From: Gustavo Padovan gustavo.padovan@collabora.co.uk
Let pm_runtime handle the enabling/disabling of the device with proper refcnt instead of rely on specific flags to track the enabled state.
Changelog v2: - Modify CONFIG_PM_SLEEP -> CONFIG_PM
Signed-off-by: Gustavo Padovan gustavo.padovan@collabora.co.uk Signed-off-by: Inki Dae inki.dae@samsung.com --- drivers/gpu/drm/exynos/exynos7_drm_decon.c | 125 ++++++++++++----------------- 1 file changed, 53 insertions(+), 72 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos7_drm_decon.c b/drivers/gpu/drm/exynos/exynos7_drm_decon.c index ead2b16..3119aba 100644 --- a/drivers/gpu/drm/exynos/exynos7_drm_decon.c +++ b/drivers/gpu/drm/exynos/exynos7_drm_decon.c @@ -54,7 +54,6 @@ struct decon_context { void __iomem *regs; unsigned long irq_flags; bool i80_if; - bool suspended; int pipe; wait_queue_head_t wait_vsync_queue; atomic_t wait_vsync_event; @@ -85,9 +84,6 @@ static void decon_wait_for_vblank(struct exynos_drm_crtc *crtc) { struct decon_context *ctx = crtc->ctx;
- if (ctx->suspended) - return; - atomic_set(&ctx->wait_vsync_event, 1);
/* @@ -119,13 +115,8 @@ static void decon_clear_channels(struct exynos_drm_crtc *crtc) }
/* Wait for vsync, as disable channel takes effect at next vsync */ - if (ch_enabled) { - unsigned int state = ctx->suspended; - - ctx->suspended = 0; + if (ch_enabled) decon_wait_for_vblank(ctx->crtc); - ctx->suspended = state; - } }
static int decon_ctx_initialize(struct decon_context *ctx, @@ -170,9 +161,6 @@ static void decon_commit(struct exynos_drm_crtc *crtc) struct drm_display_mode *mode = &crtc->base.state->adjusted_mode; u32 val, clkdiv;
- if (ctx->suspended) - return; - /* nothing to do if we haven't set the mode yet */ if (mode->htotal == 0 || mode->vtotal == 0) return; @@ -234,9 +222,6 @@ static int decon_enable_vblank(struct exynos_drm_crtc *crtc) struct decon_context *ctx = crtc->ctx; u32 val;
- if (ctx->suspended) - return -EPERM; - if (!test_and_set_bit(0, &ctx->irq_flags)) { val = readl(ctx->regs + VIDINTCON0);
@@ -259,9 +244,6 @@ static void decon_disable_vblank(struct exynos_drm_crtc *crtc) struct decon_context *ctx = crtc->ctx; u32 val;
- if (ctx->suspended) - return; - if (test_and_clear_bit(0, &ctx->irq_flags)) { val = readl(ctx->regs + VIDINTCON0);
@@ -389,9 +371,6 @@ static void decon_atomic_begin(struct exynos_drm_crtc *crtc, { struct decon_context *ctx = crtc->ctx;
- if (ctx->suspended) - return; - decon_shadow_protect_win(ctx, plane->zpos, true); }
@@ -409,9 +388,6 @@ static void decon_update_plane(struct exynos_drm_crtc *crtc, unsigned int bpp = state->fb->bits_per_pixel >> 3; unsigned int pitch = state->fb->pitches[0];
- if (ctx->suspended) - return; - /* * SHADOWCON/PRTCON register is used for enabling timing. * @@ -508,9 +484,6 @@ static void decon_disable_plane(struct exynos_drm_crtc *crtc, unsigned int win = plane->zpos; u32 val;
- if (ctx->suspended) - return; - /* protect windows */ decon_shadow_protect_win(ctx, win, true);
@@ -529,9 +502,6 @@ static void decon_atomic_flush(struct exynos_drm_crtc *crtc, { struct decon_context *ctx = crtc->ctx;
- if (ctx->suspended) - return; - decon_shadow_protect_win(ctx, plane->zpos, false); }
