/**
* @file mali_kbase_platform.c
- * Platform-dependent init.
+ *
+ * 对 mali_kbase_platform.h 声明的 pm, clk 等接口的具体实现.
*/
+
#include <mali_kbase.h>
#include <mali_kbase_pm.h>
#include <mali_kbase_uku.h>
#include <linux/rockchip/dvfs.h>
+// #define ENABLE_DEBUG_LOG
#include "custom_log.h"
/* ############################################################################################# */
#define MALI_T7XX_DEFAULT_CLOCK 100000
+/**
+ * clk_of_gpu_dvfs_node 的状态.
+ * 1, clock 被使能.
+ * 0, 禁止.
+ */
static int mali_clk_status = 0;
+
+/**
+ * gpu_power_domain 的状态.
+ * 1, 上电.
+ * 0, 掉电.
+ */
static int mali_pd_status = 0;
-u32 kbase_group_error = 0;
+// u32 kbase_group_error = 0;
static struct kobject *rk_gpu;
-int mali_dvfs_clk_set(struct dvfs_node *node,unsigned long rate)
+int mali_dvfs_clk_set(struct dvfs_node *node, unsigned long rate)
{
int ret = 0;
if(!node)
printk("clk_get_dvfs_node error \r\n");
ret = -1;
}
+ /* .KP : 调用 dvfs_module 设置 gpu_clk. */
ret = dvfs_clk_set_rate(node,rate * MALI_KHZ);
if(ret)
{
}
return ret;
}
+
+/**
+ * 初始化和 gpu_pm 和 gpu_clk.
+ */
static int kbase_platform_power_clock_init(struct kbase_device *kbdev)
{
/*struct device *dev = kbdev->dev;*/
dvfs_clk_prepare_enable(platform->mali_clk_node);
printk("clk enabled\n");
}
- mali_dvfs_clk_set(platform->mali_clk_node,MALI_T7XX_DEFAULT_CLOCK);
-
+ mali_dvfs_clk_set(platform->mali_clk_node, MALI_T7XX_DEFAULT_CLOCK);
mali_clk_status = 1;
+
return 0;
out:
return -EPERM;
}
+
int kbase_platform_clock_off(struct kbase_device *kbdev)
{
struct rk_context *platform;
return 0;
}
+
int kbase_platform_is_power_on(void)
{
return mali_pd_status;
return 0;
}
+
int kbase_platform_cmu_pmu_control(struct kbase_device *kbdev, int control)
{
unsigned long flags;
/* off */
if (control == 0)
{
+ /* 若已经关闭, 则... */
if (platform->cmu_pmu_status == 0)
{
spin_unlock_irqrestore(&platform->cmu_pmu_lock, flags);
return 0;
}
+ /* 关闭 gpu_power_domain. */
if (kbase_platform_power_off(kbdev))
+ {
panic("failed to turn off mali power domain\n");
+ }
+ /* 关闭 gpu_dvfs_node 的 clock. */
if (kbase_platform_clock_off(kbdev))
+ {
panic("failed to turn off mali clock\n");
+ }
platform->cmu_pmu_status = 0;
printk("turn off mali power \n");
}
- else
+ else /* on */
{
- /* on */
if (platform->cmu_pmu_status == 1)
{
spin_unlock_irqrestore(&platform->cmu_pmu_lock, flags);
return 0;
}
+ /* 开启 gpu_power_domain. */
if (kbase_platform_power_on(kbdev))
+ {
panic("failed to turn on mali power domain\n");
+ }
+ /* 使能 gpu_dvfs_node 的 clock. */
if (kbase_platform_clock_on(kbdev))
+ {
panic("failed to turn on mali clock\n");
+ }
platform->cmu_pmu_status = 1;
printk(KERN_ERR "turn on mali power\n");
return 0;
}
+/*---------------------------------------------------------------------------*/
+
static ssize_t error_count_show(struct device *dev,struct device_attribute *attr, char *buf)
{
struct kbase_device *kbdev = dev_get_drvdata(dev);
ssize_t ret;
- D_PTR(dev);
- if ( NULL == kbdev )
- {
- E("fail to get kbase_device instance.");
- return 0;
- }
+ D_PTR(dev);
+ if ( NULL == kbdev )
+ {
+ E("fail to get kbase_device instance.");
+ return 0;
+ }
- D_DEC(kbdev->kbase_group_error);
- ret = scnprintf(buf, PAGE_SIZE, "%d\n", kbdev->kbase_group_error);
+ D_DEC(kbdev->kbase_group_error);
+ ret = scnprintf(buf, PAGE_SIZE, "%u\n", kbdev->kbase_group_error);
return ret;
}
static DEVICE_ATTR(error_count, S_IRUGO, error_count_show, NULL);
+
+/*---------------------------------------------------------------------------*/
+/* < 对在 sysfs_dir_of_mali_device 下的 rk_ext_file_nodes 的具体实现, >*/
+// .DP : impl_of_rk_ext_file_nodes.
+
+/**
+ * .doc : 对 sysfs_dir_of_mali_device 下 rk_ext_file_nodes 提供的接口的定义
+ *
+ * sysfs_dir_of_mali_device 通常是 sys/devices/ffa30000.gpu
+ *
+ * 其下有如下的 rk_ext_file_nodes :
+ * clock,
+ * 对该文件的 cat 操作, 将输出当前 gpu_clk_freq 和可能的 freq 的列表, 形如 :
+ * current_gpu_clk_freq : 99000 KHz
+ * possible_freqs : 99000, 179000, 297000, 417000, 480000 (KHz)
+ * 出现在 "possible_freqs" 中的有效频点, 依赖在 .dts 文件中的配置.
+ * 可以使用 echo 命令向本文件写入待设置的 gpu_clk_freq_in_khz, 比如 :
+ * echo 417000 > clock
+ * 注意, 这里写入的 gpu_clk_freq_in_khz "必须" 是出现在 possible_freqs 中的.
+ * 另外, mali_module 默认使能 dvfs,
+ * 所以若希望将 gpu_clk 固定在上面的特定 freq, 要关闭 dvfs 先 :
+ * echo off > dvfs
+ * fbdev,
+ * 只支持 cat.
+ * .R : 目前不确定该提供接口的用意.
+ * // dtlb,
+ * dvfs,
+ * cat 该节点, 将返回当前 mali_dvfs 的状态, 包括 mali_dvfs 是否开启, gpu 使用率, 当前 gpu_clk 频率.
+ * 若当前 mali_dvfs 被开启, 可能返回如下信息 :
+ * mali_dvfs is ON
+ * gpu_utilisation : 100
+ * current_gpu_clk_freq : 480 MHz
+ * 若当前 mali_dvfs 被关闭, 可能返回 :
+ * mali_dvfs is OFF
+ * current_gpu_clk_freq : 99 MHz
+ * 若一段时间没有 job 下发到 gpu, common_parts 也会自动关闭 mali_dvfs.
+ *
+ * 将字串 off 写入该节点, 将关闭 mali_dvfs,
+ * 且会将 gpu_clk_freq 固定到可能的最高的频率 或者 gpu_clk_freq_of_upper_limit(若有指定).
+ * 之后, 若将字串 on 写入该节点, 将重新开启 mali_dvfs.
+ *
+ * dvfs_upper_lock,
+ * cat 该节点, 返回当前 dvfs_level_upper_limit 的信息, 诸如
+ * upper_lock_freq : 417000 KHz
+ * possible upper_lock_freqs : 99000, 179000, 297000, 417000, 480000 (KHz)
+ * if you want to unset upper_lock_freq, to echo 'off' to this file.
+ *
+ * 对该节点写入上面 possible upper_lock_freqs 中的某个 频率, 可以将该频率设置为 gpu_clk_freq_of_upper_limit, 比如.
+ * echo 417000 > dvfs_upper_lock
+ * 若要清除之前设置的 dvfs_level_upper_limit, 写入 off 即可.
+ *
+ * dvfs_under_lock,
+ * cat 该节点, 返回当前 dvfs_level_lower_limit 的信息, 诸如
+ * under_lock_freq : 179000 KHz
+ * possible under_lock_freqs : 99000, 179000, 297000, 417000, 480000 (KHz)
+ * if you want to unset under_lock_freq, to echo 'off' to this file.
+ * 对该节点写入上面 possible under_lock_freq 中的某个 频率, 可以将该频率设置为 gpu_clk_freq_of_lower_limit, 比如.
+ * echo 179000 > dvfs_under_lock
+ * 若要清除之前设置的 dvfs_level_lower_limit, 写入 off 即可.
+ *
+ * time_in_state
+ * cat 该节点, 返回 mali_dvfs 停留在不同 level 中的时间统计, 譬如
+ * ------------------------------------------------------------------------------
+ * index_of_level gpu_clk_freq (KHz) time_in_this_level (s)
+ * ------------------------------------------------------------------------------
+ * 0 99 206
+ * 1 179 9
+ * 2 297 0
+ * 3 417 0
+ * 4 480 47
+ * ------------------------------------------------------------------------------
+ * 若通过 dvfs 节点, 开启/关闭 mali_dvfs, 则本节点输出的信息可能不准确.
+ *
+ * 若要复位上述时间统计, 可以向该节点写入任意字串, 比如 :
+ * echo dummy > time_in_state
+ */
+
#ifdef CONFIG_MALI_MIDGARD_DEBUG_SYS
static ssize_t show_clock(struct device *dev, struct device_attribute *attr, char *buf)
{
struct kbase_device *kbdev;
struct rk_context *platform;
ssize_t ret = 0;
- unsigned int clkrate;
+ unsigned int clkrate = 0; // 从 dvfs_module 获取的 gpu_clk_freq, Hz 为单位.
int i ;
kbdev = dev_get_drvdata(dev);
return -ENODEV;
}
clkrate = dvfs_clk_get_rate(platform->mali_clk_node);
- ret += snprintf(buf + ret, PAGE_SIZE - ret, "Current clk mali = %dMhz", clkrate / 1000000);
-
+ ret += snprintf(buf + ret, PAGE_SIZE - ret, "current_gpu_clk_freq : %d KHz", clkrate / 1000);
+
/* To be revised */
- ret += snprintf(buf + ret, PAGE_SIZE - ret, "\nPossible settings:");
- for(i=0;i<MALI_DVFS_STEP;i++)
- ret += snprintf(buf + ret, PAGE_SIZE - ret, "%d ",p_mali_dvfs_infotbl[i].clock/1000);
- ret += snprintf(buf + ret, PAGE_SIZE - ret, "Mhz");
+ ret += snprintf(buf + ret, PAGE_SIZE - ret, "\npossible_freqs : ");
+ for ( i = 0; i < MALI_DVFS_STEP; i++ )
+ {
+ if ( i < (MALI_DVFS_STEP - 1) )
+ {
+ ret += snprintf(buf + ret, PAGE_SIZE - ret, "%d, ", p_mali_dvfs_infotbl[i].clock);
+ }
+ else
+ {
+ ret += snprintf(buf + ret, PAGE_SIZE - ret, "%d ", p_mali_dvfs_infotbl[i].clock);
+ }
+ }
+ ret += snprintf(buf + ret, PAGE_SIZE - ret, "(KHz)");
if (ret < PAGE_SIZE - 1)
+ {
ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
+ }
else {
buf[PAGE_SIZE - 2] = '\n';
buf[PAGE_SIZE - 1] = '\0';
}
#endif
freq = simple_strtoul(buf, NULL, 10);
+ D("freq : %u.", freq);
kbase_platform_dvfs_set_level(kbdev, kbase_platform_dvfs_get_level(freq));
return count;
return -ENODEV;
for (i = 0; i < num_registered_fb; i++)
- ret += snprintf(buf + ret, PAGE_SIZE - ret, "fb[%d] xres=%d, yres=%d, addr=0x%lx\n", i, registered_fb[i]->var.xres, registered_fb[i]->var.yres, registered_fb[i]->fix.smem_start);
+ {
+ ret += snprintf(buf + ret,
+ PAGE_SIZE - ret,
+ "fb[%d] xres=%d, yres=%d, addr=0x%lx\n",
+ i,
+ registered_fb[i]->var.xres,
+ registered_fb[i]->var.yres,
+ registered_fb[i]->fix.smem_start);
+ }
if (ret < PAGE_SIZE - 1)
ret += snprintf(buf + ret, PAGE_SIZE - ret, "\n");
if (!platform)
return -ENODEV;
+ /* 获取当前 gpu_dvfs_node 的 clk_freq, Hz 为单位. */
clkrate = dvfs_clk_get_rate(platform->mali_clk_node);
#ifdef CONFIG_MALI_MIDGARD_DVFS
+ /* 若 mali_dvfs 是 开启的, 则... */
if (kbase_platform_dvfs_get_enable_status())
- ret += snprintf(buf + ret, PAGE_SIZE - ret, "mali DVFS is on\nutilisation:%d\ncurrent clock:%dMhz", kbase_platform_dvfs_get_utilisation(),clkrate/1000000);
+ {
+ ret += snprintf(buf + ret,
+ PAGE_SIZE - ret,
+ "mali_dvfs is ON \ngpu_utilisation : %d \ncurrent_gpu_clk_freq : %u MHz",
+ kbase_platform_dvfs_get_utilisation(),
+ clkrate / 1000000);
+ }
+ /* 否则, ... */
else
- ret += snprintf(buf + ret, PAGE_SIZE - ret, "mali DVFS is off,clock:%dMhz",clkrate/1000000);
+ {
+ ret += snprintf(buf + ret,
+ PAGE_SIZE - ret,
+ "mali_dvfs is OFF \ncurrent_gpu_clk_freq : %u MHz",
+ clkrate / 1000000);
+ }
#else
- ret += snprintf(buf + ret, PAGE_SIZE - ret, "mali DVFS is disabled");
+ ret += snprintf(buf + ret, PAGE_SIZE - ret, "mali_dvfs is DISABLED");
#endif
if (ret < PAGE_SIZE - 1)
platform = (struct rk_context *)kbdev->platform_context;
if (sysfs_streq("off", buf)) {
/*kbase_platform_dvfs_enable(false, MALI_DVFS_BL_CONFIG_FREQ);*/
+ D("to disable mali_dvfs, and set current_dvfs_level to the highest one.");
kbase_platform_dvfs_enable(false, p_mali_dvfs_infotbl[MALI_DVFS_STEP-1].clock);
platform->dvfs_enabled = false;
} else if (sysfs_streq("on", buf)) {
/*kbase_platform_dvfs_enable(true, MALI_DVFS_START_FREQ);*/
+ D("to disable mali_dvfs, and set current_dvfs_level to the lowest one.");
kbase_platform_dvfs_enable(true, p_mali_dvfs_infotbl[0].clock);
platform->dvfs_enabled = true;
} else {
ssize_t ret = 0;
int i;
#ifdef CONFIG_MALI_MIDGARD_DVFS
- int locked_level = -1;
+ int gpu_clk_freq = 0;
#endif
kbdev = dev_get_drvdata(dev);
if (!kbdev)
+ {
+ E("err.");
return -ENODEV;
+ }
#ifdef CONFIG_MALI_MIDGARD_DVFS
- locked_level = mali_get_dvfs_upper_locked_freq();
- if (locked_level > 0)
- ret += snprintf(buf + ret, PAGE_SIZE - ret, "Current Upper Lock Level = %dMhz", locked_level);
+ gpu_clk_freq = mali_get_dvfs_upper_locked_freq();
+ if (gpu_clk_freq > 0)
+ {
+ ret += snprintf(buf + ret, PAGE_SIZE - ret, "upper_lock_freq : %d KHz", gpu_clk_freq);
+ }
else
- ret += snprintf(buf + ret, PAGE_SIZE - ret, "Unset the Upper Lock Level");
+ {
+ ret += snprintf(buf + ret, PAGE_SIZE - ret, "upper_lock_freq is NOT set");
+ }
/*ret += snprintf(buf + ret, PAGE_SIZE - ret, "\nPossible settings : 400, 350,266, 160, 100, If you want to unlock : 600 or off");*/
- ret += snprintf(buf + ret, PAGE_SIZE - ret, "\nPossible settings :");
- for(i=0;i<MALI_DVFS_STEP;i++)
- ret += snprintf(buf + ret, PAGE_SIZE - ret, "%d ",p_mali_dvfs_infotbl[i].clock/1000);
- ret += snprintf(buf + ret, PAGE_SIZE - ret, "Mhz");
- ret += snprintf(buf + ret, PAGE_SIZE - ret, ", If you want to unlock : off");
+ ret += snprintf(buf + ret, PAGE_SIZE - ret, "\npossible upper_lock_freqs : ");
+ for ( i = 0; i < MALI_DVFS_STEP; i++ )
+ {
+ if ( i < (MALI_DVFS_STEP - 1) )
+ {
+ ret += snprintf(buf + ret, PAGE_SIZE - ret, "%d, ", p_mali_dvfs_infotbl[i].clock);
+ }
+ else
+ {
+ ret += snprintf(buf + ret, PAGE_SIZE - ret, "%d ", p_mali_dvfs_infotbl[i].clock);
+ }
+ }
+ ret += snprintf(buf + ret, PAGE_SIZE - ret, "(KHz)");
+
+ if ( gpu_clk_freq > 0 )
+ {
+ ret += snprintf(buf + ret, PAGE_SIZE - ret, "\nif you want to unset upper_lock_freq, to echo 'off' to this file.");
+ }
#else
ret += snprintf(buf + ret, PAGE_SIZE - ret, "mali DVFS is disabled. You can not set");
#endif
static ssize_t set_upper_lock_dvfs(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
- struct kbase_device *kbdev;
+ struct kbase_device *kbdev = NULL;
int i;
- unsigned int freq;
- kbdev = dev_get_drvdata(dev);
- freq = 0;
+ unsigned int freq = 0; // 可能由 caller 传入的, 待设置的 gpu_freq_upper_limit.
+ int ret = 0;
- if (!kbdev)
- return -ENODEV;
+ kbdev = dev_get_drvdata(dev);
-freq = simple_strtoul(buf, NULL, 10);
+ if ( NULL == kbdev)
+ {
+ E("'kbdev' is NULL.");
+ return -ENODEV;
+ }
#ifdef CONFIG_MALI_MIDGARD_DVFS
if (sysfs_streq("off", buf))
}
else
{
+ freq = simple_strtoul(buf, NULL, 10);
+ D_DEC(freq);
+
+ D("to search the level that matches target_freq; num_of_mali_dvfs_levels : %d.", MALI_DVFS_STEP);
for(i=0;i<MALI_DVFS_STEP;i++)
{
+ D("p_mali_dvfs_infotbl[%d].clock : %d", i, p_mali_dvfs_infotbl[i].clock);
if (p_mali_dvfs_infotbl[i].clock == freq)
{
- mali_dvfs_freq_lock(i);
+ D("target_freq is acceptable in level '%d', to set '%d' as index of dvfs_level_upper_limit.", i, i);
+ ret = mali_dvfs_freq_lock(i);
+ if ( 0 != ret )
+ {
+ E("fail to set dvfs_level_upper_limit, ret : %d.", ret);
+ return -EINVAL;
+ }
break;
}
- if(i==MALI_DVFS_STEP)
- {
- dev_err(dev, "set_clock: invalid value\n");
- return -ENOENT;
- }
+ }
+ /* 若 "没有" 找到和 target_freq match 的 level, 则... */
+ if ( MALI_DVFS_STEP == i )
+ {
+ // dev_err(dev, "set_clock: invalid value\n");
+ E("invalid target_freq : %d", freq);
+ return -ENOENT;
}
}
+
#else /* CONFIG_MALI_MIDGARD_DVFS */
printk(KERN_DEBUG "mali DVFS is disabled. You can not set\n");
#endif
ssize_t ret = 0;
int i;
#ifdef CONFIG_MALI_MIDGARD_DVFS
- int locked_level = -1;
+ int gpu_clk_freq = 0;
#endif
kbdev = dev_get_drvdata(dev);
return -ENODEV;
#ifdef CONFIG_MALI_MIDGARD_DVFS
- locked_level = mali_get_dvfs_under_locked_freq();
- if (locked_level > 0)
- ret += snprintf(buf + ret, PAGE_SIZE - ret, "Current Under Lock Level = %dMhz", locked_level);
+ gpu_clk_freq = mali_get_dvfs_under_locked_freq();
+ if (gpu_clk_freq > 0)
+ {
+ ret += snprintf(buf + ret, PAGE_SIZE - ret, "under_lock_freq : %d KHz",gpu_clk_freq);
+ }
else
- ret += snprintf(buf + ret, PAGE_SIZE - ret, "Unset the Under Lock Level");
+ {
+ ret += snprintf(buf + ret, PAGE_SIZE - ret, "under_lock_freq is NOT set.");
+ }
/*ret += snprintf(buf + ret, PAGE_SIZE - ret, "\nPossible settings : 600, 400, 350,266, 160, If you want to unlock : 100 or off");*/
- ret += snprintf(buf + ret, PAGE_SIZE - ret, "\nPossible settings :");
- for(i=0;i<MALI_DVFS_STEP;i++)
- ret += snprintf(buf + ret, PAGE_SIZE - ret, "%d ",p_mali_dvfs_infotbl[i].clock/1000);
- ret += snprintf(buf + ret, PAGE_SIZE - ret, "Mhz");
- ret += snprintf(buf + ret, PAGE_SIZE - ret, ", If you want to unlock : off");
+ ret += snprintf(buf + ret, PAGE_SIZE - ret, "\npossible under_lock_freqs : ");
+ for ( i = 0; i < MALI_DVFS_STEP; i++ )
+ {
+ if ( i < (MALI_DVFS_STEP - 1) )
+ {
+ ret += snprintf(buf + ret, PAGE_SIZE - ret, "%d, ", p_mali_dvfs_infotbl[i].clock);
+ }
+ else
+ {
+ ret += snprintf(buf + ret, PAGE_SIZE - ret, "%d ", p_mali_dvfs_infotbl[i].clock);
+ }
+ }
+ ret += snprintf(buf + ret, PAGE_SIZE - ret, "(KHz)");
+ if ( gpu_clk_freq > 0 )
+ {
+ ret += snprintf(buf + ret, PAGE_SIZE - ret, "\nif you want to unset under_lock_freq, to echo 'off' to this file.");
+ }
#else
ret += snprintf(buf + ret, PAGE_SIZE - ret, "mali DVFS is disabled. You can not set");
#endif
static ssize_t set_under_lock_dvfs(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
{
int i;
- unsigned int freq;
- struct kbase_device *kbdev;
- kbdev = dev_get_drvdata(dev);
- freq = 0;
+ unsigned int freq = 0;
+ struct kbase_device *kbdev = NULL;
+ int ret = 0;
- if (!kbdev)
+ kbdev = dev_get_drvdata(dev);
+ if ( NULL == kbdev)
+ {
+ E("err.")
return -ENODEV;
+ }
#ifdef CONFIG_MALI_MIDGARD_DVFS
if (sysfs_streq("off", buf))
{
- mali_dvfs_freq_unlock();
+ mali_dvfs_freq_under_unlock();
}
else
{
+ freq = simple_strtoul(buf, NULL, 10);
+ D_DEC(freq);
+
for(i=0;i<MALI_DVFS_STEP;i++)
{
if (p_mali_dvfs_infotbl[i].clock == freq)
{
- mali_dvfs_freq_lock(i);
+ D("to set '%d' as the index of dvfs_level_lower_limit", i);
+ ret = mali_dvfs_freq_under_lock(i);
+ if ( 0 != ret )
+ {
+ E("fail to set dvfs_level_lower_limit, ret : %d.", ret);
+ return -EINVAL;
+ }
break;
}
- if(i==MALI_DVFS_STEP)
- {
- dev_err(dev, "set_clock: invalid value\n");
- return -ENOENT;
- }
+ }
+ /* 若 "没有" 找到和 target_freq match 的 level, 则... */
+ if( i == MALI_DVFS_STEP )
+ {
+ dev_err(dev, "set_clock: invalid value\n");
+ return -ENOENT;
}
}
+
#else /* CONFIG_MALI_MIDGARD_DVFS */
printk(KERN_DEBUG "mali DVFS is disabled. You can not set\n");
#endif
DEVICE_ATTR(dvfs_upper_lock, S_IRUGO | S_IWUSR, show_upper_lock_dvfs, set_upper_lock_dvfs);
DEVICE_ATTR(dvfs_under_lock, S_IRUGO | S_IWUSR, show_under_lock_dvfs, set_under_lock_dvfs);
DEVICE_ATTR(time_in_state, S_IRUGO | S_IWUSR, show_time_in_state, set_time_in_state);
+/*---------------------------------------------------------------------------*/
int kbase_platform_create_sysfs_file(struct device *dev)
{
goto out;
}
- /* rk_ext : device will crash after "cat /sys/devices/ffa30000.gpu/dtlb".
+ /* rk_ext : device will crash after "cat /sys/devices/ffa30000.gpu/dtlb".
if (device_create_file(dev, &dev_attr_dtlb)) {
dev_err(dev, "Couldn't create sysfs file [dtlb]\n");
goto out;
}
- */
+ */
if (device_create_file(dev, &dev_attr_dvfs)) {
dev_err(dev, "Couldn't create sysfs file [dvfs]\n");
goto out;
}
return 0;
+
out:
return -ENOENT;
}
if (NULL == platform)
return MALI_ERROR_OUT_OF_MEMORY;
+ /* .KP : 将 'rk_context' 关联到 mali_device. */
kbdev->platform_context = (void *)platform;
platform->cmu_pmu_status = 0;
projects / firefly-linux-kernel-4.4.55.git / blobdiff