| Message ID | 20180820125029.5366-1-alexandru-cosmin.gheorghe@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | drm/malidp: Enable MMU prefetch on Mali-DP650 | expand |
On Mon, Aug 20, 2018 at 01:50:29PM +0100, Alexandru Gheorghe wrote: > From: Jamie Fox <jamie.fox@arm.com> > > Mali-DP650 supports warming up the SMMU translations, by sending > requsts to the SMMU before a buffer is read. > > There are two modes supported: > > - PARTIAL: could be enabled when the buffer is composed of 4K or 64K > pages, the display hardware will send a configurable number of > requests before the actual reading. > > - FULL: could be enabled when the buffer is composed of 1M or 2M > pages, the display hardware will send requests before reading for > all pages composing the buffer. > > This patch adds a mechanism for detecting the page size and set the > MMU prefetch mode if possible. > > Signed-off-by: Jamie Fox <jamie.fox@arm.com> > Signed-off-by: Alexandru Gheorghe <alexandru-cosmin.gheorghe@arm.com> Acked-by: Liviu Dudau <liviu.dudau@arm.com> > --- > drivers/gpu/drm/arm/malidp_drv.h | 9 ++ > drivers/gpu/drm/arm/malidp_hw.c | 17 +- > drivers/gpu/drm/arm/malidp_hw.h | 1 + > drivers/gpu/drm/arm/malidp_planes.c | 233 ++++++++++++++++++++++++++++ > drivers/gpu/drm/arm/malidp_regs.h | 11 ++ > 5 files changed, 269 insertions(+), 2 deletions(-) > > diff --git a/drivers/gpu/drm/arm/malidp_drv.h b/drivers/gpu/drm/arm/malidp_drv.h > index e3eb0cb1f385..2d824558216f 100644 > --- a/drivers/gpu/drm/arm/malidp_drv.h > +++ b/drivers/gpu/drm/arm/malidp_drv.h > @@ -53,6 +53,13 @@ struct malidp_plane { > struct drm_plane base; > struct malidp_hw_device *hwdev; > const struct malidp_layer *layer; > + > +}; > + > +enum mmu_prefetch_mode { > + MALIDP_PREFETCH_MODE_NONE, > + MALIDP_PREFETCH_MODE_PARTIAL, > + MALIDP_PREFETCH_MODE_FULL, > }; > > struct malidp_plane_state { > @@ -63,6 +70,8 @@ struct malidp_plane_state { > /* internal format ID */ > u8 format; > u8 n_planes; > + enum mmu_prefetch_mode mmu_prefetch_mode; > + u32 mmu_prefetch_pgsize; > }; > > #define to_malidp_plane(x) container_of(x, struct malidp_plane, base) > diff --git a/drivers/gpu/drm/arm/malidp_hw.c b/drivers/gpu/drm/arm/malidp_hw.c > index c94a4422e0e9..4233be1c5709 100644 > --- a/drivers/gpu/drm/arm/malidp_hw.c > +++ b/drivers/gpu/drm/arm/malidp_hw.c > @@ -96,6 +96,19 @@ static const struct malidp_layer malidp550_layers[] = { > { DE_SMART, MALIDP550_DE_LS_BASE, MALIDP550_DE_LS_PTR_BASE, MALIDP550_DE_LS_R1_STRIDE, 0 }, > }; > > +static const struct malidp_layer malidp650_layers[] = { > + { DE_VIDEO1, MALIDP550_DE_LV1_BASE, MALIDP550_DE_LV1_PTR_BASE, > + MALIDP_DE_LV_STRIDE0, MALIDP550_LV_YUV2RGB, > + MALIDP650_DE_LV_MMU_CTRL }, > + { DE_GRAPHICS1, MALIDP550_DE_LG_BASE, MALIDP550_DE_LG_PTR_BASE, > + MALIDP_DE_LG_STRIDE, 0, MALIDP650_DE_LG_MMU_CTRL }, > + { DE_VIDEO2, MALIDP550_DE_LV2_BASE, MALIDP550_DE_LV2_PTR_BASE, > + MALIDP_DE_LV_STRIDE0, MALIDP550_LV_YUV2RGB, > + MALIDP650_DE_LV_MMU_CTRL }, > + { DE_SMART, MALIDP550_DE_LS_BASE, MALIDP550_DE_LS_PTR_BASE, > + MALIDP550_DE_LS_R1_STRIDE, 0, MALIDP650_DE_LS_MMU_CTRL }, > +}; > + > #define SE_N_SCALING_COEFFS 96 > static const u16 dp500_se_scaling_coeffs[][SE_N_SCALING_COEFFS] = { > [MALIDP_UPSCALING_COEFFS - 1] = { > @@ -832,8 +845,8 @@ const struct malidp_hw malidp_device[MALIDP_MAX_DEVICES] = { > .dc_base = MALIDP550_DC_BASE, > .out_depth_base = MALIDP550_DE_OUTPUT_DEPTH, > .features = MALIDP_REGMAP_HAS_CLEARIRQ, > - .n_layers = ARRAY_SIZE(malidp550_layers), > - .layers = malidp550_layers, > + .n_layers = ARRAY_SIZE(malidp650_layers), > + .layers = malidp650_layers, > .de_irq_map = { > .irq_mask = MALIDP_DE_IRQ_UNDERRUN | > MALIDP650_DE_IRQ_DRIFT | > diff --git a/drivers/gpu/drm/arm/malidp_hw.h b/drivers/gpu/drm/arm/malidp_hw.h > index ad2e96915d44..39b92a9fb810 100644 > --- a/drivers/gpu/drm/arm/malidp_hw.h > +++ b/drivers/gpu/drm/arm/malidp_hw.h > @@ -62,6 +62,7 @@ struct malidp_layer { > u16 ptr; /* address offset for the pointer register */ > u16 stride_offset; /* offset to the first stride register. */ > s16 yuv2rgb_offset; /* offset to the YUV->RGB matrix entries */ > + u16 mmu_ctrl_offset; /* offset to the MMU control register */ > }; > > enum malidp_scaling_coeff_set { > diff --git a/drivers/gpu/drm/arm/malidp_planes.c b/drivers/gpu/drm/arm/malidp_planes.c > index 29409a65d864..99c487be9a1d 100644 > --- a/drivers/gpu/drm/arm/malidp_planes.c > +++ b/drivers/gpu/drm/arm/malidp_planes.c > @@ -10,11 +10,14 @@ > * ARM Mali DP plane manipulation routines. > */ > > +#include <linux/iommu.h> > + > #include <drm/drmP.h> > #include <drm/drm_atomic.h> > #include <drm/drm_atomic_helper.h> > #include <drm/drm_fb_cma_helper.h> > #include <drm/drm_gem_cma_helper.h> > +#include <drm/drm_gem_framebuffer_helper.h> > #include <drm/drm_plane_helper.h> > #include <drm/drm_print.h> > > @@ -56,6 +59,13 @@ > */ > #define MALIDP_ALPHA_LUT 0xffaa5500 > > +/* page sizes the MMU prefetcher can support */ > +#define MALIDP_MMU_PREFETCH_PARTIAL_PGSIZES (SZ_4K | SZ_64K) > +#define MALIDP_MMU_PREFETCH_FULL_PGSIZES (SZ_1M | SZ_2M) > + > +/* readahead for partial-frame prefetch */ > +#define MALIDP_MMU_PREFETCH_READAHEAD 8 > + > static void malidp_de_plane_destroy(struct drm_plane *plane) > { > struct malidp_plane *mp = to_malidp_plane(plane); > @@ -103,6 +113,9 @@ drm_plane_state *malidp_duplicate_plane_state(struct drm_plane *plane) > state->format = m_state->format; > state->n_planes = m_state->n_planes; > > + state->mmu_prefetch_mode = m_state->mmu_prefetch_mode; > + state->mmu_prefetch_pgsize = m_state->mmu_prefetch_pgsize; > + > return &state->base; > } > > @@ -115,6 +128,12 @@ static void malidp_destroy_plane_state(struct drm_plane *plane, > kfree(m_state); > } > > +static const char * const prefetch_mode_names[] = { > + [MALIDP_PREFETCH_MODE_NONE] = "MMU_PREFETCH_NONE", > + [MALIDP_PREFETCH_MODE_PARTIAL] = "MMU_PREFETCH_PARTIAL", > + [MALIDP_PREFETCH_MODE_FULL] = "MMU_PREFETCH_FULL", > +}; > + > static void malidp_plane_atomic_print_state(struct drm_printer *p, > const struct drm_plane_state *state) > { > @@ -123,6 +142,9 @@ static void malidp_plane_atomic_print_state(struct drm_printer *p, > drm_printf(p, "\trotmem_size=%u\n", ms->rotmem_size); > drm_printf(p, "\tformat_id=%u\n", ms->format); > drm_printf(p, "\tn_planes=%u\n", ms->n_planes); > + drm_printf(p, "\tmmu_prefetch_mode=%s\n", > + prefetch_mode_names[ms->mmu_prefetch_mode]); > + drm_printf(p, "\tmmu_prefetch_pgsize=%d\n", ms->mmu_prefetch_pgsize); > } > > static