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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-24 17:59:32 +00:00
drm/radeon: implement handler for ACPI event
Set up an handler for ACPI events and respond to brightness change requests from the system BIOS. v2: fix notification when using device-specific command codes (tested by Pali Rohár <pali.rohar@gmail.com>); cache the encoder controlling the backlight during the initialization to avoid searching it every time (suggested by Alex Deucher). v3: whitespace fixes (Alex Deucher). Signed-off-by: Luca Tettamanti <kronos.it@gmail.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
parent
ce3cf821a3
commit
fda4b25c55
7 changed files with 152 additions and 11 deletions
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@ -72,7 +72,7 @@ radeon_atom_set_backlight_level_to_reg(struct radeon_device *rdev,
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WREG32(RADEON_BIOS_2_SCRATCH, bios_2_scratch);
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}
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static void
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void
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atombios_set_panel_brightness(struct radeon_encoder *radeon_encoder)
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{
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struct drm_encoder *encoder = &radeon_encoder->base;
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@ -1461,6 +1461,7 @@ struct radeon_atif {
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struct radeon_atif_notifications notifications;
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struct radeon_atif_functions functions;
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struct radeon_atif_notification_cfg notification_cfg;
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struct radeon_encoder *backlight_ctl;
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};
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/*
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@ -26,6 +26,7 @@
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#include <linux/slab.h>
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#include <acpi/acpi_drivers.h>
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#include <acpi/acpi_bus.h>
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#include <acpi/video.h>
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#include "drmP.h"
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#include "drm.h"
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@ -33,6 +34,7 @@
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#include "drm_crtc_helper.h"
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#include "radeon.h"
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#include "radeon_acpi.h"
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#include "atom.h"
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#include <linux/vga_switcheroo.h>
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@ -44,10 +46,22 @@ struct atif_verify_interface {
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} __packed;
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struct atif_system_params {
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u16 size;
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u32 valid_mask;
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u32 flags;
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u8 command_code;
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u16 size; /* structure size in bytes (includes size field) */
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u32 valid_mask; /* valid flags mask */
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u32 flags; /* flags */
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u8 command_code; /* notify command code */
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} __packed;
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struct atif_sbios_requests {
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u16 size; /* structure size in bytes (includes size field) */
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u32 pending; /* pending sbios requests */
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u8 panel_exp_mode; /* panel expansion mode */
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u8 thermal_gfx; /* thermal state: target gfx controller */
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u8 thermal_state; /* thermal state: state id (0: exit state, non-0: state) */
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u8 forced_power_gfx; /* forced power state: target gfx controller */
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u8 forced_power_state; /* forced power state: state id */
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u8 system_power_src; /* system power source */
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u8 backlight_level; /* panel backlight level (0-255) */
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} __packed;
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#define ATIF_NOTIFY_MASK 0x3
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@ -180,6 +194,8 @@ static int radeon_atif_get_notification_params(acpi_handle handle,
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size = min(sizeof(params), size);
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memcpy(¶ms, info->buffer.pointer, size);
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DRM_DEBUG_DRIVER("SYSTEM_PARAMS: mask = %#x, flags = %#x\n",
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params.flags, params.valid_mask);
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params.flags = params.flags & params.valid_mask;
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if ((params.flags & ATIF_NOTIFY_MASK) == ATIF_NOTIFY_NONE) {
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@ -198,10 +214,91 @@ static int radeon_atif_get_notification_params(acpi_handle handle,
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}
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out:
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DRM_DEBUG_DRIVER("Notification %s, command code = %#x\n",
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(n->enabled ? "enabled" : "disabled"),
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n->command_code);
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kfree(info);
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return err;
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}
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static int radeon_atif_get_sbios_requests(acpi_handle handle,
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struct atif_sbios_requests *req)
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{
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union acpi_object *info;
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size_t size;
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int count = 0;
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info = radeon_atif_call(handle, ATIF_FUNCTION_GET_SYSTEM_BIOS_REQUESTS, NULL);
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if (!info)
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return -EIO;
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size = *(u16 *)info->buffer.pointer;
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if (size < 0xd) {
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count = -EINVAL;
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goto out;
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}
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memset(req, 0, sizeof(*req));
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size = min(sizeof(*req), size);
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memcpy(req, info->buffer.pointer, size);
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DRM_DEBUG_DRIVER("SBIOS pending requests: %#x\n", req->pending);
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count = hweight32(req->pending);
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out:
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kfree(info);
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return count;
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}
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int radeon_atif_handler(struct radeon_device *rdev,
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struct acpi_bus_event *event)
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{
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struct radeon_atif *atif = &rdev->atif;
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struct atif_sbios_requests req;
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acpi_handle handle;
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int count;
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DRM_DEBUG_DRIVER("event, device_class = %s, type = %#x\n",
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event->device_class, event->type);
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if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
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return NOTIFY_DONE;
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if (!atif->notification_cfg.enabled ||
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event->type != atif->notification_cfg.command_code)
