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drm/i915/icl: Program TRANS_DDI_FUNC_CTL registers 

This patch select input PIPE for DSI, data lanes width,
enable port sync mode and wait for DSI link to become ready.

v2 by Jani:
 - Use MISSING_CASE with fallthrough instead of DRM_ERROR
 - minor stylistic changes

Signed-off-by: Madhav Chauhan <madhav.chauhan@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/080320dc9a9e321dbe73567c6a7aa1dcff0f21c2.1539613303.git.jani.nikula@intel.com
This commit is contained in:
Madhav Chauhan 2018-10-15 17:28:01 +03:00 committed by Jani Nikula
parent 49edbd4978
commit 70f4f502c4
1 changed files with 60 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

64
drivers/gpu/drm/i915/icl_dsi.c
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@ -340,10 +340,14 @@ static void gen11_dsi_setup_dphy_timings(struct intel_encoder *encoder)
} }
} }
static void gen11_dsi_configure_transcoder(struct intel_encoder *encoder) static void
gen11_dsi_configure_transcoder(struct intel_encoder *encoder,
const struct intel_crtc_state *pipe_config)
{ {
struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base); struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
struct intel_crtc *intel_crtc = to_intel_crtc(pipe_config->base.crtc);
enum pipe pipe = intel_crtc->pipe;
u32 tmp; u32 tmp;
enum port port; enum port port;
enum transcoder dsi_trans; enum transcoder dsi_trans;
@ -420,9 +424,61 @@ static void gen11_dsi_configure_transcoder(struct intel_encoder *encoder)
I915_WRITE(DSI_TRANS_FUNC_CONF(dsi_trans), tmp); I915_WRITE(DSI_TRANS_FUNC_CONF(dsi_trans), tmp);
} }
/* enable port sync mode if dual link */
if (intel_dsi->dual_link) {
for_each_dsi_port(port, intel_dsi->ports) {
dsi_trans = dsi_port_to_transcoder(port);
tmp = I915_READ(TRANS_DDI_FUNC_CTL2(dsi_trans));
tmp |= PORT_SYNC_MODE_ENABLE;
I915_WRITE(TRANS_DDI_FUNC_CTL2(dsi_trans), tmp);
}
//TODO: configure DSS_CTL1
}
for_each_dsi_port(port, intel_dsi->ports) {
dsi_trans = dsi_port_to_transcoder(port);
/* select data lane width */
tmp = I915_READ(TRANS_DDI_FUNC_CTL(dsi_trans));
tmp &= ~DDI_PORT_WIDTH_MASK;
tmp |= DDI_PORT_WIDTH(intel_dsi->lane_count);
/* select input pipe */
tmp &= ~TRANS_DDI_EDP_INPUT_MASK;
switch (pipe) {
default:
MISSING_CASE(pipe);
/* fallthrough */
case PIPE_A:
tmp |= TRANS_DDI_EDP_INPUT_A_ON;
break;
case PIPE_B:
tmp |= TRANS_DDI_EDP_INPUT_B_ONOFF;
break;
case PIPE_C:
tmp |= TRANS_DDI_EDP_INPUT_C_ONOFF;
break;
}
/* enable DDI buffer */
tmp |= TRANS_DDI_FUNC_ENABLE;
I915_WRITE(TRANS_DDI_FUNC_CTL(dsi_trans), tmp);
}
/* wait for link ready */
for_each_dsi_port(port, intel_dsi->ports) {
dsi_trans = dsi_port_to_transcoder(port);
if (wait_for_us((I915_READ(DSI_TRANS_FUNC_CONF(dsi_trans)) &
LINK_READY), 2500))
DRM_ERROR("DSI link not ready\n");
}
} }
static void gen11_dsi_enable_port_and_phy(struct intel_encoder *encoder) static void
gen11_dsi_enable_port_and_phy(struct intel_encoder *encoder,
const struct intel_crtc_state *pipe_config)
{ {
/* step 4a: power up all lanes of the DDI used by DSI */ /* step 4a: power up all lanes of the DDI used by DSI */
gen11_dsi_power_up_lanes(encoder); gen11_dsi_power_up_lanes(encoder);
@ -440,7 +496,7 @@ static void gen11_dsi_enable_port_and_phy(struct intel_encoder *encoder)
gen11_dsi_setup_dphy_timings(encoder); gen11_dsi_setup_dphy_timings(encoder);
/* Step (4h, 4i, 4j, 4k): Configure transcoder */ /* Step (4h, 4i, 4j, 4k): Configure transcoder */
gen11_dsi_configure_transcoder(encoder); gen11_dsi_configure_transcoder(encoder, pipe_config);
} }
static void __attribute__((unused)) static void __attribute__((unused))
@ -455,5 +511,5 @@ gen11_dsi_pre_enable(struct intel_encoder *encoder,
gen11_dsi_program_esc_clk_div(encoder); gen11_dsi_program_esc_clk_div(encoder);
/* step4: enable DSI port and DPHY */ /* step4: enable DSI port and DPHY */
gen11_dsi_enable_port_and_phy(encoder); gen11_dsi_enable_port_and_phy(encoder, pipe_config);
} }