From: Jani Nikula <jani.nikula@intel.com>
To: Matt Roper <matthew.d.roper@intel.com>
Cc: intel-gfx@lists.freedesktop.org, intel-xe@lists.freedesktop.org,
lucas.demarchi@intel.com, rodrigo.vivi@intel.com
Subject: Re: [PATCH 07/10] drm/i915/display: identify display steppings in display probe
Date: Wed, 21 Aug 2024 11:59:50 +0300 [thread overview]
Message-ID: <875xru5jzt.fsf@intel.com> (raw)
In-Reply-To: <20240820235245.GS5091@mdroper-desk1.amr.corp.intel.com>
On Tue, 20 Aug 2024, Matt Roper <matthew.d.roper@intel.com> wrote:
> On Tue, Aug 20, 2024 at 10:00:40PM +0300, Jani Nikula wrote:
>> Both i915 and xe have code to identify display steppings. Start
>> deduplicating this by, uh, adding a third copy in display code. This is
>> not yet used for anything other than debug logging. We'll switch over
>> later.
>>
>> For platforms before GMD ID, attach the mapping from PCI revision to
>> stepping in the platform and subplatform descriptors. This is a
>> considerably cleaner approach than having it completely separate.
>>
>> Also add a separate field for stepping in display runtime info,
>> preserving the value from GMD ID.
>>
>> Signed-off-by: Jani Nikula <jani.nikula@intel.com>
>> ---
>> .../drm/i915/display/intel_display_device.c | 224 +++++++++++++++++-
>> .../drm/i915/display/intel_display_device.h | 3 +-
>> .../drm/xe/compat-i915-headers/intel_step.h | 1 +
>> 3 files changed, 216 insertions(+), 12 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/i915/display/intel_display_device.c b/drivers/gpu/drm/i915/display/intel_display_device.c
>> index a31f89df2c0a..1ac3ab3954a1 100644
>> --- a/drivers/gpu/drm/i915/display/intel_display_device.c
>> +++ b/drivers/gpu/drm/i915/display/intel_display_device.c
>> @@ -16,14 +16,25 @@
>> #include "intel_display_power.h"
>> #include "intel_display_reg_defs.h"
>> #include "intel_fbc.h"
>> +#include "intel_step.h"
>>
>> __diag_push();
>> __diag_ignore_all("-Woverride-init", "Allow field initialization overrides for display info");
>>
>> +struct stepping_desc {
>> + const enum intel_step *map; /* revid to step map */
>> + size_t size; /* map size */
>> +};
>> +
>> +#define STEP_INFO(_map) \
>> + .step_info.map = _map, \
>> + .step_info.size = ARRAY_SIZE(_map)
>> +
>> struct subplatform_desc {
>> enum intel_display_subplatform subplatform;
>> const char *name;
>> const u16 *pciidlist;
>> + struct stepping_desc step_info;
>> };
>>
>> struct platform_desc {
>> @@ -31,6 +42,7 @@ struct platform_desc {
>> const char *name;
>> const struct subplatform_desc *subplatforms;
>> const struct intel_display_device_info *info; /* NULL for GMD ID */
>> + struct stepping_desc step_info;
>> };
>>
>> #define PLATFORM(_platform) \
>> @@ -610,6 +622,13 @@ static const u16 skl_ulx_ids[] = {
>> 0
>> };
>>
>> +static const enum intel_step skl_steppings[] = {
>> + [0x6] = STEP_G0,
>> + [0x7] = STEP_H0,
>> + [0x9] = STEP_J0,
>> + [0xA] = STEP_I1,
>> +};
>> +
>> static const struct platform_desc skl_desc = {
>> PLATFORM(SKYLAKE),
>> .subplatforms = (const struct subplatform_desc[]) {
