From 257a7ffcfaf68718c963db6e9978d1f4f647986b Mon Sep 17 00:00:00 2001 From: Daniel Vetter Date: Fri, 26 Jul 2013 08:35:42 +0200 Subject: [PATCH] drm/i915: fix pnv display core clock readout out MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit We need the correct clock to accurately assess whether we need to enable the double wide pipe mode or not. Cc: Chris Wilson Cc: Stéphane Marchesin Cc: Stuart Abercrombie Reviewed-by: Jani Nikula Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/i915_reg.h | 6 ++++++ drivers/gpu/drm/i915/intel_display.c | 29 +++++++++++++++++++++++++++- 2 files changed, 34 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 6caa748fa00f..3aebe5dee4df 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -61,6 +61,12 @@ #define GC_LOW_FREQUENCY_ENABLE (1 << 7) #define GC_DISPLAY_CLOCK_190_200_MHZ (0 << 4) #define GC_DISPLAY_CLOCK_333_MHZ (4 << 4) +#define GC_DISPLAY_CLOCK_267_MHZ_PNV (0 << 4) +#define GC_DISPLAY_CLOCK_333_MHZ_PNV (1 << 4) +#define GC_DISPLAY_CLOCK_444_MHZ_PNV (2 << 4) +#define GC_DISPLAY_CLOCK_200_MHZ_PNV (5 << 4) +#define GC_DISPLAY_CLOCK_133_MHZ_PNV (6 << 4) +#define GC_DISPLAY_CLOCK_167_MHZ_PNV (7 << 4) #define GC_DISPLAY_CLOCK_MASK (7 << 4) #define GM45_GC_RENDER_CLOCK_MASK (0xf << 0) #define GM45_GC_RENDER_CLOCK_266_MHZ (8 << 0) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index b3389d74d695..3e66f05ea342 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -4163,6 +4163,30 @@ static int i9xx_misc_get_display_clock_speed(struct drm_device *dev) return 200000; } +static int pnv_get_display_clock_speed(struct drm_device *dev) +{ + u16 gcfgc = 0; + + pci_read_config_word(dev->pdev, GCFGC, &gcfgc); + + switch (gcfgc & GC_DISPLAY_CLOCK_MASK) { + case GC_DISPLAY_CLOCK_267_MHZ_PNV: + return 267000; + case GC_DISPLAY_CLOCK_333_MHZ_PNV: + return 333000; + case GC_DISPLAY_CLOCK_444_MHZ_PNV: + return 444000; + case GC_DISPLAY_CLOCK_200_MHZ_PNV: + return 200000; + default: + DRM_ERROR("Unknown pnv display core clock 0x%04x\n", gcfgc); + case GC_DISPLAY_CLOCK_133_MHZ_PNV: + return 133000; + case GC_DISPLAY_CLOCK_167_MHZ_PNV: + return 167000; + } +} + static int i915gm_get_display_clock_speed(struct drm_device *dev) { u16 gcfgc = 0; @@ -9605,9 +9629,12 @@ static void intel_init_display(struct drm_device *dev) else if (IS_I915G(dev)) dev_priv->display.get_display_clock_speed = i915_get_display_clock_speed; - else if (IS_I945GM(dev) || IS_845G(dev) || IS_PINEVIEW_M(dev)) + else if (IS_I945GM(dev) || IS_845G(dev)) dev_priv->display.get_display_clock_speed = i9xx_misc_get_display_clock_speed; + else if (IS_PINEVIEW(dev)) + dev_priv->display.get_display_clock_speed = + pnv_get_display_clock_speed; else if (IS_I915GM(dev)) dev_priv->display.get_display_clock_speed = i915gm_get_display_clock_speed;