On Mon, 11 Jan 2021, Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx> wrote:
> On Fri, 08 Jan 2021, Matt Roper <matthew.d.roper@xxxxxxxxx> wrote:
>> On Fri, Jan 08, 2021 at 03:18:52PM -0800, Aditya Swarup wrote:
>>> TGL adds another level of indirection for applying WA based on stepping
>>> information rather than PCI REVID. So change TGL_REVID enum into
>>> stepping enum and use PCI REVID as index into revid to stepping table to
>>> fetch correct display and GT stepping for application of WAs as
>>> suggested by Matt Roper.
>>
>> So to clarify the goal is to rename "revid" -> "stepping" because the
>> values like "A1," "C0," etc. are't the actual PCI revision ID, but
>> rather descriptions of the stepping of a given IP block; the enum values
>> we use to represent those are arbitrary and don't matter as long as
>> they're monotonically increasing for comparisons. The PCI revision ID
>> is just the input we use today to deduce what the IP steppings are, and
>> there's talk that we could determine the IP steppings in a different way
>> at some point in the future.
>>
>> Furthermore, since the same scheme will be used at least for ADL-S, we
>> should drop the "TGL" prefix since there's no need to name these general
>> enum values in a platform-specific manner.
>>
>> Reviewed-by: Matt Roper <matthew.d.roper@xxxxxxxxx>
>>
>> We should probably make the same kind of change to KBL (and use the same
>> stepping enum) too since it has the same kind of extra indirection as
>> TGL/ADL-S, but we can do that as a followup patch.
>
> FWIW I have a wip series changing the whole thing to abstract steppings
> enums that are shared between platforms, but it's in a bit of limbo
> because the previous revid changes were applied to drm-intel-gt-next,
> and it's fallen pretty far out of sync with drm-intel-next. All of this
> really belongs to drm-intel-next, but can't do that until the branches
> sync up again.
Btw this series doesn't apply to drm-intel-next either, for the same
reason, and the ADL-S platform definition and PCI IDs must *not* be
applied to drm-intel-gt-next.
BR,
Jani.
>
> My series also completely hides the arrays into a separate .c file,
> because the externs with direct array access are turning into
> nightmare. The ARRAY_SIZE() checks rely on the extern declaration and
> the actual array definition to have the sizes in sync, but the compiler
> does not check that. Really.
>
> IDK, feels like this merging this series is going to be extra churn.
>
>
> BR,
> Jani.
>
>
>>
>>
>> Matt
>>
>>>
>>> Cc: Matt Roper <matthew.d.roper@xxxxxxxxx>
>>> Cc: Lucas De Marchi <lucas.demarchi@xxxxxxxxx>
>>> Cc: José Roberto de Souza <jose.souza@xxxxxxxxx>
>>> Signed-off-by: Aditya Swarup <aditya.swarup@xxxxxxxxx>
>>> ---
>>> .../drm/i915/display/intel_display_power.c | 2 +-
>>> drivers/gpu/drm/i915/display/intel_psr.c | 4 +-
>>> drivers/gpu/drm/i915/display/intel_sprite.c | 2 +-
>>> drivers/gpu/drm/i915/gt/intel_workarounds.c | 26 +++++-----
>>> drivers/gpu/drm/i915/i915_drv.h | 50 +++++++++----------
>>> drivers/gpu/drm/i915/intel_pm.c | 2 +-
>>> 6 files changed, 43 insertions(+), 43 deletions(-)
>>>