const struct drm_plane_funcs malidp_de_plane_funcs = { > @@ -176,6 +198,9 @@ static int malidp_se_check_scaling(struct malidp_plane *mp, > return 0; > } > > +static void malidp_de_prefetch_settings(struct malidp_plane *mp, > + struct malidp_plane_state *ms); > + > static int malidp_de_plane_check(struct drm_plane *plane, > struct drm_plane_state *state) > { > @@ -245,6 +270,7 @@ static int malidp_de_plane_check(struct drm_plane *plane, > ms->rotmem_size = val; > } > > + malidp_de_prefetch_settings(mp, ms); > return 0; > } > > @@ -321,6 +347,210 @@ static void malidp_de_set_color_encoding(struct malidp_plane *plane, > } > } > > +static u32 malidp_get_pgsize_bitmap(struct malidp_plane *mp) > +{ > + u32 pgsize_bitmap = 0; > + > + if (iommu_present(&platform_bus_type)) { > + struct iommu_domain *mmu_dom = > + iommu_get_domain_for_dev(mp->base.dev->dev); > + > + if (mmu_dom) > + pgsize_bitmap = mmu_dom->pgsize_bitmap; > + } > + > + return pgsize_bitmap; > +} > + > +/* > + * Check if the framebuffer is entirely made up of pages at least pgsize in > + * size. Only a heuristic: assumes that each scatterlist entry has been aligned > + * to the largest page size smaller than its length and that the MMU maps to > + * the largest page size possible. > + */ > +static bool malidp_check_pages_threshold(struct malidp_plane_state *ms, > + u32 pgsize) > +{ > + int i; > + > + for (i = 0; i < ms->n_planes; i++) { > + struct drm_gem_object *obj; > + struct sg_table *sgt; > + struct scatterlist *sgl; > + > + obj = drm_gem_fb_get_obj(ms->base.fb, i); > + sgt = obj->dev->driver->gem_prime_get_sg_table(obj); > + > + if (!sgt) > + return false; > + > + sgl = sgt->sgl; > + > + while (sgl) { > + if (sgl->length < pgsize) { > + kfree(sgt); > + return false; > + } > + > + sgl = sg_next(sgl); > + } > + > + kfree(sgt); > + } > + > + return true; > +} > + > +/* > + * Check if it is possible to enable partial-frame MMU prefetch given the > + * current format, AFBC state and rotation. > + */ > +static bool malidp_partial_prefetch_supported(u32 format, u64 modifier, > + unsigned int rotation) > +{ > + bool afbc, sparse; > + > + /* rotation and horizontal flip not supported for partial prefetch */ > + if (rotation & (DRM_MODE_ROTATE_90 | DRM_MODE_ROTATE_180 | > + DRM_MODE_ROTATE_270 | DRM_MODE_REFLECT_X)) > + return false; > + > + afbc = modifier & DRM_FORMAT_MOD_ARM_AFBC(0); > + sparse = modifier & AFBC_FORMAT_MOD_SPARSE; > + > + switch (format) { > + case DRM_FORMAT_ARGB2101010: > + case DRM_FORMAT_RGBA1010102: > + case DRM_FORMAT_BGRA1010102: > + case DRM_FORMAT_ARGB8888: > + case DRM_FORMAT_RGBA8888: > + case DRM_FORMAT_BGRA8888: > + case DRM_FORMAT_XRGB8888: > + case DRM_FORMAT_XBGR8888: > + case DRM_FORMAT_RGBX8888: > + case DRM_FORMAT_BGRX8888: > + case DRM_FORMAT_RGB888: > + case DRM_FORMAT_RGBA5551: > + case DRM_FORMAT_RGB565: > + /* always supported */ > + return true; > + > + case DRM_FORMAT_ABGR2101010: > + case DRM_FORMAT_ABGR8888: > + case DRM_FORMAT_ABGR1555: > + case DRM_FORMAT_BGR565: > + /* supported, but if AFBC then must be sparse mode */ > + return (!afbc) || (afbc && sparse); > + > + case DRM_FORMAT_BGR888: > + /* supported, but not