On Mon, Nov 02, 2020 at 08:59:32AM -0800, Aditya Swarup wrote:
On 10/26/20 9:35 PM, Lucas De Marchi wrote:On Mon, Oct 26, 2020 at 09:32:26PM -0700, Lucas De Marchi wrote:DG1 uses 2 registers for the ddi clock mapping, with PHY A and B using DPCLKA_CFGCR0 and PHY C and D using DPCLKA1_CFGCR0. Hide this behind a single macro that chooses the correct register according to the phy being accessed, use the correct bitfields for each pll/phy and implement separate functions for DG1 since it doesn't share much with ICL/TGL anymore. The previous values were correct for PHY A and B since they were using the same register as before and the bitfields were matching. v2: Add comment and try to simplify DG1_DPCLKA* macros by reusing previous ones Cc: José Roberto de Souza <jose.souza@xxxxxxxxx> Cc: Clinton Taylor <Clinton.A.Taylor@xxxxxxxxx> Cc: Matt Roper <matthew.d.roper@xxxxxxxxx> Signed-off-by: Lucas De Marchi <lucas.demarchi@xxxxxxxxx>Matt, you had given you R-b but since I changed the macros considerably, please take a look if it still stands. thanks Lucas De Marchi--- drivers/gpu/drm/i915/display/intel_ddi.c | 92 +++++++++++++++++++- drivers/gpu/drm/i915/display/intel_display.c | 25 +++++- drivers/gpu/drm/i915/i915_reg.h | 23 +++++ 3 files changed, 136 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c index 63380b166c25..f6343a950b3a 100644 --- a/drivers/gpu/drm/i915/display/intel_ddi.c +++ b/drivers/gpu/drm/i915/display/intel_ddi.c @@ -2970,6 +2970,38 @@ static u32 icl_dpclka_cfgcr0_clk_off(struct drm_i915_private *dev_priv, return 0; } +static void dg1_map_plls_to_ports(struct intel_encoder *encoder, + const struct intel_crtc_state *crtc_state) +{ + struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); + struct intel_shared_dpll *pll = crtc_state->shared_dpll; + enum phy phy = intel_port_to_phy(dev_priv, encoder->port); + u32 val; + + /* + * If we fail this, something went very wrong: first 2 PLLs should be + * used by first 2 phys and last 2 PLLs by last phys + */ + if (WARN_ON((pll->info->id < DPLL_ID_DG1_DPLL2 && phy >= PHY_C) || + (pll->info->id >= DPLL_ID_DG1_DPLL2 && phy < PHY_C))) + return; + + mutex_lock(&dev_priv->dpll.lock); + + val = intel_de_read(dev_priv, DG1_DPCLKA_CFGCR0(phy)); + WARN_ON((val & DG1_DPCLKA_CFGCR0_DDI_CLK_OFF(phy)) == 0); + + val &= ~DG1_DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(phy); + val |= DG1_DPCLKA_CFGCR0_DDI_CLK_SEL(pll->info->id, phy); + intel_de_write(dev_priv, DG1_DPCLKA_CFGCR0(phy), val); + intel_de_posting_read(dev_priv, DG1_DPCLKA_CFGCR0(phy)); + + val &= ~DG1_DPCLKA_CFGCR0_DDI_CLK_OFF(phy); + intel_de_write(dev_priv, DG1_DPCLKA_CFGCR0(phy), val); + + mutex_unlock(&dev_priv->dpll.lock); +} + static void icl_map_plls_to_ports(struct intel_encoder *encoder, const struct intel_crtc_state *crtc_state) { @@ -3017,6 +3049,19 @@ static void icl_map_plls_to_ports(struct intel_encoder *encoder, mutex_unlock(&dev_priv->dpll.lock); } +static void dg1_unmap_plls_to_ports(struct intel_encoder *encoder) +{ + struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); + enum phy phy = intel_port_to_phy(dev_priv, encoder->port); + + mutex_lock(&dev_priv->dpll.lock); + + intel_de_rmw(dev_priv, DG1_DPCLKA_CFGCR0(phy), 0, + DG1_DPCLKA_CFGCR0_DDI_CLK_OFF(phy)); + + mutex_unlock(&dev_priv->dpll.lock); +} + static void icl_unmap_plls_to_ports(struct intel_encoder *encoder) { struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); @@ -3032,6 +3077,40 @@ static void icl_unmap_plls_to_ports(struct intel_encoder *encoder) mutex_unlock(&dev_priv->dpll.lock); } +static void dg1_sanitize_port_clk_off(struct drm_i915_private *dev_priv, + u32 port_mask, bool ddi_clk_needed) +{ + enum port port; + u32 