>>> diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c b/drivers/gpu/drm/i915/display/intel_display_power.c
>>> index d52374f01316..bb04b502a442 100644
>>> --- a/drivers/gpu/drm/i915/display/intel_display_power.c
>>> +++ b/drivers/gpu/drm/i915/display/intel_display_power.c
>>> @@ -5340,7 +5340,7 @@ static void tgl_bw_buddy_init(struct drm_i915_private *dev_priv)
>>> int config, i;
>>>
>>> if (IS_DG1_REVID(dev_priv, DG1_REVID_A0, DG1_REVID_A0) ||
>>> - IS_TGL_DISP_REVID(dev_priv, TGL_REVID_A0, TGL_REVID_B0))
>>> + IS_TGL_DISP_STEPPING(dev_priv, STEP_A0, STEP_B0))
>>> /* Wa_1409767108:tgl,dg1 */
>>> table = wa_1409767108_buddy_page_masks;
>>> else
>>> diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
>>> index c24ae69426cf..a93717178957 100644
>>> --- a/drivers/gpu/drm/i915/display/intel_psr.c
>>> +++ b/drivers/gpu/drm/i915/display/intel_psr.c
>>> @@ -550,7 +550,7 @@ static void hsw_activate_psr2(struct intel_dp *intel_dp)
>>>
>>> if (dev_priv->psr.psr2_sel_fetch_enabled) {
>>> /* WA 1408330847 */
>>> - if (IS_TGL_DISP_REVID(dev_priv, TGL_REVID_A0, TGL_REVID_A0) ||
>>> + if (IS_TGL_DISP_STEPPING(dev_priv, STEP_A0, STEP_A0) ||
>>> IS_RKL_REVID(dev_priv, RKL_REVID_A0, RKL_REVID_A0))
>>> intel_de_rmw(dev_priv, CHICKEN_PAR1_1,
>>> DIS_RAM_BYPASS_PSR2_MAN_TRACK,
>>> @@ -1102,7 +1102,7 @@ static void intel_psr_disable_locked(struct intel_dp *intel_dp)
>>>
>>> /* WA 1408330847 */
>>> if (dev_priv->psr.psr2_sel_fetch_enabled &&
>>> - (IS_TGL_DISP_REVID(dev_priv, TGL_REVID_A0, TGL_REVID_A0) ||
>>> + (IS_TGL_DISP_STEPPING(dev_priv, STEP_A0, STEP_A0) ||
>>> IS_RKL_REVID(dev_priv, RKL_REVID_A0, RKL_REVID_A0)))
>>> intel_de_rmw(dev_priv, CHICKEN_PAR1_1,
>>> DIS_RAM_BYPASS_PSR2_MAN_TRACK, 0);
>>> diff --git a/drivers/gpu/drm/i915/display/intel_sprite.c b/drivers/gpu/drm/i915/display/intel_sprite.c
>>> index cf3589fd0ddb..4ce32df3855f 100644
>>> --- a/drivers/gpu/drm/i915/display/intel_sprite.c
>>> +++ b/drivers/gpu/drm/i915/display/intel_sprite.c
>>> @@ -3033,7 +3033,7 @@ static bool gen12_plane_supports_mc_ccs(struct drm_i915_private *dev_priv,
>>> {
>>> /* Wa_14010477008:tgl[a0..c0],rkl[all],dg1[all] */
>>> if (IS_DG1(dev_priv) || IS_ROCKETLAKE(dev_priv) ||
>>> - IS_TGL_DISP_REVID(dev_priv, TGL_REVID_A0, TGL_REVID_C0))
>>> + IS_TGL_DISP_STEPPING(dev_priv, STEP_A0, STEP_C0))
>>> return false;
>>>
>>> return plane_id < PLANE_SPRITE4;
>>> diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c
>>> index c21a9726326a..111d01e2f81e 100644
>>> --- a/drivers/gpu/drm/i915/gt/intel_workarounds.c
>>> +++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c
>>> @@ -71,17 +71,17 @@ const struct i915_rev_steppings kbl_revids[] = {
>>> [7] = { .gt_stepping = KBL_REVID_G0, .disp_stepping = KBL_REVID_C0 },
>>> };
>>>
>>> -const struct i915_rev_steppings tgl_uy_revids[] = {
>>> - [0] = { .gt_stepping = TGL_REVID_A0, .disp_stepping = TGL_REVID_A0 },
>>> - [1] = { .gt_stepping = TGL_REVID_B0, .disp_stepping = TGL_REVID_C0 },
>>> - [2] = { .gt_stepping = TGL_REVID_B1, .disp_stepping = TGL_REVID_C0 },
>>> - [3] = { .gt_stepping = TGL_REVID_C0, .disp_stepping = TGL_REVID_D0 },
>>> +const struct i915_rev_steppings tgl_uy_revid_step_tbl[] = {
