[Intel-gfx] [PATCH 4/8] drm/i915: Move i9xx_crtc_clock_get() and ironlake_crtc_clock_get() earlier
Jani Nikula
jani.nikula at linux.intel.com
Wed Sep 4 15:22:44 CEST 2013
On Wed, 04 Sep 2013, ville.syrjala at linux.intel.com wrote:
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
>
> Move i9xx_crtc_clock_get() and ironlake_crtc_clock_get() around to avoid
> forward declarations, as we will soon call these directly from
> i9xx_get_pipe_config() and ironlake_get_pipe_config() respectively,
>
> No functional changes.
Reviewed-by: Jani Nikula <jani.nikula at intel.com>
>
> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
> ---
> drivers/gpu/drm/i915/intel_display.c | 262 +++++++++++++++++------------------
> 1 file changed, 131 insertions(+), 131 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index b991acd..74affb1 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -4985,6 +4985,92 @@ static void i9xx_get_pfit_config(struct intel_crtc *crtc,
> I915_READ(LVDS) & LVDS_BORDER_ENABLE;
> }
>
> +/* Returns the clock of the currently programmed mode of the given pipe. */
> +static void i9xx_crtc_clock_get(struct intel_crtc *crtc,
> + struct intel_crtc_config *pipe_config)
> +{
> + struct drm_device *dev = crtc->base.dev;
> + struct drm_i915_private *dev_priv = dev->dev_private;
> + int pipe = pipe_config->cpu_transcoder;
> + u32 dpll = I915_READ(DPLL(pipe));
> + u32 fp;
> + intel_clock_t clock;
> +
> + if ((dpll & DISPLAY_RATE_SELECT_FPA1) == 0)
> + fp = I915_READ(FP0(pipe));
> + else
> + fp = I915_READ(FP1(pipe));
> +
> + clock.m1 = (fp & FP_M1_DIV_MASK) >> FP_M1_DIV_SHIFT;
> + if (IS_PINEVIEW(dev)) {
> + clock.n = ffs((fp & FP_N_PINEVIEW_DIV_MASK) >> FP_N_DIV_SHIFT) - 1;
> + clock.m2 = (fp & FP_M2_PINEVIEW_DIV_MASK) >> FP_M2_DIV_SHIFT;
> + } else {
> + clock.n = (fp & FP_N_DIV_MASK) >> FP_N_DIV_SHIFT;
> + clock.m2 = (fp & FP_M2_DIV_MASK) >> FP_M2_DIV_SHIFT;
> + }
> +
> + if (!IS_GEN2(dev)) {
> + if (IS_PINEVIEW(dev))
> + clock.p1 = ffs((dpll & DPLL_FPA01_P1_POST_DIV_MASK_PINEVIEW) >>
> + DPLL_FPA01_P1_POST_DIV_SHIFT_PINEVIEW);
> + else
> + clock.p1 = ffs((dpll & DPLL_FPA01_P1_POST_DIV_MASK) >>
> + DPLL_FPA01_P1_POST_DIV_SHIFT);
> +
> + switch (dpll & DPLL_MODE_MASK) {
> + case DPLLB_MODE_DAC_SERIAL:
> + clock.p2 = dpll & DPLL_DAC_SERIAL_P2_CLOCK_DIV_5 ?
> + 5 : 10;
> + break;
> + case DPLLB_MODE_LVDS:
> + clock.p2 = dpll & DPLLB_LVDS_P2_CLOCK_DIV_7 ?
