The driver uses bool protected by mutex to track power state. The patch replaces this combo with single bit and atomic bitops.
Signed-off-by: Andrzej Hajda a.hajda@samsung.com --- drivers/gpu/drm/exynos/exynos_mixer.c | 52 ++++++++++------------------------- 1 file changed, 14 insertions(+), 38 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos_mixer.c b/drivers/gpu/drm/exynos/exynos_mixer.c index 53bcb70..453b6bb 100644 --- a/drivers/gpu/drm/exynos/exynos_mixer.c +++ b/drivers/gpu/drm/exynos/exynos_mixer.c @@ -69,6 +69,10 @@ enum mixer_version_id { MXR_VER_128_0_0_184, };
+enum mixer_flag_bits { + MXR_BIT_POWERED, +}; + struct mixer_context { struct platform_device *pdev; struct device *dev; @@ -76,13 +80,12 @@ struct mixer_context { struct exynos_drm_crtc *crtc; struct exynos_drm_plane planes[MIXER_WIN_NR]; int pipe; + unsigned long flags; bool interlace; - bool powered; bool vp_enabled; bool has_sclk; u32 int_en;
- struct mutex mixer_mutex; struct mixer_resources mixer_res; enum mixer_version_id mxr_ver; wait_queue_head_t wait_vsync_queue; @@ -899,7 +902,7 @@ static int mixer_enable_vblank(struct exynos_drm_crtc *crtc) struct mixer_context *mixer_ctx = crtc->ctx; struct mixer_resources *res = &mixer_ctx->mixer_res;
- if (!mixer_ctx->powered) { + if (!test_bit(MXR_BIT_POWERED, &mixer_ctx->flags)) { mixer_ctx->int_en |= MXR_INT_EN_VSYNC; return 0; } @@ -916,7 +919,7 @@ static void mixer_disable_vblank(struct exynos_drm_crtc *crtc) struct mixer_context *mixer_ctx = crtc->ctx; struct mixer_resources *res = &mixer_ctx->mixer_res;
- if (!mixer_ctx->powered) { + if (!test_bit(MXR_BIT_POWERED, &mixer_ctx->flags)) { mixer_ctx->int_en &= MXR_INT_EN_VSYNC; return; } @@ -932,12 +935,8 @@ static void mixer_win_commit(struct exynos_drm_crtc *crtc, unsigned int win)
DRM_DEBUG_KMS("win: %d\n", win);
- mutex_lock(&mixer_ctx->mixer_mutex); - if (!mixer_ctx->powered) { - mutex_unlock(&mixer_ctx->mixer_mutex); + if (!test_bit(MXR_BIT_POWERED, &mixer_ctx->flags)) return; - } - mutex_unlock(&mixer_ctx->mixer_mutex);
if (win > 1 && mixer_ctx->vp_enabled) vp_video_buffer(mixer_ctx, win); @@ -953,12 +952,8 @@ static void mixer_win_disable(struct exynos_drm_crtc *crtc, unsigned int win)
DRM_DEBUG_KMS("win: %d\n", win);
- mutex_lock(&mixer_ctx->mixer_mutex); - if (!mixer_ctx->powered) { - mutex_unlock(&mixer_ctx->mixer_mutex); + if (!test_bit(MXR_BIT_POWERED, &mixer_ctx->flags)) return; - } - mutex_unlock(&mixer_ctx->mixer_mutex);
spin_lock_irqsave(&res->reg_slock, flags); mixer_vsync_set_update(mixer_ctx, false); @@ -974,12 +969,8 @@ static void mixer_wait_for_vblank(struct exynos_drm_crtc *crtc) struct mixer_context *mixer_ctx = crtc->ctx; int err;
- mutex_lock(&mixer_ctx->mixer_mutex); - if (!mixer_ctx->powered) { - mutex_unlock(&mixer_ctx->mixer_mutex); + if (!test_bit(MXR_BIT_POWERED, &mixer_ctx->flags)) return; - } - mutex_unlock(&mixer_ctx->mixer_mutex);
err = drm_vblank_get(mixer_ctx->drm_dev, mixer_ctx->pipe); if (err < 0) { @@ -1007,13 +998,8 @@ static void mixer_enable(struct exynos_drm_crtc *crtc) struct mixer_resources *res = &ctx->mixer_res; int ret;
- mutex_lock(&ctx->mixer_mutex); - if (ctx->powered) { - mutex_unlock(&ctx->mixer_mutex); + if (test_bit(MXR_BIT_POWERED, &ctx->flags)) return; - } - - mutex_unlock(&ctx->mixer_mutex);
pm_runtime_get_sync(ctx->dev);
@@ -1045,9 +1031,7 @@ static void mixer_enable(struct exynos_drm_crtc *crtc) } }
- mutex_lock(&ctx->mixer_mutex); - ctx->powered = true; - mutex_unlock(&ctx->mixer_mutex); + set_bit(MXR_BIT_POWERED, &ctx->flags);
mixer_reg_writemask(res, MXR_STATUS, ~0, MXR_STATUS_SOFT_RESET);
@@ -1063,12 +1047,8 @@ static void mixer_disable(struct exynos_drm_crtc *crtc) struct mixer_resources *res = &ctx->mixer_res; int i;
- mutex_lock(&ctx->mixer_mutex); - if (!ctx->powered) { - mutex_unlock(&ctx->mixer_mutex); + if (!test_bit(MXR_BIT_POWERED, &ctx->flags)) return; - } - mutex_unlock(&ctx->mixer_mutex);
mixer_stop(ctx); mixer_regs_dump(ctx); @@ -1078,9 +1058,7 @@ static void mixer_disable(struct exynos_drm_crtc *crtc)
ctx->int_en = mixer_reg_read(res, MXR_INT_EN);
- mutex_lock(&ctx->mixer_mutex); - ctx->powered = false; - mutex_unlock(&ctx->mixer_mutex); + clear_bit(MXR_BIT_POWERED, &ctx->flags);
clk_disable_unprepare(res->hdmi); clk_disable_unprepare(res->mixer); @@ -1242,8 +1220,6 @@ static int mixer_probe(struct platform_device *pdev) return -ENOMEM; }
- mutex_init(&ctx->mixer_mutex); - if (dev->of_node) { const struct of_device_id *match;