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From:   Paul Cercueil <paul@crapouillou.net>
To:     Christoph Hellwig <hch@lst.de>, Dave Airlie <airlied@linux.ie>
Cc:     Stephen Rothwell <sfr@canb.auug.org.au>,
        Sam Ravnborg <sam@ravnborg.org>, od@zcrc.me,
        DRI <dri-devel@lists.freedesktop.org>,
        Linux Next Mailing List <linux-next@vger.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Paul Cercueil <paul@crapouillou.net>
Subject: [PATCH] Revert "gpu/drm: ingenic: Add option to mmap GEM buffers cached"
Date:   Sun,  4 Oct 2020 16:17:58 +0200
Message-Id: <20201004141758.1013317-1-paul@crapouillou.net>
In-Reply-To: <20200930165212.GA8833@lst.de>
References: <20200930165212.GA8833@lst.de>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

This reverts commit 37054fc81443cc6a8c3a38395f384412b8373d82.

At the very moment this commit was created, the DMA API it relied on was
modified in the DMA tree, which caused the driver to break in
linux-next.

Revert it for now, and it will be resubmitted later to work with the new
DMA API.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
---
 drivers/gpu/drm/ingenic/ingenic-drm-drv.c | 114 +---------------------
 drivers/gpu/drm/ingenic/ingenic-drm.h     |   4 -
 drivers/gpu/drm/ingenic/ingenic-ipu.c     |  12 +--
 3 files changed, 4 insertions(+), 126 deletions(-)

diff --git a/drivers/gpu/drm/ingenic/ingenic-drm-drv.c b/drivers/gpu/drm/ingenic/ingenic-drm-drv.c
index 0225dc1f5eb8..7d8b0ad52979 100644
--- a/drivers/gpu/drm/ingenic/ingenic-drm-drv.c
+++ b/drivers/gpu/drm/ingenic/ingenic-drm-drv.c
@@ -9,8 +9,6 @@
 #include <linux/component.h>
 #include <linux/clk.h>
 #include <linux/dma-mapping.h>
-#include <linux/dma-noncoherent.h>
-#include <linux/io.h>
 #include <linux/module.h>
 #include <linux/mutex.h>
 #include <linux/of_device.h>
@@ -24,7 +22,6 @@
 #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_gem_cma_helper.h>
 #include <drm/drm_fb_cma_helper.h>
@@ -100,11 +97,6 @@ struct ingenic_drm {
 	struct notifier_block clock_nb;
 };
 
-static bool ingenic_drm_cached_gem_buf;
-module_param_named(cached_gem_buffers, ingenic_drm_cached_gem_buf, bool, 0400);
-MODULE_PARM_DESC(cached_gem_buffers,
-		 "Enable fully cached GEM buffers [default=false]");
-
 static bool ingenic_drm_writeable_reg(struct device *dev, unsigned int reg)
 {
 	switch (reg) {
@@ -402,8 +394,6 @@ static int ingenic_drm_plane_atomic_check(struct drm_plane *plane,
 	     plane->state->fb->format->format != state->fb->format->format))
 		crtc_state->mode_changed = true;
 
-	drm_atomic_helper_check_plane_damage(state->state, state);
-
 	return 0;
 }
 
@@ -521,38 +511,6 @@ void ingenic_drm_plane_config(struct device *dev,
 	}
 }
 
-void ingenic_drm_sync_data(struct device *dev,
-			   struct drm_plane_state *old_state,
-			   struct drm_plane_state *state)
-{
-	const struct drm_format_info *finfo = state->fb->format;
-	struct ingenic_drm *priv = dev_get_drvdata(dev);
-	struct drm_atomic_helper_damage_iter iter;
-	unsigned int offset, i;
-	struct drm_rect clip;
-	dma_addr_t paddr;
-	void *addr;
-
-	if (!ingenic_drm_cached_gem_buf)
-		return;
-
-	drm_atomic_helper_damage_iter_init(&iter, old_state, state);
-
-	drm_atomic_for_each_plane_damage(&iter, &clip) {
-		for (i = 0; i < finfo->num_planes; i++) {
-			paddr = drm_fb_cma_get_gem_addr(state->fb, state, i);
-			addr = phys_to_virt(paddr);
-
-			/* Ignore x1/x2 values, invalidate complete lines */
-			offset = clip.y1 * state->fb->pitches[i];
-
-			dma_cache_sync(priv->dev, addr + offset,
-				       (clip.y2 - clip.y1) * state->fb->pitches[i],
-				       DMA_TO_DEVICE);
-		}
-	}
-}
-
 static void ingenic_drm_update_palette(struct ingenic_drm *priv,
 				       const struct drm_color_lut *lut)
 {
@@ -581,8 +539,6 @@ static void ingenic_drm_plane_atomic_update(struct drm_plane *plane,
 	if (state && state->fb) {
 		crtc_state = state->crtc->state;
 