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/* Not our event */
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return NOTIFY_DONE;
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/* Check pending SBIOS requests */
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handle = DEVICE_ACPI_HANDLE(&rdev->pdev->dev);
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count = radeon_atif_get_sbios_requests(handle, &req);
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if (count <= 0)
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return NOTIFY_DONE;
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DRM_DEBUG_DRIVER("ATIF: %d pending SBIOS requests\n", count);
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if (req.pending & ATIF_PANEL_BRIGHTNESS_CHANGE_REQUEST) {
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struct radeon_encoder *enc = atif->backlight_ctl;
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if (enc) {
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struct radeon_encoder_atom_dig *dig = enc->enc_priv;
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dig->backlight_level = req.backlight_level;
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DRM_DEBUG_DRIVER("Changing brightness to %d\n",
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req.backlight_level);
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atombios_set_panel_brightness(enc);
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backlight_force_update(dig->bl_dev,
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BACKLIGHT_UPDATE_HOTKEY);
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}
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}
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/* TODO: check other events */
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return NOTIFY_OK;
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}
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/* Call all ACPI methods here */
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int radeon_acpi_init(struct radeon_device *rdev)
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{
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@ -223,6 +320,33 @@ int radeon_acpi_init(struct radeon_device *rdev)
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goto out;
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}
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if (atif->notifications.brightness_change) {
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struct drm_encoder *tmp;
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struct radeon_encoder *target = NULL;
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/* Find the encoder controlling the brightness */
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list_for_each_entry(tmp, &rdev->ddev->mode_config.encoder_list,
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head) {
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struct radeon_encoder *enc = to_radeon_encoder(tmp);
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struct radeon_encoder_atom_dig *dig = enc->enc_priv;
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if ((enc->devices & (ATOM_DEVICE_LCD_SUPPORT)) &&
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dig->bl_dev != NULL) {
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target = enc;
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break;
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}
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}
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atif->backlight_ctl = target;
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if (!target) {
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/* Brightness change notification is enabled, but we
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* didn't find a backlight controller, this should
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* never happen.
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*/
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DRM_ERROR("Cannot find a backlight controller\n");
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}
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}
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if (atif->functions.sbios_requests && !atif->functions.system_params) {
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/* XXX check this workraround, if sbios request function is
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* present we have to see how it's configured in the system
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@ -24,6 +24,12 @@
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#ifndef RADEON_ACPI_H
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#define RADEON_ACPI_H
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struct radeon_device;
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struct acpi_bus_event;
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int radeon_atif_handler(struct radeon_device *rdev,
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struct acpi_bus_event *event);
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/* AMD hw uses four ACPI control methods:
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* 1. ATIF
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* ARG0: (ACPI_INTEGER) function code
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@ -103,11 +103,6 @@ int radeon_driver_load_kms(struct drm_device *dev, unsigned long flags)
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goto out;
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}
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/* Call ACPI methods */
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acpi_status = radeon_acpi_init(rdev);
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if (acpi_status)
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dev_dbg(&dev->pdev->dev, "Error during ACPI methods call\n");
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/* Again modeset_init should fail only on fatal error
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* otherwise it should provide enough functionalities
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* for shadowfb to run
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@ -115,6 +110,17 @@ int radeon_driver_load_kms(struct drm_device *dev, unsigned long flags)
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r = radeon_modeset_init(rdev);
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if (r)
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dev_err(&dev->pdev->dev, "Fatal error during modeset init\n");
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/* Call ACPI methods: require modeset init
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* but failure is not fatal
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*/
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if (!r) {
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acpi_status = radeon_acpi_init(rdev);
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if (acpi_status)
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dev_dbg(&dev->pdev->dev,
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"Error during ACPI methods call\n");
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}
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out:
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if (r)
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radeon_driver_unload_kms(dev);
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@ -698,6 +698,8 @@ void radeon_panel_mode_fixup(struct drm_encoder *encoder,
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struct drm_display_mode *adjusted_mode);
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void atom_rv515_force_tv_scaler(struct radeon_device *rdev, struct radeon_crtc *radeon_crtc);
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void atombios_set_panel_brightness(struct radeon_encoder *radeon_encoder);
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/* legacy tv */
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void radeon_legacy_tv_adjust_crtc_reg(struct drm_encoder *encoder,
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uint32_t *h_total_disp, uint32_t *h_sync_strt_wid,
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@ -22,6 +22,7 @@
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*/
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#include "drmP.h"
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#include "radeon.h"
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#include "radeon_acpi.h"
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#include "avivod.h"
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#include "atom.h"
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#ifdef CONFIG_ACPI
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@ -94,7 +95,8 @@ static int radeon_acpi_event(struct notifier_block *nb,
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}
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}
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return NOTIFY_OK;
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/* Check for pending SBIOS requests */
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return radeon_atif_handler(rdev, entry);
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}
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#endif
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