val; + + for_each_port_masked(port, port_mask) { + enum phy phy = intel_port_to_phy(dev_priv, port); + bool ddi_clk_off; + + val = intel_de_read(dev_priv, DG1_DPCLKA_CFGCR0(phy)); + ddi_clk_off = val & DG1_DPCLKA_CFGCR0_DDI_CLK_OFF(phy); + + if (ddi_clk_needed == !ddi_clk_off) + continue; + + /* + * Punt on the case now where clock is gated, but it would + * be needed by the port. Something else is really broken then. + */ + if (ddi_clk_needed) { + WARN(1, "ddi_clk_needed=%u ddi_clk_off=%u phy=%u\n", + ddi_clk_needed, ddi_clk_off, phy); + continue; + } + + DRM_NOTE("PHY %c is disabled/in DSI mode with an ungated DDI clock, gate it\n", + phy_name(phy)); + + val |= DG1_DPCLKA_CFGCR0_DDI_CLK_OFF(phy); + intel_de_write(dev_priv, DG1_DPCLKA_CFGCR0(phy), val); + } +} + static void icl_sanitize_port_clk_off(struct drm_i915_private *dev_priv, u32 port_mask, bool ddi_clk_needed) { @@ -3114,7 +3193,10 @@ void icl_sanitize_encoder_pll_mapping(struct intel_encoder *encoder) ddi_clk_needed = false; } - icl_sanitize_port_clk_off(dev_priv, port_mask, ddi_clk_needed); + if (IS_DG1(dev_priv)) + dg1_sanitize_port_clk_off(dev_priv, port_mask, ddi_clk_needed); + else + icl_sanitize_port_clk_off(dev_priv, port_mask, ddi_clk_needed); } static void intel_ddi_clk_select(struct intel_encoder *encoder, @@ -3666,7 +3748,9 @@ static void intel_ddi_pre_enable(struct intel_atomic_state *state, drm_WARN_ON(&dev_priv->drm, crtc_state->has_pch_encoder); - if (INTEL_GEN(dev_priv) >= 11) + if (IS_DG1(dev_priv)) + dg1_map_plls_to_ports(encoder, crtc_state); + else if (INTEL_GEN(dev_priv) >= 11) icl_map_plls_to_ports(encoder, crtc_state); intel_set_cpu_fifo_underrun_reporting(dev_priv, pipe, true); @@ -3848,7 +3932,9 @@ static void intel_ddi_post_disable(struct intel_atomic_state *state, intel_ddi_post_disable_dp(state, encoder, old_crtc_state, old_conn_state); - if (INTEL_GEN(dev_priv) >= 11) + if (IS_DG1(dev_priv)) + dg1_unmap_plls_to_ports(encoder); + else if (INTEL_GEN(dev_priv) >= 11) icl_unmap_plls_to_ports(encoder); if (intel_crtc_has_dp_encoder(old_crtc_state) || is_tc_port) diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c index f41b6f8b5618..97c14d187a83 100644 --- a/drivers/gpu/drm/i915/display/intel_display.c +++ b/drivers/gpu/drm/i915/display/intel_display.c @@ -11003,6 +11003,27 @@ static int hsw_crtc_compute_clock(struct intel_crtc *crtc, return 0; } +static void dg1_get_ddi_pll(struct drm_i915_private *dev_priv, enum port port, + struct intel_crtc_state *pipe_config) +{ + enum icl_port_dpll_id port_dpll_id = ICL_PORT_DPLL_DEFAULT; + enum phy phy = intel_port_to_phy(dev_priv, port); + enum intel_dpll_id id; + u32 val; + + val = intel_de_read(dev_priv, DG1_DPCLKA_CFGCR0(phy)) + & DG1_DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(phy);val is masked with clk sel mask before being passed to PLL ID macro. Check comment on PLL ID macro definition below.+ id = DG1_DPCLKA_CFGCR0_DDI_CLK_SEL_TO_PLL_ID(val, phy); + + if (WARN_ON(id > DPLL_ID_DG1_DPLL3)) + return; + + pipe_config->icl_port_dplls[port_dpll_id].pll = + intel_get_shared_dpll_by_id(dev_priv, id); + + icl_set_active_port_dpll(pipe_config, port_dpll_id); +} + static void cnl_get_ddi_pll(struct drm_i915_private *dev_priv, enum port port, struct intel_crtc_state *pipe_config) { @@ -11311,7 +11332,9 @@ static void hsw_get_ddi_port_state(struct intel_crtc *crtc, port = TRANS_DDI_FUNC_CTL_VAL_TO_PORT(tmp); } - if (INTEL_GEN(dev_priv) >= 11) + if (IS_DG1(dev_priv)) + dg1_get_ddi_pll(dev_priv, port, pipe_config); + else if (INTEL_GEN(dev_priv) >= 11) icl_get_ddi_pll(dev_priv, port, pipe_config); else if (IS_CANNONLAKE(dev_priv)) cnl_get_ddi_pll(dev_priv, port, pipe_config); diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 