Re: [Intel-gfx] [PATCH v2 03/12] drm/i915/skl: Use revid->stepping tables
On Fri, Jul 09, 2021 at 08:37:15PM -0700, Matt Roper wrote: Switch SKL to use a revid->stepping table as we're trying to do on all platforms going forward. Also drop the preproduction revisions and add the newer steppings we hadn't already handled. Note that SKL has a case where a newer revision ID corresponds to an older GT/disp stepping (0x9 -> STEP_J0, 0xA -> STEP_I1). Also, the lack of a revision ID 0x8 in the table is intentional and not an oversight. We'll re-write the KBL-specific comment to make it clear that these kind of quirks are expected. v2: - Since GT and display steppings are always identical on SKL use a macro to set both values at once in a more readable manner. (Anusha) - Drop preproduction steppings. Bspec: 13626 Cc: Anusha Srivatsa Signed-off-by: Matt Roper --- drivers/gpu/drm/i915/gt/intel_workarounds.c | 2 +- drivers/gpu/drm/i915/i915_drv.h | 11 +--- drivers/gpu/drm/i915/intel_step.c | 30 + drivers/gpu/drm/i915/intel_step.h | 4 +++ 4 files changed, 31 insertions(+), 16 deletions(-) diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c index d9a5a445ceec..6dfd564e078f 100644 --- a/drivers/gpu/drm/i915/gt/intel_workarounds.c +++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c @@ -883,7 +883,7 @@ skl_gt_workarounds_init(struct drm_i915_private *i915, struct i915_wa_list *wal) GEN8_EU_GAUNIT_CLOCK_GATE_DISABLE); /* WaInPlaceDecompressionHang:skl */ - if (IS_SKL_REVID(i915, SKL_REVID_H0, REVID_FOREVER)) + if (IS_SKL_GT_STEP(i915, STEP_H0, STEP_FOREVER)) wa_write_or(wal, GEN9_GAMT_ECO_REG_RW_IA, GAMT_ECO_ENABLE_IN_PLACE_DECOMPRESS); diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index c4747f4407ef..f30499ed6787 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -1515,16 +1515,7 @@ IS_SUBPLATFORM(const struct drm_i915_private *i915, #define IS_TGL_Y(dev_priv) \ IS_SUBPLATFORM(dev_priv, INTEL_TIGERLAKE, INTEL_SUBPLATFORM_ULX) -#define SKL_REVID_A0 0x0 -#define SKL_REVID_B0 0x1 -#define SKL_REVID_C0 0x2 -#define SKL_REVID_D0 0x3 -#define SKL_REVID_E0 0x4 -#define SKL_REVID_F0 0x5 -#define SKL_REVID_G0 0x6 -#define SKL_REVID_H0 0x7 - -#define IS_SKL_REVID(p, since, until) (IS_SKYLAKE(p) && IS_REVID(p, since, until)) +#define IS_SKL_GT_STEP(p, since, until) (IS_SKYLAKE(p) && IS_GT_STEP(p, since, until)) #define BXT_REVID_A00x0 #define BXT_REVID_A10x1 diff --git a/drivers/gpu/drm/i915/intel_step.c b/drivers/gpu/drm/i915/intel_step.c index 93ccd42f2514..69c928b046e8 100644 --- a/drivers/gpu/drm/i915/intel_step.c +++ b/drivers/gpu/drm/i915/intel_step.c @@ -7,14 +7,31 @@ #include "intel_step.h" /* - * KBL revision ID ordering is bizarre; higher revision ID's map to lower - * steppings in some cases. So rather than test against the revision ID - * directly, let's map that into our own range of increasing ID's that we - * can test against in a regular manner. + * Some platforms have unusual ways of mapping PCI revision ID to GT/display + * steppings. E.g., in some cases a higher PCI revision may translate to a + * lower stepping of the GT and/or display IP. This file provides lookup + * tables to map the PCI revision into a standard set of stepping values that + * can be compared numerically. + * + * Also note that some revisions/steppings may have been set aside as + * placeholders but never