Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
76 lines
1.7 KiB
C
76 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2023 Loongson Technology Corporation Limited
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*/
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#include <drm/drm_print.h>
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#include <drm/drm_vblank.h>
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#include "lsdc_irq.h"
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/*
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* For the DC in LS7A2000, clearing interrupt status is achieved by
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* write "1" to LSDC_INT_REG.
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*
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* For the DC in LS7A1000, clear interrupt status is achieved by write "0"
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* to LSDC_INT_REG.
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*
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* Two different hardware engineers modify it as their will.
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*/
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irqreturn_t ls7a2000_dc_irq_handler(int irq, void *arg)
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{
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struct drm_device *ddev = arg;
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struct lsdc_device *ldev = to_lsdc(ddev);
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u32 val;
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/* Read the interrupt status */
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val = lsdc_rreg32(ldev, LSDC_INT_REG);
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if ((val & INT_STATUS_MASK) == 0) {
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drm_warn(ddev, "no interrupt occurs\n");
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return IRQ_NONE;
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}
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ldev->irq_status = val;
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/* write "1" to clear the interrupt status */
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lsdc_wreg32(ldev, LSDC_INT_REG, val);
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if (ldev->irq_status & INT_CRTC0_VSYNC)
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drm_handle_vblank(ddev, 0);
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if (ldev->irq_status & INT_CRTC1_VSYNC)
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drm_handle_vblank(ddev, 1);
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return IRQ_HANDLED;
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}
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/* For the DC in LS7A1000 and LS2K1000 */
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irqreturn_t ls7a1000_dc_irq_handler(int irq, void *arg)
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{
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struct drm_device *ddev = arg;
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struct lsdc_device *ldev = to_lsdc(ddev);
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u32 val;
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/* Read the interrupt status */
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val = lsdc_rreg32(ldev, LSDC_INT_REG);
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if ((val & INT_STATUS_MASK) == 0) {
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drm_warn(ddev, "no interrupt occurs\n");
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return IRQ_NONE;
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}
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ldev->irq_status = val;
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/* write "0" to clear the interrupt status */
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val &= ~(INT_CRTC0_VSYNC | INT_CRTC1_VSYNC);
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lsdc_wreg32(ldev, LSDC_INT_REG, val);
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if (ldev->irq_status & INT_CRTC0_VSYNC)
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drm_handle_vblank(ddev, 0);
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if (ldev->irq_status & INT_CRTC1_VSYNC)
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drm_handle_vblank(ddev, 1);
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return IRQ_HANDLED;
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}
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