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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>
This commit is contained in:
Thierry Reding 2014-11-13 14:50:33 +01:00
parent 337b443d58
commit 3f6b406f7d
1 changed files with 23 additions and 15 deletions
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38
drivers/gpu/drm/tegra/dsi.c
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@ -681,15 +681,35 @@ static int tegra_output_dsi_disable(struct tegra_output *output)
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 @@ static int tegra_output_dsi_setup_clock(struct tegra_output *output,
* 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;
}