static void rcar_lvds_enable(struct drm_bridge *bridge)
{
struct rcar_lvds *lvds = bridge_to_rcar_lvds(bridge);
const struct drm_display_mode *mode = &lvds->display_mode;
/*
* FIXME: We should really retrieve the CRTC through the state, but how
* do we get a state pointer?
*/
struct drm_crtc *crtc = lvds->bridge.encoder->crtc;
u32 lvdpllcr;
u32 lvdhcr;
u32 lvdcr0;
int ret;
WARN_ON(lvds->enabled);
ret = clk_prepare_enable(lvds->clock);
if (ret < 0)
return;
/*
* Hardcode the channels and control signals routing for now.
*
* HSYNC -> CTRL0
* VSYNC -> CTRL1
* DISP -> CTRL2
* 0 -> CTRL3
*/
rcar_lvds_write(lvds, LVDCTRCR, LVDCTRCR_CTR3SEL_ZERO |
LVDCTRCR_CTR2SEL_DISP | LVDCTRCR_CTR1SEL_VSYNC |
LVDCTRCR_CTR0SEL_HSYNC);
if (lvds->info->quirks & RCAR_LVDS_QUIRK_LANES)
lvdhcr = LVDCHCR_CHSEL_CH(0, 0) | LVDCHCR_CHSEL_CH(1, 3)
| LVDCHCR_CHSEL_CH(2, 2) | LVDCHCR_CHSEL_CH(3, 1);
else
lvdhcr = LVDCHCR_CHSEL_CH(0, 0) | LVDCHCR_CHSEL_CH(1, 1)
| LVDCHCR_CHSEL_CH(2, 2) | LVDCHCR_CHSEL_CH(3, 3);
rcar_lvds_write(lvds, LVDCHCR, lvdhcr);
/* PLL clock configuration. */
if (lvds->info->quirks & RCAR_LVDS_QUIRK_GEN2_PLLCR)
lvdpllcr = rcar_lvds_lvdpllcr_gen2(mode->clock);
else
lvdpllcr = rcar_lvds_lvdpllcr_gen3(mode->clock);
rcar_lvds_write(lvds, LVDPLLCR, lvdpllcr);
/* Set the LVDS mode and select the input. */
lvdcr0 = lvds->mode << LVDCR0_LVMD_SHIFT;
if (drm_crtc_index(crtc) == 2)
lvdcr0 |= LVDCR0_DUSEL;
rcar_lvds_write(lvds, LVDCR0, lvdcr0);
/* Turn all the channels on. */
rcar_lvds_write(lvds, LVDCR1,
LVDCR1_CHSTBY(3) | LVDCR1_CHSTBY(2) |
LVDCR1_CHSTBY(1) | LVDCR1_CHSTBY(0) | LVDCR1_CLKSTBY);
if (lvds->info->gen < 3) {
/* Enable LVDS operation and turn the bias circuitry on. */
lvdcr0 |= LVDCR0_BEN | LVDCR0_LVEN;
rcar_lvds_write(lvds, LVDCR0, lvdcr0);
}
/* Turn the PLL on. */
lvdcr0 |= LVDCR0_PLLON;
rcar_lvds_write(lvds, LVDCR0, lvdcr0);
if (lvds->info->gen > 2) {
/* Set LVDS normal mode. */
lvdcr0 |= LVDCR0_PWD;
rcar_lvds_write(lvds, LVDCR0, lvdcr0);
}
if (lvds->info->quirks & RCAR_LVDS_QUIRK_GEN3_LVEN) {
/* Turn on the LVDS PHY. */
lvdcr0 |= LVDCR0_LVEN;
rcar_lvds_write(lvds, LVDCR0, lvdcr0);
}
/* Wait for the startup delay. */
usleep_range(100, 150);
/* Turn the output on. */
lvdcr0 |= LVDCR0_LVRES;
rcar_lvds_write(lvds, LVDCR0, lvdcr0);
if (lvds->panel) {
drm_panel_prepare(lvds->panel);
drm_panel_enable(lvds->panel);
}
lvds->enabled = true;
}
static int rcar_du_lvdsenc_start(struct rcar_du_lvdsenc *lvds,
struct rcar_du_crtc *rcrtc)
{
const struct drm_display_mode *mode = &rcrtc->crtc.mode;
unsigned int freq = mode->clock;
u32 lvdcr0;
u32 lvdhcr;
u32 pllcr;
int ret;
if (lvds->enabled)
return 0;
ret = clk_prepare_enable(lvds->clock);
if (ret < 0)
return ret;
/* PLL clock configuration */
if (freq <= 38000)
pllcr = LVDPLLCR_CEEN | LVDPLLCR_COSEL | LVDPLLCR_PLLDLYCNT_38M;
else if (freq <= 60000)
pllcr = LVDPLLCR_CEEN | LVDPLLCR_COSEL | LVDPLLCR_PLLDLYCNT_60M;
else if (freq <= 121000)
pllcr = LVDPLLCR_CEEN | LVDPLLCR_COSEL | LVDPLLCR_PLLDLYCNT_121M;
else
pllcr = LVDPLLCR_PLLDLYCNT_150M;
rcar_lvds_write(lvds, LVDPLLCR, pllcr);
/* Hardcode the channels and control signals routing for now.
*
* HSYNC -> CTRL0
* VSYNC -> CTRL1
* DISP -> CTRL2
* 0 -> CTRL3
*/
rcar_lvds_write(lvds, LVDCTRCR, LVDCTRCR_CTR3SEL_ZERO |
LVDCTRCR_CTR2SEL_DISP | LVDCTRCR_CTR1SEL_VSYNC |
LVDCTRCR_CTR0SEL_HSYNC);
if (rcar_du_needs(lvds->dev, RCAR_DU_QUIRK_LVDS_LANES))
lvdhcr = LVDCHCR_CHSEL_CH(0, 0) | LVDCHCR_CHSEL_CH(1, 3)
| LVDCHCR_CHSEL_CH(2, 2) | LVDCHCR_CHSEL_CH(3, 1);
else
lvdhcr = LVDCHCR_CHSEL_CH(0, 0) | LVDCHCR_CHSEL_CH(1, 1)
| LVDCHCR_CHSEL_CH(2, 2) | LVDCHCR_CHSEL_CH(3, 3);
rcar_lvds_write(lvds, LVDCHCR, lvdhcr);
/* Select the input, hardcode mode 0, enable LVDS operation and turn
* bias circuitry on.
*/
lvdcr0 = LVDCR0_BEN | LVDCR0_LVEN;
if (rcrtc->index == 2)
lvdcr0 |= LVDCR0_DUSEL;
rcar_lvds_write(lvds, LVDCR0, lvdcr0);
/* Turn all the channels on. */
rcar_lvds_write(lvds, LVDCR1, LVDCR1_CHSTBY(3) | LVDCR1_CHSTBY(2) |
LVDCR1_CHSTBY(1) | LVDCR1_CHSTBY(0) | LVDCR1_CLKSTBY);
/* Turn the PLL on, wait for the startup delay, and turn the output
* on.
*/
lvdcr0 |= LVDCR0_PLLEN;
rcar_lvds_write(lvds, LVDCR0, lvdcr0);
usleep_range(100, 150);
lvdcr0 |= LVDCR0_LVRES;
rcar_lvds_write(lvds, LVDCR0, lvdcr0);
lvds->enabled = true;
return 0;
}