Alloc GEM buffers backed by noncoherent memory on SoCs where it is actually faster than write-combine.
This dramatically speeds up software rendering on these SoCs, even for tasks where write-combine memory should in theory be faster (e.g. simple blits).
v3: The option is now selected per-SoC instead of being a module parameter.
v5: - Fix drm_atomic_get_new_plane_state() used to retrieve the old state - Use custom drm_gem_fb_create() - Only check damage clips and sync DMA buffers if non-coherent buffers are used
Signed-off-by: Paul Cercueil paul@crapouillou.net --- drivers/gpu/drm/ingenic/ingenic-drm-drv.c | 59 +++++++++++++++++++++-- drivers/gpu/drm/ingenic/ingenic-drm.h | 1 + drivers/gpu/drm/ingenic/ingenic-ipu.c | 21 ++++++-- 3 files changed, 74 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/ingenic/ingenic-drm-drv.c b/drivers/gpu/drm/ingenic/ingenic-drm-drv.c index 389cad59e090..5244f4763477 100644 --- a/drivers/gpu/drm/ingenic/ingenic-drm-drv.c +++ b/drivers/gpu/drm/ingenic/ingenic-drm-drv.c @@ -9,6 +9,7 @@ #include <linux/component.h> #include <linux/clk.h> #include <linux/dma-mapping.h> +#include <linux/io.h> #include <linux/module.h> #include <linux/mutex.h> #include <linux/of_device.h> @@ -23,6 +24,7 @@ #include <drm/drm_color_mgmt.h> #include <drm/drm_crtc.h> #include <drm/drm_crtc_helper.h> +#include <drm/drm_damage_helper.h> #include <drm/drm_drv.h> #include <drm/drm_encoder.h> #include <drm/drm_gem_cma_helper.h> @@ -57,6 +59,7 @@ struct ingenic_dma_hwdescs { struct jz_soc_info { bool needs_dev_clk; bool has_osd; + bool map_noncoherent; unsigned int max_width, max_height; const u32 *formats_f0, *formats_f1; unsigned int num_formats_f0, num_formats_f1; @@ -410,6 +413,9 @@ static int ingenic_drm_plane_atomic_check(struct drm_plane *plane, old_plane_state->fb->format->format != new_plane_state->fb->format->format)) crtc_state->mode_changed = true;
+ if (priv->soc_info->map_noncoherent) + drm_atomic_helper_check_plane_damage(state, new_plane_state); + return 0; }
@@ -526,6 +532,13 @@ void ingenic_drm_plane_config(struct device *dev, } }
+bool ingenic_drm_map_noncoherent(const struct device *dev) +{ + const struct ingenic_drm *priv = dev_get_drvdata(dev); + + return priv->soc_info->map_noncoherent; +} + static void ingenic_drm_update_palette(struct ingenic_drm *priv, const struct drm_color_lut *lut) { @@ -544,8 +557,8 @@ static void ingenic_drm_plane_atomic_update(struct drm_plane *plane, struct drm_atomic_state *state) { struct ingenic_drm *priv = drm_device_get_priv(plane->dev); - struct drm_plane_state *newstate = drm_atomic_get_new_plane_state(state, - plane); + struct drm_plane_state *newstate = drm_atomic_get_new_plane_state(state, plane); + struct drm_plane_state *oldstate = drm_atomic_get_old_plane_state(state, plane); struct drm_crtc_state *crtc_state; struct ingenic_dma_hwdesc *hwdesc; unsigned int width, height, cpp, offset; @@ -553,6 +566,9 @@ static void ingenic_drm_plane_atomic_update(struct drm_plane *plane, u32 fourcc;
if (newstate && newstate->fb) { + if (priv->soc_info->map_noncoherent) + drm_fb_cma_sync_non_coherent(&priv->drm, oldstate, newstate); + crtc_state = newstate->crtc->state;
