From f76c83b580043d55b2899719da61fe000839812d Mon Sep 17 00:00:00 2001 From: Daniel Kurtz Date: Mon, 12 Jan 2015 14:58:23 +0800 Subject: drm/rockchip: Only alloc a kmap for fbdev gem object In general, the data in drm/rockchip GEM objects is never accessed by the kernel. The objects are either accessed by a GPU, by display controller DMA, or by mmap'ing them to user space. Thus, these buffers need not be mapped into kernel address space. The only exception is the fbdev framebuffer(s), which may be written in-kernel by fbcon. Signed-off-by: Daniel Kurtz Signed-off-by: Mark Yao --- drivers/gpu/drm/rockchip/rockchip_drm_fbdev.c | 2 +- drivers/gpu/drm/rockchip/rockchip_drm_gem.c | 17 ++++++++++++----- drivers/gpu/drm/rockchip/rockchip_drm_gem.h | 3 ++- 3 files changed, 15 insertions(+), 7 deletions(-) (limited to 'drivers/gpu/drm/rockchip') diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_fbdev.c b/drivers/gpu/drm/rockchip/rockchip_drm_fbdev.c index a5d889a8716b..17d19542c8a9 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_fbdev.c +++ b/drivers/gpu/drm/rockchip/rockchip_drm_fbdev.c @@ -71,7 +71,7 @@ static int rockchip_drm_fbdev_create(struct drm_fb_helper *helper, size = mode_cmd.pitches[0] * mode_cmd.height; - rk_obj = rockchip_gem_create_object(dev, size); + rk_obj = rockchip_gem_create_object(dev, size, true); if (IS_ERR(rk_obj)) return -ENOMEM; diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c index 7ca8799ef784..eb2282cc4a56 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_gem.c +++ b/drivers/gpu/drm/rockchip/rockchip_drm_gem.c @@ -22,7 +22,8 @@ #include "rockchip_drm_drv.h" #include "rockchip_drm_gem.h" -static int rockchip_gem_alloc_buf(struct rockchip_gem_object *rk_obj) +static int rockchip_gem_alloc_buf(struct rockchip_gem_object *rk_obj, + bool alloc_kmap) { struct drm_gem_object *obj = &rk_obj->base; struct drm_device *drm = obj->dev; @@ -30,7 +31,9 @@ static int rockchip_gem_alloc_buf(struct rockchip_gem_object *rk_obj) init_dma_attrs(&rk_obj->dma_attrs); dma_set_attr(DMA_ATTR_WRITE_COMBINE, &rk_obj->dma_attrs); - /* TODO(djkurtz): Use DMA_ATTR_NO_KERNEL_MAPPING except for fbdev */ + if (!alloc_kmap) + dma_set_attr(DMA_ATTR_NO_KERNEL_MAPPING, &rk_obj->dma_attrs); + rk_obj->kvaddr = dma_alloc_attrs(drm->dev, obj->size, &rk_obj->dma_addr, GFP_KERNEL, &rk_obj->dma_attrs); @@ -103,7 +106,8 @@ int rockchip_gem_mmap(struct file *filp, struct vm_area_struct *vma) } struct rockchip_gem_object * - rockchip_gem_create_object(struct drm_device *drm, unsigned int size) + rockchip_gem_create_object(struct drm_device *drm, unsigned int size, + bool alloc_kmap) { struct rockchip_gem_object *rk_obj; struct drm_gem_object *obj; @@ -119,7 +123,7 @@ struct rockchip_gem_object * drm_gem_private_object_init(drm, obj, size); - ret = rockchip_gem_alloc_buf(rk_obj); + ret = rockchip_gem_alloc_buf(rk_obj, alloc_kmap); if (ret) goto err_free_rk_obj; @@ -163,7 +167,7 @@ rockchip_gem_create_with_handle(struct drm_file *file_priv, struct drm_gem_object *obj; int ret; - rk_obj = rockchip_gem_create_object(drm, size); + rk_obj = rockchip_gem_create_object(drm, size, false); if (IS_ERR(rk_obj)) return ERR_CAST(rk_obj); @@ -282,6 +286,9 @@ void *rockchip_gem_prime_vmap(struct drm_gem_object *obj) { struct rockchip_gem_object *rk_obj = to_rockchip_obj(obj); + if (dma_get_attr(DMA_ATTR_NO_KERNEL_MAPPING, &rk_obj->dma_attrs)) + return NULL; + return rk_obj->kvaddr; } diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_gem.h b/drivers/gpu/drm/rockchip/rockchip_drm_gem.h index 67bcebe90003..ad22618473a4 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_gem.h +++ b/drivers/gpu/drm/rockchip/rockchip_drm_gem.h @@ -41,7 +41,8 @@ int rockchip_gem_mmap_buf(struct drm_gem_object *obj, struct vm_area_struct *vma); struct