Dispatch DRM pending events from crtc_atomic_flush() and not from the IRQ handler.
Don't disable the vsync interrupt, as the hardware lacks hardware counters for vsync time stamping.
Signed-off-by: Liviu Dudau Liviu.Dudau@arm.com ---
This replaces the previous patch "drm: hdlcd: Replace the mode config's atomic_commit with the proper implementation." and removes the in-house async implementation for atomic commit.
drivers/gpu/drm/arm/hdlcd_crtc.c | 64 +++++++++++++++++++++++++++------------- drivers/gpu/drm/arm/hdlcd_drv.c | 42 ++++++-------------------- drivers/gpu/drm/arm/hdlcd_drv.h | 1 - 3 files changed, 53 insertions(+), 54 deletions(-)
diff --git a/drivers/gpu/drm/arm/hdlcd_crtc.c b/drivers/gpu/drm/arm/hdlcd_crtc.c index d1e8d31..523890d 100644 --- a/drivers/gpu/drm/arm/hdlcd_crtc.c +++ b/drivers/gpu/drm/arm/hdlcd_crtc.c @@ -106,7 +106,7 @@ static void hdlcd_crtc_mode_set_nofb(struct drm_crtc *crtc) struct hdlcd_drm_private *hdlcd = crtc_to_hdlcd_priv(crtc); struct drm_display_mode *m = &crtc->state->adjusted_mode; struct videomode vm; - unsigned int polarities, line_length, err; + unsigned int polarities, err;
vm.vfront_porch = m->crtc_vsync_start - m->crtc_vdisplay; vm.vback_porch = m->crtc_vtotal - m->crtc_vsync_end; @@ -122,23 +122,18 @@ static void hdlcd_crtc_mode_set_nofb(struct drm_crtc *crtc) if (m->flags & DRM_MODE_FLAG_PVSYNC) polarities |= HDLCD_POLARITY_VSYNC;
- line_length = crtc->primary->state->fb->pitches[0]; - /* Allow max number of outstanding requests and largest burst size */ hdlcd_write(hdlcd, HDLCD_REG_BUS_OPTIONS, HDLCD_BUS_MAX_OUTSTAND | HDLCD_BUS_BURST_16);
- hdlcd_write(hdlcd, HDLCD_REG_FB_LINE_LENGTH, line_length); - hdlcd_write(hdlcd, HDLCD_REG_FB_LINE_PITCH, line_length); - hdlcd_write(hdlcd, HDLCD_REG_FB_LINE_COUNT, m->crtc_vdisplay - 1); hdlcd_write(hdlcd, HDLCD_REG_V_DATA, m->crtc_vdisplay - 1); hdlcd_write(hdlcd, HDLCD_REG_V_BACK_PORCH, vm.vback_porch - 1); hdlcd_write(hdlcd, HDLCD_REG_V_FRONT_PORCH, vm.vfront_porch - 1); hdlcd_write(hdlcd, HDLCD_REG_V_SYNC, vm.vsync_len - 1); + hdlcd_write(hdlcd, HDLCD_REG_H_DATA, m->crtc_hdisplay - 1); hdlcd_write(hdlcd, HDLCD_REG_H_BACK_PORCH, vm.hback_porch - 1); hdlcd_write(hdlcd, HDLCD_REG_H_FRONT_PORCH, vm.hfront_porch - 1); hdlcd_write(hdlcd, HDLCD_REG_H_SYNC, vm.hsync_len - 1); - hdlcd_write(hdlcd, HDLCD_REG_H_DATA, m->crtc_hdisplay - 1); hdlcd_write(hdlcd, HDLCD_REG_POLARITIES, polarities);
err = hdlcd_set_pxl_fmt(crtc); @@ -153,20 +148,19 @@ static void hdlcd_crtc_enable(struct drm_crtc *crtc) struct hdlcd_drm_private *hdlcd = crtc_to_hdlcd_priv(crtc);
clk_prepare_enable(hdlcd->clk); + hdlcd_crtc_mode_set_nofb(crtc); hdlcd_write(hdlcd, HDLCD_REG_COMMAND, 1); - drm_crtc_vblank_on(crtc); }
static void hdlcd_crtc_disable(struct drm_crtc *crtc) { struct hdlcd_drm_private *hdlcd = crtc_to_hdlcd_priv(crtc);
- if (!crtc->primary->fb) + if (!crtc->state->active) return;
hdlcd_write(hdlcd, HDLCD_REG_COMMAND, 0); clk_disable_unprepare(hdlcd->clk); - drm_crtc_vblank_off(crtc); }
