[PATCH RFC 04/15] drm/armada: move IRQ handling into CRTC
Russell King
rmk+kernel at arm.linux.org.uk
Sat Jul 5 03:38:12 PDT 2014
Signed-off-by: Russell King <rmk+kernel at arm.linux.org.uk>
---
drivers/gpu/drm/armada/armada_crtc.c | 36 +++++++++++++++++--
drivers/gpu/drm/armada/armada_crtc.h | 4 +--
drivers/gpu/drm/armada/armada_drv.c | 68 +++++-------------------------------
3 files changed, 45 insertions(+), 63 deletions(-)
diff --git a/drivers/gpu/drm/armada/armada_crtc.c b/drivers/gpu/drm/armada/armada_crtc.c
index 81c34f949dfc..9341a94cc906 100644
--- a/drivers/gpu/drm/armada/armada_crtc.c
+++ b/drivers/gpu/drm/armada/armada_crtc.c
@@ -349,7 +349,7 @@ static bool armada_drm_crtc_mode_fixup(struct drm_crtc *crtc,
return true;
}
-void armada_drm_crtc_irq(struct armada_crtc *dcrtc, u32 stat)
+static void armada_drm_crtc_irq(struct armada_crtc *dcrtc, u32 stat)
{
struct armada_vbl_event *e, *n;
void __iomem *base = dcrtc->base;
@@ -410,6 +410,27 @@ void armada_drm_crtc_irq(struct armada_crtc *dcrtc, u32 stat)
}
}
+static irqreturn_t armada_drm_irq(int irq, void *arg)
+{
+ struct armada_crtc *dcrtc = arg;
+ u32 v, stat = readl_relaxed(dcrtc->base + LCD_SPU_IRQ_ISR);
+
+ /*
+ * This is rediculous - rather than writing bits to clear, we
+ * have to set the actual status register value. This is racy.
+ */
+ writel_relaxed(0, dcrtc->base + LCD_SPU_IRQ_ISR);
+
+ /* Mask out those interrupts we haven't enabled */
+ v = stat & dcrtc->irq_ena;
+
+ if (v & (VSYNC_IRQ|GRA_FRAME_IRQ|DUMB_FRAMEDONE)) {
+ armada_drm_crtc_irq(dcrtc, stat);
+ return IRQ_HANDLED;
+ }
+ return IRQ_NONE;
+}
+
/* These are locked by dev->vbl_lock */
void armada_drm_crtc_disable_irq(struct armada_crtc *dcrtc, u32 mask)
{
@@ -888,6 +909,8 @@ static void armada_drm_crtc_destroy(struct drm_crtc *crtc)
if (!IS_ERR(dcrtc->clk))
clk_disable_unprepare(dcrtc->clk);
+ writel_relaxed(0, dcrtc->base + LCD_SPU_IRQ_ENA);
+
kfree(dcrtc);
}
@@ -1028,7 +1051,7 @@ static int armada_drm_crtc_create_properties(struct drm_device *dev)
}
int armada_drm_crtc_create(struct drm_device *dev, unsigned num,
- struct resource *res)
+ struct resource *res, int irq)
{
struct armada_private *priv = dev->dev_private;
struct armada_crtc *dcrtc;
@@ -1074,6 +1097,15 @@ int armada_drm_crtc_create(struct drm_device *dev, unsigned num,
CFG_PDWN64x66, dcrtc->base + LCD_SPU_SRAM_PARA1);
writel_relaxed(0x2032ff81, dcrtc->base + LCD_SPU_DMA_CTRL1);
writel_relaxed(0x00000000, dcrtc->base + LCD_SPU_GRA_OVSA_HPXL_VLN);
+ writel_relaxed(dcrtc->irq_ena, dcrtc->base + LCD_SPU_IRQ_ENA);
+ writel_relaxed(0, dcrtc->base + LCD_SPU_IRQ_ISR);
+
+ ret = devm_request_irq(dev, irq, armada_drm_irq, 0, "armada_drm_crtc",
+ dcrtc);
+ if (ret < 0) {
+ kfree(dcrtc);
+ return ret;
+ }
if (priv->variant->crtc_init) {
ret = priv->variant->crtc_init(dcrtc);
diff --git a/drivers/gpu/drm/armada/armada_crtc.h b/drivers/gpu/drm/armada/armada_crtc.h
index 9c10a07e7492..0e952b271212 100644
--- a/drivers/gpu/drm/armada/armada_crtc.h
+++ b/drivers/gpu/drm/armada/armada_crtc.h
@@ -72,10 +72,10 @@ struct armada_crtc {
};
#define drm_to_armada_crtc(c) container_of(c, struct armada_crtc, crtc)
-int armada_drm_crtc_create(struct drm_device *, unsigned, struct resource *);
+int armada_drm_crtc_create(struct drm_device *, unsigned, struct resource *,
+ int);
void armada_drm_crtc_gamma_set(struct drm_crtc *, u16, u16, u16, int);
void armada_drm_crtc_gamma_get(struct drm_crtc *, u16 *, u16 *, u16 *, int);
-void armada_drm_crtc_irq(struct armada_crtc *, u32);
void armada_drm_crtc_disable_irq(struct armada_crtc *, u32);
void armada_drm_crtc_enable_irq(struct armada_crtc *, u32);
void armada_drm_crtc_update_regs(struct armada_crtc *, struct armada_regs *);