>> @@ -618,6 +637,7 @@ static const struct platform_desc skl_desc = {
>> {},
>> },
>> .info = &skl_display,
>> + STEP_INFO(skl_steppings),
>> };
>>
>> static const u16 kbl_ult_ids[] = {
>> @@ -634,6 +654,16 @@ static const u16 kbl_ulx_ids[] = {
>> 0
>> };
>>
>> +static const enum intel_step kbl_steppings[] = {
>> + [1] = STEP_B0,
>> + [2] = STEP_B0,
>> + [3] = STEP_B0,
>> + [4] = STEP_C0,
>> + [5] = STEP_B1,
>> + [6] = STEP_B1,
>> + [7] = STEP_C0,
>> +};
>> +
>> static const struct platform_desc kbl_desc = {
>> PLATFORM(KABYLAKE),
>> .subplatforms = (const struct subplatform_desc[]) {
>> @@ -642,6 +672,7 @@ static const struct platform_desc kbl_desc = {
>> {},
>> },
>> .info = &skl_display,
>> + STEP_INFO(kbl_steppings),
>> };
>>
>> static const u16 cfl_ult_ids[] = {
>> @@ -706,6 +737,13 @@ static const struct platform_desc cml_desc = {
>> BIT(TRANSCODER_DSI_A) | BIT(TRANSCODER_DSI_C), \
>> .__runtime_defaults.port_mask = BIT(PORT_A) | BIT(PORT_B) | BIT(PORT_C)
>>
>> +static const enum intel_step bxt_steppings[] = {
>> + [0xA] = STEP_C0,
>> + [0xB] = STEP_C0,
>> + [0xC] = STEP_D0,
>> + [0xD] = STEP_E0,
>> +};
>> +
>> static const struct platform_desc bxt_desc = {
>> PLATFORM(BROXTON),
>> .info = &(const struct intel_display_device_info) {
>> @@ -714,6 +752,11 @@ static const struct platform_desc bxt_desc = {
>>
>> .__runtime_defaults.ip.ver = 9,
>> },
>> + STEP_INFO(bxt_steppings),
>> +};
>> +
>> +static const enum intel_step glk_steppings[] = {
>> + [3] = STEP_B0,
>> };
>>
>> static const struct platform_desc glk_desc = {
>> @@ -725,6 +768,7 @@ static const struct platform_desc glk_desc = {
>>
>> .__runtime_defaults.ip.ver = 10,
>> },
>> + STEP_INFO(glk_steppings),
>> };
>>
>> #define ICL_DISPLAY \
>> @@ -773,6 +817,10 @@ static const u16 icl_port_f_ids[] = {
>> 0
>> };
>>
>> +static const enum intel_step icl_steppings[] = {
>> + [7] = STEP_D0,
>> +};
>> +
>> static const struct platform_desc icl_desc = {
>> PLATFORM(ICELAKE),
>> .subplatforms = (const struct subplatform_desc[]) {
>> @@ -784,6 +832,7 @@ static const struct platform_desc icl_desc = {
>>
>> .__runtime_defaults.port_mask = BIT(PORT_A) | BIT(PORT_B) | BIT(PORT_C) | BIT(PORT_D) | BIT(PORT_E),
>> },
>> + STEP_INFO(icl_steppings),
>> };
>>
>> static const struct intel_display_device_info jsl_ehl_display = {
>> @@ -792,14 +841,21 @@ static const struct intel_display_device_info jsl_ehl_display = {
>> .__runtime_defaults.port_mask = BIT(PORT_A) | BIT(PORT_B) | BIT(PORT_C) | BIT(PORT_D),
>> };
>>
>> +static const enum intel_step jsl_ehl_steppings[] = {
>> + [0] = STEP_A0,
>> + [1] = STEP_B0,
>> +};
>> +
>> static const struct platform_desc jsl_desc = {
>> PLATFORM(JASPERLAKE),
>> .info = &jsl_ehl_display,
>> + STEP_INFO(jsl_ehl_steppings),
>> };
>>
>> static const struct platform_desc ehl_desc = {
>> PLATFORM(ELKHARTLAKE),
>> .info = &jsl_ehl_display,
>> + STEP_INFO(jsl_ehl_steppings),
>> };
>>
>> #define XE_D_DISPLAY \
>> @@ -850,10 +906,23 @@ static const u16 tgl_uy_ids[] = {
>> 0
>> };
>>
