_sm8150.h | 1 + .../msm/disp/dpu1/catalog/dpu_5_1_sc8180x.h | 1 + .../msm/disp/dpu1/catalog/dpu_6_0_sm8250.h | 1 + .../msm/disp/dpu1/catalog/dpu_6_2_sc7180.h | 1 + .../msm/disp/dpu1/catalog/dpu_6_3_sm6115.h | 1 + .../msm/disp/dpu1/catalog/dpu_6_5_qcm2290.h | 1 + .../msm/disp/dpu1/catalog/dpu_7_0_sm8350.h | 1 + .../msm/disp/dpu1/catalog/dpu_7_2_sc7280.h | 1 + .../msm/disp/dpu1/catalog/dpu_8_0_sc8280xp.h | 1 + .../msm/disp/dpu1/catalog/dpu_8_1_sm8450.h | 1 + .../msm/disp/dpu1/catalog/dpu_9_0_sm8550.h | 1 + .../gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h | 31 ++++++++++++++++++- 14 files changed, 43 insertions(+), 1 deletion(-)[skipped catalog changes]diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h index 677048cc3b7d..cc4aa75a1219 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h @@ -19,6 +19,33 @@ */ #define MAX_BLOCKS 12 +#define DPU_HW_VER(MAJOR, MINOR, STEP)\ + ((((unsigned int)MAJOR & 0xF) << 28) |\ + ((MINOR & 0xFFF) << 16) |\ + (STEP & 0xFFFF)) + +#define DPU_HW_MAJOR(rev)((rev) >> 28) +#define DPU_HW_MINOR(rev)(((rev) >> 16) & 0xFFF) +#define DPU_HW_STEP(rev)((rev) & 0xFFFF) +#define DPU_HW_MAJOR_MINOR(rev)((rev) >> 16) + +#define IS_DPU_MAJOR_MINOR_SAME(rev1, rev2) \ +(DPU_HW_MAJOR_MINOR((rev1)) == DPU_HW_MAJOR_MINOR((rev2))) + +#define DPU_HW_VER_300 DPU_HW_VER(3, 0, 0) /* 8998 v1.0 */ +#define DPU_HW_VER_400 DPU_HW_VER(4, 0, 0) /* sdm845 v1.0 */ +#define DPU_HW_VER_500 DPU_HW_VER(5, 0, 0) /* sm8150 v1.0 */ +#define DPU_HW_VER_510 DPU_HW_VER(5, 1, 1) /* sc8180 */ +#define DPU_HW_VER_600 DPU_HW_VER(6, 0, 0) /* sm8250 */ +#define DPU_HW_VER_620 DPU_HW_VER(6, 2, 0) /* sc7180 v1.0 */ +#define DPU_HW_VER_630 DPU_HW_VER(6, 3, 0) /* sm6115|sm4250 */+#define DPU_HW_VER_650 DPU_HW_VER(6, 5, 0) /* qcm2290|sm4125 */+#define DPU_HW_VER_700 DPU_HW_VER(7, 0, 0) /* sm8350 */ +#define DPU_HW_VER_720 DPU_HW_VER(7, 2, 0) /* sc7280 */ +#define DPU_HW_VER_800 DPU_HW_VER(8, 0, 0) /* sc8280xp */ +#define DPU_HW_VER_810 DPU_HW_VER(8, 1, 0) /* sm8450 */ +#define DPU_HW_VER_900 DPU_HW_VER(9, 0, 0) /* sm8550 */Instead of having defines for all SoCs (which can quickly becomeunmanageable) and can cause merge conflicts, I'd suggest inliningall the defines into respective catalog files.Sure, that can be done.Also, I'm not sure that the "step" should be a part of the catalog. I know that this follows the hardware revision. However, please correctme if I'm wrong, different step levels are used for revisions of the same SoC. The original code that was reading the hw revision fromthe hardware register, listed both 5.0.0 and 5.0.1 for sm8150.This is one of the things i noticed while making this change.Before the catalog rework, we used to handle even steps as we usedto read that from the register and match it with the mdss_cfg handler. But after the rework, we dont handle steps anymore. Yes, you are right that different step levels are used for the revisions of the same SOC and so with that, i dont expect oratleast am not aware of DPU differences between steps but I am notable to rule it out. So are you suggesting we drop step altogether and DPU_HW_VER()macro shall only handle major and minor versions? With the currentchipsets I see, it should not make a difference . Its just that I am not sure if that will never happen.Yes. The goal of this rework would be to drop generic features and to replace those checks with DPU-revision lookups. Correct?Yes thats right.I think that from this perspective having to handle toe step revision is a sign of an overkill. Having to handle the steprevision is a sign of paltform feature (or mis-feature) rather thana generic DPU bit.Not entirely. Lets not forget that at the moment even dpu_perf_cfg is part of the catalog. Even if in terms of major HW blocks steps shouldnt change, there is absolutely no guarantee that perf data cannot. This is what is the sticking point for me which is holding me back against dropping step. Thoughts?We usually do not support ES versions of the chips, only the final version. So supporting the perf data for earlier revisions is also not required.ack, we will drop step in that case. and good to know about the ES versions.In fact I suppose that even handling a minor revision would be an overkill. Why don't we start with .dpu_major instead of .core_rev? We can add .dpu_minor if/when required.No, unfortunately we cannot drop minor version for sure. I am seeing examples in downstream code where some of the features are availableafter a minor verion as well.Can you please give an example?Yes, watchdog timer, intf reset counter are available only after DPU HW version 8.1 (not major version 8).Hmm, IIRC, wd timer was available for ages. Was it moved together with the introduction of MDSS_PERIPH_0_REMOVED?I am not sure of the timeline but its certainly tied to 8.1.But anyway, I see your point. Let's have major and minor. I'd probably still ask for the separate major and minor fields, if you don't mind.hmmm so something like this? +#define DPU_HW_VER_300 DPU_HW_VER(3, 0) /* 8998 v1.0 */ const struct dpu_mdss_cfg dpu_msm8998_cfg = { ....... .dpu_major_rev = DPU_HW_MAJOR(DPU_HW_VER_300), .dpu_minor_rev = DPU_HW_MINOR(DPU_HW_VER_300)Just: const struct dpu_mdss_cfg dpu_msm8998_cfg = { .dpu_major_rev = 3, .dpu_minor_rev = 0, /* .... */ }; We do not need a single enumeration of all the versions. It can easily become a source of merge conflicts.The issue with this approch is then the DPU_HW_VER_xxx macros become redundant but we should keep them. Because in the code, its much more readable to haveif (core_rev > DPU_HW_MAJOR(DPU_HW_VER_xxx)) then enable feature; But now we will have to do if (dpu_major_rev > xxx && dpu_minor_ver > yyy) then enable feature; /// probably folks will question this xxx and yyy as to what it means.The first approach is less readable. It will require anybody to check, what is the major/minor of the mentioned XXX platform. In the second case we know exactly what we are looking for. E.g. we have new INTF interrupt addresses since 7.0. We have MDP_TOP_PERIPH0_REMOVED since 8.0 (or 8.1?) We have PP_TE until 5.0 (not included) and INTF_TE since 5.0.Having DPU_HW_VER_foo, I'd have to look up each time, what is the HW revision of sm8350, sc8280xp, sm8150, etc.
Agreed, it will avoid one extra lookup but are you comfortable with a hard-coded number in the code? So for example.
if (dpu_major_rev > 0x3 && dpu_minor_ver > 0x5) enable feature; Is this acceptable more than having to lookup? Thats my only concern.