addr = drm_fb_cma_get_gem_addr(newstate->fb, newstate, 0); @@ -742,6 +758,33 @@ static void ingenic_drm_disable_vblank(struct drm_crtc *crtc) regmap_update_bits(priv->map, JZ_REG_LCD_CTRL, JZ_LCD_CTRL_EOF_IRQ, 0); }
+static struct drm_framebuffer * +ingenic_drm_gem_fb_create(struct drm_device *drm, struct drm_file *file, + const struct drm_mode_fb_cmd2 *mode_cmd) +{ + struct ingenic_drm *priv = drm_device_get_priv(drm); + + if (priv->soc_info->map_noncoherent) + return drm_gem_fb_create_with_dirty(drm, file, mode_cmd); + + return drm_gem_fb_create(drm, file, mode_cmd); +} + +static struct drm_gem_object * +ingenic_drm_gem_create_object(struct drm_device *drm, size_t size) +{ + struct ingenic_drm *priv = drm_device_get_priv(drm); + struct drm_gem_cma_object *obj; + + obj = kzalloc(sizeof(*obj), GFP_KERNEL); + if (!obj) + return ERR_PTR(-ENOMEM); + + obj->map_noncoherent = priv->soc_info->map_noncoherent; + + return &obj->base; +} + DEFINE_DRM_GEM_CMA_FOPS(ingenic_drm_fops);
static const struct drm_driver ingenic_drm_driver_data = { @@ -754,6 +797,7 @@ static const struct drm_driver ingenic_drm_driver_data = { .patchlevel = 0,
.fops = &ingenic_drm_fops, + .gem_create_object = ingenic_drm_gem_create_object, DRM_GEM_CMA_DRIVER_OPS,
.irq_handler = ingenic_drm_irq_handler, @@ -804,7 +848,7 @@ static const struct drm_encoder_helper_funcs ingenic_drm_encoder_helper_funcs = };
static const struct drm_mode_config_funcs ingenic_drm_mode_config_funcs = { - .fb_create = drm_gem_fb_create, + .fb_create = ingenic_drm_gem_fb_create, .output_poll_changed = drm_fb_helper_output_poll_changed, .atomic_check = drm_atomic_helper_check, .atomic_commit = drm_atomic_helper_commit, @@ -961,6 +1005,9 @@ static int ingenic_drm_bind(struct device *dev, bool has_components) return ret; }
+ if (soc_info->map_noncoherent) + drm_plane_enable_fb_damage_clips(&priv->f1); + drm_crtc_helper_add(&priv->crtc, &ingenic_drm_crtc_helper_funcs);
ret = drm_crtc_init_with_planes(drm, &priv->crtc, primary, @@ -989,6 +1036,9 @@ static int ingenic_drm_bind(struct device *dev, bool has_components) return ret; }
+ if (soc_info->map_noncoherent) + drm_plane_enable_fb_damage_clips(&priv->f0); + if (IS_ENABLED(CONFIG_DRM_INGENIC_IPU) && has_components) { ret = component_bind_all(dev, drm); if (ret) { @@ -1245,6 +1295,7 @@ static const u32 jz4770_formats_f0[] = { static const struct jz_soc_info jz4740_soc_info = { .needs_dev_clk = true, .has_osd = false, + .map_noncoherent = false, .max_width = 800, .max_height = 600, .formats_f1 = jz4740_formats, @@ -1255,6 +1306,7 @@ static const struct jz_soc_info jz4740_soc_info = { static const struct jz_soc_info jz4725b_soc_info = { .needs_dev_clk = false, .has_osd = true, + .map_noncoherent = false, .max_width = 800, .max_height = 600, .formats_f1 = jz4725b_formats_f1, @@ -1266,6 +1318,7 @@ static const struct jz_soc_info jz4725b_soc_info = { static const struct jz_soc_info jz4770_soc_info = { .needs_dev_clk = false, .has_osd = true, + .map_noncoherent = true, .max_width = 1280, .max_height = 720, .formats_f1 = jz4770_formats_f1, diff --git a/drivers/gpu/drm/ingenic/ingenic-drm.h b/drivers/gpu/drm/ingenic/ingenic-drm.h index 1b4347f7f084..22654ac1dde1 100644 --- a/drivers/gpu/drm/ingenic/ingenic-drm.h +++ b/drivers/gpu/drm/ingenic/ingenic-drm.h @@ -184,6 +184,7 @@ struct platform_driver; void ingenic_drm_plane_config(struct device *dev, struct drm_plane *plane, u32 fourcc); void ingenic_drm_plane_disable(struct device *dev, struct drm_plane *plane); +bool ingenic_drm_map_noncoherent(const struct device *dev);