>> +static const enum intel_step tgl_steppings[] = {
>> + [0] = STEP_B0,
>> + [1] = STEP_D0,
>> +};
>> +
>> +static const enum intel_step tgl_uy_steppings[] = {
>> + [0] = STEP_A0,
>> + [1] = STEP_C0,
>> + [2] = STEP_C0,
>> + [3] = STEP_D0,
>> +};
>> +
>> static const struct platform_desc tgl_desc = {
>> PLATFORM(TIGERLAKE),
>> .subplatforms = (const struct subplatform_desc[]) {
>> - { INTEL_DISPLAY_TIGERLAKE_UY, "UY", tgl_uy_ids },
>> + { INTEL_DISPLAY_TIGERLAKE_UY, "UY", tgl_uy_ids,
>> + STEP_INFO(tgl_uy_steppings) },
>> {},
>> },
>> .info = &(const struct intel_display_device_info) {
>> @@ -866,6 +935,12 @@ static const struct platform_desc tgl_desc = {
>> .__runtime_defaults.port_mask = BIT(PORT_A) | BIT(PORT_B) |
>> BIT(PORT_TC1) | BIT(PORT_TC2) | BIT(PORT_TC3) | BIT(PORT_TC4) | BIT(PORT_TC5) | BIT(PORT_TC6),
>> },
>> + STEP_INFO(tgl_steppings),
>> +};
>> +
>> +static const enum intel_step dg1_steppings[] = {
>> + [0] = STEP_A0,
>> + [1] = STEP_B0,
>> };
>>
>> static const struct platform_desc dg1_desc = {
>> @@ -876,6 +951,13 @@ static const struct platform_desc dg1_desc = {
>> .__runtime_defaults.port_mask = BIT(PORT_A) | BIT(PORT_B) |
>> BIT(PORT_TC1) | BIT(PORT_TC2),
>> },
>> + STEP_INFO(dg1_steppings),
>> +};
>> +
>> +static const enum intel_step rkl_steppings[] = {
>> + [0] = STEP_A0,
>> + [1] = STEP_B0,
>> + [4] = STEP_C0,
>> };
>>
>> static const struct platform_desc rkl_desc = {
>> @@ -892,6 +974,7 @@ static const struct platform_desc rkl_desc = {
>> .__runtime_defaults.port_mask = BIT(PORT_A) | BIT(PORT_B) |
>> BIT(PORT_TC1) | BIT(PORT_TC2),
>> },
>> + STEP_INFO(rkl_steppings),
>> };
>>
>> static const u16 adls_rpls_ids[] = {
>> @@ -899,10 +982,24 @@ static const u16 adls_rpls_ids[] = {
>> 0
>> };
>>
>> +static const enum intel_step adl_s_steppings[] = {
>> + [0x0] = STEP_A0,
>> + [0x1] = STEP_A2,
>> + [0x4] = STEP_B0,
>> + [0x8] = STEP_B0,
>> + [0xC] = STEP_C0,
>> +};
>> +
>> +static const enum intel_step adl_s_rpl_s_steppings[] = {
>> + [0x4] = STEP_D0,
>> + [0xC] = STEP_C0,
>> +};
>> +
>> static const struct platform_desc adl_s_desc = {
>> PLATFORM(ALDERLAKE_S),
>> .subplatforms = (const struct subplatform_desc[]) {
>> - { INTEL_DISPLAY_ALDERLAKE_S_RAPTORLAKE_S, "RPL-S", adls_rpls_ids },
>> + { INTEL_DISPLAY_ALDERLAKE_S_RAPTORLAKE_S, "RPL-S", adls_rpls_ids,
>> + STEP_INFO(adl_s_rpl_s_steppings) },
>> {},
>> },
>> .info = &(const struct intel_display_device_info) {
>> @@ -913,6 +1010,7 @@ static const struct platform_desc adl_s_desc = {
>> .__runtime_defaults.port_mask = BIT(PORT_A) |
>> BIT(PORT_TC1) | BIT(PORT_TC2) | BIT(PORT_TC3) | BIT(PORT_TC4),
>> },
>> + STEP_INFO(adl_s_steppings),
>> };
>>
>> #define XE_LPD_FEATURES \
>> @@ -986,15 +1084,34 @@ static const u16 adlp_rplp_ids[] = {
>> 0
>> };
>>
>> +static const enum intel_step adl_p_steppings[] = {
>> + [0x0] = STEP_A0,
>> + [0x4] = STEP_B0,
>> + [0x8] = STEP_C0,
>> + [0xC] = STEP_D0,
>> +};
>> +
>> +static const enum intel_step adl_p_adl_n_steppings[] = {
>> + [0x0] = STEP_D0,
>> +};
>> +
