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drm/i915: Add encoder->is_clock_enabled() 

Support reading out the current state of the DDI clock.

Not sure we really want this. Seems a bit excessive just to
restore the debug print to icl_sanitize_encoder_pll_mapping()?
But maybe there's more use for it?

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210224144214.24803-6-ville.syrjala@linux.intel.com
Reviewed-by: Mika Kahola <mika.kahola@intel.com>
This commit is contained in:
Ville Syrjälä 2021-02-24 16:42:13 +02:00
parent 351221ffc5
commit 0fbd869427
5 changed files with 146 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
drivers/gpu/drm/i915/display/icl_dsi.c
View File

@ -655,6 +655,24 @@ static void gen11_dsi_ungate_clocks(struct intel_encoder *encoder)
mutex_unlock(&dev_priv->dpll.lock);
}
static bool gen11_dsi_is_clock_enabled(struct intel_encoder *encoder)
{
struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder);
bool clock_enabled = false;
enum phy phy;
u32 tmp;
tmp = intel_de_read(dev_priv, ICL_DPCLKA_CFGCR0);
for_each_dsi_phy(phy, intel_dsi->phys) {
if (!(tmp & ICL_DPCLKA_CFGCR0_DDI_CLK_OFF(phy)))
clock_enabled = true;
}
return clock_enabled;
}
static void gen11_dsi_map_pll(struct intel_encoder *encoder,
const struct intel_crtc_state *crtc_state)
{
@ -1939,6 +1957,7 @@ void icl_dsi_init(struct drm_i915_private *dev_priv)
encoder->power_domain = POWER_DOMAIN_PORT_DSI;
encoder->get_power_domains = gen11_dsi_get_power_domains;
encoder->disable_clock = gen11_dsi_gate_clocks;
encoder->is_clock_enabled = gen11_dsi_is_clock_enabled;
/* register DSI connector with DRM subsystem */
drm_connector_init(dev, connector, &gen11_dsi_connector_funcs,

1
drivers/gpu/drm/i915/display/intel_crt.c
View File

@ -1078,6 +1078,7 @@ void intel_crt_init(struct drm_i915_private *dev_priv)
crt->base.post_disable = hsw_post_disable_crt;
crt->base.enable_clock = hsw_ddi_enable_clock;
crt->base.disable_clock = hsw_ddi_disable_clock;
crt->base.is_clock_enabled = hsw_ddi_is_clock_enabled;
} else {
if (HAS_PCH_SPLIT(dev_priv)) {
crt->base.compute_config = pch_crt_compute_config;