>>> + [0] = { .gt_stepping = STEP_A0, .disp_stepping = STEP_A0 },
>>> + [1] = { .gt_stepping = STEP_B0, .disp_stepping = STEP_C0 },
>>> + [2] = { .gt_stepping = STEP_B1, .disp_stepping = STEP_C0 },
>>> + [3] = { .gt_stepping = STEP_C0, .disp_stepping = STEP_D0 },
>>> };
>>>
>>> /* Same GT stepping between tgl_uy_revids and tgl_revids don't mean the same HW */
>>> -const struct i915_rev_steppings tgl_revids[] = {
>>> - [0] = { .gt_stepping = TGL_REVID_A0, .disp_stepping = TGL_REVID_B0 },
>>> - [1] = { .gt_stepping = TGL_REVID_B0, .disp_stepping = TGL_REVID_D0 },
>>> +const struct i915_rev_steppings tgl_revid_step_tbl[] = {
>>> + [0] = { .gt_stepping = STEP_A0, .disp_stepping = STEP_B0 },
>>> + [1] = { .gt_stepping = STEP_B0, .disp_stepping = STEP_D0 },
>>> };
>>>
>>> static void wa_init_start(struct i915_wa_list *wal, const char *name, const char *engine_name)
>>> @@ -1211,19 +1211,19 @@ tgl_gt_workarounds_init(struct drm_i915_private *i915, struct i915_wa_list *wal)
>>> gen12_gt_workarounds_init(i915, wal);
>>>
>>> /* Wa_1409420604:tgl */
>>> - if (IS_TGL_UY_GT_REVID(i915, TGL_REVID_A0, TGL_REVID_A0))
>>> + if (IS_TGL_UY_GT_STEPPING(i915, STEP_A0, STEP_A0))
>>> wa_write_or(wal,
>>> SUBSLICE_UNIT_LEVEL_CLKGATE2,
>>> CPSSUNIT_CLKGATE_DIS);
>>>
>>> /* Wa_1607087056:tgl also know as BUG:1409180338 */
>>> - if (IS_TGL_UY_GT_REVID(i915, TGL_REVID_A0, TGL_REVID_A0))
>>> + if (IS_TGL_UY_GT_STEPPING(i915, STEP_A0, STEP_A0))
>>> wa_write_or(wal,
>>> SLICE_UNIT_LEVEL_CLKGATE,
>>> L3_CLKGATE_DIS | L3_CR2X_CLKGATE_DIS);
>>>
>>> /* Wa_1408615072:tgl[a0] */
>>> - if (IS_TGL_UY_GT_REVID(i915, TGL_REVID_A0, TGL_REVID_A0))
>>> + if (IS_TGL_UY_GT_STEPPING(i915, STEP_A0, STEP_A0))
>>> wa_write_or(wal, UNSLICE_UNIT_LEVEL_CLKGATE2,
>>> VSUNIT_CLKGATE_DIS_TGL);
>>> }
>>> @@ -1700,7 +1700,7 @@ rcs_engine_wa_init(struct intel_engine_cs *engine, struct i915_wa_list *wal)
>>> struct drm_i915_private *i915 = engine->i915;
>>>
>>> if (IS_DG1_REVID(i915, DG1_REVID_A0, DG1_REVID_A0) ||
>>> - IS_TGL_UY_GT_REVID(i915, TGL_REVID_A0, TGL_REVID_A0)) {
>>> + IS_TGL_UY_GT_STEPPING(i915, STEP_A0, STEP_A0)) {
>>> /*
>>> * Wa_1607138336:tgl[a0],dg1[a0]
>>> * Wa_1607063988:tgl[a0],dg1[a0]
>>> @@ -1710,7 +1710,7 @@ rcs_engine_wa_init(struct intel_engine_cs *engine, struct i915_wa_list *wal)
>>> GEN12_DISABLE_POSH_BUSY_FF_DOP_CG);
>>> }
>>>
>>> - if (IS_TGL_UY_GT_REVID(i915, TGL_REVID_A0, TGL_REVID_A0)) {
>>> + if (IS_TGL_UY_GT_STEPPING(i915, STEP_A0, STEP_A0)) {
>>> /*
>>> * Wa_1606679103:tgl
>>> * (see also Wa_1606682166:icl)
>>> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
>>> index 5e5bcef20e33..11d6e8abde46 100644
>>> --- a/drivers/gpu/drm/i915/i915_drv.h
>>> +++ b/drivers/gpu/drm/i915/i915_drv.h
>>> @@ -1559,54 +1559,54 @@ extern const struct i915_rev_steppings kbl_revids[];
>>> (IS_JSL_EHL(p) && IS_REVID(p, since, until))
>>>
>>> enum {
>>> - TGL_REVID_A0,
>>> - TGL_REVID_B0,
>>> - TGL_REVID_B1,
>>> - TGL_REVID_C0,
>>> - TGL_REVID_D0,
>>> + STEP_A0,
>>> + STEP_B0,
>>> + STEP_B1,
>>> + STEP_C0,
>>> + STEP_D0,
>>> };
>>>
>>> -#define TGL_UY_REVIDS_SIZE 4
>>> -#define TGL_REVIDS_SIZE 2
>>> +#define TGL_UY_REVID_STEP_TBL_SIZE 4
