drm/radeon: start to document evergreen.c (377edc8b) · Commits · EulixOS / Software / Kernel

drivers/gpu/drm/radeon/evergreen.c

+120 −0

Original line number	Diff line number	Diff line
		@@ -99,6 +99,14 @@ void evergreen_fix_pci_max_read_req_size(struct radeon_device *rdev)
		}
		}

		/**
		* dce4_wait_for_vblank - vblank wait asic callback.
		*
		* @rdev: radeon_device pointer
		* @crtc: crtc to wait for vblank on
		*
		* Wait for vblank on the requested crtc (evergreen+).
		*/
		void dce4_wait_for_vblank(struct radeon_device *rdev, int crtc)
		{
		struct radeon_crtc *radeon_crtc = rdev->mode_info.crtcs[crtc];
		@@ -118,18 +126,49 @@ void dce4_wait_for_vblank(struct radeon_device *rdev, int crtc)
		}
		}

		/**
		* radeon_irq_kms_pflip_irq_get - pre-pageflip callback.
		*
		* @rdev: radeon_device pointer
		* @crtc: crtc to prepare for pageflip on
		*
		* Pre-pageflip callback (evergreen+).
		* Enables the pageflip irq (vblank irq).
		*/
		void evergreen_pre_page_flip(struct radeon_device *rdev, int crtc)
		{
		/* enable the pflip int */
		radeon_irq_kms_pflip_irq_get(rdev, crtc);
		}

		/**
		* evergreen_post_page_flip - pos-pageflip callback.
		*
		* @rdev: radeon_device pointer
		* @crtc: crtc to cleanup pageflip on
		*
		* Post-pageflip callback (evergreen+).
		* Disables the pageflip irq (vblank irq).
		*/
		void evergreen_post_page_flip(struct radeon_device *rdev, int crtc)
		{
		/* disable the pflip int */
		radeon_irq_kms_pflip_irq_put(rdev, crtc);
		}

		/**
		* evergreen_page_flip - pageflip callback.
		*
		* @rdev: radeon_device pointer
		* @crtc_id: crtc to cleanup pageflip on
		* @crtc_base: new address of the crtc (GPU MC address)
		*
		* Does the actual pageflip (evergreen+).
		* During vblank we take the crtc lock and wait for the update_pending
		* bit to go high, when it does, we release the lock, and allow the
		* double buffered update to take place.
		* Returns the current update pending status.
		*/
		u32 evergreen_page_flip(struct radeon_device *rdev, int crtc_id, u64 crtc_base)
		{
		struct radeon_crtc *radeon_crtc = rdev->mode_info.crtcs[crtc_id];
		@@ -214,6 +253,15 @@ int sumo_get_temp(struct radeon_device *rdev)
		return actual_temp * 1000;
		}

		/**
		* sumo_pm_init_profile - Initialize power profiles callback.
		*
		* @rdev: radeon_device pointer
		*
		* Initialize the power states used in profile mode
		* (sumo, trinity, SI).
		* Used for profile mode only.
		*/
		void sumo_pm_init_profile(struct radeon_device *rdev)
		{
		int idx;
		@@ -265,6 +313,14 @@ void sumo_pm_init_profile(struct radeon_device *rdev)
		rdev->pm.power_state[idx].num_clock_modes - 1;
		}

		/**
		* evergreen_pm_misc - set additional pm hw parameters callback.
		*
		* @rdev: radeon_device pointer
		*
		* Set non-clock parameters associated with a power state
		* (voltage, etc.) (evergreen+).
		*/
		void evergreen_pm_misc(struct radeon_device *rdev)
		{
		int req_ps_idx = rdev->pm.requested_power_state_index;
		@@ -292,6 +348,13 @@ void evergreen_pm_misc(struct radeon_device *rdev)
		}
		}

		/**
		* evergreen_pm_prepare - pre-power state change callback.
		*
		* @rdev: radeon_device pointer
		*
		* Prepare for a power state change (evergreen+).
		*/
		void evergreen_pm_prepare(struct radeon_device *rdev)
		{
		struct drm_device *ddev = rdev->ddev;
		@@ -310,6 +373,13 @@ void evergreen_pm_prepare(struct radeon_device *rdev)
		}
		}

		/**
		* evergreen_pm_finish - post-power state change callback.
		*
		* @rdev: radeon_device pointer
		*
		* Clean up after a power state change (evergreen+).
		*/
		void evergreen_pm_finish(struct radeon_device *rdev)
		{
		struct drm_device *ddev = rdev->ddev;
		@@ -328,6 +398,15 @@ void evergreen_pm_finish(struct radeon_device *rdev)
		}
		}

		/**
		* evergreen_hpd_sense - hpd sense callback.
		*
		* @rdev: radeon_device pointer
		* @hpd: hpd (hotplug detect) pin
		*
		* Checks if a digital monitor is connected (evergreen+).
		* Returns true if connected, false if not connected.
		*/
		bool evergreen_hpd_sense(struct radeon_device *rdev, enum radeon_hpd_id hpd)
		{
		bool connected = false;
		@@ -364,6 +443,14 @@ bool evergreen_hpd_sense(struct radeon_device *rdev, enum radeon_hpd_id hpd)
		return connected;
		}

		/**
		* evergreen_hpd_set_polarity - hpd set polarity callback.
		*
		* @rdev: radeon_device pointer
		* @hpd: hpd (hotplug detect) pin
		*
		* Set the polarity of the hpd pin (evergreen+).
		*/
		void evergreen_hpd_set_polarity(struct radeon_device *rdev,
		enum radeon_hpd_id hpd)
		{
		@@ -424,6 +511,14 @@ void evergreen_hpd_set_polarity(struct radeon_device *rdev,
		}
		}

		/**
		* evergreen_hpd_init - hpd setup callback.
		*
		* @rdev: radeon_device pointer
		*
		* Setup the hpd pins used by the card (evergreen+).
		* Enable the pin, set the polarity, and enable the hpd interrupts.
		*/
		void evergreen_hpd_init(struct radeon_device *rdev)
		{
		struct drm_device *dev = rdev->ddev;
		@@ -462,6 +557,14 @@ void evergreen_hpd_init(struct radeon_device *rdev)
		radeon_irq_kms_enable_hpd(rdev, enabled);
		}

		/**
		* evergreen_hpd_fini - hpd tear down callback.
		*
		* @rdev: radeon_device pointer
		*
		* Tear down the hpd pins used by the card (evergreen+).
		* Disable the hpd interrupts.
		*/
		void evergreen_hpd_fini(struct radeon_device *rdev)
		{
		struct drm_device *dev = rdev->ddev;
		@@ -925,6 +1028,14 @@ static void evergreen_program_watermarks(struct radeon_device *rdev,

		}

		/**
		* evergreen_bandwidth_update - update display watermarks callback.
		*
		* @rdev: radeon_device pointer
		*
		* Update the display watermarks based on the requested mode(s)
		* (evergreen+).
		*/
		void evergreen_bandwidth_update(struct radeon_device *rdev)
		{
		struct drm_display_mode *mode0 = NULL;
		@@ -948,6 +1059,15 @@ void evergreen_bandwidth_update(struct radeon_device *rdev)
		}
		}

		/**
		* evergreen_mc_wait_for_idle - wait for MC idle callback.
		*
		* @rdev: radeon_device pointer
		*
		* Wait for the MC (memory controller) to be idle.
		* (evergreen+).
		* Returns 0 if the MC is idle, -1 if not.
		*/
		int evergreen_mc_wait_for_idle(struct radeon_device *rdev)
		{
		unsigned i;