[RFC] drm/msm: use componentised device support
Rob Clark
robdclark at gmail.com
Mon Mar 3 15:27:08 PST 2014
Hey Russell,
Here is a early/rough pass at conversion to componentized device support.
I was hoping you could have a quick look at this to make sure I'm on the
right track, since there were no non-DT examples for me to look at ;-)
I still haven't gotten rid of the global hdmi_pdev and a3xx_pdev ptrs. I
am not entirely sure how to find those subordinate device pointers again
without DT/phandle stuff. I think I might need something like:
struct device *component_find(struct device *dev, const char *name)
{
struct master *master;
struct component *c;
struct device *component = NULL;
mutex_lock(&component_mutex);
master = __master_find(dev, NULL);
if (master) {
list_for_each_entry(c, &master->components, master_node) {
if (!strcmp(name, dev_name(c->dev))) {
/* maybe take a ref to the device? */
component = c->dev;
break;
}
}
}
mutex_unlock(&component_mutex);
return component;
}
or I could probably hack around it somehow in msm.. I suppose I'm the only
one who still has to care for a bit longer about componentized + !DT.
Also still need to remove the extra MODULE_DEVICE_TABLE()'s for DT case
and few other little things.
---
drivers/gpu/drm/msm/adreno/a3xx_gpu.c | 34 ++++++---
drivers/gpu/drm/msm/hdmi/hdmi.c | 38 +++++++---
drivers/gpu/drm/msm/msm_drv.c | 128 +++++++++++++++++++++++++++++++++-
drivers/gpu/drm/msm/msm_drv.h | 1 +
4 files changed, 179 insertions(+), 22 deletions(-)
diff --git a/drivers/gpu/drm/msm/adreno/a3xx_gpu.c b/drivers/gpu/drm/msm/adreno/a3xx_gpu.c
index e6cb2bc..1f0bbf7 100644
--- a/drivers/gpu/drm/msm/adreno/a3xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a3xx_gpu.c
@@ -556,17 +556,17 @@ fail:
# include <mach/kgsl.h>
#endif
-static int a3xx_probe(struct platform_device *pdev)
+static int a3xx_bind(struct device *dev, struct device *master, void *data)
{
static struct adreno_platform_config config = {};
#ifdef CONFIG_OF
- struct device_node *child, *node = pdev->dev.of_node;
+ struct device_node *child, *node = dev->of_node;
u32 val;
int ret;
ret = of_property_read_u32(node, "qcom,chipid", &val);
if (ret) {
- dev_err(&pdev->dev, "could not find chipid: %d\n", ret);
+ dev_err(dev, "could not find chipid: %d\n", ret);
return ret;
}
@@ -582,7 +582,7 @@ static int a3xx_probe(struct platform_device *pdev)
for_each_child_of_node(child, pwrlvl) {
ret = of_property_read_u32(pwrlvl, "qcom,gpu-freq", &val);
if (ret) {
- dev_err(&pdev->dev, "could not find gpu-freq: %d\n", ret);
+ dev_err(dev, "could not find gpu-freq: %d\n", ret);
return ret;
}
config.fast_rate = max(config.fast_rate, val);
@@ -592,12 +592,12 @@ static int a3xx_probe(struct platform_device *pdev)
}
if (!config.fast_rate) {
- dev_err(&pdev->dev, "could not find clk rates\n");
+ dev_err(dev, "could not find clk rates\n");
return -ENXIO;
}
#else
- struct kgsl_device_platform_data *pdata = pdev->dev.platform_data;
+ struct kgsl_device_platform_data *pdata = dev->platform_data;
uint32_t version = socinfo_get_version();
if (cpu_is_apq8064ab()) {
config.fast_rate = 450000000;
@@ -643,14 +643,30 @@ static int a3xx_probe(struct platform_device *pdev)
config.bus_scale_table = pdata->bus_scale_table;
# endif
#endif
- pdev->dev.platform_data = &config;
- a3xx_pdev = pdev;
