1 // SPDX-License-Identifier: MIT
17 static i915_reg_t intel_vga_cntrl_reg(struct intel_display *display)  in intel_vga_cntrl_reg()  argument
19 	if (display->platform.valleyview || display->platform.cherryview)  in intel_vga_cntrl_reg()
21 	else if (DISPLAY_VER(display) >= 5)  in intel_vga_cntrl_reg()
28 void intel_vga_disable(struct intel_display *display)  in intel_vga_disable()  argument
30 	struct pci_dev *pdev = to_pci_dev(display->drm->dev);  in intel_vga_disable()
31 	i915_reg_t vga_reg = intel_vga_cntrl_reg(display);  in intel_vga_disable()
34 	if (intel_de_read(display, vga_reg) & VGA_DISP_DISABLE)  in intel_vga_disable()
45 	intel_de_write(display, vga_reg, VGA_DISP_DISABLE);  in intel_vga_disable()
46 	intel_de_posting_read(display, vga_reg);  in intel_vga_disable()
49 void intel_vga_redisable_power_on(struct intel_display *display)  in intel_vga_redisable_power_on()  argument
51 	i915_reg_t vga_reg = intel_vga_cntrl_reg(display);  in intel_vga_redisable_power_on()
53 	if (!(intel_de_read(display, vga_reg) & VGA_DISP_DISABLE)) {  in intel_vga_redisable_power_on()
54 		drm_dbg_kms(display->drm,  in intel_vga_redisable_power_on()
56 		intel_vga_disable(display);  in intel_vga_redisable_power_on()
60 void intel_vga_redisable(struct intel_display *display)  in intel_vga_redisable()  argument
66 	 * at a very early point in our resume sequence, where the power well  in intel_vga_redisable()
67 	 * structures are not yet restored. Since this function is at a very  in intel_vga_redisable()
73 	wakeref = intel_display_power_get_if_enabled(display, POWER_DOMAIN_VGA);  in intel_vga_redisable()
77 	intel_vga_redisable_power_on(display);  in intel_vga_redisable()
79 	intel_display_power_put(display, POWER_DOMAIN_VGA, wakeref);  in intel_vga_redisable()
82 void intel_vga_reset_io_mem(struct intel_display *display)  in intel_vga_reset_io_mem()  argument
84 	struct pci_dev *pdev = to_pci_dev(display->drm->dev);  in intel_vga_reset_io_mem()
87 	 * After we re-enable the power well, if we touch VGA register 0x3d5  in intel_vga_reset_io_mem()
90 	 * register all the time, so if we unbind our driver and, as a  in intel_vga_reset_io_mem()
101 int intel_vga_register(struct intel_display *display)  in intel_vga_register()  argument
104 	struct pci_dev *pdev = to_pci_dev(display->drm->dev);  in intel_vga_register()
111 	 * If we are a secondary display controller (!PCI_DISPLAY_CLASS_VGA),  in intel_vga_register()
113 	 * vga_client_register() fails with -ENODEV.  in intel_vga_register()
116 	if (ret && ret != -ENODEV)  in intel_vga_register()
122 void intel_vga_unregister(struct intel_display *display)  in intel_vga_unregister()  argument
124 	struct pci_dev *pdev = to_pci_dev(display->drm->dev);  in intel_vga_unregister()