> + 7 : 14;
> + break;
> + default:
> + DRM_DEBUG_KMS("Unknown DPLL mode %08x in programmed "
> + "mode\n", (int)(dpll & DPLL_MODE_MASK));
> + pipe_config->adjusted_mode.clock = 0;
> + return;
> + }
> +
> + if (IS_PINEVIEW(dev))
> + pineview_clock(96000, &clock);
> + else
> + i9xx_clock(96000, &clock);
> + } else {
> + bool is_lvds = (pipe == 1) && (I915_READ(LVDS) & LVDS_PORT_EN);
> +
> + if (is_lvds) {
> + clock.p1 = ffs((dpll & DPLL_FPA01_P1_POST_DIV_MASK_I830_LVDS) >>
> + DPLL_FPA01_P1_POST_DIV_SHIFT);
> + clock.p2 = 14;
> +
> + if ((dpll & PLL_REF_INPUT_MASK) ==
> + PLLB_REF_INPUT_SPREADSPECTRUMIN) {
> + /* XXX: might not be 66MHz */
> + i9xx_clock(66000, &clock);
> + } else
> + i9xx_clock(48000, &clock);
> + } else {
> + if (dpll & PLL_P1_DIVIDE_BY_TWO)
> + clock.p1 = 2;
> + else {
> + clock.p1 = ((dpll & DPLL_FPA01_P1_POST_DIV_MASK_I830) >>
> + DPLL_FPA01_P1_POST_DIV_SHIFT) + 2;
> + }
> + if (dpll & PLL_P2_DIVIDE_BY_4)
> + clock.p2 = 4;
> + else
> + clock.p2 = 2;
> +
> + i9xx_clock(48000, &clock);
> + }
> + }
> +
> + pipe_config->adjusted_mode.clock = clock.dot;
> +}
> +
> static bool i9xx_get_pipe_config(struct intel_crtc *crtc,
> struct intel_crtc_config *pipe_config)
> {
> @@ -5901,6 +5987,51 @@ static void ironlake_get_pfit_config(struct intel_crtc *crtc,
> }
> }
>
> +static void ironlake_crtc_clock_get(struct intel_crtc *crtc,
> + struct intel_crtc_config *pipe_config)
> +{
> + struct drm_device *dev = crtc->base.dev;
> + struct drm_i915_private *dev_priv = dev->dev_private;
> + enum transcoder cpu_transcoder = pipe_config->cpu_transcoder;
> + int link_freq;
> + u64 clock;
> + u32 link_m, link_n;
> +
> + /*
> + * The calculation for the data clock is:
> + * pixel_clock = ((m/n)*(link_clock * nr_lanes))/bpp
> + * But we want to avoid losing precison if possible, so:
> + * pixel_clock = ((m * link_clock * nr_lanes)/(n*bpp))
> + *
> + * and the link clock is simpler:
> + * link_clock = (m * link_clock) / n
> + */
> +
> + /*
> + * We need to get the FDI or DP link clock here to derive
> + * the M/N dividers.
> + *
> + * For FDI, we read it from the BIOS or use a fixed 2.7GHz.
> + * For DP, it's either 1.62GHz or 2.7GHz.
> + * We do our calculations in 10*MHz since we don't need much precison.
> + */
> + if (pipe_config->has_pch_encoder)
> + link_freq = intel_fdi_link_freq(dev) * 10000;
> + else
> + link_freq = pipe_config->port_clock;
> +
> + link_m = I915_READ(PIPE_LINK_M1(cpu_transcoder));
> + link_n = I915_READ(PIPE_LINK_N1(cpu_transcoder));
> +
> + if (!link_m || !link_n)
> + return;
> +
> + clock = ((u64)link_m * (u64)link_freq);
> + do_div(clock, link_n);
> +
> + pipe_config->adjusted_mode.clock = clock;
> +}
> +
> static bool ironlake_get_pipe_config(struct intel_crtc *crtc,
> struct intel_crtc_config *pipe_config)
> {
> @@ -7280,137 +7411,6 @@ void intel_release_load_detect_pipe(struct drm_connector *connector,
> mutex_unlock(&crtc->mutex);
> }
>
> -/* Returns the clock of the currently programmed mode of the given pipe. */
> -static void i9xx_crtc_clock_get(struct intel_crtc *crtc,
> - struct intel_crtc_config *pipe_config)
> -{
> - struct drm_device *dev = crtc->base.dev;
> - struct drm_i915_private *dev_priv = dev->dev_private;
> - int pipe = pipe_config->cpu_transcoder;
> - u32 dpll = I915_READ(DPLL(pipe));
> - u32 fp;
> - intel_clock_t clock;
> -
> - if ((dpll & DISPLAY_RATE_SELECT_FPA1) == 0)
> - fp = I915_READ(FP0(pipe));
> - else
> - fp = I915_READ(FP1(pipe));
> -
> - clock.m1 = (fp & FP_M1_DIV_MASK) >> FP_M1_DIV_SHIFT;
> - if (IS_PINEVIEW(dev)) {
> - clock.n = ffs((fp & FP_N_PINEVIEW_DIV_MASK) >> FP_N_DIV_SHIFT) - 1;
> - clock.m2 = (fp & FP_M2_PINEVIEW_DIV_MASK) >> FP_M2_DIV_SHIFT;
> - } else {
> - clock.n = (fp & FP_N_DIV_MASK) >> FP_N_DIV_SHIFT;
> - clock.m2 = (fp & FP_M2_DIV_MASK) >> FP_M2_DIV_SHIFT;
> - }
> -
> - if (!IS_GEN2(dev)) {
> - if (IS_PINEVIEW(dev))
> - clock.p1 = ffs((dpll & DPLL_FPA01_P1_POST_DIV_MASK_PINEVIEW) >>
> - DPLL_FPA01_P1_POST_DIV_SHIFT_PINEVIEW);
> - else
> - clock.p1 = ffs((dpll & DPLL_FPA01_P1_POST_DIV_MASK) >>
> - DPLL_FPA01_P1_POST_DIV_SHIFT);
> -
> - switch (dpll & DPLL_MODE_MASK) {
> - case DPLLB_MODE_DAC_SERIAL:
> - clock.p2 = dpll & DPLL_DAC_SERIAL_P2_CLOCK_DIV_5 ?