123
drivers/gpu/drm/i915/display/intel_ddi.c
View File

@ -1588,6 +1588,12 @@ static void _cnl_ddi_disable_clock(struct drm_i915_private *i915, i915_reg_t reg
mutex_unlock(&i915->dpll.lock);
}
static bool _cnl_ddi_is_clock_enabled(struct drm_i915_private *i915, i915_reg_t reg,
u32 clk_off)
{
return !(intel_de_read(i915, reg) & clk_off);
}
static struct intel_shared_dpll *
_cnl_ddi_get_pll(struct drm_i915_private *i915, i915_reg_t reg,
u32 clk_sel_mask, u32 clk_sel_shift)
@ -1624,6 +1630,15 @@ static void adls_ddi_disable_clock(struct intel_encoder *encoder)
ICL_DPCLKA_CFGCR0_DDI_CLK_OFF(phy));
}
static bool adls_ddi_is_clock_enabled(struct intel_encoder *encoder)
{
struct drm_i915_private *i915 = to_i915(encoder->base.dev);
enum phy phy = intel_port_to_phy(i915, encoder->port);
return _cnl_ddi_is_clock_enabled(i915, ADLS_DPCLKA_CFGCR(phy),
ICL_DPCLKA_CFGCR0_DDI_CLK_OFF(phy));
}
static struct intel_shared_dpll *adls_ddi_get_pll(struct intel_encoder *encoder)
{
struct drm_i915_private *i915 = to_i915(encoder->base.dev);
@ -1659,6 +1674,15 @@ static void rkl_ddi_disable_clock(struct intel_encoder *encoder)
RKL_DPCLKA_CFGCR0_DDI_CLK_OFF(phy));
}
static bool rkl_ddi_is_clock_enabled(struct intel_encoder *encoder)
{
struct drm_i915_private *i915 = to_i915(encoder->base.dev);
enum phy phy = intel_port_to_phy(i915, encoder->port);
return _cnl_ddi_is_clock_enabled(i915, ICL_DPCLKA_CFGCR0,
RKL_DPCLKA_CFGCR0_DDI_CLK_OFF(phy));
}
static struct intel_shared_dpll *rkl_ddi_get_pll(struct intel_encoder *encoder)
{
struct drm_i915_private *i915 = to_i915(encoder->base.dev);
@ -1703,6 +1727,15 @@ static void dg1_ddi_disable_clock(struct intel_encoder *encoder)
DG1_DPCLKA_CFGCR0_DDI_CLK_OFF(phy));
}
static bool dg1_ddi_is_clock_enabled(struct intel_encoder *encoder)
{
struct drm_i915_private *i915 = to_i915(encoder->base.dev);
enum phy phy = intel_port_to_phy(i915, encoder->port);
return _cnl_ddi_is_clock_enabled(i915, DG1_DPCLKA_CFGCR0(phy),
DG1_DPCLKA_CFGCR0_DDI_CLK_OFF(phy));
}
static struct intel_shared_dpll *dg1_ddi_get_pll(struct intel_encoder *encoder)
{
struct drm_i915_private *i915 = to_i915(encoder->base.dev);
@ -1738,6 +1771,15 @@ static void icl_ddi_combo_disable_clock(struct intel_encoder *encoder)
ICL_DPCLKA_CFGCR0_DDI_CLK_OFF(phy));
}
static bool icl_ddi_combo_is_clock_enabled(struct intel_encoder *encoder)
{
struct drm_i915_private *i915 = to_i915(encoder->base.dev);
enum phy phy = intel_port_to_phy(i915, encoder->port);
return _cnl_ddi_is_clock_enabled(i915, ICL_DPCLKA_CFGCR0,
ICL_DPCLKA_CFGCR0_DDI_CLK_OFF(phy));
}
struct intel_shared_dpll *icl_ddi_combo_get_pll(struct intel_encoder *encoder)
{
struct drm_i915_private *i915 = to_i915(encoder->base.dev);
@ -1777,6 +1819,20 @@ static void jsl_ddi_tc_disable_clock(struct intel_encoder *encoder)
intel_de_write(i915, DDI_CLK_SEL(port), DDI_CLK_SEL_NONE);
}
static bool jsl_ddi_tc_is_clock_enabled(struct intel_encoder *encoder)
{
struct drm_i915_private *i915 = to_i915(encoder->base.dev);
enum port port = encoder->port;
u32 tmp;
tmp = intel_de_read(i915, DDI_CLK_SEL(port));
if ((tmp & DDI_CLK_SEL_MASK) == DDI_CLK_SEL_NONE)
return false;
return icl_ddi_combo_is_clock_enabled(encoder);
}
static void icl_ddi_tc_enable_clock(struct intel_encoder *encoder,
const struct intel_crtc_state *crtc_state)