@@ -555,39 +525,9 @@ static void decon_init(struct decon_context *ctx) static void decon_enable(struct exynos_drm_crtc *crtc) { struct decon_context *ctx = crtc->ctx; - int ret; - - if (!ctx->suspended) - return; - - ctx->suspended = false;
pm_runtime_get_sync(ctx->dev);
- ret = clk_prepare_enable(ctx->pclk); - if (ret < 0) { - DRM_ERROR("Failed to prepare_enable the pclk [%d]\n", ret); - return; - } - - ret = clk_prepare_enable(ctx->aclk); - if (ret < 0) { - DRM_ERROR("Failed to prepare_enable the aclk [%d]\n", ret); - return; - } - - ret = clk_prepare_enable(ctx->eclk); - if (ret < 0) { - DRM_ERROR("Failed to prepare_enable the eclk [%d]\n", ret); - return; - } - - ret = clk_prepare_enable(ctx->vclk); - if (ret < 0) { - DRM_ERROR("Failed to prepare_enable the vclk [%d]\n", ret); - return; - } - decon_init(ctx);
/* if vblank was enabled status, enable it again. */ @@ -602,9 +542,6 @@ static void decon_disable(struct exynos_drm_crtc *crtc) struct decon_context *ctx = crtc->ctx; int i;
- if (ctx->suspended) - return; - /* * We need to make sure that all windows are disabled before we * suspend that connector. Otherwise we might try to scan from @@ -613,14 +550,7 @@ static void decon_disable(struct exynos_drm_crtc *crtc) for (i = 0; i < WINDOWS_NR; i++) decon_disable_plane(crtc, &ctx->planes[i]);
- clk_disable_unprepare(ctx->vclk); - clk_disable_unprepare(ctx->eclk); - clk_disable_unprepare(ctx->aclk); - clk_disable_unprepare(ctx->pclk); - pm_runtime_put_sync(ctx->dev); - - ctx->suspended = true; }
static const struct exynos_drm_crtc_ops decon_crtc_ops = { @@ -748,7 +678,6 @@ static int decon_probe(struct platform_device *pdev) return -ENOMEM;
ctx->dev = dev; - ctx->suspended = true;
i80_if_timings = of_get_child_by_name(dev->of_node, "i80-if-timings"); if (i80_if_timings) @@ -843,11 +772,63 @@ static int decon_remove(struct platform_device *pdev) return 0; }
+#ifdef CONFIG_PM +static int exynos7_decon_suspend(struct device *dev) +{ + struct decon_context *ctx = dev_get_drvdata(dev); + + clk_disable_unprepare(ctx->vclk); + clk_disable_unprepare(ctx->eclk); + clk_disable_unprepare(ctx->aclk); + clk_disable_unprepare(ctx->pclk); + + return 0; +} + +static int exynos7_decon_resume(struct device *dev) +{ + struct decon_context *ctx = dev_get_drvdata(dev); + int ret; + + ret = clk_prepare_enable(ctx->pclk); + if (ret < 0) { + DRM_ERROR("Failed to prepare_enable the pclk [%d]\n", ret); + return ret; + } + + ret = clk_prepare_enable(ctx->aclk); + if (ret < 0) { + DRM_ERROR("Failed to prepare_enable the aclk [%d]\n", ret); + return ret; + } + + ret = clk_prepare_enable(ctx->eclk); + if (ret < 0) { + DRM_ERROR("Failed to prepare_enable the eclk [%d]\n", ret); + return ret; + } + + ret = clk_prepare_enable(ctx->vclk); + if (ret < 0) { + DRM_ERROR("Failed to prepare_enable the vclk [%d]\n", ret); + return ret; + } + + return 0; +} +#endif + +static const struct dev_pm_ops exynos7_decon_pm_ops = { + SET_RUNTIME_PM_OPS(exynos7_decon_suspend, exynos7_decon_resume, + NULL) +}; + struct platform_driver decon_driver = { .probe = decon_probe, .remove = decon_remove, .driver = { .name = "exynos-decon", + .pm = &exynos7_decon_pm_ops, .of_match_table = decon_driver_dt_match, }, };