materialized in real hardware; in those cases there + * may be jumps in the revision IDs or stepping values in the tables below. */ +/* + * Some platforms always have the same stepping value for GT and display; + * use a macro to define these to make it easier to identify the platforms + * where the two steppings can deviate. + */ +#define COMMON_STEPPING(x) .gt_step = STEP_##x, .display_step = STEP_##x nitpick: "stepping" is the proper word, but we settled on "step" everyhere: functions, macros, tables, filename etc. Can we continue doing that? For the comments I think it's ok to continue using the proper word, but for real code I think it would be better to keep it consistent thanks Lucas De Marchi ___ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx
Re: [Intel-gfx] [PATCH v2 03/12] drm/i915/skl: Use revid->stepping tables
> -Original Message- > From: Roper, Matthew D > Sent: Friday, July 9, 2021 8:37 PM > To: intel-gfx@lists.freedesktop.org > Cc: Srivatsa, Anusha ; Roper, Matthew D > > Subject: [PATCH v2 03/12] drm/i915/skl: Use revid->stepping tables > > Switch SKL to use a revid->stepping table as we're trying to do on all > platforms going forward. Also drop the preproduction revisions and add the > newer steppings we hadn't already handled. > > Note that SKL has a case where a newer revision ID corresponds to an older > GT/disp stepping (0x9 -> STEP_J0, 0xA -> STEP_I1). Also, the lack of a > revision > ID 0x8 in the table is intentional and not an oversight. > We'll re-write the KBL-specific comment to make it clear that these kind of > quirks are expected. > > v2: > - Since GT and display steppings are always identical on SKL use a >macro to set both values at once in a more readable manner. (Anusha) > - Drop preproduction steppings. > > Bspec: 13626 > Cc: Anusha Srivatsa > Signed-off-by: Matt Roper Reviewed-by: Anusha Srivatsa > --- > drivers/gpu/drm/i915/gt/intel_workarounds.c | 2 +- > drivers/gpu/drm/i915/i915_drv.h | 11 +--- > drivers/gpu/drm/i915/intel_step.c | 30 + > drivers/gpu/drm/i915/intel_step.h | 4 +++ > 4 files changed, 31 insertions(+), 16 deletions(-) > > diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c > b/drivers/gpu/drm/i915/gt/intel_workarounds.c > index d9a5a445ceec..6dfd564e078f 100644 > --- a/drivers/gpu/drm/i915/gt/intel_workarounds.c > +++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c > @@ -883,7 +883,7 @@ skl_gt_workarounds_init(struct drm_i915_private > *i915, struct i915_wa_list *wal) > GEN8_EU_GAUNIT_CLOCK_GATE_DISABLE); > > /* WaInPlaceDecompressionHang:skl */ > - if (IS_SKL_REVID(i915, SKL_REVID_H0, REVID_FOREVER)) > + if (IS_SKL_GT_STEP(i915, STEP_H0, STEP_FOREVER)) > wa_write_or(wal, > GEN9_GAMT_ECO_REG_RW_IA, > GAMT_ECO_ENABLE_IN_PLACE_DECOMPRESS); > diff --git a/drivers/gpu/drm/i915/i915_drv.h > b/drivers/gpu/drm/i915/i915_drv.h index c4747f4407ef..f30499ed6787 > 100644 > --- a/drivers/gpu/drm/i915/i915_drv.h > +++ b/drivers/gpu/drm/i915/i915_drv.h > @@ -1515,16 +1515,7 @@ IS_SUBPLATFORM(const struct drm_i915_private > *i915, #define IS_TGL_Y(dev_priv) \ > IS_SUBPLATFORM(dev_priv, INTEL_TIGERLAKE, > INTEL_SUBPLATFORM_ULX) > > -#define SKL_REVID_A0 0x0 > -#define SKL_REVID_B0 0x1 > -#define SKL_REVID_C0 0x2 > -#define SKL_REVID_D0 0x3 > -#define SKL_REVID_E0 0x4 > -#define SKL_REVID_F0 0x5 > -#define SKL_REVID_G0 0x6 > -#define SKL_REVID_H0 