>> +static const enum intel_step adl_p_rpl_pu_steppings[] = {
>> + [0x4] = STEP_E0,
>> +};
>> +
>> static const struct platform_desc adl_p_desc = {
>> PLATFORM(ALDERLAKE_P),
>> .subplatforms = (const struct subplatform_desc[]) {
>> - { INTEL_DISPLAY_ALDERLAKE_P_ALDERLAKE_N, "ADL-N", adlp_adln_ids },
>> - { INTEL_DISPLAY_ALDERLAKE_P_RAPTORLAKE_U, "RPL-U", adlp_rplu_ids },
>> - { INTEL_DISPLAY_ALDERLAKE_P_RAPTORLAKE_P, "RPL-P", adlp_rplp_ids },
>> + { INTEL_DISPLAY_ALDERLAKE_P_ALDERLAKE_N, "ADL-N", adlp_adln_ids,
>> + STEP_INFO(adl_p_adl_n_steppings) },
>> + { INTEL_DISPLAY_ALDERLAKE_P_RAPTORLAKE_P, "RPL-P", adlp_rplp_ids,
>> + STEP_INFO(adl_p_rpl_pu_steppings) },
>> + { INTEL_DISPLAY_ALDERLAKE_P_RAPTORLAKE_U, "RPL-U", adlp_rplu_ids,
>> + STEP_INFO(adl_p_rpl_pu_steppings) },
>> {},
>> },
>> .info = &xe_lpd_display,
>> + STEP_INFO(adl_p_steppings),
>> };
>>
>> static const struct intel_display_device_info xe_hpd_display = {
>> @@ -1023,12 +1140,33 @@ static const u16 dg2_g12_ids[] = {
>> 0
>> };
>>
>> +static const enum intel_step dg2_g10_steppings[] = {
>> + [0x0] = STEP_A0,
>> + [0x1] = STEP_A0,
>> + [0x4] = STEP_B0,
>> + [0x8] = STEP_C0,
>> +};
>> +
>> +static const enum intel_step dg2_g11_steppings[] = {
>> + [0x0] = STEP_B0,
>> + [0x4] = STEP_C0,
>> + [0x5] = STEP_C0,
>> +};
>> +
>> +static const enum intel_step dg2_g12_steppings[] = {
>> + [0x0] = STEP_C0,
>> + [0x1] = STEP_C0,
>> +};
>> +
>> static const struct platform_desc dg2_desc = {
>> PLATFORM(DG2),
>> .subplatforms = (const struct subplatform_desc[]) {
>> - { INTEL_DISPLAY_DG2_G10, "G10", dg2_g10_ids },
>> - { INTEL_DISPLAY_DG2_G11, "G11", dg2_g11_ids },
>> - { INTEL_DISPLAY_DG2_G12, "G12", dg2_g12_ids },
>> + { INTEL_DISPLAY_DG2_G10, "G10", dg2_g10_ids,
>> + STEP_INFO(dg2_g10_steppings) },
>> + { INTEL_DISPLAY_DG2_G11, "G11", dg2_g11_ids,
>> + STEP_INFO(dg2_g11_steppings) },
>> + { INTEL_DISPLAY_DG2_G12, "G12", dg2_g12_ids,
>> + STEP_INFO(dg2_g12_steppings) },
>> {},
>> },
>> .info = &xe_hpd_display,
>> @@ -1261,13 +1399,66 @@ find_subplatform_desc(struct pci_dev *pdev, const struct platform_desc *desc)
>> return NULL;
>> }
>>
>> +static enum intel_step get_pre_gmdid_step(struct intel_display *display,
>> + const struct stepping_desc *main,
>> + const struct stepping_desc *sub)
>> +{
>> + struct pci_dev *pdev = to_pci_dev(display->drm->dev);
>> + const enum intel_step *map = main->map;
>> + int size = main->size;
>> + int revision = pdev->revision;
>> + enum intel_step step;
>> +
>> + /* subplatform stepping info trumps main platform info */
>> + if (sub->map && sub->size) {
>> + map = sub->map;
>> + size = sub->size;
>> + }
>> +
>> + /* not all platforms define steppings, and it's fine */
>> + if (!map || !size)
>> + return STEP_NONE;
>> +
>> + if (revision < size && map[revision] != STEP_NONE) {
>> + step = map[revision];
>> + } else {
>> + drm_warn(display->drm, "Unknown revision 0x%02x\n", revision);
>> +
>> + /*
>> + * If we hit a gap in the revision to step map, use the information
>> + * for the next revision.