extern struct platform_driver *ingenic_ipu_driver_ptr;
diff --git a/drivers/gpu/drm/ingenic/ingenic-ipu.c b/drivers/gpu/drm/ingenic/ingenic-ipu.c index 3b1091e7c0cd..61b6d9fdbba1 100644 --- a/drivers/gpu/drm/ingenic/ingenic-ipu.c +++ b/drivers/gpu/drm/ingenic/ingenic-ipu.c @@ -20,10 +20,13 @@
#include <drm/drm_atomic.h> #include <drm/drm_atomic_helper.h> +#include <drm/drm_damage_helper.h> #include <drm/drm_drv.h> #include <drm/drm_fb_cma_helper.h> #include <drm/drm_fourcc.h> #include <drm/drm_gem_atomic_helper.h> +#include <drm/drm_gem_cma_helper.h> +#include <drm/drm_gem_framebuffer_helper.h> #include <drm/drm_plane.h> #include <drm/drm_plane_helper.h> #include <drm/drm_property.h> @@ -285,8 +288,8 @@ static void ingenic_ipu_plane_atomic_update(struct drm_plane *plane, struct drm_atomic_state *state) { struct ingenic_ipu *ipu = plane_to_ingenic_ipu(plane); - struct drm_plane_state *newstate = drm_atomic_get_new_plane_state(state, - plane); + struct drm_plane_state *newstate = drm_atomic_get_new_plane_state(state, plane); + struct drm_plane_state *oldstate = drm_atomic_get_old_plane_state(state, plane); const struct drm_format_info *finfo; u32 ctrl, stride = 0, coef_index = 0, format = 0; bool needs_modeset, upscaling_w, upscaling_h; @@ -317,6 +320,9 @@ static void ingenic_ipu_plane_atomic_update(struct drm_plane *plane, JZ_IPU_CTRL_CHIP_EN | JZ_IPU_CTRL_LCDC_SEL); }
+ if (ingenic_drm_map_noncoherent(ipu->master)) + drm_fb_cma_sync_non_coherent(ipu->drm, oldstate, newstate); + /* New addresses will be committed in vblank handler... */ ipu->addr_y = drm_fb_cma_get_gem_addr(newstate->fb, newstate, 0); if (finfo->num_planes > 1) @@ -541,7 +547,7 @@ static int ingenic_ipu_plane_atomic_check(struct drm_plane *plane,
if (!new_plane_state->crtc || !crtc_state->mode.hdisplay || !crtc_state->mode.vdisplay) - return 0; + goto out_check_damage;
/* Plane must be fully visible */ if (new_plane_state->crtc_x < 0 || new_plane_state->crtc_y < 0 || @@ -558,7 +564,7 @@ static int ingenic_ipu_plane_atomic_check(struct drm_plane *plane, return -EINVAL;
if (!osd_changed(new_plane_state, old_plane_state)) - return 0; + goto out_check_damage;
crtc_state->mode_changed = true;
@@ -592,6 +598,10 @@ static int ingenic_ipu_plane_atomic_check(struct drm_plane *plane, ipu->denom_w = denom_w; ipu->denom_h = denom_h;
+out_check_damage: + if (ingenic_drm_map_noncoherent(ipu->master)) + drm_atomic_helper_check_plane_damage(state, new_plane_state); + return 0; }
@@ -773,6 +783,9 @@ static int ingenic_ipu_bind(struct device *dev, struct device *master, void *d) return err; }
+ if (ingenic_drm_map_noncoherent(master)) + drm_plane_enable_fb_damage_clips(plane); + /* * Sharpness settings range is [0,32] * 0 : nearest-neighbor