static int hdlcd_crtc_atomic_check(struct drm_crtc *crtc, @@ -208,6 +202,21 @@ static void hdlcd_crtc_atomic_begin(struct drm_crtc *crtc, static void hdlcd_crtc_atomic_flush(struct drm_crtc *crtc, struct drm_crtc_state *state) { + struct hdlcd_drm_private *hdlcd = crtc_to_hdlcd_priv(crtc); + struct drm_device *drm = crtc->dev; + unsigned long flags; + struct drm_pending_vblank_event *e; + + spin_lock_irqsave(&drm->event_lock, flags); + e = list_first_entry_or_null(&hdlcd->event_list, typeof(*e), base.link); + + if (e) { + list_del(&e->base.link); + drm_crtc_send_vblank_event(&hdlcd->crtc, e); + drm_crtc_vblank_put(&hdlcd->crtc); + } + + spin_unlock_irqrestore(&drm->event_lock, flags); }
static bool hdlcd_crtc_mode_fixup(struct drm_crtc *crtc, @@ -219,13 +228,8 @@ static bool hdlcd_crtc_mode_fixup(struct drm_crtc *crtc,
static const struct drm_crtc_helper_funcs hdlcd_crtc_helper_funcs = { .mode_fixup = hdlcd_crtc_mode_fixup, - .mode_set = drm_helper_crtc_mode_set, - .mode_set_base = drm_helper_crtc_mode_set_base, - .mode_set_nofb = hdlcd_crtc_mode_set_nofb, .enable = hdlcd_crtc_enable, .disable = hdlcd_crtc_disable, - .prepare = hdlcd_crtc_disable, - .commit = hdlcd_crtc_enable, .atomic_check = hdlcd_crtc_atomic_check, .atomic_begin = hdlcd_crtc_atomic_begin, .atomic_flush = hdlcd_crtc_atomic_flush, @@ -234,6 +238,15 @@ static const struct drm_crtc_helper_funcs hdlcd_crtc_helper_funcs = { static int hdlcd_plane_atomic_check(struct drm_plane *plane, struct drm_plane_state *state) { + u32 src_w, src_h; + + src_w = state->src_w >> 16; + src_h = state->src_h >> 16; + + /* we can't do any scaling of the plane source */ + if ((src_w != state->crtc_w) || (src_h != state->crtc_h)) + return -EINVAL; + return 0; }
@@ -242,20 +255,31 @@ static void hdlcd_plane_atomic_update(struct drm_plane *plane, { struct hdlcd_drm_private *hdlcd; struct drm_gem_cma_object *gem; + unsigned int depth, bpp; + u32 src_w, src_h, dest_w, dest_h; dma_addr_t scanout_start;
- if (!plane->state->crtc || !plane->state->fb) + if (!plane->state->fb) return;
- hdlcd = crtc_to_hdlcd_priv(plane->state->crtc); + drm_fb_get_bpp_depth(plane->state->fb->pixel_format, &depth, &bpp); + src_w = plane->state->src_w >> 16; + src_h = plane->state->src_h >> 16; + dest_w = plane->state->crtc_w; + dest_h = plane->state->crtc_h; gem = drm_fb_cma_get_gem_obj(plane->state->fb, 0); - scanout_start = gem->paddr; + scanout_start = gem->paddr + plane->state->fb->offsets[0] + + plane->state->crtc_y * plane->state->fb->pitches[0] + + plane->state->crtc_x * bpp / 8; + + hdlcd = plane->dev->dev_private; + hdlcd_write(hdlcd, HDLCD_REG_FB_LINE_LENGTH, plane->state->fb->pitches[0]); + hdlcd_write(hdlcd, HDLCD_REG_FB_LINE_PITCH, plane->state->fb->pitches[0]); + hdlcd_write(hdlcd, HDLCD_REG_FB_LINE_COUNT, dest_h - 1); hdlcd_write(hdlcd, HDLCD_REG_FB_BASE, scanout_start); }
static const struct drm_plane_helper_funcs hdlcd_plane_helper_funcs = { - .prepare_fb = NULL, - .cleanup_fb = NULL, .atomic_check = hdlcd_plane_atomic_check, .atomic_update = hdlcd_plane_atomic_update, }; diff --git a/drivers/gpu/drm/arm/hdlcd_drv.c b/drivers/gpu/drm/arm/hdlcd_drv.c index 21b1427..b50e9d9 100644 --- a/drivers/gpu/drm/arm/hdlcd_drv.c +++ b/drivers/gpu/drm/arm/hdlcd_drv.c @@ -19,6 +19,7 @@ #include <linux/pm_runtime.h>
