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drm/bridge: ti-sn65dsi86: Split the setting of the dp and dsi rates

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These two things were in one function.  Split into two.  This looks
like it's duplicating some code, but don't worry.  This is is just in
preparation for future changes.

This is intended to have zero functional change and will just make
future patches easier to understand.

Signed-off-by: Douglas Anderson <dianders@chromium.org>
Tested-by: Rob Clark <robdclark@gmail.com>
Reviewed-by: Rob Clark <robdclark@gmail.com>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191218143416.v3.1.Icb765d5799e9651e5249c0c27627ba33a9e411cf@changeid
This commit is contained in:
Douglas Anderson 2019-12-18 14:35:22 -08:00 committed by Neil Armstrong
parent f704ff7c3d
commit ca1b885cbe
1 changed files with 26 additions and 13 deletions
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39
drivers/gpu/drm/bridge/ti-sn65dsi86.c
View file

@ -417,19 +417,10 @@ static void ti_sn_bridge_set_refclk_freq(struct ti_sn_bridge *pdata)
REFCLK_FREQ(i));
}
/**
* LUT index corresponds to register value and
* LUT values corresponds to dp data rate supported
* by the bridge in Mbps unit.
*/
static const unsigned int ti_sn_bridge_dp_rate_lut[] = {
0, 1620, 2160, 2430, 2700, 3240, 4320, 5400
};
static void ti_sn_bridge_set_dsi_dp_rate(struct ti_sn_bridge *pdata)
static void ti_sn_bridge_set_dsi_rate(struct ti_sn_bridge *pdata)
{
unsigned int bit_rate_mhz, clk_freq_mhz, dp_rate_mhz;
unsigned int val, i;
unsigned int bit_rate_mhz, clk_freq_mhz;
unsigned int val;
struct drm_display_mode *mode =
&pdata->bridge.encoder->crtc->state->adjusted_mode;
@ -442,6 +433,27 @@ static void ti_sn_bridge_set_dsi_dp_rate(struct ti_sn_bridge *pdata)
val = (MIN_DSI_CLK_FREQ_MHZ / 5) +
(((clk_freq_mhz - MIN_DSI_CLK_FREQ_MHZ) / 5) & 0xFF);
regmap_write(pdata->regmap, SN_DSIA_CLK_FREQ_REG, val);
}
/**
* LUT index corresponds to register value and
* LUT values corresponds to dp data rate supported
* by the bridge in Mbps unit.
*/
static const unsigned int ti_sn_bridge_dp_rate_lut[] = {
0, 1620, 2160, 2430, 2700, 3240, 4320, 5400
};
static void ti_sn_bridge_set_dp_rate(struct ti_sn_bridge *pdata)
{
unsigned int bit_rate_mhz, dp_rate_mhz;
unsigned int i;
struct drm_display_mode *mode =
&pdata->bridge.encoder->crtc->state->adjusted_mode;
/* set DSIA clk frequency */
bit_rate_mhz = (mode->clock / 1000) *
mipi_dsi_pixel_format_to_bpp(pdata->dsi->format);
/* set DP data rate */
dp_rate_mhz = ((bit_rate_mhz / pdata->dsi->lanes) * DP_CLK_FUDGE_NUM) /
@ -510,7 +522,8 @@ static void ti_sn_bridge_enable(struct drm_bridge *bridge)
val);
/* set dsi/dp clk frequency value */
ti_sn_bridge_set_dsi_dp_rate(pdata);
ti_sn_bridge_set_dsi_rate(pdata);
ti_sn_bridge_set_dp_rate(pdata);
/* enable DP PLL */
regmap_write(pdata->regmap, SN_PLL_ENABLE_REG, 1);