Re: [PATCH v4 2/2] drm/v3d: Add support for V3D v4.2.
Dave Emett writes: > On Fri, 8 Mar 2019 at 17:43, Eric Anholt wrote: >> >> No compatible string for it yet, just the version-dependent changes. >> They've now tied the hub and the core interrupt lines into a single >> interrupt line coming out of the block. It also turns out I made a >> mistake in modeling the V3D v3.3 and v4.1 bridge as a part of V3D >> itself -- the bridge is going away in favor of an external reset >> controller in a larger HW module. >> >> v2: Use consistent checks for whether we're on 4.2, and fix a leak in >> an error path. >> v3: Use more general means of determining if the current 4.2 changes >> are in place, as apparently other platforms may switch back (noted >> by Dave). Update the binding doc. >> v4: Improve error handling for IRQ init. >> >> Signed-off-by: Eric Anholt > > Reviewed-by: Dave Emett Pushed to drm-misc-next. Thanks! signature.asc Description: PGP signature
Re: [PATCH v4 2/2] drm/v3d: Add support for V3D v4.2.
On Fri, 8 Mar 2019 at 17:43, Eric Anholt wrote:
>
> No compatible string for it yet, just the version-dependent changes.
> They've now tied the hub and the core interrupt lines into a single
> interrupt line coming out of the block. It also turns out I made a
> mistake in modeling the V3D v3.3 and v4.1 bridge as a part of V3D
> itself -- the bridge is going away in favor of an external reset
> controller in a larger HW module.
>
> v2: Use consistent checks for whether we're on 4.2, and fix a leak in
> an error path.
> v3: Use more general means of determining if the current 4.2 changes
> are in place, as apparently other platforms may switch back (noted
> by Dave). Update the binding doc.
> v4: Improve error handling for IRQ init.
>
> Signed-off-by: Eric Anholt
Reviewed-by: Dave Emett
> ---
> .../devicetree/bindings/gpu/brcm,bcm-v3d.txt | 11 +++--
> drivers/gpu/drm/v3d/v3d_drv.c | 21 +++--
> drivers/gpu/drm/v3d/v3d_drv.h | 2 +
> drivers/gpu/drm/v3d/v3d_gem.c | 12 -
> drivers/gpu/drm/v3d/v3d_irq.c | 45 ++-
> 5 files changed, 71 insertions(+), 20 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/gpu/brcm,bcm-v3d.txt
> b/Documentation/devicetree/bindings/gpu/brcm,bcm-v3d.txt
> index c907aa8dd755..b2df82b44625 100644
> --- a/Documentation/devicetree/bindings/gpu/brcm,bcm-v3d.txt
> +++ b/Documentation/devicetree/bindings/gpu/brcm,bcm-v3d.txt
> @@ -6,15 +6,20 @@ For V3D 2.x, see brcm,bcm-vc4.txt.
> Required properties:
> - compatible: Should be "brcm,7268-v3d" or "brcm,7278-v3d"
> - reg: Physical base addresses and lengths of the register areas
> -- reg-names: Names for the register areas. The "hub", "bridge", and
> "core0"
> +- reg-names: Names for the register areas. The "hub" and "core0"
> register areas are always required. The "gca" register area
> - is required if the GCA cache controller is present.
> + is required if the GCA cache controller is present. The
> + "bridge" register area is required if an external reset
> + controller is not present.
> - interrupts: The interrupt numbers. The first interrupt is for the hub,
> - while the following interrupts are for the cores.
> + while the following interrupts are separate interrupt lines
> + for the cores (if they don't share the hub's interrupt).