+ dev->platform_data = &config;
+ a3xx_pdev = to_platform_device(dev);
return 0;
}
-static int a3xx_remove(struct platform_device *pdev)
+static void a3xx_unbind(struct device *dev, struct device *master,
+ void *data)
{
a3xx_pdev = NULL;
+}
+
+static const struct component_ops a3xx_ops = {
+ .bind = a3xx_bind,
+ .unbind = a3xx_unbind,
+};
+
+static int a3xx_probe(struct platform_device *pdev)
+{
+ return component_add(&pdev->dev, &a3xx_ops);
+}
+
+static int a3xx_remove(struct platform_device *pdev)
+{
+ component_del(&pdev->dev, &a3xx_ops);
return 0;
}
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi.c b/drivers/gpu/drm/msm/hdmi/hdmi.c
index b8d902d..71c58b9 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi.c
@@ -255,17 +255,17 @@ fail:
#include <linux/of_gpio.h>
-static int hdmi_dev_probe(struct platform_device *pdev)
+static int hdmi_bind(struct device *dev, struct device *master, void *data)
{
static struct hdmi_platform_config config = {};
#ifdef CONFIG_OF
- struct device_node *of_node = pdev->dev.of_node;
+ struct device_node *of_node = dev->of_node;
int get_gpio(const char *name)
{
int gpio = of_get_named_gpio(of_node, name, 0);
if (gpio < 0) {
- dev_err(&pdev->dev, "failed to get gpio: %s (%d)\n",
+ dev_err(dev, "failed to get gpio: %s (%d)\n",
name, gpio);
gpio = -1;
}
@@ -342,8 +342,30 @@ static int hdmi_dev_probe(struct platform_device *pdev)
config.mux_sel_gpio = -1;
}
#endif
- pdev->dev.platform_data = &config;
- hdmi_pdev = pdev;
+ dev->platform_data = &config;
+ hdmi_pdev = to_platform_device(dev);
+ return 0;
+}
+
+static void hdmi_unbind(struct device *dev, struct device *master,
+ void *data)
+{
+ hdmi_pdev = NULL;
+}
+
+static const struct component_ops hdmi_ops = {
+ .bind = hdmi_bind,
+ .unbind = hdmi_unbind,
+};
+
+static int hdmi_dev_probe(struct platform_device *pdev)
+{
+ return component_add(&pdev->dev, &hdmi_ops);
+}
+
+static int hdmi_dev_remove(struct platform_device *pdev)
+{
+ component_del(&pdev->dev, &hdmi_ops);
return 0;
}
@@ -361,12 +383,6 @@ void hdmi_msm_audio_sample_rate_reset(int rate)
}
EXPORT_SYMBOL(hdmi_msm_audio_sample_rate_reset);
-static int hdmi_dev_remove(struct platform_device *pdev)
-{
- hdmi_pdev = NULL;
- return 0;
-}
-
static const struct of_device_id dt_match[] = {
{ .compatible = "qcom,hdmi-tx" },
{}
diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
index e913efa..0b38be0 100644
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -56,6 +56,10 @@ static char *vram;
MODULE_PARM_DESC(vram, "Configure VRAM size (for devices without IOMMU/GPUMMU");
module_param(vram, charp, 0);
+/*
+ * Util/helpers:
+ */
+
void __iomem *msm_ioremap(struct platform_device *pdev, const char *name,
const char *dbgname)
{
@@ -143,6 +147,8 @@ static int msm_unload(struct drm_device *dev)
priv->vram.paddr, &attrs);
}
+ component_unbind_all(dev->dev, dev);
+
dev->dev_private = NULL;
kfree(priv);
@@ -175,6 +181,11 @@ static int msm_load(struct drm_device *dev, unsigned long flags)
struct msm_kms *kms;
int ret;
+ /* Bind all our sub-components: */
+ ret = component_bind_all(dev->dev, dev);
+ if (ret)
+ return ret;
+
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
if (!priv) {
dev_err(dev->dev, "failed to allocate private data\n");
@@ -824,18 +835,131 @@ static const struct dev_pm_ops msm_pm_ops = {
};
/*