{
@ -1815,6 +1871,23 @@ static void icl_ddi_tc_disable_clock(struct intel_encoder *encoder)
intel_de_write(i915, DDI_CLK_SEL(port), DDI_CLK_SEL_NONE);
}
static bool icl_ddi_tc_is_clock_enabled(struct intel_encoder *encoder)
{
struct drm_i915_private *i915 = to_i915(encoder->base.dev);
enum tc_port tc_port = intel_port_to_tc(i915, encoder->port);
enum port port = encoder->port;
u32 tmp;
tmp = intel_de_read(i915, DDI_CLK_SEL(port));
if ((tmp & DDI_CLK_SEL_MASK) == DDI_CLK_SEL_NONE)
return false;
tmp = intel_de_read(i915, ICL_DPCLKA_CFGCR0);
return !(tmp & ICL_DPCLKA_CFGCR0_TC_CLK_OFF(tc_port));
}
static struct intel_shared_dpll *icl_ddi_tc_get_pll(struct intel_encoder *encoder)
{
struct drm_i915_private *i915 = to_i915(encoder->base.dev);
@ -1870,6 +1943,15 @@ static void cnl_ddi_disable_clock(struct intel_encoder *encoder)
DPCLKA_CFGCR0_DDI_CLK_OFF(port));
}
static bool cnl_ddi_is_clock_enabled(struct intel_encoder *encoder)
{
struct drm_i915_private *i915 = to_i915(encoder->base.dev);
enum port port = encoder->port;
return _cnl_ddi_is_clock_enabled(i915, DPCLKA_CFGCR0,
DPCLKA_CFGCR0_DDI_CLK_OFF(port));
}
static struct intel_shared_dpll *cnl_ddi_get_pll(struct intel_encoder *encoder)
{
struct drm_i915_private *i915 = to_i915(encoder->base.dev);
@ -1937,6 +2019,18 @@ static void skl_ddi_disable_clock(struct intel_encoder *encoder)
mutex_unlock(&i915->dpll.lock);
}
static bool skl_ddi_is_clock_enabled(struct intel_encoder *encoder)
{
struct drm_i915_private *i915 = to_i915(encoder->base.dev);
enum port port = encoder->port;
/*
* FIXME Not sure if the override affects both
* the PLL selection and the CLK_OFF bit.
*/
return !(intel_de_read(i915, DPLL_CTRL2) & DPLL_CTRL2_DDI_CLK_OFF(port));
}
static struct intel_shared_dpll *skl_ddi_get_pll(struct intel_encoder *encoder)
{
struct drm_i915_private *i915 = to_i915(encoder->base.dev);
@ -1980,6 +2074,14 @@ void hsw_ddi_disable_clock(struct intel_encoder *encoder)
intel_de_write(i915, PORT_CLK_SEL(port), PORT_CLK_SEL_NONE);
}
bool hsw_ddi_is_clock_enabled(struct intel_encoder *encoder)
{
struct drm_i915_private *i915 = to_i915(encoder->base.dev);
enum port port = encoder->port;
return intel_de_read(i915, PORT_CLK_SEL(port)) != PORT_CLK_SEL_NONE;
}
static struct intel_shared_dpll *hsw_ddi_get_pll(struct intel_encoder *encoder)
{
struct drm_i915_private *i915 = to_i915(encoder->base.dev);
@ -2083,8 +2185,15 @@ void icl_sanitize_encoder_pll_mapping(struct intel_encoder *encoder)
ddi_clk_needed = false;
}
if (!ddi_clk_needed && encoder->disable_clock)
encoder->disable_clock(encoder);
if (ddi_clk_needed || !encoder->disable_clock ||
!encoder->is_clock_enabled(encoder))
return;
drm_notice(&i915->drm,
"[ENCODER:%d:%s] is disabled/in DSI mode with an ungated DDI clock, gate it\n",
encoder->base.base.id, encoder->base.name);
encoder->disable_clock(encoder);
}
static void
@ -4407,38 +4516,46 @@ void intel_ddi_init(struct drm_i915_private *dev_priv, enum port port)
if (IS_ALDERLAKE_S(dev_priv)) {
encoder->enable_clock = adls_ddi_enable_clock;
encoder->disable_clock = adls_ddi_disable_clock;
encoder->is_clock_enabled = adls_ddi_is_clock_enabled;
encoder->get_config = adls_ddi_get_config;
} else if (IS_ROCKETLAKE(dev_priv)) {
encoder->enable_clock = rkl_ddi_enable_clock;