0x7 > - > -#define IS_SKL_REVID(p, since, until) (IS_SKYLAKE(p) && IS_REVID(p, since, > until)) > +#define IS_SKL_GT_STEP(p, since, until) (IS_SKYLAKE(p) && IS_GT_STEP(p, > +since, until)) > > #define BXT_REVID_A0 0x0 > #define BXT_REVID_A1 0x1 > diff --git a/drivers/gpu/drm/i915/intel_step.c > b/drivers/gpu/drm/i915/intel_step.c > index 93ccd42f2514..69c928b046e8 100644 > --- a/drivers/gpu/drm/i915/intel_step.c > +++ b/drivers/gpu/drm/i915/intel_step.c > @@ -7,14 +7,31 @@ > #include "intel_step.h" > > /* > - * KBL revision ID ordering is bizarre; higher revision ID's map to lower > - * steppings in some cases. So rather than test against the revision ID > - * directly, let's map that into our own range of increasing ID's that we > - * can test against in a regular manner. > + * Some platforms have unusual ways of mapping PCI revision ID to > + GT/display > + * steppings. E.g., in some cases a higher PCI revision may translate > + to a > + * lower stepping of the GT and/or display IP. This file provides > + lookup > + * tables to map the PCI revision into a standard set of stepping > + values that > + * can be compared numerically. > + * > + * Also note that some revisions/steppings may have been set aside as > + * placeholders but never materialized in real hardware; in those cases > + there > + * may be jumps in the revision IDs or stepping values in the tables below. > */ > > +/* > + * Some platforms always have the same stepping value for GT and > +display; > + * use a macro to define these to make it easier to identify the > +platforms > + * where the two steppings can deviate. > + */ > +#define COMMON_STEPPING(x) .gt_step = STEP_##x, .display_step = > +STEP_##x > + > +static const struct intel_step_info skl_revids[] = { > + [0x6] = { COMMON_STEPPING(G0) }, > + [0x7] = { COMMON_STEPPING(H0) }, > + [0x9] = { COMMON_STEPPING(J0) }, > + [0xA] = { COMMON_STEPPING(I1) }, > +}; > > -/* FIXME: what about REVID_E0 */ > static const struct intel_step_info kbl_revids[] = { > [0] = { .gt_step = STEP_A0, .display_step = STEP_A0 }, > [1] = { .gt_step = STEP_B0, .display_step = STEP_B0 }, @@ -76,6 +93,9 > @@ void intel_step_init(st
[Intel-gfx] [PATCH v2 03/12] drm/i915/skl: Use revid->stepping tables
Switch SKL to use a revid->stepping table as we're trying to do on all platforms going forward. Also drop the preproduction revisions and add the newer steppings we hadn't already handled. Note that SKL has a case where a newer revision ID corresponds to an older GT/disp stepping (0x9 -> STEP_J0, 0xA -> STEP_I1). Also, the lack of a revision ID 0x8 in the table is intentional and not an oversight. We'll re-write the KBL-specific comment to make it clear that these kind of quirks are expected. v2: - Since GT and display steppings are always identical on SKL use a macro to set both values at once in a more readable manner. (Anusha) - Drop preproduction steppings. Bspec: 13626 Cc: Anusha Srivatsa Signed-off-by: Matt Roper --- drivers/gpu/drm/i915/gt/intel_workarounds.c | 2 +- drivers/gpu/drm/i915/i915_drv.h | 11 +--- drivers/gpu/drm/i915/intel_step.c | 30 + drivers/gpu/drm/i915/intel_step.h | 4 +++ 4 files changed, 31 insertions(+), 16 deletions(-) diff --git a/drivers/gpu/drm/i915/gt/intel_workarounds.c b/drivers/gpu/drm/i915/gt/intel_workarounds.c index d9a5a445ceec..6dfd564e078f 100644 --- a/drivers/gpu/drm/i915/gt/intel_workarounds.c +++ b/drivers/gpu/drm/i915/gt/intel_workarounds.c @@ -883,7 +883,7 @@ skl_gt_workarounds_init(struct drm_i915_private *i915, struct i915_wa_list *wal) GEN8_EU_GAUNIT_CLOCK_GATE_DISABLE); /* WaInPlaceDecompressionHang:skl */ - if (IS_SKL_REVID(i915, SKL_REVID_H0, REVID_FOREVER)) + if (IS_SKL_GT_STEP(i915, STEP_H0, STEP_FOREVER)) wa_write_or(wal, GEN9_GAMT_ECO_REG_RW_IA, GAMT_ECO_ENABLE_IN_PLACE_DECOMPRESS); diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index c4747f4407ef..f30499ed6787 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -1515,16 +1515,7 @@ IS_SUBPLATFORM(const struct drm_i915_private *i915, #define IS_TGL_Y(dev_priv) \ IS_SUBPLATFORM(dev_priv, INTEL_TIGERLAKE, INTEL_SUBPLATFORM_ULX) -#define SKL_REVID_A0 0x0 -#define SKL_REVID_B0 0x1 -#define SKL_REVID_C0 0x2 -#define SKL_REVID_D0 0x3 -#define SKL_REVID_E0 0x4 -#define SKL_REVID_F0 0x5 -#define SKL_REVID_G0 0x6 -#define SKL_REVID_H0 0x7 - -#define IS_SKL_REVID(p, since, until) (IS_SKYLAKE(p) && IS_REVID(p, since, until)) +#define IS_SKL_GT_STEP(p, since, until) (IS_SKYLAKE(p) && IS_GT_STEP(p, since, until)) #define BXT_REVID_A0 0x0 #define BXT_REVID_A1 0x1 diff --git a/drivers/gpu/drm/i915/intel_step.c b/drivers/gpu/drm/i915/intel_step.c index 93ccd42f2514..69c928b046e8 100644 --- a/drivers/gpu/drm/i915/intel_step.c +++ b/drivers/gpu/drm/i915/intel_step.c @@ -7,14 +7,31 @@ #include "intel_step.h" /* - * KBL revision ID ordering is bizarre; higher revision ID's map to lower - * steppings in some cases. So rather than test against the revision ID - * directly, let's map that into our own range of increasing ID's that we - * can test against in a regular manner. + * Some platforms have unusual ways of mapping PCI revision ID to GT/display + * steppings. E.g., in some cases a higher PCI revision may translate to a + * lower stepping of the GT and/or display IP. This file provides lookup + * tables to map the PCI revision into a standard set of stepping values that + * can be compared numerically. + * + * Also note that some revisions/steppings may have been set aside as + * placeholders but never materialized in real hardware; in those cases there + * may be jumps in the revision IDs or stepping values in the tables below. */ +/* + * Some platforms always have the same stepping value for GT and display; + * use a macro to define these to make it easier to identify the platforms + * where the two steppings can deviate. + */ +#define COMMON_STEPPING(x) .gt_step = STEP_##x, .display_step = STEP_##x + +static const struct intel_step_info skl_revids[] = { + [0x6] = { COMMON_STEPPING(G0) }, + [0x7] = { COMMON_STEPPING(H0) }, + [0x9] = { COMMON_STEPPING(J0) }, + [0xA] = { COMMON_STEPPING(I1) }, +}; -/* FIXME: what about REVID_E0 */ static const struct intel_step_info kbl_revids[] = { [0] = { .gt_step = STEP_A0, .display_step = STEP_A0 }, [1] = { .gt_step = STEP_B0, .display_step = STEP_B0 }, @@ -76,6 +93,9 @@ void intel_step_init(struct drm_i915_private *i915) } else if (IS_KABYLAKE(i915)) { revids = kbl_revids; size = ARRAY_SIZE(kbl_revids); + } else if (IS_SKYLAKE(i915)) { + revids = skl_revids; + size = ARRAY_SIZE(skl_revids); } /* Not using the stepping scheme for the platform yet. */ diff --git a/drivers/gpu/drm/i915/intel_step.h b/drivers/gpu/drm/i915/intel_step.h index 958a8bb5d677..88a77159703e 100