#include <drm/drmP.h> +#include <drm/drm_atomic.h> #include <drm/drm_atomic_helper.h> #include <drm/drm_crtc.h> #include <drm/drm_crtc_helper.h> @@ -108,17 +109,11 @@ static void hdlcd_fb_output_poll_changed(struct drm_device *drm) drm_fbdev_cma_hotplug_event(hdlcd->fbdev); }
-static int hdlcd_atomic_commit(struct drm_device *dev, - struct drm_atomic_state *state, bool nonblock) -{ - return drm_atomic_helper_commit(dev, state, false); -} - static const struct drm_mode_config_funcs hdlcd_mode_config_funcs = { .fb_create = drm_fb_cma_create, .output_poll_changed = hdlcd_fb_output_poll_changed, .atomic_check = drm_atomic_helper_check, - .atomic_commit = hdlcd_atomic_commit, + .atomic_commit = drm_atomic_helper_commit, };
static void hdlcd_setup_mode_config(struct drm_device *drm) @@ -160,24 +155,9 @@ static irqreturn_t hdlcd_irq(int irq, void *arg) atomic_inc(&hdlcd->vsync_count);
#endif - if (irq_status & HDLCD_INTERRUPT_VSYNC) { - bool events_sent = false; - unsigned long flags; - struct drm_pending_vblank_event *e, *t; - + if (irq_status & HDLCD_INTERRUPT_VSYNC) drm_crtc_handle_vblank(&hdlcd->crtc);
- spin_lock_irqsave(&drm->event_lock, flags); - list_for_each_entry_safe(e, t, &hdlcd->event_list, base.link) { - list_del(&e->base.link); - drm_crtc_send_vblank_event(&hdlcd->crtc, e); - events_sent = true; - } - if (events_sent) - drm_crtc_vblank_put(&hdlcd->crtc); - spin_unlock_irqrestore(&drm->event_lock, flags); - } - /* acknowledge interrupt(s) */ hdlcd_write(hdlcd, HDLCD_REG_INT_CLEAR, irq_status);
@@ -200,9 +180,13 @@ static int hdlcd_irq_postinstall(struct drm_device *drm)
/* enable debug interrupts */ irq_mask |= HDLCD_DEBUG_INT_MASK; +#endif + + /* enable vsync interrupts */ + irq_mask |= HDLCD_INTERRUPT_VSYNC;
hdlcd_write(hdlcd, HDLCD_REG_INT_MASK, irq_mask); -#endif + return 0; }
@@ -225,20 +209,11 @@ static void hdlcd_irq_uninstall(struct drm_device *drm)
static int hdlcd_enable_vblank(struct drm_device *drm, unsigned int crtc) { - struct hdlcd_drm_private *hdlcd = drm->dev_private; - unsigned int mask = hdlcd_read(hdlcd, HDLCD_REG_INT_MASK); - - hdlcd_write(hdlcd, HDLCD_REG_INT_MASK, mask | HDLCD_INTERRUPT_VSYNC); - return 0; }
static void hdlcd_disable_vblank(struct drm_device *drm, unsigned int crtc) { - struct hdlcd_drm_private *hdlcd = drm->dev_private; - unsigned int mask = hdlcd_read(hdlcd, HDLCD_REG_INT_MASK); - - hdlcd_write(hdlcd, HDLCD_REG_INT_MASK, mask & ~HDLCD_INTERRUPT_VSYNC); }
#ifdef CONFIG_DEBUG_FS @@ -271,6 +246,7 @@ static int hdlcd_show_pxlclock(struct seq_file *m, void *arg) static struct drm_info_list hdlcd_debugfs_list[] = { { "interrupt_count", hdlcd_show_underrun_count, 0 }, { "clocks", hdlcd_show_pxlclock, 0 }, + { "fb", drm_fb_cma_debugfs_show, 0 }, };
static int hdlcd_debugfs_init(struct drm_minor *minor) diff --git a/drivers/gpu/drm/arm/hdlcd_drv.h b/drivers/gpu/drm/arm/hdlcd_drv.h index e7cea82..da7c315 100644 --- a/drivers/gpu/drm/arm/hdlcd_drv.h +++ b/drivers/gpu/drm/arm/hdlcd_drv.h @@ -9,7 +9,6 @@ struct hdlcd_drm_private { void __iomem *mmio; struct clk *clk; struct drm_fbdev_cma *fbdev; - struct drm_framebuffer *fb; struct list_head event_list; struct drm_crtc crtc; struct drm_plane *plane;