drm/tegra: dsi - Remove unneeded code

A bunch of registers are initialized to 0 upon during driver probe. It
turns out that none of these are actually needed, so they can simply be
dropped.

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 71c1b1a64ccf3da2b3d9bef9bb5823cfbe0bfd0d..5e2bd843dbe23d87b821b74cf63e8c2e74c80421 100644 (file)
--- a/drivers/gpu/drm/tegra/dsi.c
+++ b/drivers/gpu/drm/tegra/dsi.c
@@ -644,7 +644,6 @@ static int tegra_dsi_init(struct host1x_client *client)
 {
        struct tegra_drm *tegra = dev_get_drvdata(client->parent);
        struct tegra_dsi *dsi = host1x_client_to_dsi(client);
-       unsigned long value, i;
        int err;
 
        dsi->output.type = TEGRA_OUTPUT_DSI;
@@ -663,40 +662,12 @@ static int tegra_dsi_init(struct host1x_client *client)
                        dev_err(dsi->dev, "debugfs setup failed: %d\n", err);
        }
 
-       /*
-        * enable high-speed mode, checksum generation, ECC generation and
-        * disable raw mode
-        */
-       value = tegra_dsi_readl(dsi, DSI_HOST_CONTROL);
-       value |= DSI_HOST_CONTROL_ECC | DSI_HOST_CONTROL_CS |
-                DSI_HOST_CONTROL_HS;
-       value &= ~DSI_HOST_CONTROL_RAW;
-       tegra_dsi_writel(dsi, value, DSI_HOST_CONTROL);
-
-       tegra_dsi_writel(dsi, 0, DSI_SOL_DELAY);
-       tegra_dsi_writel(dsi, 0, DSI_MAX_THRESHOLD);
-
-       tegra_dsi_writel(dsi, 0, DSI_INIT_SEQ_CONTROL);
-
-       for (i = 0; i < 8; i++) {
-               tegra_dsi_writel(dsi, 0, DSI_INIT_SEQ_DATA_0 + i);
-               tegra_dsi_writel(dsi, 0, DSI_INIT_SEQ_DATA_8 + i);
-       }
-
-       for (i = 0; i < 12; i++)
-               tegra_dsi_writel(dsi, 0, DSI_PKT_SEQ_0_LO + i);
-
-       tegra_dsi_writel(dsi, 0, DSI_DCS_CMDS);
-
        err = tegra_dsi_pad_calibrate(dsi);
        if (err < 0) {
                dev_err(dsi->dev, "MIPI calibration failed: %d\n", err);
                return err;
        }
 
-       tegra_dsi_writel(dsi, DSI_POWER_CONTROL_ENABLE, DSI_POWER_CONTROL);
-       usleep_range(300, 1000);
-
        return 0;
 }
 
@@ -747,60 +718,6 @@ static int tegra_dsi_setup_clocks(struct tegra_dsi *dsi)
        return 0;
 }
 
-static void tegra_dsi_initialize(struct tegra_dsi *dsi)
-{
-       unsigned int i;
-
-       tegra_dsi_writel(dsi, 0, DSI_POWER_CONTROL);
-
-       tegra_dsi_writel(dsi, 0, DSI_INT_ENABLE);
-       tegra_dsi_writel(dsi, 0, DSI_INT_STATUS);
-       tegra_dsi_writel(dsi, 0, DSI_INT_MASK);
-
-       tegra_dsi_writel(dsi, 0, DSI_HOST_CONTROL);
-       tegra_dsi_writel(dsi, 0, DSI_CONTROL);
-
-       tegra_dsi_writel(dsi, 0, DSI_SOL_DELAY);
-       tegra_dsi_writel(dsi, 0, DSI_MAX_THRESHOLD);
-
-       tegra_dsi_writel(dsi, 0, DSI_INIT_SEQ_CONTROL);
-
-       for (i = 0; i < 8; i++) {
-               tegra_dsi_writel(dsi, 0, DSI_INIT_SEQ_DATA_0 + i);
-               tegra_dsi_writel(dsi, 0, DSI_INIT_SEQ_DATA_8 + i);
-       }
-
-       for (i = 0; i < 12; i++)
-               tegra_dsi_writel(dsi, 0, DSI_PKT_SEQ_0_LO + i);
-
-       tegra_dsi_writel(dsi, 0, DSI_DCS_CMDS);
-
-       for (i = 0; i < 4; i++)
-               tegra_dsi_writel(dsi, 0, DSI_PKT_LEN_0_1 + i);
-
-       tegra_dsi_writel(dsi, 0x00000000, DSI_PHY_TIMING_0);
-       tegra_dsi_writel(dsi, 0x00000000, DSI_PHY_TIMING_1);
-       tegra_dsi_writel(dsi, 0x000000ff, DSI_PHY_TIMING_2);
-       tegra_dsi_writel(dsi, 0x00000000, DSI_BTA_TIMING);
-
-       tegra_dsi_writel(dsi, 0, DSI_TIMEOUT_0);
-       tegra_dsi_writel(dsi, 0, DSI_TIMEOUT_1);
-       tegra_dsi_writel(dsi, 0, DSI_TO_TALLY);
-
-       tegra_dsi_writel(dsi, 0, DSI_PAD_CONTROL_0);
-       tegra_dsi_writel(dsi, 0, DSI_PAD_CONTROL_CD);
-       tegra_dsi_writel(dsi, 0, DSI_PAD_CD_STATUS);
-       tegra_dsi_writel(dsi, 0, DSI_VIDEO_MODE_CONTROL);
-       tegra_dsi_writel(dsi, 0, DSI_PAD_CONTROL_1);
-       tegra_dsi_writel(dsi, 0, DSI_PAD_CONTROL_2);
-       tegra_dsi_writel(dsi, 0, DSI_PAD_CONTROL_3);
-       tegra_dsi_writel(dsi, 0, DSI_PAD_CONTROL_4);
-
-       tegra_dsi_writel(dsi, 0, DSI_GANGED_MODE_CONTROL);
-       tegra_dsi_writel(dsi, 0, DSI_GANGED_MODE_START);
-       tegra_dsi_writel(dsi, 0, DSI_GANGED_MODE_SIZE);
-}
-
 static int tegra_dsi_host_attach(struct mipi_dsi_host *host,
                                 struct mipi_dsi_device *device)
 {
@@ -915,8 +832,6 @@ static int tegra_dsi_probe(struct platform_device *pdev)
        if (IS_ERR(dsi->regs))
                return PTR_ERR(dsi->regs);
 
-       tegra_dsi_initialize(dsi);
-
        dsi->mipi = tegra_mipi_request(&pdev->dev);
        if (IS_ERR(dsi->mipi))
                return PTR_ERR(dsi->mipi);