for AFBC */ > + return !afbc; > + > + case DRM_FORMAT_YUYV: > + case DRM_FORMAT_UYVY: > + case DRM_FORMAT_NV12: > + case DRM_FORMAT_YUV420: > + /* not supported */ > + return false; > + > + default: > + return false; > + } > +} > + > +/* > + * Select the preferred MMU prefetch mode. Full-frame prefetch is preferred as > + * long as the framebuffer is all large pages. Otherwise partial-frame prefetch > + * is selected as long as it is supported for the current format. The selected > + * page size for prefetch is returned in pgsize_bitmap. > + */ > +static enum mmu_prefetch_mode malidp_mmu_prefetch_select_mode > + (struct malidp_plane_state *ms, u32 *pgsize_bitmap) > +{ > + u32 pgsizes; > + > + /* get the full-frame prefetch page size(s) supported by the MMU */ > + pgsizes = *pgsize_bitmap & MALIDP_MMU_PREFETCH_FULL_PGSIZES; > + > + while (pgsizes) { > + u32 largest_pgsize = 1 << __fls(pgsizes); > + > + if (malidp_check_pages_threshold(ms, largest_pgsize)) { > + *pgsize_bitmap = largest_pgsize; > + return MALIDP_PREFETCH_MODE_FULL; > + } > + > + pgsizes -= largest_pgsize; > + } > + > + /* get the partial-frame prefetch page size(s) supported by the MMU */ > + pgsizes = *pgsize_bitmap & MALIDP_MMU_PREFETCH_PARTIAL_PGSIZES; > + > + if (malidp_partial_prefetch_supported(ms->base.fb->format->format, > + ms->base.fb->modifier, > + ms->base.rotation)) { > + /* partial prefetch using the smallest page size */ > + *pgsize_bitmap = 1 << __ffs(pgsizes); > + return MALIDP_PREFETCH_MODE_PARTIAL; > + } > + *pgsize_bitmap = 0; > + return MALIDP_PREFETCH_MODE_NONE; > +} > + > +static u32 malidp_calc_mmu_control_value(enum mmu_prefetch_mode mode, > + u8 readahead, u8 n_planes, u32 pgsize) > +{ > + u32 mmu_ctrl = 0; > + > + if (mode != MALIDP_PREFETCH_MODE_NONE) { > + mmu_ctrl |= MALIDP_MMU_CTRL_EN; > + > + if (mode == MALIDP_PREFETCH_MODE_PARTIAL) { > + mmu_ctrl |= MALIDP_MMU_CTRL_MODE; > + mmu_ctrl |= MALIDP_MMU_CTRL_PP_NUM_REQ(readahead); > + } > + > + if (pgsize == SZ_64K || pgsize == SZ_2M) { > + int i; > + > + for (i = 0; i < n_planes; i++) > + mmu_ctrl |= MALIDP_MMU_CTRL_PX_PS(i); > + } > + } > + > + return mmu_ctrl; > +} > + > +static void malidp_de_prefetch_settings(struct malidp_plane *mp, > + struct malidp_plane_state *ms) > +{ > + if (!mp->layer->mmu_ctrl_offset) > + return; > + > + /* get the page sizes supported by the MMU */ > + ms->mmu_prefetch_pgsize = malidp_get_pgsize_bitmap(mp); > + ms->mmu_prefetch_mode = > + malidp_mmu_prefetch_select_mode(ms, &ms->mmu_prefetch_pgsize); > +} > + > +static void malidp_de_set_mmu_control(struct malidp_plane *mp, > + struct malidp_plane_state *ms) > +{ > + u32 mmu_ctrl; > + > + /* check hardware supports MMU prefetch */ > + if (!mp->layer->mmu_ctrl_offset) > + return; > + > + mmu_ctrl = malidp_calc_mmu_control_value(ms->mmu_prefetch_mode, > + MALIDP_MMU_PREFETCH_READAHEAD, > + ms->n_planes, > + ms->mmu_prefetch_pgsize); > + > + malidp_hw_write(mp->hwdev, mmu_ctrl, > + mp->layer->base + mp->layer->mmu_ctrl_offset); > +} > + > static void malidp_de_plane_update(struct drm_plane *plane, > struct drm_plane_state *old_state) > { > @@ -351,6 +581,9 @@ static void malidp_de_plane_update(struct drm_plane *plane, > malidp_hw_write(mp->hwdev, lower_32_bits(fb_addr), ptr); > malidp_hw_write(mp->hwdev, upper_32_bits(fb_addr), ptr + 4); > } > + > + malidp_de_set_mmu_control(mp, ms); > + > malidp_de_set_plane_pitches(mp, ms->n_planes, > plane->state->fb->pitches); > > diff --git a/drivers/gpu/drm/arm/malidp_regs.h b/drivers/gpu/drm/arm/malidp_regs.h > index 3579d36b2a71..c60fff4b2aaf 100644 > --- a/drivers/gpu/drm/arm/malidp_regs.h > +++ b/drivers/gpu/drm/arm/malidp_regs.h > @@ -245,6 +245,17 @@ > #define MALIDP550_CONFIG_VALID 0x0c014 > #define MALIDP550_CONFIG_ID 0x0ffd4 > > +/* register offsets specific to DP650 */ > +#define MALIDP650_DE_LV_MMU_CTRL 0x000D0 > +#define MALIDP650_DE_LG_MMU_CTRL 0x00048 > +#define MALIDP650_DE_LS_MMU_CTRL 0x00078 > + > +/* bit masks to set the MMU control register */ > +#define MALIDP_MMU_CTRL_EN (1 << 0) > +#define MALIDP_MMU_CTRL_MODE (1 << 4) > +#define MALIDP_MMU_CTRL_PX_PS(x) (1 << (8 + (x))) > +#define MALIDP_MMU_CTRL_PP_NUM_REQ(x) (((x) & 0x7f) << 12) > + > /* > * Starting with DP550 the register map blocks has been standardised to the > * following layout: > -- > 2.18.0 >
diff --git a/drivers/gpu/drm/arm/malidp_drv.h b/drivers/gpu/drm/arm/malidp_drv.h index e3eb0cb1f385..2d824558216f 100644 --- a/drivers/gpu/drm/arm/malidp_drv.h +++ b/drivers/gpu/drm/arm/malidp_drv.h @@ -53,6 +53,13 @@ struct malidp_plane { struct drm_plane base; struct malidp_hw_device *hwdev; const struct malidp_layer *layer; + +}; + +enum mmu_prefetch_mode { + MALIDP_PREFETCH_MODE_NONE, + MALIDP_PREFETCH_MODE_PARTIAL, + MALIDP_PREFETCH_MODE_FULL, }; struct malidp_plane_state { @@ -63,6 +70,8 @@ struct malidp_plane_state { /* internal format ID */ u8 format; u8 n_planes; + enum mmu_prefetch_mode mmu_prefetch_mode; + u32 mmu_prefetch_pgsize; }; #define to_malidp_plane(x) container_of(x, struct malidp_plane, base) diff --git a/drivers/gpu/drm/arm/malidp_hw.c b/drivers/gpu/drm/arm/malidp_hw.c index c94a4422e0e9..4233be1c5709 100644 --- a/drivers/gpu/drm/arm/malidp_hw.c +++ b/drivers/gpu/drm/arm/malidp_hw.c @@ -96,6 +96,19 @@ static const struct malidp_layer malidp550_layers[] = { { DE_SMART, MALIDP550_DE_LS_BASE, MALIDP550_DE_LS_PTR_BASE, MALIDP550_DE_LS_R1_STRIDE, 0 }, }; +static const struct malidp_layer malidp650_layers[] = { + { DE_VIDEO1, MALIDP550_DE_LV1_BASE, MALIDP550_DE_LV1_PTR_BASE, + MALIDP_DE_LV_STRIDE0, MALIDP550_LV_YUV2RGB, + MALIDP650_DE_LV_MMU_CTRL }, + { DE_GRAPHICS1, MALIDP550_DE_LG_BASE, MALIDP550_DE_LG_PTR_BASE, + MALIDP_DE_LG_STRIDE, 0, MALIDP650_DE_LG_MMU_CTRL }, + { DE_VIDEO2, MALIDP550_DE_LV2_BASE, MALIDP550_DE_LV2_PTR_BASE, + MALIDP_DE_LV_STRIDE0, MALIDP550_LV_YUV2RGB, + MALIDP650_DE_LV_MMU_CTRL }, + { DE_SMART, MALIDP550_DE_LS_BASE, MALIDP550_DE_LS_PTR_BASE, + MALIDP550_DE_LS_R1_STRIDE, 0, MALIDP650_DE_LS_MMU_CTRL }, +}; + #define SE_N_SCALING_COEFFS 96 static const u16 dp500_se_scaling_coeffs[][SE_N_SCALING_COEFFS] = { [MALIDP_UPSCALING_COEFFS - 1] = { @@ -832,8 +845,8 @@ const struct malidp_hw malidp_device[MALIDP_MAX_DEVICES] = { .dc_base = MALIDP550_DC_BASE, .out_depth_base = MALIDP550_DE_OUTPUT_DEPTH, .features = MALIDP_REGMAP_HAS_CLEARIRQ, - .n_layers = ARRAY_SIZE(malidp550_layers), - .layers = malidp550_layers, + .n_layers = ARRAY_SIZE(malidp650_layers), + .layers = malidp650_layers, .de_irq_map = { .irq_mask = MALIDP_DE_IRQ_UNDERRUN | MALIDP650_DE_IRQ_DRIFT | diff --git a/drivers/gpu/drm/arm/malidp_hw.h b/drivers/gpu/drm/arm/malidp_hw.h index ad2e96915d44..39b92a9fb810 100644 --- a/drivers/gpu/drm/arm/malidp_hw.h +++ b/drivers/gpu/drm/arm/malidp_hw.h @@ -62,6 +62,7 @@ struct malidp_layer { u16 ptr; /* address offset for the pointer register */ u16 stride_offset; /* offset to the first stride register. */ s16 yuv2rgb_offset; /* offset to the YUV->RGB matrix entries */ + u16 mmu_ctrl_offset; /* offset to the MMU control register */ }; enum malidp_scaling_coeff_set { diff --git a/drivers/gpu/drm/arm/malidp_planes.c b/drivers/gpu/drm/arm/malidp_planes.c index 29409a65d864..99c487be9a1d 100644 --- a/drivers/gpu/drm/arm/malidp_planes.c +++ b/drivers/gpu/drm/arm/malidp_planes.c @@ -10,11 +10,14 @@ * ARM Mali DP plane manipulation routines. */ +#include <linux/iommu.h> + #include <drm/drmP.h> #include <drm/drm_atomic.h> #include <drm/drm_atomic_helper.h> #include <drm/drm_fb_cma_helper.h> #include <drm/drm_gem_cma_helper.h> +#include <drm/drm_gem_framebuffer_helper.h> #include <drm/drm_plane_helper.h> #include <drm/drm_print.h> @@ -56,6 +59,13 @@ */ #define MALIDP_ALPHA_LUT 0xffaa5500 +/* page sizes the MMU prefetcher can support */ +#define MALIDP_MMU_PREFETCH_PARTIAL_PGSIZES (SZ_4K | SZ_64K) +#define MALIDP_MMU_PREFETCH_FULL_PGSIZES (SZ_1M | SZ_2M) + +/* readahead for partial-frame prefetch */ +#define MALIDP_MMU_PREFETCH_READAHEAD 8 + static void malidp_de_plane_destroy(struct drm_plane *plane) { struct malidp_plane *mp = to_malidp_plane(plane); @@ -103,6 +113,9 @@ drm_plane_state *malidp_duplicate_plane_state(struct drm_plane *plane) state->format = m_state->format; state->n_planes = m_state->n_planes; + state->mmu_prefetch_mode = m_state->mmu_prefetch_mode; + state->mmu_prefetch_pgsize = m_state->mmu_prefetch_pgsize; + return &state->base; } @@ -115,6 +128,12 @@ static void malidp_destroy_plane_state(struct drm_plane *plane, kfree(m_state); } +static const char * const prefetch_mode_names[] = { + [MALIDP_PREFETCH_MODE_NONE] = "MMU_PREFETCH_NONE", + [MALIDP_PREFETCH_MODE_PARTIAL] = "MMU_PREFETCH_PARTIAL", + [MALIDP_PREFETCH_MODE_FULL] = "MMU_PREFETCH_FULL", +}; + static void malidp_plane_atomic_print_state(struct drm_printer *p, const struct drm_plane_state *state) { @@ -123,6 +142,9 @@ static void malidp_plane_atomic_print_state(struct drm_printer *p, drm_printf(p, "\trotmem_size=%u\n", ms->rotmem_size); drm_printf(p, "\tformat_id=%u\n", ms->format); drm_printf(p, "\tn_planes=%u\n", ms->n_planes); + drm_printf(p, "\tmmu_prefetch_mode=%s\n", + prefetch_mode_names[ms->mmu_prefetch_mode]); + drm_printf(p, "\tmmu_prefetch_pgsize=%d\n", ms->mmu_prefetch_pgsize); } static const struct drm_plane_funcs malidp_de_plane_funcs = { @@ -176,6 +198,9 @@ static int malidp_se_check_scaling(struct malidp_plane *mp, return 0; } +static void malidp_de_prefetch_settings(struct malidp_plane *mp, + struct malidp_plane_state *ms); + static int malidp_de_plane_check(struct drm_plane *plane, struct drm_plane_state *state) { @@ -245,6 +270,7 @@ static int malidp_de_plane_check(struct drm_plane *plane, ms->rotmem_size = val; } + malidp_de_prefetch_settings(mp, ms); return 