encoder->disable_clock = rkl_ddi_disable_clock;
encoder->is_clock_enabled = rkl_ddi_is_clock_enabled;
encoder->get_config = rkl_ddi_get_config;
} else if (IS_DG1(dev_priv)) {
encoder->enable_clock = dg1_ddi_enable_clock;
encoder->disable_clock = dg1_ddi_disable_clock;
encoder->is_clock_enabled = dg1_ddi_is_clock_enabled;
encoder->get_config = dg1_ddi_get_config;
} else if (IS_JSL_EHL(dev_priv)) {
if (intel_ddi_is_tc(dev_priv, port)) {
encoder->enable_clock = jsl_ddi_tc_enable_clock;
encoder->disable_clock = jsl_ddi_tc_disable_clock;
encoder->is_clock_enabled = jsl_ddi_tc_is_clock_enabled;
encoder->get_config = icl_ddi_combo_get_config;
} else {
encoder->enable_clock = icl_ddi_combo_enable_clock;
encoder->disable_clock = icl_ddi_combo_disable_clock;
encoder->is_clock_enabled = icl_ddi_combo_is_clock_enabled;
encoder->get_config = icl_ddi_combo_get_config;
}
} else if (INTEL_GEN(dev_priv) >= 11) {
if (intel_ddi_is_tc(dev_priv, port)) {
encoder->enable_clock = icl_ddi_tc_enable_clock;
encoder->disable_clock = icl_ddi_tc_disable_clock;
encoder->is_clock_enabled = icl_ddi_tc_is_clock_enabled;
encoder->get_config = icl_ddi_tc_get_config;
} else {
encoder->enable_clock = icl_ddi_combo_enable_clock;
encoder->disable_clock = icl_ddi_combo_disable_clock;
encoder->is_clock_enabled = icl_ddi_combo_is_clock_enabled;
encoder->get_config = icl_ddi_combo_get_config;
}
} else if (IS_CANNONLAKE(dev_priv)) {
encoder->enable_clock = cnl_ddi_enable_clock;
encoder->disable_clock = cnl_ddi_disable_clock;
encoder->is_clock_enabled = cnl_ddi_is_clock_enabled;
encoder->get_config = cnl_ddi_get_config;
} else if (IS_GEN9_LP(dev_priv)) {
/* BXT/GLK have fixed PLL->port mapping */
@ -4446,10 +4563,12 @@ void intel_ddi_init(struct drm_i915_private *dev_priv, enum port port)
} else if (IS_GEN9_BC(dev_priv)) {
encoder->enable_clock = skl_ddi_enable_clock;
encoder->disable_clock = skl_ddi_disable_clock;
encoder->is_clock_enabled = skl_ddi_is_clock_enabled;
encoder->get_config = skl_ddi_get_config;
} else if (IS_BROADWELL(dev_priv) || IS_HASWELL(dev_priv)) {
encoder->enable_clock = hsw_ddi_enable_clock;
encoder->disable_clock = hsw_ddi_disable_clock;
encoder->is_clock_enabled = hsw_ddi_is_clock_enabled;
encoder->get_config = hsw_ddi_get_config;
}

1
drivers/gpu/drm/i915/display/intel_ddi.h
View File

@ -36,6 +36,7 @@ void intel_ddi_get_clock(struct intel_encoder *encoder,
void hsw_ddi_enable_clock(struct intel_encoder *encoder,
const struct intel_crtc_state *crtc_state);
void hsw_ddi_disable_clock(struct intel_encoder *encoder);
bool hsw_ddi_is_clock_enabled(struct intel_encoder *encoder);
void hsw_ddi_get_config(struct intel_encoder *encoder,
struct intel_crtc_state *crtc_state);
struct intel_shared_dpll *icl_ddi_combo_get_pll(struct intel_encoder *encoder);

4
drivers/gpu/drm/i915/display/intel_display_types.h
View File

@ -226,6 +226,10 @@ struct intel_encoder {
void (*enable_clock)(struct intel_encoder *encoder,
const struct intel_crtc_state *crtc_state);
void (*disable_clock)(struct intel_encoder *encoder);
/*
* Returns whether the port clock is enabled or not.
*/
bool (*is_clock_enabled)(struct intel_encoder *encoder);
enum hpd_pin hpd_pin;
enum intel_display_power_domain power_domain;
/* for communication with audio component; protected by av_mutex */