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drm/i915: don't chnage the original mode in dp_mode_fixup 

We should only frob adjusted_mode. This is in preparation of
a massive patch by Laurent Pinchart to make the mode argument
const.

After the previous two prep patches the only thing left is to clean up
things a bit. I've opted to pass in an adjust_mode param to
dp_adjust_dithering because that way we can be sure to avoid
duplicating this logic between mode_valid and mode_fixup - which was
the cause behind a dp link bw calculation bug in the past.

Also mark the mode argument of pch_panel_fitting const.

v2: Split up the mode->clock => adjusted_mode->clock change,
as suggested by Chris Wilson.

Reported-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Daniel Vetter 2012-06-04 18:39:21 +02:00
parent 71244653a8
commit cb1793ce92
3 changed files with 8 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/gpu/drm/i915/intel_dp.c
View File

@ -234,7 +234,7 @@ intel_dp_max_data_rate(int max_link_clock, int max_lanes)
static bool
intel_dp_adjust_dithering(struct intel_dp *intel_dp,
struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
bool adjust_mode)
{
int max_link_clock = intel_dp_link_clock(intel_dp_max_link_bw(intel_dp));
int max_lanes = intel_dp_max_lane_count(intel_dp);
@ -248,8 +248,8 @@ intel_dp_adjust_dithering(struct intel_dp *intel_dp,
if (mode_rate > max_rate)
return false;
if (adjusted_mode)
adjusted_mode->private_flags
if (adjust_mode)
mode->private_flags
|= INTEL_MODE_DP_FORCE_6BPC;
return true;
@ -272,7 +272,7 @@ intel_dp_mode_valid(struct drm_connector *connector,
return MODE_PANEL;
}
if (!intel_dp_adjust_dithering(intel_dp, mode, NULL))
if (!intel_dp_adjust_dithering(intel_dp, mode, false))
return MODE_CLOCK_HIGH;
if (mode->clock < 10000)
@ -712,14 +712,14 @@ intel_dp_mode_fixup(struct drm_encoder *encoder, struct drm_display_mode *mode,
mode, adjusted_mode);
}
if (mode->flags & DRM_MODE_FLAG_DBLCLK)
if (adjusted_mode->flags & DRM_MODE_FLAG_DBLCLK)
return false;
DRM_DEBUG_KMS("DP link computation with max lane count %i "
"max bw %02x pixel clock %iKHz\n",
max_lane_count, bws[max_clock], adjusted_mode->clock);
if (!intel_dp_adjust_dithering(intel_dp, adjusted_mode, adjusted_mode))
if (!intel_dp_adjust_dithering(intel_dp, adjusted_mode, true))
return false;
bpp = adjusted_mode->private_flags & INTEL_MODE_DP_FORCE_6BPC ? 18 : 24;

2
drivers/gpu/drm/i915/intel_drv.h
View File

@ -373,7 +373,7 @@ extern void intel_fixed_panel_mode(struct drm_display_mode *fixed_mode,
struct drm_display_mode *adjusted_mode);
extern void intel_pch_panel_fitting(struct drm_device *dev,
int fitting_mode,
struct drm_display_mode *mode,
const struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode);
extern u32 intel_panel_get_max_backlight(struct drm_device *dev);
extern u32 intel_panel_get_backlight(struct drm_device *dev);

2
drivers/gpu/drm/i915/intel_panel.c
View File

@ -56,7 +56,7 @@ intel_fixed_panel_mode(struct drm_display_mode *fixed_mode,
void
intel_pch_panel_fitting(struct drm_device *dev,
int fitting_mode,
struct drm_display_mode *mode,
const struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode)
{
struct drm_i915_private *dev_priv = dev->dev_private;