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drm/bridge: tc358767: Introduce tc_set_syspllparam()

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Move common code converting clock rate to an appropriate constant and
configuring SYS_PLLPARAM register into a separate routine and convert
the rest of the code to use it. No functional change intended.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Andrzej Hajda <a.hajda@samsung.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Andrzej Hajda <a.hajda@samsung.com>
Cc: Laurent Pinchart <Laurent.pinchart@ideasonboard.com>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Andrey Gusakov <andrey.gusakov@cogentembedded.com>
Cc: Philipp Zabel <p.zabel@pengutronix.de>
Cc: Chris Healy <cphealy@gmail.com>
Cc: Cory Tusar <cory.tusar@zii.aero>
Cc: Lucas Stach <l.stach@pengutronix.de>
Cc: dri-devel@lists.freedesktop.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190619052716.16831-11-andrew.smirnov@gmail.com
This commit is contained in:
Andrey Smirnov 2019-06-18 22:27:11 -07:00 • committed by Andrzej Hajda
parent 12dfe7c4d9
commit c49f60dfbf
1 changed files with 16 additions and 30 deletions
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46
drivers/gpu/drm/bridge/tc358767.c
View file

@ -556,35 +556,40 @@ static int tc_stream_clock_calc(struct tc_data *tc)
return regmap_write(tc->regmap, DP0_VIDMNGEN1, 32768); return regmap_write(tc->regmap, DP0_VIDMNGEN1, 32768);
} }
static int tc_aux_link_setup(struct tc_data *tc) static int tc_set_syspllparam(struct tc_data *tc)
{ {
unsigned long rate; unsigned long rate;
u32 dp0_auxcfg1; u32 pllparam = SYSCLK_SEL_LSCLK | LSCLK_DIV_2;
u32 value;
int ret;
rate = clk_get_rate(tc->refclk); rate = clk_get_rate(tc->refclk);
switch (rate) { switch (rate) {
case 38400000: case 38400000:
value = REF_FREQ_38M4; pllparam |= REF_FREQ_38M4;
break; break;
case 26000000: case 26000000:
value = REF_FREQ_26M; pllparam |= REF_FREQ_26M;
break; break;
case 19200000: case 19200000:
value = REF_FREQ_19M2; pllparam |= REF_FREQ_19M2;
break; break;
case 13000000: case 13000000:
value = REF_FREQ_13M; pllparam |= REF_FREQ_13M;
break; break;
default: default:
dev_err(tc->dev, "Invalid refclk rate: %lu Hz\n", rate); dev_err(tc->dev, "Invalid refclk rate: %lu Hz\n", rate);
return -EINVAL; return -EINVAL;
} }
return regmap_write(tc->regmap, SYS_PLLPARAM, pllparam);
}
static int tc_aux_link_setup(struct tc_data *tc)
{
int ret;
u32 dp0_auxcfg1;
/* Setup DP-PHY / PLL */ /* Setup DP-PHY / PLL */
value |= SYSCLK_SEL_LSCLK | LSCLK_DIV_2; ret = tc_set_syspllparam(tc);
ret = regmap_write(tc->regmap, SYS_PLLPARAM, value);
if (ret) if (ret)
goto err; goto err;
@ -843,7 +848,6 @@ static int tc_main_link_enable(struct tc_data *tc)
{ {
struct drm_dp_aux *aux = &tc->aux; struct drm_dp_aux *aux = &tc->aux;
struct device *dev = tc->dev; struct device *dev = tc->dev;
unsigned int rate;
u32 dp_phy_ctrl; u32 dp_phy_ctrl;
u32 value; u32 value;
int ret; int ret;
@ -871,25 +875,7 @@ static int tc_main_link_enable(struct tc_data *tc)
if (ret) if (ret)
return ret; return ret;
rate = clk_get_rate(tc->refclk); ret = tc_set_syspllparam(tc);
switch (rate) {
case 38400000:
value = REF_FREQ_38M4;
break;
case 26000000:
value = REF_FREQ_26M;
break;
case 19200000:
value = REF_FREQ_19M2;
break;
case 13000000:
value = REF_FREQ_13M;
break;
default:
return -EINVAL;
}
value |= SYSCLK_SEL_LSCLK | LSCLK_DIV_2;
ret = regmap_write(tc->regmap, SYS_PLLPARAM, value);
if (ret) if (ret)
return ret; return ret;