>> + *
>> + * This may be wrong in all sorts of ways, especially if the
>> + * steppings in the array are not monotonically increasing, but
>> + * it's better than defaulting to 0.
>> + */
>> + while (revision < size && map[revision] == STEP_NONE)
>> + revision++;
>> +
>> + if (revision < size) {
>> + drm_dbg_kms(display->drm, "Using display stepping for revision 0x%02x\n",
>> + revision);
>> + step = map[revision];
>> + } else {
>> + drm_dbg_kms(display->drm, "Using future display stepping\n");
>> + step = STEP_FUTURE;
>> + }
>> + }
>> +
>> + drm_WARN_ON(display->drm, step == STEP_NONE);
>> +
>> + return step;
>> +}
>> +
>> void intel_display_device_probe(struct drm_i915_private *i915)
>> {
>> + struct intel_display *display = &i915->display;
>> struct pci_dev *pdev = to_pci_dev(i915->drm.dev);
>> const struct intel_display_device_info *info;
>> struct intel_display_ip_ver ip_ver = {};
>> const struct platform_desc *desc;
>> const struct subplatform_desc *subdesc;
>> + enum intel_step step;
>>
>> /* Add drm device backpointer as early as possible. */
>> i915->display.drm = &i915->drm;
>> @@ -1307,13 +1498,24 @@ void intel_display_device_probe(struct drm_i915_private *i915)
>> DISPLAY_RUNTIME_INFO(i915)->subplatform = subdesc->subplatform;
>> }
>>
>> - if (ip_ver.ver || ip_ver.rel || ip_ver.step)
>> + if (ip_ver.ver || ip_ver.rel || ip_ver.step) {
>> DISPLAY_RUNTIME_INFO(i915)->ip = ip_ver;
>> + step = STEP_A0 + ip_ver.step;
>> + if (step > STEP_FUTURE) {
>> + drm_dbg_kms(display->drm, "Using future display stepping\n");
>> + step = STEP_FUTURE;
>> + }
>> + } else {
>> + step = get_pre_gmdid_step(display, &desc->step_info, &subdesc->step_info);
>
> Can't subdesc still be NULL here? And if we change this to something
> like "subdesc ? &subdesc->step_info : NULL" then we'll also need a
> nullcheck inside get_pre_gmdid_step as well to prevent a npd.
Indeed, good catch! And CI appears to have caught it too.
Thanks,
Jani.
>
>
> Matt
>
>> + }
>> +
>> + DISPLAY_RUNTIME_INFO(i915)->step = step;
>>
>> - drm_info(&i915->drm, "Found %s%s%s (device ID %04x) display version %u.%02u\n",
>> + drm_info(&i915->drm, "Found %s%s%s (device ID %04x) display version %u.%02u stepping %s\n",
>> desc->name, subdesc ? "/" : "", subdesc ? subdesc->name : "",
>> pdev->device, DISPLAY_RUNTIME_INFO(i915)->ip.ver,
>> - DISPLAY_RUNTIME_INFO(i915)->ip.rel);
>> + DISPLAY_RUNTIME_INFO(i915)->ip.rel,
>> + step != STEP_NONE ? intel_step_name(step) : "N/A");
>>
>> return;
>>
>> diff --git a/drivers/gpu/drm/i915/display/intel_display_device.h b/drivers/gpu/drm/i915/display/intel_display_device.h
>> index 8bd342658291..1c75cbd68dea 100644
>> --- a/drivers/gpu/drm/i915/display/intel_display_device.h
>> +++ b/drivers/gpu/drm/i915/display/intel_display_device.h
>> @@ -201,8 +201,9 @@ struct intel_display_runtime_info {
>> struct intel_display_ip_ver {
>> u16 ver;
>> u16 rel;
>> - u16 step;
>> + u16 step; /* hardware */
>> } ip;
>> + int step; /* symbolic */
>>
>> u8 pipe_mask;
>> u8 cpu_transcoder_mask;
>> diff --git a/drivers/gpu/drm/xe/compat-i915-headers/intel_step.h b/drivers/gpu/drm/xe/compat-i915-headers/intel_step.h
>> index ee3f45b668b9..2cf13a572ab0 100644
>> --- a/drivers/gpu/drm/xe/compat-i915-headers/intel_step.h
>> +++ b/drivers/gpu/drm/xe/compat-i915-headers/intel_step.h
>> @@ -8,6 +8,7 @@
>>
>> #include "xe_step.h"
>>
>> +#define intel_step xe_step
>> #define intel_step_name xe_step_name
>>
>> #endif /* __INTEL_STEP_H__ */
>> --
>> 2.39.2
>>
--
Jani Nikula, Intel
next prev parent reply other threads:[~2024-08-21 9:00 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-08-20 19:00 [PATCH 00/10] drm/i915/display: identify display steppings in display code Jani Nikula
2024-08-20 19:00 ` [PATCH 01/10] drm/xe/display: fix compat IS_DISPLAY_STEP() range end Jani Nikula
2024-08-20 19:31 ` Lucas De Marchi
2024-08-20 22:29 ` Matt Roper
2024-08-20 19:00 ` [PATCH 02/10] drm/xe/display: remove intel_display_step_name() to simplify Jani Nikula
2024-08-20 22:32 ` Matt Roper
2024-08-20 19:00 ` [PATCH 03/10] drm/xe/display: remove the unused compat HAS_GMD_ID() Jani Nikula
2024-08-20 22:40 ` Matt Roper
2024-08-20 19:00 ` [PATCH 04/10] drm/xe/step: define more steppings E-J Jani Nikula
2024-08-20 22:48 ` Matt Roper
2024-08-20 19:00 ` [PATCH 05/10] drm/i915/display: rename IS_DISPLAY_IP_RANGE() to IS_DISPLAY_VER_FULL() Jani Nikula
2024-08-20 22:54 ` Matt Roper
2024-08-20 19:00 ` [PATCH 06/10] drm/i915/display: rename IS_DISPLAY_IP_STEP() to IS_DISPLAY_VER_STEP() Jani Nikula
2024-08-20 22:56 ` Matt Roper
2024-08-20 19:00 ` [PATCH 07/10] drm/i915/display: identify display steppings in display probe Jani Nikula
2024-08-20 23:52 ` Matt Roper
2024-08-21 8:59 ` Jani Nikula [this message]
2024-08-21 9:50 ` [PATCH v2] " Jani Nikula
2024-08-21 13:48 ` Matt Roper
2024-08-21 13:52 ` Gustavo Sousa
2024-08-21 14:30 ` Jani Nikula
2024-08-20 19:00 ` [PATCH 08/10] drm/i915/display: switch to display detected steppings Jani Nikula
2024-08-21 0:01 ` Matt Roper
2024-08-20 19:00 ` [PATCH 09/10] drm/i915: remove display stepping handling Jani Nikula
2024-08-21 0:04 ` Matt Roper
2024-08-21 0:08 ` Matt Roper
2024-08-20 19:00 ` [PATCH 10/10] drm/xe: " Jani Nikula
2024-08-21 0:04 ` Matt Roper
2024-08-20 19:30 ` ✗ Fi.CI.CHECKPATCH: warning for drm/i915/display: identify display steppings in display code Patchwork
2024-08-20 19:30 ` ✗ Fi.CI.SPARSE: " Patchwork
2024-08-20 19:40 ` ✗ Fi.CI.BAT: failure " Patchwork
2024-08-21 10:38 ` ✗ Fi.CI.CHECKPATCH: warning for drm/i915/display: identify display steppings in display code (rev2) Patchwork
2024-08-21 10:38 ` ✗ Fi.CI.SPARSE: " Patchwork
2024-08-21 10:49 ` ✓ Fi.CI.BAT: success " Patchwork
2024-08-21 12:22 ` ✗ Fi.CI.IGT: failure " Patchwork
2024-08-22 10:52 ` [PATCH 00/10] drm/i915/display: identify display steppings in display code Jani Nikula
2024-08-22 12:32 ` Lucas De Marchi
2024-08-22 13:29 ` Jani Nikula
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