> - 5 : 10;
> - break;
> - case DPLLB_MODE_LVDS:
> - clock.p2 = dpll & DPLLB_LVDS_P2_CLOCK_DIV_7 ?
> - 7 : 14;
> - break;
> - default:
> - DRM_DEBUG_KMS("Unknown DPLL mode %08x in programmed "
> - "mode\n", (int)(dpll & DPLL_MODE_MASK));
> - pipe_config->adjusted_mode.clock = 0;
> - return;
> - }
> -
> - if (IS_PINEVIEW(dev))
> - pineview_clock(96000, &clock);
> - else
> - i9xx_clock(96000, &clock);
> - } else {
> - bool is_lvds = (pipe == 1) && (I915_READ(LVDS) & LVDS_PORT_EN);
> -
> - if (is_lvds) {
> - clock.p1 = ffs((dpll & DPLL_FPA01_P1_POST_DIV_MASK_I830_LVDS) >>
> - DPLL_FPA01_P1_POST_DIV_SHIFT);
> - clock.p2 = 14;
> -
> - if ((dpll & PLL_REF_INPUT_MASK) ==
> - PLLB_REF_INPUT_SPREADSPECTRUMIN) {
> - /* XXX: might not be 66MHz */
> - i9xx_clock(66000, &clock);
> - } else
> - i9xx_clock(48000, &clock);
> - } else {
> - if (dpll & PLL_P1_DIVIDE_BY_TWO)
> - clock.p1 = 2;
> - else {
> - clock.p1 = ((dpll & DPLL_FPA01_P1_POST_DIV_MASK_I830) >>
> - DPLL_FPA01_P1_POST_DIV_SHIFT) + 2;
> - }
> - if (dpll & PLL_P2_DIVIDE_BY_4)
> - clock.p2 = 4;
> - else
> - clock.p2 = 2;
> -
> - i9xx_clock(48000, &clock);
> - }
> - }
> -
> - pipe_config->adjusted_mode.clock = clock.dot;
> -}
> -
> -static void ironlake_crtc_clock_get(struct intel_crtc *crtc,
> - struct intel_crtc_config *pipe_config)
> -{
> - struct drm_device *dev = crtc->base.dev;
> - struct drm_i915_private *dev_priv = dev->dev_private;
> - enum transcoder cpu_transcoder = pipe_config->cpu_transcoder;
> - int link_freq;
> - u64 clock;
> - u32 link_m, link_n;
> -
> - /*
> - * The calculation for the data clock is:
> - * pixel_clock = ((m/n)*(link_clock * nr_lanes))/bpp
> - * But we want to avoid losing precison if possible, so:
> - * pixel_clock = ((m * link_clock * nr_lanes)/(n*bpp))
> - *
> - * and the link clock is simpler:
> - * link_clock = (m * link_clock) / n
> - */
> -
> - /*
> - * We need to get the FDI or DP link clock here to derive
> - * the M/N dividers.
> - *
> - * For FDI, we read it from the BIOS or use a fixed 2.7GHz.
> - * For DP, it's either 1.62GHz or 2.7GHz.
> - * We do our calculations in 10*MHz since we don't need much precison.
> - */
> - if (pipe_config->has_pch_encoder)
> - link_freq = intel_fdi_link_freq(dev) * 10000;
> - else
> - link_freq = pipe_config->port_clock;
> -
> - link_m = I915_READ(PIPE_LINK_M1(cpu_transcoder));
> - link_n = I915_READ(PIPE_LINK_N1(cpu_transcoder));
> -
> - if (!link_m || !link_n)
> - return;
> -
> - clock = ((u64)link_m * (u64)link_freq);
> - do_div(clock, link_n);
> -
> - pipe_config->adjusted_mode.clock = clock;
> -}
> -
> /** Returns the currently programmed mode of the given pipe. */
> struct drm_display_mode *intel_crtc_mode_get(struct drm_device *dev,
> struct drm_crtc *crtc)
> --
> 1.8.1.5
>
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--
Jani Nikula, Intel Open Source Technology Center
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