diff --git a/drivers/gpu/drm/armada/armada_drv.c b/drivers/gpu/drm/armada/armada_drv.c
index 8ab3cd1a8cdb..58884d807e6c 100644
--- a/drivers/gpu/drm/armada/armada_drv.c
+++ b/drivers/gpu/drm/armada/armada_drv.c
@@ -155,10 +155,16 @@ static int armada_drm_load(struct drm_device *dev, unsigned long flags)
/* Create all LCD controllers */
for (n = 0; n < ARRAY_SIZE(priv->dcrtc); n++) {
+ int irq;
+
if (!res[n])
break;
- ret = armada_drm_crtc_create(dev, n, res[n]);
+ irq = platform_get_irq(dev->platformdev, n);
+ if (irq < 0)
+ goto err_kms;
+
+ ret = armada_drm_crtc_create(dev, n, res[n], irq);
if (ret)
goto err_kms;
}
@@ -173,22 +179,16 @@ static int armada_drm_load(struct drm_device *dev, unsigned long flags)
if (ret)
goto err_kms;
- ret = drm_irq_install(dev, platform_get_irq(dev->platformdev, 0));
- if (ret)
- goto err_kms;
-
dev->vblank_disable_allowed = 1;
ret = armada_fbdev_init(dev);
if (ret)
- goto err_irq;
+ goto err_kms;
drm_kms_helper_poll_init(dev);
return 0;
- err_irq:
- drm_irq_uninstall(dev);
err_kms:
drm_mode_config_cleanup(dev);
drm_mm_takedown(&priv->linear);
@@ -203,7 +203,6 @@ static int armada_drm_unload(struct drm_device *dev)
drm_kms_helper_poll_fini(dev);
armada_fbdev_fini(dev);
- drm_irq_uninstall(dev);
drm_mode_config_cleanup(dev);
drm_mm_takedown(&priv->linear);
flush_work(&priv->fb_unref_work);
@@ -259,52 +258,6 @@ static void armada_drm_disable_vblank(struct drm_device *dev, int crtc)
armada_drm_crtc_disable_irq(priv->dcrtc[crtc], VSYNC_IRQ_ENA);
}
-static irqreturn_t armada_drm_irq_handler(int irq, void *arg)
-{
- struct drm_device *dev = arg;
- struct armada_private *priv = dev->dev_private;
- struct armada_crtc *dcrtc = priv->dcrtc[0];
- uint32_t v, stat = readl_relaxed(dcrtc->base + LCD_SPU_IRQ_ISR);
- irqreturn_t handled = IRQ_NONE;
-
- /*
- * This is rediculous - rather than writing bits to clear, we
- * have to set the actual status register value. This is racy.
- */
- writel_relaxed(0, dcrtc->base + LCD_SPU_IRQ_ISR);
-
- /* Mask out those interrupts we haven't enabled */
- v = stat & dcrtc->irq_ena;
-
- if (v & (VSYNC_IRQ|GRA_FRAME_IRQ|DUMB_FRAMEDONE)) {
- armada_drm_crtc_irq(dcrtc, stat);
- handled = IRQ_HANDLED;
- }
-
- return handled;
-}
-
-static int armada_drm_irq_postinstall(struct drm_device *dev)
-{
- struct armada_private *priv = dev->dev_private;
- struct armada_crtc *dcrtc = priv->dcrtc[0];
-
- spin_lock_irq(&dev->vbl_lock);
- writel_relaxed(dcrtc->irq_ena, dcrtc->base + LCD_SPU_IRQ_ENA);
- writel(0, dcrtc->base + LCD_SPU_IRQ_ISR);
- spin_unlock_irq(&dev->vbl_lock);
-
- return 0;
-}
-
-static void armada_drm_irq_uninstall(struct drm_device *dev)
-{
- struct armada_private *priv = dev->dev_private;
- struct armada_crtc *dcrtc = priv->dcrtc[0];
-
- writel(0, dcrtc->base + LCD_SPU_IRQ_ENA);
-}
-
static struct drm_ioctl_desc armada_ioctls[] = {
DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE, armada_gem_create_ioctl,
DRM_UNLOCKED),
@@ -340,9 +293,6 @@ static struct drm_driver armada_drm_driver = {
.get_vblank_counter = drm_vblank_count,
.enable_vblank = armada_drm_enable_vblank,
.disable_vblank = armada_drm_disable_vblank,
- .irq_handler = armada_drm_irq_handler,
- .irq_postinstall = armada_drm_irq_postinstall,
- .irq_uninstall = armada_drm_irq_uninstall,
#ifdef CONFIG_DEBUG_FS
.debugfs_init = armada_drm_debugfs_init,
.debugfs_cleanup = armada_drm_debugfs_cleanup,
@@ -362,7 +312,7 @@ static struct drm_driver armada_drm_driver = {
.desc = "Armada SoC DRM",
.date = "20120730",
.driver_features = DRIVER_GEM | DRIVER_MODESET |
- DRIVER_HAVE_IRQ | DRIVER_PRIME,
+ DRIVER_PRIME,
.ioctls = armada_ioctls,
.fops = &armada_drm_fops,
};
--
1.8.3.1
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