8b021f77cb1f..99c749787541 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -230,12 +230,14 @@ static inline bool i915_mmio_reg_valid(i915_reg_t reg) #define _TRANS(tran, a, b) _PICK_EVEN(tran, a, b) #define _PORT(port, a, b) _PICK_EVEN(port, a, b) #define _PLL(pll, a, b) _PICK_EVEN(pll, a, b) +#define _PHY(phy, a, b) _PICK_EVEN(phy, a, b) #define _MMIO_PIPE(pipe, a, b) _MMIO(_PIPE(pipe, a, b)) #define _MMIO_PLANE(plane, a, b) _MMIO(_PLANE(plane, a, b)) #define _MMIO_TRANS(tran, a, b) _MMIO(_TRANS(tran, a, b)) #define _MMIO_PORT(port, a, b) _MMIO(_PORT(port, a, b)) #define _MMIO_PLL(pll, a, b) _MMIO(_PLL(pll, a, b)) +#define _MMIO_PHY(phy, a, b) _MMIO(_PHY(phy, a, b)) #define _PHY3(phy, ...) _PICK(phy, __VA_ARGS__) @@ -10324,6 +10326,7 @@ enum skl_power_gate { #define DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(port) (3 << DPCLKA_CFGCR0_DDI_CLK_SEL_SHIFT(port)) #define DPCLKA_CFGCR0_DDI_CLK_SEL(pll, port) ((pll) << DPCLKA_CFGCR0_DDI_CLK_SEL_SHIFT(port)) +/* ICL Clocks */ #define ICL_DPCLKA_CFGCR0 _MMIO(0x164280) #define ICL_DPCLKA_CFGCR0_DDI_CLK_OFF(phy) (1 << _PICK(phy, 10, 11, 24)) #define RKL_DPCLKA_CFGCR0_DDI_CLK_OFF(phy) REG_BIT((phy) + 10) @@ -10339,6 +10342,26 @@ enum skl_power_gate { #define RKL_DPCLKA_CFGCR0_DDI_CLK_SEL(pll, phy) \ ((pll) << RKL_DPCLKA_CFGCR0_DDI_CLK_SEL_SHIFT(phy)) +/* + * DG1 Clocks + * First registers controls the first A and B, while the second register + * controls the phy C and D. The bits on these registers are the + * same, but refer to different phys + */ +#define _DG1_DPCLKA_CFGCR0 0x164280 +#define _DG1_DPCLKA1_CFGCR0 0x16C280 +#define _DG1_DPCLKA_PHY_IDX(phy) ((phy) % 2) +#define _DG1_DPCLKA_PLL_IDX(pll) ((pll) % 2) +#define DG1_DPCLKA_CFGCR0(phy) _MMIO_PHY((phy) / 2, \ + _DG1_DPCLKA_CFGCR0, \ + _DG1_DPCLKA1_CFGCR0) +#define DG1_DPCLKA_CFGCR0_DDI_CLK_OFF(phy) REG_BIT(_DG1_DPCLKA_PHY_IDX(phy) + 10) +#define DG1_DPCLKA_CFGCR0_DDI_CLK_SEL(pll, phy) (_DG1_DPCLKA_PLL_IDX(pll) << (_DG1_DPCLKA_PHY_IDX(phy) * 2)) +#define DG1_DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(phy) DG1_DPCLKA_CFGCR0_DDI_CLK_SEL(0x3, phy)Even though it is implicitly understood that the value being passed is a mask rather than a pll to the CLK_SEL macro and the first argument to CLK_SEL macro is a pll and not pll mask, a one line comment explaining that would be helpful. But up to you if you feel the usage is self explanatory.
this mask is actually wrong. it's always doing `1 << bla(phy)` instead of 3 << bla(phy). I guess I was to eager to reuse the previously defined macros. I will replace with: #define DG1_DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(phy) (0x3 << (_DG1_DPCLKA_PHY_IDX(phy) * 2))
+#define DG1_DPCLKA_CFGCR0_DDI_CLK_SEL_TO_PLL_ID(val, phy) \ + ((((val) & DG1_DPCLKA_CFGCR0_DDI_CLK_SEL_MASK(phy)) >> (_DG1_DPCLKA_PHY_IDX(phy) * 2)) + \& with DG1_DPCLKA_CFGCR0_DDI_CLK_SEL_MASK() is not required in the macro as it is already masked before the value is passed to PLL ID macro.
ok, I will remove it from here
+ ((phy) >= PHY_C ? DPLL_ID_DG1_DPLL2 : DPLL_ID_DG1_DPLL0))Would prefer this PHY_C,D <-> DPLL2,3 mapping check to be defined as a separate macro for better readability/clarity.
not sure... I will change the code and see how it looks. It seems we are just spreading the horrible macros instead of having all of the horrible macro magic in a single place :( thanks Lucas De Marchi
Aditya+ /* CNL PLL */ #define DPLL0_ENABLE 0x46010 #define DPLL1_ENABLE 0x46014 -- 2.29.0 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx_______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx_______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
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