drm/tegra: dsi: Make FIFO depths host parameters

Rather than hardcoding them as macros, make the host and video FIFO
depths parameters so that they can be more easily adjusted if a new
generation of the Tegra SoC changes them.

While at it, set the depth of the video FIFO to the correct value of
1920 *words* rather than *bytes*.

Signed-off-by: Thierry Reding <treding@nvidia.com>

diff --git a/drivers/gpu/drm/tegra/dsi.c b/drivers/gpu/drm/tegra/dsi.c
index f787445..584b771 100644 (file)
--- a/drivers/gpu/drm/tegra/dsi.c
+++ b/drivers/gpu/drm/tegra/dsi.c
@@ -26,9 +26,6 @@
 #include "dsi.h"
 #include "mipi-phy.h"
 
-#define DSI_VIDEO_FIFO_DEPTH (1920 / 4)
-#define DSI_HOST_FIFO_DEPTH 64
-
 struct tegra_dsi {
        struct host1x_client client;
        struct tegra_output output;
@@ -54,6 +51,9 @@ struct tegra_dsi {
 
        struct regulator *vdd;
        bool enabled;
+
+       unsigned int video_fifo_depth;
+       unsigned int host_fifo_depth;
 };
 
 static inline struct tegra_dsi *
@@ -467,7 +467,7 @@ static int tegra_output_dsi_enable(struct tegra_output *output)
                DSI_CONTROL_SOURCE(dc->pipe);
        tegra_dsi_writel(dsi, value, DSI_CONTROL);
 
-       tegra_dsi_writel(dsi, DSI_VIDEO_FIFO_DEPTH, DSI_MAX_THRESHOLD);
+       tegra_dsi_writel(dsi, dsi->video_fifo_depth, DSI_MAX_THRESHOLD);
 
        value = DSI_HOST_CONTROL_HS | DSI_HOST_CONTROL_CS |
                DSI_HOST_CONTROL_ECC;
@@ -843,6 +843,8 @@ static int tegra_dsi_probe(struct platform_device *pdev)
                return -ENOMEM;
 
        dsi->output.dev = dsi->dev = &pdev->dev;
+       dsi->video_fifo_depth = 1920;
+       dsi->host_fifo_depth = 64;
 
        err = tegra_output_probe(&dsi->output);
        if (err < 0)