From bcfc7acbca8d9f40c4b55c6f0dad1519287f81fa Mon Sep 17 00:00:00 2001 From: Thierry Reding Date: Fri, 14 Mar 2014 14:02:28 +0100 Subject: [PATCH] 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 --- drivers/gpu/drm/tegra/dsi.c | 85 ------------------------------------- 1 file changed, 85 deletions(-) diff --git a/drivers/gpu/drm/tegra/dsi.c b/drivers/gpu/drm/tegra/dsi.c index 71c1b1a64ccf..5e2bd843dbe2 100644 --- 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); -- 2.30.2