On Mon, 23 Dec 2019, Lucas De Marchi <lucas.demarchi@xxxxxxxxx> wrote:
> Identify 3 possible cases in which the index numbers can be different
> from the "port" and add them to the description-based ddi initialization
> table. This can be used in place of additional functions mapping from
> on to the other. Right now we already cover part of this by creating kind of
> virtual phy numbering, but that comes with downsides:
>
> a) there's not really a "phy numbering" in the spec, this is purely a
> software thing; hardware uses whatever they want thinking mapping from
> one to the other arbitrarily is easy in software.
>
> b) currently the mapping occurs on "leaf" functions, making the decision
> based on the platform.
>
> With this new table the approach will be: the port as defined by the
> enum port is purely a driver convention and won't be used anymore to
> define the register offset or register bits. For that we have the other
> 3 indexes, identified as being possibly different from the current usage
> of register bits: ddi, vbt and phy. The phy type is also added here,
> meant to replace the checks for combo vs tc (although the helper
> functions can remain so we may differentiate between, e.g. Dekel and MG
> phys).
I'm not sure how the vbt_idx is supposed to be used (because it's
actually not used anywhere here). I would like to reduce the amount of
VBT info spread around in the driver, so I'd really need to know more.
> While at it, also give names to the ports so they can be easily
> identified.
>
> Signed-off-by: Lucas De Marchi <lucas.demarchi@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/display/intel_display.c | 54 +++++++++----------
> drivers/gpu/drm/i915/display/intel_display.h | 7 +++
> .../drm/i915/display/intel_display_types.h | 5 ++
> 3 files changed, 39 insertions(+), 27 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
> index ad85cf75c815..219f180fa395 100644
> --- a/drivers/gpu/drm/i915/display/intel_display.c
> +++ b/drivers/gpu/drm/i915/display/intel_display.c
> @@ -16277,14 +16277,14 @@ static bool ddi_is_port_present(struct drm_i915_private *i915,
> static const struct intel_output tgl_output = {
> .dsi_init = icl_dsi_init,
> .ddi_ports = {
> - { .port = PORT_A },
> - { .port = PORT_B },
> - { .port = PORT_D },
> - { .port = PORT_E },
> - { .port = PORT_F },
> - { .port = PORT_G },
> - { .port = PORT_H },
> - { .port = PORT_I },
> + { .name = "DDI A", .port = PORT_A, .phy_type = PHY_TYPE_COMBO, .ddi_idx = 0x0, .phy_idx = 0x0, .vbt_idx = 0x0, },
> + { .name = "DDI B", .port = PORT_B, .phy_type = PHY_TYPE_COMBO, .ddi_idx = 0x1, .phy_idx = 0x1, .vbt_idx = 0x1, },
> + { .name = "DDI TC1", .port = PORT_D, .phy_type = PHY_TYPE_TC, .ddi_idx = 0x3, .phy_idx = 0x0, .vbt_idx = 0x2, },
> + { .name = "DDI TC2", .port = PORT_E, .phy_type = PHY_TYPE_TC, .ddi_idx = 0x4, .phy_idx = 0x1, .vbt_idx = 0x3, },
> + { .name = "DDI TC3", .port = PORT_F, .phy_type = PHY_TYPE_TC, .ddi_idx = 0x5, .phy_idx = 0x2, .vbt_idx = 0x4, },
> + { .name = "DDI TC4", .port = PORT_G, .phy_type = PHY_TYPE_TC, .ddi_idx = 0x6, .phy_idx = 0x3, .vbt_idx = 0x5, },
> + { .name = "DDI TC5", .port = PORT_H, .phy_type = PHY_TYPE_TC, .ddi_idx = 0x7, .phy_idx = 0x4, .vbt_idx = 0x6, },
> + { .name = "DDI TC6", .port = PORT_I, .phy_type = PHY_TYPE_TC, .ddi_idx = 0x8, .phy_idx = 0x5, .vbt_idx = 0x7, },
> { .port = PORT_NONE }
Makes you wonder if this sort of info should be linked from the
intel_device_info instead of adding new arrays. Not sure.
BR,
Jani.
