From 08e3211251e36a506ff6b0c31620e362b5800f47 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Tue, 6 Feb 2018 10:35:39 +0100 Subject: [PATCH] drm/pl111: Support variants with broken VBLANK The early Integrator CLCD synthesized in the Integrator CP and IM-PD1 FPGAs are broken: their vertical and next base interrupts are not functional. Support these variants by simply disabling the use of the vblank interrupt on these variants. Reviewed-by: Eric Anholt Signed-off-by: Linus Walleij Link: https://patchwork.freedesktop.org/patch/msgid/20180206093540.8147-4-linus.walleij@linaro.org --- drivers/gpu/drm/pl111/pl111_display.c | 6 ++++-- drivers/gpu/drm/pl111/pl111_drm.h | 2 ++ drivers/gpu/drm/pl111/pl111_drv.c | 19 +++++++++++-------- drivers/gpu/drm/pl111/pl111_versatile.c | 1 + 4 files changed, 18 insertions(+), 10 deletions(-) diff --git a/drivers/gpu/drm/pl111/pl111_display.c b/drivers/gpu/drm/pl111/pl111_display.c index 4d4e38b..d759238 100644 --- a/drivers/gpu/drm/pl111/pl111_display.c +++ b/drivers/gpu/drm/pl111/pl111_display.c @@ -256,7 +256,8 @@ static void pl111_display_enable(struct drm_simple_display_pipe *pipe, cntl |= CNTL_LCDPWR; writel(cntl, priv->regs + priv->ctrl); - drm_crtc_vblank_on(crtc); + if (!priv->variant->broken_vblank) + drm_crtc_vblank_on(crtc); } void pl111_display_disable(struct drm_simple_display_pipe *pipe) @@ -266,7 +267,8 @@ void pl111_display_disable(struct drm_simple_display_pipe *pipe) struct pl111_drm_dev_private *priv = drm->dev_private; u32 cntl; - drm_crtc_vblank_off(crtc); + if (!priv->variant->broken_vblank) + drm_crtc_vblank_off(crtc); /* Power Down */ cntl = readl(priv->regs + priv->ctrl); diff --git a/drivers/gpu/drm/pl111/pl111_drm.h b/drivers/gpu/drm/pl111/pl111_drm.h index a9b1819..6d0e450 100644 --- a/drivers/gpu/drm/pl111/pl111_drm.h +++ b/drivers/gpu/drm/pl111/pl111_drm.h @@ -40,6 +40,7 @@ struct drm_minor; * BGR/RGB routing * @broken_clockdivider: the clock divider is broken and we need to * use the supplied clock directly + * @broken_vblank: the vblank IRQ is broken on this variant * @formats: array of supported pixel formats on this variant * @nformats: the length of the array of supported pixel formats */ @@ -48,6 +49,7 @@ struct pl111_variant_data { bool is_pl110; bool external_bgr; bool broken_clockdivider; + bool broken_vblank; const u32 *formats; unsigned int nformats; }; diff --git a/drivers/gpu/drm/pl111/pl111_drv.c b/drivers/gpu/drm/pl111/pl111_drv.c index ad8dfea..94fbc7c 100644 --- a/drivers/gpu/drm/pl111/pl111_drv.c +++ b/drivers/gpu/drm/pl111/pl111_drv.c @@ -132,10 +132,12 @@ static int pl111_modeset_init(struct drm_device *dev) if (ret) return ret; - ret = drm_vblank_init(dev, 1); - if (ret != 0) { - dev_err(dev->dev, "Failed to init vblank\n"); - goto out_bridge; + if (!priv->variant->broken_vblank) { + ret = drm_vblank_init(dev, 1); + if (ret != 0) { + dev_err(dev->dev, "Failed to init vblank\n"); + goto out_bridge; + } } drm_mode_config_reset(dev); @@ -172,10 +174,6 @@ static struct drm_driver pl111_drm_driver = { .dumb_create = drm_gem_cma_dumb_create, .gem_free_object_unlocked = drm_gem_cma_free_object, .gem_vm_ops = &drm_gem_cma_vm_ops, - - .enable_vblank = pl111_enable_vblank, - .disable_vblank = pl111_disable_vblank, - .prime_handle_to_fd = drm_gem_prime_handle_to_fd, .prime_fd_to_handle = drm_gem_prime_fd_to_handle, .gem_prime_import = drm_gem_prime_import, @@ -201,6 +199,11 @@ static int pl111_amba_probe(struct amba_device *amba_dev, if (!priv) return -ENOMEM; + if (!variant->broken_vblank) { + pl111_drm_driver.enable_vblank = pl111_enable_vblank; + pl111_drm_driver.disable_vblank = pl111_disable_vblank; + } + drm = drm_dev_alloc(&pl111_drm_driver, dev); if (IS_ERR(drm)) return PTR_ERR(drm); diff --git a/drivers/gpu/drm/pl111/pl111_versatile.c b/drivers/gpu/drm/pl111/pl111_versatile.c index 4b0a548..05a4b89 100644 --- a/drivers/gpu/drm/pl111/pl111_versatile.c +++ b/drivers/gpu/drm/pl111/pl111_versatile.c @@ -238,6 +238,7 @@ static const struct pl111_variant_data pl110_integrator = { .name = "PL110 Integrator", .is_pl110 = true, .broken_clockdivider = true, + .broken_vblank = true, .formats = pl110_integrator_pixel_formats, .nformats = ARRAY_SIZE(pl110_integrator_pixel_formats), }; -- 2.7.4