> See bindings/interrupt-controller/interrupts.txt
>
> Optional properties:
> - clocks: The core clock the unit runs on
> +- resets: The reset line for v3d, if not using a mapping of the bridge
> + See bindings/reset/reset.txt
>
> v3d {
> compatible = "brcm,7268-v3d";
> diff --git a/drivers/gpu/drm/v3d/v3d_drv.c b/drivers/gpu/drm/v3d/v3d_drv.c
> index f9906cac7a88..89b7567d550f 100644
> --- a/drivers/gpu/drm/v3d/v3d_drv.c
> +++ b/drivers/gpu/drm/v3d/v3d_drv.c
> @@ -19,6 +19,7 @@
> #include
> #include
> #include
> +#include
> #include
> #include
>
> @@ -264,10 +265,6 @@ static int v3d_platform_drm_probe(struct platform_device
> *pdev)
> v3d->pdev = pdev;
> drm = &v3d->drm;
>
> - ret = map_regs(v3d, &v3d->bridge_regs, "bridge");
> - if (ret)
> - goto dev_free;
> -
> ret = map_regs(v3d, &v3d->hub_regs, "hub");
> if (ret)
> goto dev_free;
> @@ -282,6 +279,22 @@ static int v3d_platform_drm_probe(struct platform_device
> *pdev)
> v3d->cores = V3D_GET_FIELD(ident1, V3D_HUB_IDENT1_NCORES);
> WARN_ON(v3d->cores > 1); /* multicore not yet implemented */
>
> + v3d->reset = devm_reset_control_get_exclusive(dev, NULL);
> + if (IS_ERR(v3d->reset)) {
> + ret = PTR_ERR(v3d->reset);
> +
> + if (ret == -EPROBE_DEFER)
> + goto dev_free;
> +
> + v3d->reset = NULL;
> + ret = map_regs(v3d, &v3d->bridge_regs, "bridge");
> + if (ret) {
> + dev_err(dev,
> + "Failed to get reset control or bridge
> regs\n");
> + goto dev_free;
> + }
> + }
> +
> if (v3d->ver < 41) {
> ret = map_regs(v3d, &v3d->gca_regs, "gca");
> if (ret)
> diff --git a/drivers/gpu/drm/v3d/v3d_drv.h b/drivers/gpu/drm/v3d/v3d_drv.h
> index bb58ecb9d9c5..b5efac7894ca 100644
> --- a/drivers/gpu/drm/v3d/v3d_drv.h
> +++ b/drivers/gpu/drm/v3d/v3d_drv.h
> @@ -33,6 +33,7 @@ struct v3d_dev {
> * and revision.
> */
> int ver;
> + bool single_irq_line;
>
> struct device *dev;
> struct platform_device *pdev;
> @@ -41,6 +42,7 @@ struct v3d_dev {
> void __iomem *bridge_regs;
> void __iomem *gca_regs;
> struct clk *clk;
> + struct reset_contro
[PATCH v4 2/2] drm/v3d: Add support for V3D v4.2.
No compatible string for it yet, just the version-dependent changes.
They've now tied the hub and the core interrupt lines into a single
interrupt line coming out of the block. It also turns out I made a
mistake in modeling the V3D v3.3 and v4.1 bridge as a part of V3D
itself -- the bridge is going away in favor of an external reset
controller in a larger HW module.
v2: Use consistent checks for whether we're on 4.2, and fix a leak in
an error path.
v3: Use more general means of determining if the current 4.2 changes
are in place, as apparently other platforms may switch back (noted
by Dave). Update the binding doc.
v4: Improve error handling for IRQ init.
Signed-off-by: Eric Anholt
---
.../devicetree/bindings/gpu/brcm,bcm-v3d.txt | 11 +++--
drivers/gpu/drm/v3d/v3d_drv.c | 21 +++--
drivers/gpu/drm/v3d/v3d_drv.h | 2 +
drivers/gpu/drm/v3d/v3d_gem.c | 12 -
drivers/gpu/drm/v3d/v3d_irq.c | 45 ++-
5 files changed, 71 insertions(+), 20 deletions(-)
diff --git a/Documentation/devicetree/bindings/gpu/brcm,bcm-v3d.txt
b/Documentation/devicetree/bindings/gpu/brcm,bcm-v3d.txt
index c907aa8dd755..b2df82b44625 100644
--- a/Documentation/devicetree/bindings/gpu/brcm,bcm-v3d.txt
+++ b/Documentation/devicetree/bindings/gpu/brcm,bcm-v3d.txt
@@ -6,15 +6,20 @@ For V3D 2.x, see brcm,bcm-vc4.txt.