rockchip_gem_object * - rockchip_gem_create_object(struct drm_device *drm, unsigned int size); + rockchip_gem_create_object(struct drm_device *drm, unsigned int size, + bool alloc_kmap); void rockchip_gem_free_object(struct drm_gem_object *obj); -- cgit v1.2.3 From 44ddb7ef38ae720849cf81e71c370e55071b05a7 Mon Sep 17 00:00:00 2001 From: Mark Yao Date: Thu, 22 Jan 2015 11:15:02 +0800 Subject: drm/rockchip: vop: fix vop vsync/hsync polarity Vop set wrong vsync/hsync polarity, it may cause some display problem. known problem is that caused HDMI hdcp authenticate failed, caused pixel offset with hdmi display. the polarity description at RK3288 TRM doc: dsp_vsync_pol VSYNC polarity 1'b0 : negative 1'b1 : positive dsp_hsync_pol HSYNC polarity 1'b0 : negative 1'b1 : positive Signed-off-by: Mark Yao Reviewed-by: Daniel Kurtz Tested-by: Caesar Wang Tested-by: Heiko Stuebner --- drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/gpu/drm/rockchip') diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c index 9a5c571b95fc..2b145ba5dc17 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c +++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c @@ -874,8 +874,8 @@ static int vop_crtc_mode_set(struct drm_crtc *crtc, VOP_CTRL_SET(vop, out_mode, vop->connector_out_mode); val = 0x8; - val |= (adjusted_mode->flags & DRM_MODE_FLAG_NHSYNC) ? 1 : 0; - val |= (adjusted_mode->flags & DRM_MODE_FLAG_NVSYNC) ? (1 << 1) : 0; + val |= (adjusted_mode->flags & DRM_MODE_FLAG_NHSYNC) ? 0 : 1; + val |= (adjusted_mode->flags & DRM_MODE_FLAG_NVSYNC) ? 0 : (1 << 1); VOP_CTRL_SET(vop, pin_pol, val); VOP_CTRL_SET(vop, htotal_pw, (htotal << 16) | hsync_len); -- cgit v1.2.3 From 31e980c5a2d35ce411034b7fd842433542c1c60e Mon Sep 17 00:00:00 2001 From: Mark Yao Date: Thu, 22 Jan 2015 14:37:56 +0800 Subject: drm/rockchip: vop use is_enabled instead of dpms mode drm dpms have many power modes: ON,OFF,SUSPEND,STANDBY, etc. but vop only have enable/disable mode, maybe case such bug: --> DRM_DPMS_ON: power on vop --> DRM_DPMS_SUSPEND: power off vop --> DRM_DPMS_OFF: already power off at SUSPEND, crash so use a bool val is more suitable. Signed-off-by: Mark Yao --- drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 34 +++++++++++++++-------------- 1 file changed, 18 insertions(+), 16 deletions(-) (limited to 'drivers/gpu/drm/rockchip') diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c index 2b145ba5dc17..c75117a2f133 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c +++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c @@ -81,7 +81,7 @@ struct vop { struct drm_crtc crtc; struct device *dev; struct drm_device *drm_dev; - unsigned int dpms; + bool is_enabled; int connector_type; int connector_out_mode; @@ -387,6 +387,9 @@ static void vop_enable(struct drm_crtc *crtc) struct vop *vop = to_vop(crtc); int ret; + if (vop->is_enabled) + return; + ret = clk_enable(vop->hclk); if (ret < 0) { dev_err(vop->dev, "failed to enable hclk - %d\n", ret); @@ -427,6 +430,8 @@ static void vop_enable(struct drm_crtc *crtc) drm_vblank_on(vop->drm_dev, vop->pipe); + vop->is_enabled = true; + return; err_disable_aclk: @@ -441,6 +446,9 @@ static void vop_disable(struct drm_crtc *crtc) { struct vop *vop = to_vop(crtc); + if (!vop->is_enabled) + return; + drm_vblank_off(crtc->dev, vop->pipe); disable_irq(vop->irq); @@ -463,6 +471,8 @@ static void vop_disable(struct drm_crtc *crtc) clk_disable(vop->aclk); clk_disable(vop->hclk); + + vop->is_enabled = false; } /* @@ -742,7 +752,7 @@ static int vop_crtc_enable_vblank(struct drm_crtc *crtc) struct vop *vop = to_vop(crtc); unsigned long flags; - if (vop->dpms != DRM_MODE_DPMS_ON) + if (!vop->is_enabled) return -EPERM; spin_lock_irqsave(&vop->irq_lock, flags); @@ -759,8 +769,9 @@ static void vop_crtc_disable_vblank(struct drm_crtc *crtc) struct vop *vop = to_vop(crtc); unsigned long flags; - if (vop->dpms != DRM_MODE_DPMS_ON) + if (!vop->is_enabled) return; + spin_lock_irqsave(&vop->irq_lock, flags); vop_mask_write(vop, INTR_CTRL0, FS_INTR_MASK, FS_INTR_EN(0)); spin_unlock_irqrestore(&vop->irq_lock, flags); @@ -773,15 +784,8 @@ static const struct rockchip_crtc_funcs private_crtc_funcs = { static void vop_crtc_dpms(struct drm_crtc *crtc, int mode) { - struct vop *vop = to_vop(crtc); - DRM_DEBUG_KMS("crtc[%d] mode[%d]\n", crtc->base.id, mode); - if (vop->dpms == mode) { - DRM_DEBUG_KMS("desired dpms mode is same as previous one.\n"); - return; - } - switch (mode) { case DRM_MODE_DPMS_ON: vop_enable(crtc); @@ -795,8 +799,6 @@ static void vop_crtc_dpms(struct drm_crtc *crtc, int mode) DRM_DEBUG_KMS("unspecified mode %d\n", mode); break; } - - vop->dpms = mode; } static void vop_crtc_prepare(struct drm_crtc *crtc) @@ -934,9 +936,9 @@ static int vop_crtc_page_flip(struct drm_crtc *crtc, struct drm_framebuffer *old_fb = crtc->primary->fb; int ret; - /* when the page flip is requested, crtc's dpms should be on */ - if (vop->dpms > DRM_MODE_DPMS_ON) { - DRM_DEBUG("failed page flip request at dpms[%d].\n", vop->dpms); + /* when the page flip is requested, crtc should be on */ + if (!vop->is_enabled) { + DRM_DEBUG("page flip request rejected because crtc is off.\n"); return 0; } @@ -1302,7 +1304,7 @@ static int vop_initial(struct vop *vop) clk_disable(vop->hclk); - vop->dpms = DRM_MODE_DPMS_OFF; + vop->is_enabled = false; return 0; -- cgit v1.2.3 From 52ab7891fb8e45bda6015da8b5ac82ad600355e3 Mon Sep 17 00:00:00 2001 From: Mark Yao Date: Thu, 22 Jan 2015 18:29:57 +0800 Subject: drm/rockchip: vop: set vop enabled after enable iommu there is a Bug that: vop_enable()->drm_vblank_on, drm_vblank_on may call vop enable vblank. if it happen, vblank enable would failed, then cause irq status error. because is_enabled value is set after drm_vblank_on. after enable vop clocks and iommu regs, we can sure that R/W vop regs and do vop plane flip is safe, so place is_enabled = true after enable iommu is suitable. Signed-off-by: Mark Yao --- drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) (limited to 'drivers/gpu/drm/rockchip') diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c index c75117a2f133..04b619a8d064 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c +++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c @@ -420,6 +420,11 @@ static void vop_enable(struct drm_crtc *crtc) goto err_disable_aclk; } + /* + * At here, vop clock & iommu is enable, R/W vop regs would be safe. + */ + vop->is_enabled = true; + spin_lock(&vop->reg_lock); VOP_CTRL_SET(vop, standby, 0); @@ -430,8 +435,6 @@ static void vop_enable(struct drm_crtc *crtc) drm_vblank_on(vop->drm_dev, vop->pipe); - vop->is_enabled = true; - return; err_disable_aclk: @@ -462,6 +465,8 @@ static void vop_disable(struct drm_crtc *crtc) VOP_CTRL_SET(vop, standby, 1); spin_unlock(&vop->reg_lock); + + vop->is_enabled = false; /* * disable dclk to stop frame scan, so we can safely detach iommu, */ @@ -471,8 +476,6 @@ static void vop_disable(struct drm_crtc *crtc) clk_disable(vop->aclk); clk_disable(vop->hclk); - - vop->is_enabled = false; } /* -- cgit v1.2.3 From 1067219b27e29e925e7bdbb85b72c4c2bec0267e Mon Sep 17 00:00:00 2001 From: Mark Yao Date: Wed, 4 Feb 2015 13:10:31 +0800 Subject: drm/rockchip: vop: power off until vop standby take effect Vop standby will take effect at end of current frame, if dsp_hold_valid_irq happen, it means vop standby complete. we must wait standby complete when we want to disable aclk, if not, memory bus maybe dead. Reviewed-by: Heiko Stuebner Reviewed-by: Daniel Kurtz Signed-off-by: Mark Yao --- drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 77 ++++++++++++++++++++++++----- 