Merge tag 'exynos-drm-next-for-v5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos into drm-next

Two cleanups
- These patches make Exynos DRM driver to use pm_runtime_resume_and_get()
function instead of m_runtime_get_sync() to deal with usage counter.
pm_runtime_get_sync() increases the usage counter even when it failed,
which could make callers to forget to decrease the usage counter.
pm_runtime_resume_and_get() decreases the usage counter regardless of
whether it failed or not.

Signed-off-by: Dave Airlie <[e-mail]>

From: Inki Dae <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/exynos/exynos5433_drm_decon.c

···
 static void decon_atomic_enable(struct exynos_drm_crtc *crtc)
 {
 	struct decon_context *ctx = crtc->ctx;
+	int ret;
 
-	pm_runtime_get_sync(ctx->dev);
+	ret = pm_runtime_resume_and_get(ctx->dev);
+	if (ret < 0) {
+		DRM_DEV_ERROR(ctx->dev, "failed to enable DECON device.\n");
+		return;
+	}
 
 	exynos_drm_pipe_clk_enable(crtc, true);
 

drivers/gpu/drm/exynos/exynos7_drm_decon.c

···
 static void decon_atomic_enable(struct exynos_drm_crtc *crtc)
 {
 	struct decon_context *ctx = crtc->ctx;
+	int ret;
 
 	if (!ctx->suspended)
 		return;
 
-	pm_runtime_get_sync(ctx->dev);
+	ret = pm_runtime_resume_and_get(ctx->dev);
+	if (ret < 0) {
+		DRM_DEV_ERROR(ctx->dev, "failed to enable DECON device.\n");
+		return;
+	}
 
 	decon_init(ctx);
 

drivers/gpu/drm/exynos/exynos_drm_dsi.c

···
 	if (dsi->state & DSIM_STATE_ENABLED)
 		return;
 
-	pm_runtime_get_sync(dsi->dev);
+	ret = pm_runtime_resume_and_get(dsi->dev);
+	if (ret < 0) {
+		dev_err(dsi->dev, "failed to enable DSI device.\n");
+		return;
+	}
+
 	dsi->state |= DSIM_STATE_ENABLED;
 
 	if (dsi->panel) {

drivers/gpu/drm/exynos/exynos_drm_fimc.c

···
 {
 	struct fimc_context *ctx =
 			container_of(ipp, struct fimc_context, ipp);
+	int ret;
 
-	pm_runtime_get_sync(ctx->dev);
+	ret = pm_runtime_resume_and_get(ctx->dev);
+	if (ret < 0) {
+		dev_err(ctx->dev, "failed to enable FIMC device.\n");
+		return ret;
+	}
+
 	ctx->task = task;
 
 	fimc_src_set_fmt(ctx, task->src.buf.fourcc, task->src.buf.modifier);

drivers/gpu/drm/exynos/exynos_drm_fimd.c

···
 	writel(val, ctx->regs + SHADOWCON);
 }
 
-static void fimd_clear_channels(struct exynos_drm_crtc *crtc)
+static int fimd_clear_channels(struct exynos_drm_crtc *crtc)
 {
 	struct fimd_context *ctx = crtc->ctx;
 	unsigned int win, ch_enabled = 0;
+	int ret;
 
 	/* Hardware is in unknown state, so ensure it gets enabled properly */
-	pm_runtime_get_sync(ctx->dev);
+	ret = pm_runtime_resume_and_get(ctx->dev);
+	if (ret < 0) {
+		dev_err(ctx->dev, "failed to enable FIMD device.\n");
+		return ret;
+	}
 
 	clk_prepare_enable(ctx->bus_clk);
 	clk_prepare_enable(ctx->lcd_clk);
···
 	clk_disable_unprepare(ctx->bus_clk);
 
 	pm_runtime_put(ctx->dev);
+
+	return 0;
 }
 
 
···
 
 	ctx->suspended = false;
 
-	pm_runtime_get_sync(ctx->dev);
+	if (pm_runtime_resume_and_get(ctx->dev) < 0) {
+		dev_warn(ctx->dev, "failed to enable FIMD device.\n");
+		return;
+	}
 
 	/* if vblank was enabled status, enable it again. */
 	if (test_and_clear_bit(0, &ctx->irq_flags))
···
 	if (ctx->encoder)
 		exynos_dpi_bind(drm_dev, ctx->encoder);
 