+ * Componentized driver support:
+ */
+
+#ifdef CONFIG_OF
+/* NOTE: the CONFIG_OF case duplicates the same code as exynos or imx
+ * (or probably any other).. so probably some room for some helpers
+ */
+static int compare_parent_of(struct device *dev, void *data)
+{
+ struct of_phandle_args *args = data;
+ return dev->parent && dev->parent->of_node == args->np;
+}
+
+static int compare_of(struct device *dev, void *data)
+{
+ return dev->of_node == data;
+}
+
+static int msm_drm_add_components(struct device *master, struct master *m)
+{
+ struct device_node *np = master->of_node;
+ unsigned i;
+ int ret;
+
+ for (i = 0; ; i++) {
+ struct of_phandle_args args;
+
+ ret = of_parse_phandle_with_fixed_args(np, "crtcs", 1,
+ i, &args);
+ if (ret)
+ break;
+
+ ret = component_master_add_child(m, compare_parent_of, &args);
+ of_node_put(args.np);
+
+ if (ret)
+ return ret;
+ }
+
+ for (i = 0; ; i++) {
+ struct device_node *node;
+
+ node = of_parse_phandle(np, "connectors", i);
+ if (!node)
+ break;
+
+ ret = component_master_add_child(m, compare_of, node);
+ of_node_put(node);
+
+ if (ret)
+ return ret;
+ }
+ return 0;
+}
+#else
+static int compare_dev(struct device *dev, void *data)
+{
+ return dev == data;
+}
+
+static int msm_drm_add_components(struct device *master, struct master *m)
+{
+ /* For non-DT case, it kinda sucks. We don't actually have a way
+ * to know whether or not we are waiting for certain devices (or if
+ * they are simply not present). But for non-DT we only need to
+ * care about apq8064/apq8060/etc (all mdp4/a3xx):
+ */
+ static const char *devnames[] = {
+ "hdmi_msm.0", "kgsl-3d0.0",
+ };
+ int i;
+
+ DBG("Adding components..");
+
+ for (i = 0; i < ARRAY_SIZE(devnames); i++) {
+ struct device *dev;
+ int ret;
+
+ dev = bus_find_device_by_name(&platform_bus_type,
+ NULL, devnames[i]);
+ if (!dev) {
+ dev_info(master, "still waiting for %s\n", devnames[i]);
+ return -EPROBE_DEFER;
+ }
+
+ ret = component_master_add_child(m, compare_dev, dev);
+ if (ret) {
+ DBG("could not add child: %d", ret);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+#endif
+
+static int msm_drm_bind(struct device *dev)
+{
+ return drm_platform_init(&msm_driver, to_platform_device(dev));
+}
+
+static void msm_drm_unbind(struct device *dev)
+{
+ drm_put_dev(platform_get_drvdata(to_platform_device(dev)));
+}
+
+static const struct component_master_ops msm_drm_ops = {
+ .add_components = msm_drm_add_components,
+ .bind = msm_drm_bind,
+ .unbind = msm_drm_unbind,
+};
+
+/*
* Platform driver:
*/
static int msm_pdev_probe(struct platform_device *pdev)
{
pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
- return drm_platform_init(&msm_driver, pdev);
+ return component_master_add(&pdev->dev, &msm_drm_ops);
}
static int msm_pdev_remove(struct platform_device *pdev)
{
- drm_put_dev(platform_get_drvdata(pdev));
+ component_master_del(&pdev->dev, &msm_drm_ops);
return 0;
}
diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
index 3d63269..d26bbdc 100644
--- a/drivers/gpu/drm/msm/msm_drv.h
+++ b/drivers/gpu/drm/msm/msm_drv.h
@@ -22,6 +22,7 @@
#include <linux/clk.h>
#include <linux/cpufreq.h>
#include <linux/module.h>
+#include <linux/component.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/pm_runtime.h>
--
1.8.5.3
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