Required properties:
- compatible: Should be "brcm,7268-v3d" or "brcm,7278-v3d"
- reg: Physical base addresses and lengths of the register areas
-- reg-names: Names for the register areas. The "hub", "bridge", and "core0"
+- reg-names: Names for the register areas. The "hub" and "core0"
register areas are always required. The "gca" register area
- is required if the GCA cache controller is present.
+ is required if the GCA cache controller is present. The
+ "bridge" register area is required if an external reset
+ controller is not present.
- interrupts: The interrupt numbers. The first interrupt is for the hub,
- while the following interrupts are for the cores.
+ while the following interrupts are separate interrupt lines
+ for the cores (if they don't share the hub's interrupt).
See bindings/interrupt-controller/interrupts.txt
Optional properties:
- clocks: The core clock the unit runs on
+- resets: The reset line for v3d, if not using a mapping of the bridge
+ See bindings/reset/reset.txt
v3d {
compatible = "brcm,7268-v3d";
diff --git a/drivers/gpu/drm/v3d/v3d_drv.c b/drivers/gpu/drm/v3d/v3d_drv.c
index f9906cac7a88..89b7567d550f 100644
--- a/drivers/gpu/drm/v3d/v3d_drv.c
+++ b/drivers/gpu/drm/v3d/v3d_drv.c
@@ -19,6 +19,7 @@
#include
#include
#include
+#include
#include
#include
@@ -264,10 +265,6 @@ static int v3d_platform_drm_probe(struct platform_device
*pdev)
v3d->pdev = pdev;
drm = &v3d->drm;
- ret = map_regs(v3d, &v3d->bridge_regs, "bridge");
- if (ret)
- goto dev_free;
-
ret = map_regs(v3d, &v3d->hub_regs, "hub");
if (ret)
goto dev_free;
@@ -282,6 +279,22 @@ static int v3d_platform_drm_probe(struct platform_device
*pdev)
v3d->cores = V3D_GET_FIELD(ident1, V3D_HUB_IDENT1_NCORES);
WARN_ON(v3d->cores > 1); /* multicore not yet implemented */
+ v3d->reset = devm_reset_control_get_exclusive(dev, NULL);
+ if (IS_ERR(v3d->reset)) {
+ ret = PTR_ERR(v3d->reset);
+
+ if (ret == -EPROBE_DEFER)
+ goto dev_free;
+
+ v3d->reset = NULL;
+ ret = map_regs(v3d, &v3d->bridge_regs, "bridge");
+ if (ret) {
+ dev_err(dev,
+ "Failed to get reset control or bridge regs\n");
+ goto dev_free;
+ }
+ }
+
if (v3d->ver < 41) {
ret = map_regs(v3d, &v3d->gca_regs, "gca");
if (ret)
diff --git a/drivers/gpu/drm/v3d/v3d_drv.h b/drivers/gpu/drm/v3d/v3d_drv.h
index bb58ecb9d9c5..b5efac7894ca 100644
--- a/drivers/gpu/drm/v3d/v3d_drv.h
+++ b/drivers/gpu/drm/v3d/v3d_drv.h
@@ -33,6 +33,7 @@ struct v3d_dev {
* and revision.
*/
int ver;
+ bool single_irq_line;
struct device *dev;
struct platform_device *pdev;
@@ -41,6 +42,7 @@ struct v3d_dev {
void __iomem *bridge_regs;
void __iomem *gca_regs;
struct clk *clk;
+ struct reset_control *reset;
/* Virtual and DMA addresses of the single shared page table. */
volatile u32 *pt;
diff --git a/drivers/gpu/drm/v3d/v3d_gem.c b/drivers/gpu/drm/v3d/v3d_gem.c
index 0a83268dec0c..449d01ea54a0 100644
--- a/drivers/gpu/drm/v3d/v3d_gem.c
+++ b/drivers/gpu/drm/v3d/v3d_gem.c
@@ -6