1 file changed, 64 insertions(+), 13 deletions(-) (limited to 'drivers/gpu/drm/rockchip') diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c index 04b619a8d064..d041921b3bb9 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c +++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c @@ -89,6 +89,7 @@ struct vop { /* mutex vsync_ work */ struct mutex vsync_mutex; bool vsync_work_pending; + struct completion dsp_hold_completion; const struct vop_data *data; @@ -382,6 +383,36 @@ static bool is_alpha_support(uint32_t format) } } +static void vop_dsp_hold_valid_irq_enable(struct vop *vop) +{ + unsigned long flags; + + if (WARN_ON(!vop->is_enabled)) + return; + + spin_lock_irqsave(&vop->irq_lock, flags); + + vop_mask_write(vop, INTR_CTRL0, DSP_HOLD_VALID_INTR_MASK, + DSP_HOLD_VALID_INTR_EN(1)); + + spin_unlock_irqrestore(&vop->irq_lock, flags); +} + +static void vop_dsp_hold_valid_irq_disable(struct vop *vop) +{ + unsigned long flags; + + if (WARN_ON(!vop->is_enabled)) + return; + + spin_lock_irqsave(&vop->irq_lock, flags); + + vop_mask_write(vop, INTR_CTRL0, DSP_HOLD_VALID_INTR_MASK, + DSP_HOLD_VALID_INTR_EN(0)); + + spin_unlock_irqrestore(&vop->irq_lock, flags); +} + static void vop_enable(struct drm_crtc *crtc) { struct vop *vop = to_vop(crtc); @@ -454,26 +485,36 @@ static void vop_disable(struct drm_crtc *crtc) drm_vblank_off(crtc->dev, vop->pipe); - disable_irq(vop->irq); - /* - * TODO: Since standby doesn't take effect until the next vblank, - * when we turn off dclk below, the vop is probably still active. + * Vop standby will take effect at end of current frame, + * if dsp hold valid irq happen, it means standby complete. + * + * we must wait standby complete when we want to disable aclk, + * if not, memory bus maybe dead. */ + reinit_completion(&vop->dsp_hold_completion); + vop_dsp_hold_valid_irq_enable(vop); + spin_lock(&vop->reg_lock); VOP_CTRL_SET(vop, standby, 1); spin_unlock(&vop->reg_lock); + wait_for_completion(&vop->dsp_hold_completion); + + vop_dsp_hold_valid_irq_disable(vop); + + disable_irq(vop->irq); + vop->is_enabled = false; + /* - * disable dclk to stop frame scan, so we can safely detach iommu, + * vop standby complete, so iommu detach is safe. */ - clk_disable(vop->dclk); - rockchip_drm_dma_detach_device(vop->drm_dev, vop->dev); + clk_disable(vop->dclk); clk_disable(vop->aclk); clk_disable(vop->hclk); } @@ -1086,6 +1127,7 @@ static irqreturn_t vop_isr(int irq, void *data) struct vop *vop = data; uint32_t intr0_reg, active_irqs; unsigned long flags; + int ret = IRQ_NONE; /* * INTR_CTRL0 register has interrupt status, enable and clear bits, we @@ -1104,15 +1146,23 @@ static irqreturn_t vop_isr(int irq, void *data) if (!active_irqs) return IRQ_NONE; - /* Only Frame Start Interrupt is enabled; other irqs are spurious. */ - if (!(active_irqs & FS_INTR)) { - DRM_ERROR("Unknown VOP IRQs: %#02x\n", active_irqs); - return IRQ_NONE; + if (active_irqs & DSP_HOLD_VALID_INTR) { + complete(&vop->dsp_hold_completion); + active_irqs &= ~DSP_HOLD_VALID_INTR; + ret = IRQ_HANDLED; } - drm_handle_vblank(vop->drm_dev, vop->pipe); + if (active_irqs & FS_INTR) { + drm_handle_vblank(vop->drm_dev, vop->pipe); + active_irqs &= ~FS_INTR; + ret = (vop->vsync_work_pending) ? IRQ_WAKE_THREAD : IRQ_HANDLED; + } - return (vop->vsync_work_pending) ? IRQ_WAKE_THREAD : IRQ_HANDLED; + /* Unhandled irqs are spurious. */ + if (active_irqs) + DRM_ERROR("Unknown VOP IRQs: %#02x\n", active_irqs); + + return ret; } static int vop_create_crtc(struct vop *vop) @@ -1194,6 +1244,7 @@ static int vop_create_crtc(struct vop *vop) goto err_cleanup_crtc; } + init_completion(&vop->dsp_hold_completion); crtc->port = port; vop->pipe = drm_crtc_index(crtc); rockchip_register_crtc_funcs(drm_dev, &private_crtc_funcs, vop->pipe); -- cgit v1.2.3