-	if (is_drm_iommu_supported(drm_dev))
-		fimd_clear_channels(ctx->crtc);
+	if (is_drm_iommu_supported(drm_dev)) {
+		int ret;
+
+		ret = fimd_clear_channels(ctx->crtc);
+		if (ret < 0)
+			return ret;
+	}
 
 	return exynos_drm_register_dma(drm_dev, dev, &ctx->dma_priv);
 }

drivers/gpu/drm/exynos/exynos_drm_g2d.c

···
 		g2d->runqueue_node = g2d_get_runqueue_node(g2d);
 
 		if (g2d->runqueue_node) {
-			pm_runtime_get_sync(g2d->dev);
+			int ret;
+
+			ret = pm_runtime_resume_and_get(g2d->dev);
+			if (ret < 0) {
+				dev_err(g2d->dev, "failed to enable G2D device.\n");
+				return;
+			}
+
 			g2d_dma_start(g2d, g2d->runqueue_node);
 		}
 	}

drivers/gpu/drm/exynos/exynos_drm_gsc.c

···
 	struct gsc_context *ctx = container_of(ipp, struct gsc_context, ipp);
 	int ret;
 
-	pm_runtime_get_sync(ctx->dev);
+	ret = pm_runtime_resume_and_get(ctx->dev);
+	if (ret < 0) {
+		dev_err(ctx->dev, "failed to enable GScaler device.\n");
+		return ret;
+	}
+
 	ctx->task = task;
 
 	ret = gsc_reset(ctx);

drivers/gpu/drm/exynos/exynos_drm_mic.c

···
 	if (mic->enabled)
 		goto unlock;
 
-	ret = pm_runtime_get_sync(mic->dev);
-	if (ret < 0) {
-		pm_runtime_put_noidle(mic->dev);
+	ret = pm_runtime_resume_and_get(mic->dev);
+	if (ret < 0)
 		goto unlock;
-	}
 
 	mic_set_path(mic, 1);
 

drivers/gpu/drm/exynos/exynos_drm_rotator.c

···
 {
 	struct rot_context *rot =
 			container_of(ipp, struct rot_context, ipp);
+	int ret;
 
-	pm_runtime_get_sync(rot->dev);
+	ret = pm_runtime_resume_and_get(rot->dev);
+	if (ret < 0) {
+		dev_err(rot->dev, "failed to enable ROTATOR device.\n");
+		return ret;
+	}
 	rot->task = task;
 
 	rotator_src_set_fmt(rot, task->src.buf.fourcc);

drivers/gpu/drm/exynos/exynos_drm_scaler.c

···
 	struct drm_exynos_ipp_task_rect *src_pos = &task->src.rect;
 	struct drm_exynos_ipp_task_rect *dst_pos = &task->dst.rect;
 	const struct scaler_format *src_fmt, *dst_fmt;
+	int ret = 0;
 
 	src_fmt = scaler_get_format(task->src.buf.fourcc);
 	dst_fmt = scaler_get_format(task->dst.buf.fourcc);
 
-	pm_runtime_get_sync(scaler->dev);
-	if (scaler_reset(scaler)) {
-		pm_runtime_put(scaler->dev);
+	ret = pm_runtime_resume_and_get(scaler->dev);
+	if (ret < 0)
+		return ret;
+
+	if (scaler_reset(scaler))
 		return -EIO;
-	}
 
 	scaler->task = task;
 

drivers/gpu/drm/exynos/exynos_hdmi.c

···
 /* Should be called with hdata->mutex mutex held. */
 static void hdmiphy_enable(struct hdmi_context *hdata)
 {
+	int ret;
+
 	if (hdata->powered)
 		return;
 
-	pm_runtime_get_sync(hdata->dev);
+	ret = pm_runtime_resume_and_get(hdata->dev);
+	if (ret < 0) {
+		dev_err(hdata->dev, "failed to enable HDMIPHY device.\n");
+		return;
+	}
 
 	if (regulator_bulk_enable(ARRAY_SIZE(supply), hdata->regul_bulk))
 		DRM_DEV_DEBUG_KMS(hdata->dev,

drivers/gpu/drm/exynos/exynos_mixer.c

···
 static void mixer_atomic_enable(struct exynos_drm_crtc *crtc)
 {
 	struct mixer_context *ctx = crtc->ctx;
+	int ret;
 
 	if (test_bit(MXR_BIT_POWERED, &ctx->flags))
 		return;
 
-	pm_runtime_get_sync(ctx->dev);
+	ret = pm_runtime_resume_and_get(ctx->dev);
+	if (ret < 0) {
+		dev_err(ctx->dev, "failed to enable MIXER device.\n");
+		return;
+	}
 
 	exynos_drm_pipe_clk_enable(crtc, true);