int get_dsi_clk(struct intel_dsi *intel_dsi, struct drm_display_mode *mode, \
u32 *dsi_clk)
{
return dsi_clk_from_pclk(intel_dsi, mode, dsi_clk);
/*return dsi_15percent_formula(intel_dsi, mode, dsi_clk);*/
}
/*
* XXX: The muxing and gating is hard coded for now. Need to add support for
* sharing PLLs with two DSI outputs.
*/
int vlv_dsi_pll_compute(struct intel_encoder *encoder,
struct intel_crtc_state *config)
{
struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
int ret;
u32 dsi_clk;
dsi_clk = dsi_clk_from_pclk(intel_dsi->pclk, intel_dsi->pixel_format,
intel_dsi->lane_count);
ret = dsi_calc_mnp(dev_priv, config, dsi_clk);
if (ret) {
DRM_DEBUG_KMS("dsi_calc_mnp failed\n");
return ret;
}
if (intel_dsi->ports & (1 << PORT_A))
config->dsi_pll.ctrl |= DSI_PLL_CLK_GATE_DSI0_DSIPLL;
if (intel_dsi->ports & (1 << PORT_C))
config->dsi_pll.ctrl |= DSI_PLL_CLK_GATE_DSI1_DSIPLL;
config->dsi_pll.ctrl |= DSI_PLL_VCO_EN;
DRM_DEBUG_KMS("dsi pll div %08x, ctrl %08x\n",
config->dsi_pll.div, config->dsi_pll.ctrl);
return 0;
}
int bxt_dsi_pll_compute(struct intel_encoder *encoder,
struct intel_crtc_state *config)
{
struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
u8 dsi_ratio, dsi_ratio_min, dsi_ratio_max;
u32 dsi_clk;
dsi_clk = dsi_clk_from_pclk(intel_dsi->pclk, intel_dsi->pixel_format,
intel_dsi->lane_count);
/*
* From clock diagram, to get PLL ratio divider, divide double of DSI
* link rate (i.e., 2*8x=16x frequency value) by ref clock. Make sure to
* round 'up' the result
*/
dsi_ratio = DIV_ROUND_UP(dsi_clk * 2, BXT_REF_CLOCK_KHZ);
if (IS_BROXTON(dev_priv)) {
dsi_ratio_min = BXT_DSI_PLL_RATIO_MIN;
dsi_ratio_max = BXT_DSI_PLL_RATIO_MAX;
} else {
dsi_ratio_min = GLK_DSI_PLL_RATIO_MIN;
dsi_ratio_max = GLK_DSI_PLL_RATIO_MAX;
}
if (dsi_ratio < dsi_ratio_min || dsi_ratio > dsi_ratio_max) {
DRM_ERROR("Cant get a suitable ratio from DSI PLL ratios\n");
return -ECHRNG;
} else
DRM_DEBUG_KMS("DSI PLL calculation is Done!!\n");
/*
* Program DSI ratio and Select MIPIC and MIPIA PLL output as 8x
* Spec says both have to be programmed, even if one is not getting
* used. Configure MIPI_CLOCK_CTL dividers in modeset
*/
config->dsi_pll.ctrl = dsi_ratio | BXT_DSIA_16X_BY2 | BXT_DSIC_16X_BY2;
/* As per recommendation from hardware team,
* Prog PVD ratio =1 if dsi ratio <= 50
*/
if (IS_BROXTON(dev_priv) && dsi_ratio <= 50)
config->dsi_pll.ctrl |= BXT_DSI_PLL_PVD_RATIO_1;
return 0;
}
static int bxt_compute_dsi_pll(struct intel_encoder *encoder,
struct intel_crtc_state *config)
{
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
u8 dsi_ratio;
u32 dsi_clk;
dsi_clk = dsi_clk_from_pclk(intel_dsi->pclk, intel_dsi->pixel_format,
intel_dsi->lane_count);
/*
* From clock diagram, to get PLL ratio divider, divide double of DSI
* link rate (i.e., 2*8x=16x frequency value) by ref clock. Make sure to
* round 'up' the result
*/
dsi_ratio = DIV_ROUND_UP(dsi_clk * 2, BXT_REF_CLOCK_KHZ);
if (dsi_ratio < BXT_DSI_PLL_RATIO_MIN ||
dsi_ratio > BXT_DSI_PLL_RATIO_MAX) {
DRM_ERROR("Cant get a suitable ratio from DSI PLL ratios\n");
return -ECHRNG;
}
/*
* Program DSI ratio and Select MIPIC and MIPIA PLL output as 8x
* Spec says both have to be programmed, even if one is not getting
* used. Configure MIPI_CLOCK_CTL dividers in modeset
*/
config->dsi_pll.ctrl = dsi_ratio | BXT_DSIA_16X_BY2 | BXT_DSIC_16X_BY2;
/* As per recommendation from hardware team,
* Prog PVD ratio =1 if dsi ratio <= 50
*/
if (dsi_ratio <= 50)
config->dsi_pll.ctrl |= BXT_DSI_PLL_PVD_RATIO_1;
return 0;
}
