Hi Am 15.05.21 um 16:53 schrieb Paul Cercueil:
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. Signed-off-by: Paul Cercueil <[email protected]> --- drivers/gpu/drm/ingenic/ingenic-drm-drv.c | 56 ++++++++++++++++++++++- drivers/gpu/drm/ingenic/ingenic-ipu.c | 18 ++++++-- 2 files changed, 68 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/ingenic/ingenic-drm-drv.c b/drivers/gpu/drm/ingenic/ingenic-drm-drv.c index 09225b770bb8..5f64e8583eec 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 +413,8 @@ 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;+ drm_atomic_helper_check_plane_damage(state, new_plane_state);+ return 0; }@@ -544,8 +549,8 @@ 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 +558,8 @@ static void ingenic_drm_plane_atomic_update(struct drm_plane *plane, u32 fourcc;if (newstate && newstate->fb) {+ drm_gem_cma_sync_data(&priv->drm, oldstate, newstate); + crtc_state = newstate->crtc->state;addr = drm_fb_cma_get_gem_addr(newstate->fb, newstate, 0);@@ -742,6 +749,43 @@ 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 int ingenic_drm_atomic_helper_dirtyfb(struct drm_framebuffer *fb,+ struct drm_file *file_priv, + unsigned int flags, + unsigned int color, + struct drm_clip_rect *clips, + unsigned int num_clips) +{ + struct ingenic_drm *priv = drm_device_get_priv(fb->dev); + + if (!priv->soc_info->map_noncoherent) + return 0;
I'm not sure you can get away without calling drm_atomic_helper_dirtyfb(). The function does some things with the plane's damage-clips property. If you don't call it here, the plane might pile up unhandled clipping areas. It's better to call it and rely on the test in drm_gem_cma_sync_data(). See below on how to optimize this.
+ + return drm_atomic_helper_dirtyfb(fb, file_priv, flags, + color, clips, num_clips); +} ++static const struct drm_framebuffer_funcs ingenic_drm_gem_fb_funcs =
{
+ .destroy = drm_gem_fb_destroy, + .create_handle = drm_gem_fb_create_handle, + .dirty = ingenic_drm_atomic_helper_dirtyfb, +};
You don't seem to be using this anywhere. You have to implement a custom fb_create for drm_mode_config_funcs. [1]
BUT: I think the overall approach should be to only use this on SoCs with non-coherency setting. Use drm_gem_fb_create() on systems without non-coherency and use drm_gem_fb_create_with_dirty() on systems with non-coherency (i.e., have two instances of drm_mode_config_funcs). Only call drm_plane_enable_fb_damage_clips() on systems with non-coherency.
+ +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 +798,7 @@ 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,@@ -961,6 +1006,8 @@ static int ingenic_drm_bind(struct device *dev, bool has_components) return ret; }+ 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 +1036,8 @@ static int ingenic_drm_bind(struct device *dev, bool has_components) return ret; }+ 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 +1294,7 @@ 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 +1305,7 @@ 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 +1317,7 @@ 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-ipu.c b/drivers/gpu/drm/ingenic/ingenic-ipu.c index 3b1091e7c0cd..a4d1b500c3ad 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_new_plane_state(state, plane);
get_old_state ?
const struct drm_format_info *finfo; u32 ctrl, stride = 0, coef_index = 0, format = 0; bool needs_modeset, upscaling_w, upscaling_h; @@ -317,6 +320,8 @@ static void ingenic_ipu_plane_atomic_update(struct drm_plane *plane, JZ_IPU_CTRL_CHIP_EN | JZ_IPU_CTRL_LCDC_SEL); }+ drm_gem_cma_sync_data(ipu->drm, oldstate, newstate);+
If you want to optimize, maybe put this line behind if (priv->soc_info->map_noncoherent)
/* 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 +546,7 @@ 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 +563,7 @@ 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 +597,9 @@ static int ingenic_ipu_plane_atomic_check(struct drm_plane *plane,ipu->denom_w = denom_w; ipu->denom_h = denom_h;+out_check_damage:+ drm_atomic_helper_check_plane_damage(state, new_plane_state); +
If you implement my suggestion above, this line could also be behind if (priv->soc_info->map_noncoherent) Best regards Thomas[1] https://elixir.bootlin.com/linux/v5.13-rc1/source/drivers/gpu/drm/ingenic/ingenic-drm-drv.c#L808
-- Thomas Zimmermann Graphics Driver Developer SUSE Software Solutions Germany GmbH Maxfeldstr. 5, 90409 Nürnberg, Germany (HRB 36809, AG Nürnberg) Geschäftsführer: Felix Imendörffer
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