> }
> };
> @@ -16293,12 +16293,12 @@ static const struct intel_output icl_output = {
> .dsi_init = icl_dsi_init,
> .is_port_present = icl_is_port_present,
> .ddi_ports = {
> - { .port = PORT_A },
> - { .port = PORT_B },
> - { .port = PORT_C },
> - { .port = PORT_D },
> - { .port = PORT_E },
> - { .port = PORT_F },
> + { .name = "DDI A", .port = PORT_A, .phy_type = PHY_TYPE_COMBO, .ddi_idx = 0x0, .phy_idx = 0x0, .vbt_idx = 0x0, },
> + { .name = "DDI B", .port = PORT_B, .phy_type = PHY_TYPE_COMBO, .ddi_idx = 0x1, .phy_idx = 0x1, .vbt_idx = 0x1, },
> + { .name = "DDI TC1", .port = PORT_C, .phy_type = PHY_TYPE_TC, .ddi_idx = 0x2, .phy_idx = 0x0, .vbt_idx = 0x2, },
> + { .name = "DDI TC2", .port = PORT_D, .phy_type = PHY_TYPE_TC, .ddi_idx = 0x3, .phy_idx = 0x1, .vbt_idx = 0x3, },
> + { .name = "DDI TC3", .port = PORT_E, .phy_type = PHY_TYPE_TC, .ddi_idx = 0x4, .phy_idx = 0x2, .vbt_idx = 0x4, },
> + { .name = "DDI TC4", .port = PORT_F, .phy_type = PHY_TYPE_TC, .ddi_idx = 0x5, .phy_idx = 0x3, .vbt_idx = 0x5, },
> { .port = PORT_NONE }
> }
> };
> @@ -16306,10 +16306,10 @@ static const struct intel_output icl_output = {
> static const struct intel_output ehl_output = {
> .dsi_init = icl_dsi_init,
> .ddi_ports = {
> - { .port = PORT_A },
> - { .port = PORT_B },
> - { .port = PORT_C },
> - { .port = PORT_D },
> + { .name = "DDI A", .port = PORT_A, .phy_type = PHY_TYPE_COMBO, .ddi_idx = 0x0, .phy_idx = 0x0, .vbt_idx = 0x0, },
> + { .name = "DDI B", .port = PORT_B, .phy_type = PHY_TYPE_COMBO, .ddi_idx = 0x1, .phy_idx = 0x1, .vbt_idx = 0x1, },
> + { .name = "DDI C", .port = PORT_C, .phy_type = PHY_TYPE_COMBO, .ddi_idx = 0x2, .phy_idx = 0x2, .vbt_idx = 0x2, },
> + { .name = "DDI D", .port = PORT_D, .phy_type = PHY_TYPE_COMBO, .ddi_idx = 0x3, .phy_idx = 0x0, .vbt_idx = 0x3, },
> { .port = PORT_NONE }
> }
> };
> @@ -16317,9 +16317,9 @@ static const struct intel_output ehl_output = {
> static const struct intel_output gen9lp_output = {
> .dsi_init = vlv_dsi_init,
> .ddi_ports = {
> - { .port = PORT_A },
> - { .port = PORT_B },
> - { .port = PORT_C },
> + { .name = "DDI A", .port = PORT_A, .ddi_idx = 0x0, .phy_idx = 0x0, .vbt_idx = 0x0 },
> + { .name = "DDI B", .port = PORT_B, .ddi_idx = 0x1, .phy_idx = 0x1, .vbt_idx = 0x1 },
> + { .name = "DDI C", .port = PORT_C, .ddi_idx = 0x2, .phy_idx = 0x2, .vbt_idx = 0x2 },
> { .port = PORT_NONE }
> },
> };
> @@ -16327,12 +16327,12 @@ static const struct intel_output gen9lp_output = {
> static const struct intel_output ddi_output = {
> .is_port_present = ddi_is_port_present,
> .ddi_ports = {
> - { .port = PORT_A },
> - { .port = PORT_B },
> - { .port = PORT_C },
> - { .port = PORT_D },
> - { .port = PORT_E },
> - { .port = PORT_F },
> + { .name = "DDI A", .port = PORT_A, .ddi_idx = 0x0, .phy_idx = 0x0, .vbt_idx = 0x0 },
> + { .name = "DDI B", .port = PORT_B, .ddi_idx = 0x1, .phy_idx = 0x1, .vbt_idx = 0x1 },
> + { .name = "DDI C", .port = PORT_C, .ddi_idx = 0x2, .phy_idx = 0x2, .vbt_idx = 0x2 },
> + { .name = "DDI D", .port = PORT_D, .ddi_idx = 0x3, .phy_idx = 0x3, .vbt_idx = 0x3 },
> + { .name = "DDI E", .port = PORT_E, .ddi_idx = 0x4, .phy_idx = 0x4, .vbt_idx = 0x4 },
> + { .name = "DDI F", .port = PORT_F, .ddi_idx = 0x5, .phy_idx = 0x5, .vbt_idx = 0x5 },
> { .port = PORT_NONE }
> }
> };
> diff --git a/drivers/gpu/drm/i915/display/intel_display.h b/drivers/gpu/drm/i915/display/intel_display.h
> index 05d68bd393dc..db19e5eee248 100644
> --- a/drivers/gpu/drm/i915/display/intel_display.h
> +++ b/drivers/gpu/drm/i915/display/intel_display.h
> @@ -303,6 +303,13 @@ enum phy {
> I915_MAX_PHYS
> };
>
> +enum phy_type {
> + PHY_TYPE_NONE = 0,
> +
> + PHY_TYPE_COMBO,
> + PHY_TYPE_TC,
> +};
> +
> #define phy_name(a) ((a) + 'A')
>
> enum phy_fia {
> diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
> index 4d2f4ee35812..23a885895803 100644
> --- a/drivers/gpu/drm/i915/display/intel_display_types.h
> +++ b/drivers/gpu/drm/i915/display/intel_display_types.h
> @@ -1377,7 +1377,12 @@ struct intel_dp_mst_encoder {
> };
>
> struct intel_ddi_port_info {
> + const char *name;
> enum port port;
> + s8 phy_type;
> + u8 ddi_idx;
> + u8 phy_idx;
> + u8 vbt_idx;
> };
>
> static inline enum dpio_channel
--
Jani Nikula, Intel Open Source Graphics Center
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