-		ingenic_drm_sync_data(priv->dev, oldstate, state);
-
 		addr = drm_fb_cma_get_gem_addr(state->fb, state, 0);
 		width = state->src_w >> 16;
 		height = state->src_h >> 16;
@@ -752,69 +708,7 @@ 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 *dev, struct drm_file *file,
-			  const struct drm_mode_fb_cmd2 *mode_cmd)
-{
-	if (ingenic_drm_cached_gem_buf)
-		return drm_gem_fb_create_with_dirty(dev, file, mode_cmd);
-
-	return drm_gem_fb_create(dev, file, mode_cmd);
-}
-
-static int ingenic_drm_gem_mmap(struct drm_gem_object *obj,
-				struct vm_area_struct *vma)
-{
-	struct drm_gem_cma_object *cma_obj = to_drm_gem_cma_obj(obj);
-	struct device *dev = cma_obj->base.dev->dev;
-	unsigned long attrs;
-	int ret;
-
-	if (ingenic_drm_cached_gem_buf)
-		attrs = DMA_ATTR_NON_CONSISTENT;
-	else
-		attrs = DMA_ATTR_WRITE_COMBINE;
-
-	/*
-	 * Clear the VM_PFNMAP flag that was set by drm_gem_mmap(), and set the
-	 * vm_pgoff (used as a fake buffer offset by DRM) to 0 as we want to map
-	 * the whole buffer.
-	 */
-	vma->vm_flags &= ~VM_PFNMAP;
-	vma->vm_pgoff = 0;
-	vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
-
-	ret = dma_mmap_attrs(dev, vma, cma_obj->vaddr, cma_obj->paddr,
-			     vma->vm_end - vma->vm_start, attrs);
-	if (ret)
-		drm_gem_vm_close(vma);
-
-	return ret;
-}
-
-static int ingenic_drm_gem_cma_mmap(struct file *filp,
-				    struct vm_area_struct *vma)
-{
-	int ret;
-
-	ret = drm_gem_mmap(filp, vma);
-	if (ret)
-		return ret;
-
-	return ingenic_drm_gem_mmap(vma->vm_private_data, vma);
-}
-
-static const struct file_operations ingenic_drm_fops = {
-	.owner		= THIS_MODULE,
-	.open		= drm_open,
-	.release	= drm_release,
-	.unlocked_ioctl	= drm_ioctl,
-	.compat_ioctl	= drm_compat_ioctl,
-	.poll		= drm_poll,
-	.read		= drm_read,
-	.llseek		= noop_llseek,
-	.mmap		= ingenic_drm_gem_cma_mmap,
-};
+DEFINE_DRM_GEM_CMA_FOPS(ingenic_drm_fops);
 
 static struct drm_driver ingenic_drm_driver_data = {
 	.driver_features	= DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,
@@ -878,7 +772,7 @@ 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		= ingenic_drm_gem_fb_create,
+	.fb_create		= 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,
@@ -1032,8 +926,6 @@ 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, &priv->f1,
@@ -1062,8 +954,6 @@ 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) {
diff --git a/drivers/gpu/drm/ingenic/ingenic-drm.h b/drivers/gpu/drm/ingenic/ingenic-drm.h
index ee3a892c0383..9b48ce02803d 100644
--- a/drivers/gpu/drm/ingenic/ingenic-drm.h
+++ b/drivers/gpu/drm/ingenic/ingenic-drm.h
@@ -171,10 +171,6 @@ 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);
 
-void ingenic_drm_sync_data(struct device *dev,
-			   struct drm_plane_state *old_state,
-			   struct drm_plane_state *state);
-
 extern struct platform_driver *ingenic_ipu_driver_ptr;
 
 #endif /* DRIVERS_GPU_DRM_INGENIC_INGENIC_DRM_H */
diff --git a/drivers/gpu/drm/ingenic/ingenic-ipu.c b/drivers/gpu/drm/ingenic/ingenic-ipu.c
index 38c83e8cc6a5..fc8c6e970ee3 100644
--- a/drivers/gpu/drm/ingenic/ingenic-ipu.c
+++ b/drivers/gpu/drm/ingenic/ingenic-ipu.c
@@ -20,7 +20,6 @@
 
 #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>
@@ -317,8 +316,6 @@ static void ingenic_ipu_plane_atomic_update(struct drm_plane *plane,
 				JZ_IPU_CTRL_CHIP_EN | JZ_IPU_CTRL_LCDC_SEL);
 	}
 
-	ingenic_drm_sync_data(ipu->master, oldstate, state);
-
 	/* New addresses will be committed in vblank handler... */
 	ipu->addr_y = drm_fb_cma_get_gem_addr(state->fb, state, 0);
 	if (finfo->num_planes > 1)
@@ -537,7 +534,7 @@ static int ingenic_ipu_plane_atomic_check(struct drm_plane *plane,
 
 	if (!state->crtc ||
 	    !crtc_state->mode.hdisplay || !crtc_state->mode.vdisplay)
-		goto out_check_damage;
+		return 0;
 
 	/* Plane must be fully visible */
 	if (state->crtc_x < 0 || state->crtc_y < 0 ||
@@ -554,7 +551,7 @@ static int ingenic_ipu_plane_atomic_check(struct drm_plane *plane,
 		return -EINVAL;
 
 	if (!osd_changed(state, plane->state))
-		goto out_check_damage;
+		return 0;
 
 	crtc_state->mode_changed = true;
 
@@ -581,9 +578,6 @@ 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->state, state);
-
 	return 0;
 }
 
@@ -765,8 +759,6 @@ static int ingenic_ipu_bind(struct device *dev, struct device *master, void *d)
 		return err;
 	}
 
-	drm_plane_enable_fb_damage_clips(plane);
-
 	/*
 	 * Sharpness settings range is [0,32]
 	 * 0       : nearest-neighbor
-- 
2.28.0