drm/tegra: dsi: Split out tegra_dsi_set_timeout()
In preparation for adding ganged-mode support, this commit splits out
the tegra_dsi_set_timeout() function so that it can be reused for the
slave DSI controller.
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 50684a4..46fcf62 100644
--- a/drivers/gpu/drm/tegra/dsi.c
+++ b/drivers/gpu/drm/tegra/dsi.c
@@ -681,15 +681,35 @@
return 0;
}
+static void tegra_dsi_set_timeout(struct tegra_dsi *dsi, unsigned long bclk,
+ unsigned int vrefresh)
+{
+ unsigned int timeout;
+ u32 value;
+
+ /* one frame high-speed transmission timeout */
+ timeout = (bclk / vrefresh) / 512;
+ value = DSI_TIMEOUT_LRX(0x2000) | DSI_TIMEOUT_HTX(timeout);
+ tegra_dsi_writel(dsi, value, DSI_TIMEOUT_0);
+
+ /* 2 ms peripheral timeout for panel */
+ timeout = 2 * bclk / 512 * 1000;
+ value = DSI_TIMEOUT_PR(timeout) | DSI_TIMEOUT_TA(0x2000);
+ tegra_dsi_writel(dsi, value, DSI_TIMEOUT_1);
+
+ value = DSI_TALLY_TA(0) | DSI_TALLY_LRX(0) | DSI_TALLY_HTX(0);
+ tegra_dsi_writel(dsi, value, DSI_TO_TALLY);
+}
+
static int tegra_output_dsi_setup_clock(struct tegra_output *output,
struct clk *clk, unsigned long pclk,
unsigned int *divp)
{
struct tegra_dc *dc = to_tegra_dc(output->encoder.crtc);
struct drm_display_mode *mode = &dc->base.mode;
- unsigned int timeout, mul, div, vrefresh;
struct tegra_dsi *dsi = to_dsi(output);
- unsigned long bclk, plld, value;
+ unsigned int mul, div, vrefresh;
+ unsigned long bclk, plld;
int err;
err = tegra_dsi_get_muldiv(dsi->format, &mul, &div);
@@ -744,19 +764,7 @@
* XXX: Move the below somewhere else so that we don't need to have
* access to the vrefresh in this function?
*/
-
- /* one frame high-speed transmission timeout */
- timeout = (bclk / vrefresh) / 512;
- value = DSI_TIMEOUT_LRX(0x2000) | DSI_TIMEOUT_HTX(timeout);
- tegra_dsi_writel(dsi, value, DSI_TIMEOUT_0);
-
- /* 2 ms peripheral timeout for panel */
- timeout = 2 * bclk / 512 * 1000;
- value = DSI_TIMEOUT_PR(timeout) | DSI_TIMEOUT_TA(0x2000);
- tegra_dsi_writel(dsi, value, DSI_TIMEOUT_1);
-
- value = DSI_TALLY_TA(0) | DSI_TALLY_LRX(0) | DSI_TALLY_HTX(0);
- tegra_dsi_writel(dsi, value, DSI_TO_TALLY);
+ tegra_dsi_set_timeout(dsi, bclk, vrefresh);
return 0;
}