0; } @@ -321,6 +347,210 @@ static void malidp_de_set_color_encoding(struct malidp_plane *plane, } } +static u32 malidp_get_pgsize_bitmap(struct malidp_plane *mp) +{ + u32 pgsize_bitmap = 0; + + if (iommu_present(&platform_bus_type)) { + struct iommu_domain *mmu_dom = + iommu_get_domain_for_dev(mp->base.dev->dev); + + if (mmu_dom) + pgsize_bitmap = mmu_dom->pgsize_bitmap; + } + + return pgsize_bitmap; +} + +/* + * Check if the framebuffer is entirely made up of pages at least pgsize in + * size. Only a heuristic: assumes that each scatterlist entry has been aligned + * to the largest page size smaller than its length and that the MMU maps to + * the largest page size possible. + */ +static bool malidp_check_pages_threshold(struct malidp_plane_state *ms, + u32 pgsize) +{ + int i; + + for (i = 0; i < ms->n_planes; i++) { + struct drm_gem_object *obj; + struct sg_table *sgt; + struct scatterlist *sgl; + + obj = drm_gem_fb_get_obj(ms->base.fb, i); + sgt = obj->dev->driver->gem_prime_get_sg_table(obj); + + if (!sgt) + return false; + + sgl = sgt->sgl; + + while (sgl) { + if (sgl->length < pgsize) { + kfree(sgt); + return false; + } + + sgl = sg_next(sgl); + } + + kfree(sgt); + } + + return true; +} + +/* + * Check if it is possible to enable partial-frame MMU prefetch given the + * current format, AFBC state and rotation. + */ +static bool malidp_partial_prefetch_supported(u32 format, u64 modifier, + unsigned int rotation) +{ + bool afbc, sparse; + + /* rotation and horizontal flip not supported for partial prefetch */ + if (rotation & (DRM_MODE_ROTATE_90 | DRM_MODE_ROTATE_180 | + DRM_MODE_ROTATE_270 | DRM_MODE_REFLECT_X)) + return false; + + afbc = modifier & DRM_FORMAT_MOD_ARM_AFBC(0); + sparse = modifier & AFBC_FORMAT_MOD_SPARSE; + + switch (format) { + case DRM_FORMAT_ARGB2101010: + case DRM_FORMAT_RGBA1010102: + case DRM_FORMAT_BGRA1010102: + case DRM_FORMAT_ARGB8888: + case DRM_FORMAT_RGBA8888: + case DRM_FORMAT_BGRA8888: + case DRM_FORMAT_XRGB8888: + case DRM_FORMAT_XBGR8888: + case DRM_FORMAT_RGBX8888: + case DRM_FORMAT_BGRX8888: + case DRM_FORMAT_RGB888: + case DRM_FORMAT_RGBA5551: + case DRM_FORMAT_RGB565: + /* always supported */ + return true; + + case DRM_FORMAT_ABGR2101010: + case DRM_FORMAT_ABGR8888: + case DRM_FORMAT_ABGR1555: + case DRM_FORMAT_BGR565: + /* supported, but if AFBC then must be sparse mode */ + return (!afbc) || (afbc && sparse); + + case DRM_FORMAT_BGR888: + /* supported, but not for AFBC */ + return !afbc; + + case DRM_FORMAT_YUYV: + case DRM_FORMAT_UYVY: + case DRM_FORMAT_NV12: + case DRM_FORMAT_YUV420: + /* not supported */ + return false; + + default: + return false; + } +} + +/* + * Select the preferred MMU prefetch mode. Full-frame prefetch is preferred as + * long as the framebuffer is all large pages. Otherwise partial-frame prefetch + * is selected as long as it is supported for the current format. The selected + * page size for prefetch is returned in pgsize_bitmap. + */ +static enum mmu_prefetch_mode malidp_mmu_prefetch_select_mode + (struct malidp_plane_state *ms, u32 *pgsize_bitmap) +{ + u32 pgsizes; + + /* get the full-frame prefetch page size(s) supported by the MMU */ + pgsizes = *pgsize_bitmap & MALIDP_MMU_PREFETCH_FULL_PGSIZES; + + while (pgsizes) { + u32 largest_pgsize = 1 << __fls(pgsizes); + + if (malidp_check_pages_threshold(ms, largest_pgsize)) { + *pgsize_bitmap = largest_pgsize; + return MALIDP_PREFETCH_MODE_FULL; + } + + pgsizes -= largest_pgsize; + } + + /* get the partial-frame prefetch page size(s) supported by the MMU */ + pgsizes = *pgsize_bitmap & MALIDP_MMU_PREFETCH_PARTIAL_PGSIZES; + + if (malidp_partial_prefetch_supported(ms->base.fb->format->format, + ms->base.fb->modifier, + ms->base.rotation)) { + /* partial prefetch using the smallest page size */ + *pgsize_bitmap = 1 << __ffs(pgsizes); + return MALIDP_PREFETCH_MODE_PARTIAL; + } + *pgsize_bitmap = 0; + return MALIDP_PREFETCH_MODE_NONE; +} + +static u32 malidp_calc_mmu_control_value(enum mmu_prefetch_mode mode, + u8 readahead, u8 n_planes, u32 pgsize) +{ + u32 mmu_ctrl = 0; + + if (mode != MALIDP_PREFETCH_MODE_NONE) { + mmu_ctrl |= MALIDP_MMU_CTRL_EN; + + if (mode == MALIDP_PREFETCH_MODE_PARTIAL) { + mmu_ctrl |= MALIDP_MMU_CTRL_MODE; + mmu_ctrl |= MALIDP_MMU_CTRL_PP_NUM_REQ(readahead); + } + + if (pgsize == SZ_64K || pgsize == SZ_2M) { + int i; + + for (i = 0; i < n_planes; i++) + mmu_ctrl |= MALIDP_MMU_CTRL_PX_PS(i); + } + } + + return mmu_ctrl; +} + +static void malidp_de_prefetch_settings(struct malidp_plane *mp, + struct malidp_plane_state *ms) +{ + if (!mp->layer->mmu_ctrl_offset) + return; + + /* get the page sizes supported by the MMU */ + ms->mmu_prefetch_pgsize = malidp_get_pgsize_bitmap(mp); + ms->mmu_prefetch_mode = + malidp_mmu_prefetch_select_mode(ms, &ms->mmu_prefetch_pgsize); +} + +static void malidp_de_set_mmu_control(struct malidp_plane *mp, + struct malidp_plane_state *ms) +{ + u32 mmu_ctrl; + + /* check hardware supports MMU prefetch */ + if (!mp->layer->mmu_ctrl_offset) + return; + + mmu_ctrl = malidp_calc_mmu_control_value(ms->mmu_prefetch_mode, + MALIDP_MMU_PREFETCH_READAHEAD, + ms->n_planes, + ms->mmu_prefetch_pgsize); + + malidp_hw_write(mp->hwdev, mmu_ctrl, + mp->layer->base + mp->layer->mmu_ctrl_offset); +} + static void malidp_de_plane_update(struct drm_plane *plane, struct drm_plane_state *old_state) { @@ -351,6 +581,9 @@ static void malidp_de_plane_update(struct drm_plane *plane, malidp_hw_write(mp->hwdev, lower_32_bits(fb_addr), ptr); malidp_hw_write(mp->hwdev, upper_32_bits(fb_addr), ptr + 4); } + + malidp_de_set_mmu_control(mp, ms); + malidp_de_set_plane_pitches(mp, ms->n_planes, plane->state->fb->pitches); diff --git a/drivers/gpu/drm/arm/malidp_regs.h b/drivers/gpu/drm/arm/malidp_regs.h index 3579d36b2a71..c60fff4b2aaf 100644 --- a/drivers/gpu/drm/arm/malidp_regs.h +++ b/drivers/gpu/drm/arm/malidp_regs.h @@ -245,6 +245,17 @@ #define MALIDP550_CONFIG_VALID 0x0c014 #define MALIDP550_CONFIG_ID 0x0ffd4 +/* register offsets specific to DP650 */ +#define MALIDP650_DE_LV_MMU_CTRL 0x000D0 +#define MALIDP650_DE_LG_MMU_CTRL 0x00048 +#define MALIDP650_DE_LS_MMU_CTRL 0x00078 + +/* bit masks to set the MMU control register */ +#define MALIDP_MMU_CTRL_EN (1 << 0) +#define MALIDP_MMU_CTRL_MODE (1 << 4) +#define MALIDP_MMU_CTRL_PX_PS(x) (1 << (8 + (x))) +#define MALIDP_MMU_CTRL_PP_NUM_REQ(x) (((x) & 0x7f) << 12) + /* * Starting with DP550 the register map blocks has been standardised to the * following layout: