diff options
Diffstat (limited to 'drivers/gpu/arm/midgard/platform/juno_soc/mali_kbase_config_juno_soc.c')
| -rwxr-xr-x | drivers/gpu/arm/midgard/platform/juno_soc/mali_kbase_config_juno_soc.c | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/drivers/gpu/arm/midgard/platform/juno_soc/mali_kbase_config_juno_soc.c b/drivers/gpu/arm/midgard/platform/juno_soc/mali_kbase_config_juno_soc.c new file mode 100755 index 000000000000..5a33d33e32e5 --- /dev/null +++ b/drivers/gpu/arm/midgard/platform/juno_soc/mali_kbase_config_juno_soc.c @@ -0,0 +1,156 @@ +/* + * + * (C) COPYRIGHT ARM Limited. All rights reserved. + * + * This program is free software and is provided to you under the terms of the + * GNU General Public License version 2 as published by the Free Software + * Foundation, and any use by you of this program is subject to the terms + * of such GNU licence. + * + * A copy of the licence is included with the program, and can also be obtained + * from Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, + * Boston, MA 02110-1301, USA. + * + */ + + + +#include <linux/ioport.h> +#include <linux/devfreq_cooling.h> +#include <linux/thermal.h> +#include <mali_kbase.h> +#include <mali_kbase_defs.h> +#include <mali_kbase_config.h> + +/* Versatile Express (VE) Juno Development Platform */ + +#define HARD_RESET_AT_POWER_OFF 0 + +#ifndef CONFIG_OF +static struct kbase_io_resources io_resources = { + .job_irq_number = 65, + .mmu_irq_number = 66, + .gpu_irq_number = 64, + .io_memory_region = { + .start = 0x2D000000, + .end = 0x2D000000 + (4096 * 4) - 1} +}; +#endif + +static int pm_callback_power_on(struct kbase_device *kbdev) +{ + /* Nothing is needed on VExpress, but we may have destroyed GPU state (if the below HARD_RESET code is active) */ + return 1; +} + +static void pm_callback_power_off(struct kbase_device *kbdev) +{ +#if HARD_RESET_AT_POWER_OFF + /* Cause a GPU hard reset to test whether we have actually idled the GPU + * and that we properly reconfigure the GPU on power up. + * Usually this would be dangerous, but if the GPU is working correctly it should + * be completely safe as the GPU should not be active at this point. + * However this is disabled normally because it will most likely interfere with + * bus logging etc. + */ + KBASE_TRACE_ADD(kbdev, CORE_GPU_HARD_RESET, NULL, NULL, 0u, 0); + kbase_os_reg_write(kbdev, GPU_CONTROL_REG(GPU_COMMAND), GPU_COMMAND_HARD_RESET); +#endif +} + +static struct kbase_pm_callback_conf pm_callbacks = { + .power_on_callback = pm_callback_power_on, + .power_off_callback = pm_callback_power_off, + .power_suspend_callback = NULL, + .power_resume_callback = NULL +}; + +#define FALLBACK_STATIC_TEMPERATURE 55000 + +static unsigned long juno_model_static_power(unsigned long voltage) +{ + struct thermal_zone_device *tz; + unsigned long temperature, temp; + unsigned long temp_squared, temp_cubed, temp_scaling_factor; + const unsigned long coefficient = (410UL << 20) / (729000000UL >> 10); + const unsigned long voltage_cubed = (voltage * voltage * voltage) >> 10; + + tz = thermal_zone_get_zone_by_name("gpu"); + if (IS_ERR(tz)) { + pr_warn_ratelimited("Error getting gpu thermal zone (%ld), not yet ready?\n", + PTR_ERR(tz)); + temperature = FALLBACK_STATIC_TEMPERATURE; + } else { + int ret; + + ret = tz->ops->get_temp(tz, &temperature); + if (ret) { + pr_warn_ratelimited("Error reading temperature for gpu thermal zone: %d\n", + ret); + temperature = FALLBACK_STATIC_TEMPERATURE; + } + } + + /* Calculate the temperature scaling factor. To be applied to the + * voltage scaled power. + */ + temp = temperature / 1000; + temp_squared = temp * temp; + temp_cubed = temp_squared * temp; + temp_scaling_factor = + (2 * temp_cubed) + - (80 * temp_squared) + + (4700 * temp) + + 32000; + + return (((coefficient * voltage_cubed) >> 20) + * temp_scaling_factor) + / 1000000; +} + +static unsigned long juno_model_dynamic_power(unsigned long freq, + unsigned long voltage) +{ + /* The inputs: freq (f) is in Hz, and voltage (v) in mV. + * The coefficient (c) is in mW/(MHz mV mV). + * + * This function calculates the dynamic power after this formula: + * Pdyn (mW) = c (mW/(MHz*mV*mV)) * v (mV) * v (mV) * f (MHz) + */ + const unsigned long v2 = (voltage * voltage) / 1000; /* m*(V*V) */ + const unsigned long f_mhz = freq / 1000000; /* MHz */ + const unsigned long coefficient = 3600; /* mW/(MHz*mV*mV) */ + + return (coefficient * v2 * f_mhz) / 1000000; /* mW */ +} + +struct devfreq_cooling_ops juno_model_ops = { + .get_static_power = juno_model_static_power, + .get_dynamic_power = juno_model_dynamic_power, +}; + +static struct kbase_attribute config_attributes[] = { + { KBASE_CONFIG_ATTR_JS_RESET_TIMEOUT_MS, 500 }, + { KBASE_CONFIG_ATTR_POWER_MANAGEMENT_CALLBACKS, ((uintptr_t)&pm_callbacks) }, + { KBASE_CONFIG_ATTR_POWER_MODEL_CALLBACKS, ((uintptr_t)&juno_model_ops) }, + + { KBASE_CONFIG_ATTR_END, 0 } +}; + +static struct kbase_platform_config versatile_platform_config = { + .attributes = config_attributes, +#ifndef CONFIG_OF + .io_resources = &io_resources +#endif +}; + +struct kbase_platform_config *kbase_get_platform_config(void) +{ + return &versatile_platform_config; +} + +int kbase_platform_early_init(void) +{ + /* Nothing needed at this stage */ + return 0; +} |