>>> +#define TGL_REVID_STEP_TBL_SIZE 2
>>>
>>> -extern const struct i915_rev_steppings tgl_uy_revids[TGL_UY_REVIDS_SIZE];
>>> -extern const struct i915_rev_steppings tgl_revids[TGL_REVIDS_SIZE];
>>> +extern const struct i915_rev_steppings tgl_uy_revid_step_tbl[TGL_UY_REVID_STEP_TBL_SIZE];
>>> +extern const struct i915_rev_steppings tgl_revid_step_tbl[TGL_REVID_STEP_TBL_SIZE];
>>>
>>> static inline const struct i915_rev_steppings *
>>> -tgl_revids_get(struct drm_i915_private *dev_priv)
>>> +tgl_stepping_get(struct drm_i915_private *dev_priv)
>>> {
>>> u8 revid = INTEL_REVID(dev_priv);
>>> u8 size;
>>> - const struct i915_rev_steppings *tgl_revid_tbl;
>>> + const struct i915_rev_steppings *revid_step_tbl;
>>>
>>> if (IS_TGL_U(dev_priv) || IS_TGL_Y(dev_priv)) {
>>> - tgl_revid_tbl = tgl_uy_revids;
>>> - size = ARRAY_SIZE(tgl_uy_revids);
>>> + revid_step_tbl = tgl_uy_revid_step_tbl;
>>> + size = ARRAY_SIZE(tgl_uy_revid_step_tbl);
>>> } else {
>>> - tgl_revid_tbl = tgl_revids;
>>> - size = ARRAY_SIZE(tgl_revids);
>>> + revid_step_tbl = tgl_revid_step_tbl;
>>> + size = ARRAY_SIZE(tgl_revid_step_tbl);
>>> }
>>>
>>> revid = min_t(u8, revid, size - 1);
>>>
>>> - return &tgl_revid_tbl[revid];
>>> + return &revid_step_tbl[revid];
>>> }
>>>
>>> -#define IS_TGL_DISP_REVID(p, since, until) \
>>> +#define IS_TGL_DISP_STEPPING(p, since, until) \
>>> (IS_TIGERLAKE(p) && \
>>> - tgl_revids_get(p)->disp_stepping >= (since) && \
>>> - tgl_revids_get(p)->disp_stepping <= (until))
>>> + tgl_stepping_get(p)->disp_stepping >= (since) && \
>>> + tgl_stepping_get(p)->disp_stepping <= (until))
>>>
>>> -#define IS_TGL_UY_GT_REVID(p, since, until) \
>>> +#define IS_TGL_UY_GT_STEPPING(p, since, until) \
>>> ((IS_TGL_U(p) || IS_TGL_Y(p)) && \
>>> - tgl_revids_get(p)->gt_stepping >= (since) && \
>>> - tgl_revids_get(p)->gt_stepping <= (until))
>>> + tgl_stepping_get(p)->gt_stepping >= (since) && \
>>> + tgl_stepping_get(p)->gt_stepping <= (until))
>>>
>>> -#define IS_TGL_GT_REVID(p, since, until) \
>>> +#define IS_TGL_GT_STEPPING(p, since, until) \
>>> (IS_TIGERLAKE(p) && \
>>> !(IS_TGL_U(p) || IS_TGL_Y(p)) && \
>>> - tgl_revids_get(p)->gt_stepping >= (since) && \
>>> - tgl_revids_get(p)->gt_stepping <= (until))
>>> + tgl_stepping_get(p)->gt_stepping >= (since) && \
>>> + tgl_stepping_get(p)->gt_stepping <= (until))
>>>
>>> #define RKL_REVID_A0 0x0
>>> #define RKL_REVID_B0 0x1
>>> diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
>>> index bbc73df7f753..319acca2630b 100644
>>> --- a/drivers/gpu/drm/i915/intel_pm.c
>>> +++ b/drivers/gpu/drm/i915/intel_pm.c
>>> @@ -7110,7 +7110,7 @@ static void tgl_init_clock_gating(struct drm_i915_private *dev_priv)
>>> ILK_DPFC_CHICKEN_COMP_DUMMY_PIXEL);
>>>
>>> /* Wa_1409825376:tgl (pre-prod)*/
>>> - if (IS_TGL_DISP_REVID(dev_priv, TGL_REVID_A0, TGL_REVID_B1))
>>> + if (IS_TGL_DISP_STEPPING(dev_priv, STEP_A0, STEP_B1))
>>> intel_uncore_write(&dev_priv->uncore, GEN9_CLKGATE_DIS_3, intel_uncore_read(&dev_priv->uncore, GEN9_CLKGATE_DIS_3) |
>>> TGL_VRH_GATING_DIS);
>>>
>>> --
>>> 2.27.0
>>>
--
Jani Nikula, Intel Open Source Graphics Center
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