Merge branch 'pruss-fix' into fixes

Merge in a fix for pruss reset issue caused by enabling pruss for am335x.

4 files changed, 56 insertions, 13 deletions

diff --git a/drivers/gpu/drm/kmb/kmb_drv.c b/drivers/gpu/drm/kmb/kmb_drv.c
index 96ea1a2c11dd..1c2f4799f421 100644
--- a/drivers/gpu/drm/kmb/kmb_drv.c
+++ b/drivers/gpu/drm/kmb/kmb_drv.c
@@ -17,7 +17,6 @@
 #include <drm/drm_drv.h>
 #include <drm/drm_gem_cma_helper.h>
 #include <drm/drm_gem_framebuffer_helper.h>
-#include <drm/drm_irq.h>
 #include <drm/drm_probe_helper.h>
 #include <drm/drm_vblank.h>
 
@@ -203,6 +202,7 @@ static irqreturn_t handle_lcd_irq(struct drm_device *dev)
 	unsigned long status, val, val1;
 	int plane_id, dma0_state, dma1_state;
 	struct kmb_drm_private *kmb = to_kmb(dev);
+	u32 ctrl = 0;
 
 	status = kmb_read_lcd(kmb, LCD_INT_STATUS);
 
@@ -227,6 +227,19 @@ static irqreturn_t handle_lcd_irq(struct drm_device *dev)
 				kmb_clr_bitmask_lcd(kmb, LCD_CONTROL,
 						    kmb->plane_status[plane_id].ctrl);
 
+				ctrl = kmb_read_lcd(kmb, LCD_CONTROL);
+				if (!(ctrl & (LCD_CTRL_VL1_ENABLE |
+				    LCD_CTRL_VL2_ENABLE |
+				    LCD_CTRL_GL1_ENABLE |
+				    LCD_CTRL_GL2_ENABLE))) {
+					/* If no LCD layers are using DMA,
+					 * then disable DMA pipelined AXI read
+					 * transactions.
+					 */
+					kmb_clr_bitmask_lcd(kmb, LCD_CONTROL,
+							    LCD_CTRL_PIPELINE_DMA);
+				}
+
 				kmb->plane_status[plane_id].disable = false;
 			}
 		}
@@ -399,22 +412,37 @@ static void kmb_irq_reset(struct drm_device *drm)
 	kmb_write_lcd(to_kmb(drm), LCD_INT_ENABLE, 0);
 }
 
+static int kmb_irq_install(struct drm_device *drm, unsigned int irq)
+{
+	if (irq == IRQ_NOTCONNECTED)
+		return -ENOTCONN;
+
+	kmb_irq_reset(drm);
+
+	return request_irq(irq, kmb_isr, 0, drm->driver->name, drm);
+}
+
+static void kmb_irq_uninstall(struct drm_device *drm)
+{
+	struct kmb_drm_private *kmb = to_kmb(drm);
+
+	kmb_irq_reset(drm);
+	free_irq(kmb->irq_lcd, drm);
+}
+
 DEFINE_DRM_GEM_CMA_FOPS(fops);
 
 static const struct drm_driver kmb_driver = {
 	.driver_features = DRIVER_GEM |
 	    DRIVER_MODESET | DRIVER_ATOMIC,
-	.irq_handler = kmb_isr,
-	.irq_preinstall = kmb_irq_reset,
-	.irq_uninstall = kmb_irq_reset,
 	/* GEM Operations */
 	.fops = &fops,
 	DRM_GEM_CMA_DRIVER_OPS_VMAP,
 	.name = "kmb-drm",
-	.desc = "KEEMBAY DISPLAY DRIVER ",
-	.date = "20201008",
-	.major = 1,
-	.minor = 0,
+	.desc = "KEEMBAY DISPLAY DRIVER",
+	.date = DRIVER_DATE,
+	.major = DRIVER_MAJOR,
+	.minor = DRIVER_MINOR,
 };
 
 static int kmb_remove(struct platform_device *pdev)
@@ -428,7 +456,7 @@ static int kmb_remove(struct platform_device *pdev)
 	of_node_put(kmb->crtc.port);
 	kmb->crtc.port = NULL;
 	pm_runtime_get_sync(drm->dev);
-	drm_irq_uninstall(drm);
+	kmb_irq_uninstall(drm);
 	pm_runtime_put_sync(drm->dev);
 	pm_runtime_disable(drm->dev);
 
