On Mon, 08 Feb 2016, "Thulasimani, Sivakumar" <[email protected]>
wrote:
> On 2/5/2016 4:06 PM, Jani Nikula wrote:
>> Hide knowledge about VBT child devices in intel_bios.c.
>>
>> Signed-off-by: Jani Nikula <[email protected]>
>> ---
>> drivers/gpu/drm/i915/i915_drv.h | 2 +-
>> drivers/gpu/drm/i915/intel_bios.c | 33 ++++++++++++++++++++++++++++++++-
>> drivers/gpu/drm/i915/intel_dsi.c | 23 ++++++++++++++---------
>> 3 files changed, 47 insertions(+), 11 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/i915/i915_drv.h
>> b/drivers/gpu/drm/i915/i915_drv.h
>> index 234f33708a31..cd2595c25f8d 100644
>> --- a/drivers/gpu/drm/i915/i915_drv.h
>> +++ b/drivers/gpu/drm/i915/i915_drv.h
>> @@ -1516,7 +1516,6 @@ struct intel_vbt_data {
>>
>> /* MIPI DSI */
>> struct {
>> - u16 port;
>> u16 panel_id;
>> struct mipi_config *config;
>> struct mipi_pps_data *pps;
>> @@ -3400,6 +3399,7 @@ bool intel_bios_is_valid_vbt(const void *buf, size_t
>> size);
>> bool intel_bios_is_tv_present(struct drm_i915_private *dev_priv);
>> bool intel_bios_is_lvds_present(struct drm_i915_private *dev_priv, u8
>> *i2c_pin);
>> bool intel_bios_is_port_edp(struct drm_i915_private *dev_priv, enum port
>> port);
>> +bool intel_bios_is_dsi_present(struct drm_i915_private *dev_priv, enum port
>> *port);
>>
>> /* intel_opregion.c */
>> #ifdef CONFIG_ACPI
>> diff --git a/drivers/gpu/drm/i915/intel_bios.c
>> b/drivers/gpu/drm/i915/intel_bios.c
>> index 1429d8214885..b0cf33234c33 100644
>> --- a/drivers/gpu/drm/i915/intel_bios.c
>> +++ b/drivers/gpu/drm/i915/intel_bios.c
>> @@ -1237,7 +1237,6 @@ parse_device_mapping(struct drm_i915_private *dev_priv,
>> &&p_child->common.device_type & DEVICE_TYPE_MIPI_OUTPUT) {
>> DRM_DEBUG_KMS("Found MIPI as LFP\n");
>> dev_priv->vbt.has_mipi = 1;
>> - dev_priv->vbt.dsi.port = p_child->common.dvo_port;
>> }
>>
>> child_dev_ptr = dev_priv->vbt.child_dev + count;
>> @@ -1552,3 +1551,35 @@ bool intel_bios_is_port_edp(struct drm_i915_private
>> *dev_priv, enum port port)
>>
>> return false;
>> }
>> +
>> +/**
>> + * intel_bios_is_dsi_present - is DSI present in VBT
>> + * @dev_priv: i915 device instance
>> + * @port: port for DSI if present
>> + *
>> + * Return true if DSI is present, and return the port in %port.
>> + */
>> +bool intel_bios_is_dsi_present(struct drm_i915_private *dev_priv,
>> + enum port *port)
>> +{
>> + union child_device_config *p_child;
>> + int i;
>> +
>> + for (i = 0; i < dev_priv->vbt.child_dev_num; i++) {
>> + p_child = dev_priv->vbt.child_dev + i;
>> +
>> + if (!(p_child->common.device_type & DEVICE_TYPE_MIPI_OUTPUT))
>> + continue;
>> +
>> + switch (p_child->common.dvo_port) {
>> + case DVO_PORT_MIPIA:
>> + case DVO_PORT_MIPIB:
>> + case DVO_PORT_MIPIC:
>> + case DVO_PORT_MIPID:
>> + *port = p_child->common.dvo_port - DVO_PORT_MIPIA;
>> + return true;
>> + }
>> + }
> can we add platform check & vbt.has_mipi check ? it will avoid the need
> to loop through the array.
I'm actually going to remove has_mipi altogether as unnecessary
duplication of information. We run the loop very few times anyway. Also,
I don't want to duplicate the information about platforms, that stuff is
in intel_setup_outputs and in the encoder inits. Single point of truth.
> Also since all platforms so far (VLV/CHV/BXT) has only MIPI A & MIPI C
> is B & D needed here ? we can directly fail here for unsupported ports
> rather than in dsi_init as special check.
Agreed.
>> +
>> + return false;
>> +}
>> diff --git a/drivers/gpu/drm/i915/intel_dsi.c
>> b/drivers/gpu/drm/i915/intel_dsi.c
>> index 378f879f4015..5b6ec567e3ce 100644
>> --- a/drivers/gpu/drm/i915/intel_dsi.c
>> +++ b/drivers/gpu/drm/i915/intel_dsi.c
>> @@ -1112,9 +1112,15 @@ void intel_dsi_init(struct drm_device *dev)
>> DRM_DEBUG_KMS("\n");
>>
>> /* There is no detection method for MIPI so rely on VBT */
>> - if (!dev_priv->vbt.has_mipi)
>> + if (!intel_bios_is_dsi_present(dev_priv, &port))
>> return;
>>
>> + if (port != PORT_A && port != PORT_C) {
>> + DRM_DEBUG_KMS("VBT has unsupported DSI port %c\n",
>> + port_name(port));
>> + return;
>> + }
>> +
>> if (IS_VALLEYVIEW(dev) || IS_CHERRYVIEW(dev)) {
>> dev_priv->mipi_mmio_base = VLV_MIPI_BASE;
>> } else {
>> @@ -1153,16 +1159,15 @@ void intel_dsi_init(struct drm_device *dev)
>> intel_connector->unregister = intel_connector_unregister;
>>
>> /* Pipe A maps to MIPI DSI port A, pipe B maps to MIPI DSI port C */
>> - if (dev_priv->vbt.dsi.port == DVO_PORT_MIPIA) {
>> - intel_encoder->crtc_mask = (1 << PIPE_A);
>> - intel_dsi->ports = (1 << PORT_A);
>> - } else if (dev_priv->vbt.dsi.port == DVO_PORT_MIPIC) {
>> - intel_encoder->crtc_mask = (1 << PIPE_B);
>> - intel_dsi->ports = (1 << PORT_C);
>> - }
>> + if (port == PORT_A)
>> + intel_encoder->crtc_mask = 1 << PIPE_A;
>> + else
>> + intel_encoder->crtc_mask = 1 << PIPE_B;
>>
> The above limitation applies only to CHT/VLV.
True, but I'm again reluctant to make the change at this point. It
should be added as part of BXT DSI instead.
BR,
Jani.
>> if (dev_priv->vbt.dsi.config->dual_link)
>> - intel_dsi->ports = ((1 << PORT_A) | (1 << PORT_C));
>> + intel_dsi->ports = (1 << PORT_A) | (1 << PORT_C);
>> + else
>> + intel_dsi->ports = 1 << port;
>>
>> /* Create a DSI host (and a device) for each port. */
>> for_each_dsi_port(port, intel_dsi->ports) {
>
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--
Jani Nikula, Intel Open Source Technology Center
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