drm: exynos: hdmi: add support for exynos5 mixer

This patch adds support for exynos5 mixer with device tree enabled.

Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
Signed-off-by: Fahad Kunnathadi <fahad.k@samsung.com>
Signed-off-by: Kyungmin.park <kyungmin.park@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

2 files changed, 49 insertions, 3 deletions

diff --git a/drivers/gpu/drm/exynos/exynos_mixer.c b/drivers/gpu/drm/exynos/exynos_mixer.c
index 167734529229..39d2b95087ae 100644
--- a/drivers/gpu/drm/exynos/exynos_mixer.c
+++ b/drivers/gpu/drm/exynos/exynos_mixer.c
@@ -481,6 +481,18 @@ static void vp_video_buffer(struct mixer_context *ctx, int win)
         vp_regs_dump(ctx);
 }
 
+static void mixer_layer_update(struct mixer_context *ctx)
+{
+        struct mixer_resources *res = &ctx->mixer_res;
+        u32 val;
+
+        val = mixer_reg_read(res, MXR_CFG);
+
+        /* allow one update per vsync only */
+        if (!(val & MXR_CFG_LAYER_UPDATE_COUNT_MASK))
+                mixer_reg_writemask(res, MXR_CFG, ~0, MXR_CFG_LAYER_UPDATE);
+}
+
 static void mixer_graph_buffer(struct mixer_context *ctx, int win)
 {
         struct mixer_resources *res = &ctx->mixer_res;
@@ -561,6 +573,11 @@ static void mixer_graph_buffer(struct mixer_context *ctx, int win)
         mixer_cfg_scan(ctx, win_data->mode_height);
         mixer_cfg_rgb_fmt(ctx, win_data->mode_height);
         mixer_cfg_layer(ctx, win, true);
+
+        /* layer update mandatory for mixer 16.0.33.0 */
+        if (ctx->mxr_ver == MXR_VER_16_0_33_0)
+                mixer_layer_update(ctx);
+
         mixer_run(ctx);
 
         mixer_vsync_set_update(ctx, true);
@@ -1065,6 +1082,11 @@ fail:
         return ret;
 }
 
+static struct mixer_drv_data exynos5_mxr_drv_data = {
+        .version = MXR_VER_16_0_33_0,
+        .is_vp_enabled = 0,
+};
+
 static struct mixer_drv_data exynos4_mxr_drv_data = {
         .version = MXR_VER_0_0_0_16,
         .is_vp_enabled = 1,
@@ -1075,6 +1097,18 @@ static struct platform_device_id mixer_driver_types[] = {
                 .name           = "s5p-mixer",
                 .driver_data    = (unsigned long)&exynos4_mxr_drv_data,
         }, {
+                .name           = "exynos5-mixer",
+                .driver_data    = (unsigned long)&exynos5_mxr_drv_data,
+        }, {
+                /* end node */
+        }
+};
+
+static struct of_device_id mixer_match_types[] = {
+        {
+                .compatible = "samsung,exynos5-mixer",
+                .data   = &exynos5_mxr_drv_data,
+        }, {
                 /* end node */
         }
 };
@@ -1104,8 +1138,16 @@ static int __devinit mixer_probe(struct platform_device *pdev)
 
         mutex_init(&ctx->mixer_mutex);
 
-        drv = (struct mixer_drv_data *)platform_get_device_id(
-                        pdev)->driver_data;
+        if (dev->of_node) {
+                const struct of_device_id *match;
+                match = of_match_node(of_match_ptr(mixer_match_types),
+                                                          pdev->dev.of_node);
+                drv = match->data;
+        } else {
+                drv = (struct mixer_drv_data *)
+                        platform_get_device_id(pdev)->driver_data;
+        }
+
         ctx->dev = &pdev->dev;
         drm_hdmi_ctx->ctx = (void *)ctx;
         ctx->vp_enabled = drv->is_vp_enabled;
@@ -1167,9 +1209,10 @@ static SIMPLE_DEV_PM_OPS(mixer_pm_ops, mixer_suspend, NULL);
 
 struct platform_driver mixer_driver = {
         .driver = {
-                .name = "s5p-mixer",
+                .name = "exynos-mixer",
                 .owner = THIS_MODULE,
                 .pm = &mixer_pm_ops,
+                .of_match_table = mixer_match_types,
         },
         .probe = mixer_probe,
         .remove = __devexit_p(mixer_remove),
diff --git a/drivers/gpu/drm/exynos/regs-mixer.h b/drivers/gpu/drm/exynos/regs-mixer.h
index fd2f4d14cf6d..5d8dbc0301e6 100644
--- a/drivers/gpu/drm/exynos/regs-mixer.h
+++ b/drivers/gpu/drm/exynos/regs-mixer.h
@@ -69,6 +69,7 @@
         (((val) << (low_bit)) & MXR_MASK(high_bit, low_bit))
 
 /* bits for MXR_STATUS */
+#define MXR_STATUS_SOFT_RESET           (1 << 8)
 #define MXR_STATUS_16_BURST             (1 << 7)
 #define MXR_STATUS_BURST_MASK           (1 << 7)
 #define MXR_STATUS_BIG_ENDIAN           (1 << 3)
@@ -77,6 +78,8 @@
 #define MXR_STATUS_REG_RUN              (1 << 0)
 
 /* bits for MXR_CFG */
+#define MXR_CFG_LAYER_UPDATE            (1 << 31)
+#define MXR_CFG_LAYER_UPDATE_COUNT_MASK (3 << 29)
 #define MXR_CFG_RGB601_0_255            (0 << 9)
 #define MXR_CFG_RGB601_16_235           (1 << 9)
 #define MXR_CFG_RGB709_0_255            (2 << 9)