@@ -518,7 +546,7 @@ static int kmb_probe(struct platform_device *pdev)
 	if (ret)
 		goto err_free;
 
-	ret = drm_irq_install(&kmb->drm, kmb->irq_lcd);
+	ret = kmb_irq_install(&kmb->drm, kmb->irq_lcd);
 	if (ret < 0) {
 		drm_err(&kmb->drm, "failed to install IRQ handler\n");
 		goto err_irq;
diff --git a/drivers/gpu/drm/kmb/kmb_drv.h b/drivers/gpu/drm/kmb/kmb_drv.h
index 02e806712a64..ebbaa5f422d5 100644
--- a/drivers/gpu/drm/kmb/kmb_drv.h
+++ b/drivers/gpu/drm/kmb/kmb_drv.h
@@ -15,6 +15,11 @@
 #define KMB_MAX_HEIGHT			1080 /*Max height in pixels */
 #define KMB_MIN_WIDTH                   1920 /*Max width in pixels */
 #define KMB_MIN_HEIGHT                  1080 /*Max height in pixels */
+
+#define DRIVER_DATE			"20210223"
+#define DRIVER_MAJOR			1
+#define DRIVER_MINOR			1
+
 #define KMB_LCD_DEFAULT_CLK		200000000
 #define KMB_SYS_CLK_MHZ			500
 
diff --git a/drivers/gpu/drm/kmb/kmb_dsi.c b/drivers/gpu/drm/kmb/kmb_dsi.c
index 231041b269f5..1793cd31b117 100644
--- a/drivers/gpu/drm/kmb/kmb_dsi.c
+++ b/drivers/gpu/drm/kmb/kmb_dsi.c
@@ -1441,7 +1441,6 @@ int kmb_dsi_encoder_init(struct drm_device *dev, struct kmb_dsi *kmb_dsi)
 	ret = drm_bridge_attach(encoder, adv_bridge, NULL,
 				DRM_BRIDGE_ATTACH_NO_CONNECTOR);
 	if (ret) {
-		DRM_ERROR("failed to attach bridge to MIPI\n");
 		drm_encoder_cleanup(encoder);
 		return ret;
 	}
diff --git a/drivers/gpu/drm/kmb/kmb_plane.c b/drivers/gpu/drm/kmb/kmb_plane.c
index d5b6195856d1..ecee6782612d 100644
--- a/drivers/gpu/drm/kmb/kmb_plane.c
+++ b/drivers/gpu/drm/kmb/kmb_plane.c
@@ -427,8 +427,14 @@ static void kmb_plane_atomic_update(struct drm_plane *plane,
 
 	kmb_set_bitmask_lcd(kmb, LCD_CONTROL, ctrl);
 
-	/* FIXME no doc on how to set output format,these values are
-	 * taken from the Myriadx tests
+	/* Enable pipeline AXI read transactions for the DMA
+	 * after setting graphics layers. This must be done
+	 * in a separate write cycle.
+	 */
+	kmb_set_bitmask_lcd(kmb, LCD_CONTROL, LCD_CTRL_PIPELINE_DMA);
+
+	/* FIXME no doc on how to set output format, these values are taken
+	 * from the Myriadx tests
 	 */
 	out_format |= LCD_OUTF_FORMAT_RGB888;
 
@@ -526,6 +532,11 @@ struct kmb_plane *kmb_plane_init(struct drm_device *drm)
 		plane->id = i;
 	}
 
+	/* Disable pipeline AXI read transactions for the DMA
+	 * prior to setting graphics layers
+	 */
+	kmb_clr_bitmask_lcd(kmb, LCD_CONTROL, LCD_CTRL_PIPELINE_DMA);
+
 	return primary;
 cleanup:
 	drmm_kfree(drm, plane);