Re: [PATCH 2/3] drm/i915: Add 180 degree primary plane rotation support

Damien Lespiau
2014-06-24T10:29:32Z

On Mon, Jun 23, 2014 at 11:06:00AM +0530, sonika.jindal@intel.com wrote:
> From: Sonika Jindal <sonika.jindal@intel.com>
>
> Primary planes support 180 degree rotation. Expose the feature
> through rotation drm property.
>
> v2: Calculating linear/tiled offsets based on pipe source width and
> height. Added 180 degree rotation support in ironlake_update_plane.
>
> v3: Checking if CRTC is active before issueing update_plane. Added
> wait for vblank to make sure we dont overtake page flips. Disabling
> FBC since it does not work with rotated planes.
>
> v4: Updated rotation checks for pending flips, fbc disable. Creating
> rotation property only for Gen4 onwards. Property resetting as part
> of lastclose.
>
> v5: Resetting property in i915_driver_lastclose properly for planes
> and crtcs. Fixed linear offset calculation that was off by 1 w.r.t
> width in i9xx_update_plane and ironlake_update_plane. Removed tab
> based indentation and unnecessary braces in intel_crtc_set_property
> and intel_update_fbc. FBC and flip related checks should be done only
> for valid crtcs.
>
> v6: Minor nits in FBC disable checks for comments in intel_crtc_set_property
> and positioning the disable code in intel_update_fbc.
>
> v7: In case rotation property on inactive crtc is updated, we return
> successfully printing debug log as crtc is inactive and only property change
> is preserved.
>
> v8: update_plane is changed to update_primary_plane, crtc->fb is changed to
> crtc->primary->fb and return value of update_primary_plane is ignored.
>
> v9: added rotation property to primary plane instead of crtc. Removing reset
> of rotation property from lastclose. rotation_property is moved to drm_plane,so
> drm layer will take care of resetting.
>
> Testcase: igt/kms_rotation_crc
>
> Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
> Cc: Jani Nikula <jani.nikula@linux.intel.com>
> Cc: dri-devel@lists.freedesktop.org
> Cc: vijay.a.purushothaman@intel.com
> Signed-off-by: Uma Shankar <uma.shankar@intel.com>
> Signed-off-by: Sagar Kamble <sagar.a.kamble@intel.com>
> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
> ---
> drivers/gpu/drm/i915/i915_dma.c | 5 --
> drivers/gpu/drm/i915/i915_reg.h | 1 +
> drivers/gpu/drm/i915/intel_display.c | 94 ++++++++++++++++++++++++++++++++--
> drivers/gpu/drm/i915/intel_pm.c | 8 +++
> 4 files changed, 98 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
> index 5e583a1..4b6b911 100644
> --- a/drivers/gpu/drm/i915/i915_dma.c
> +++ b/drivers/gpu/drm/i915/i915_dma.c
> @@ -1938,14 +1938,9 @@ int i915_driver_open(struct drm_device *dev, struct drm_file *file)
> */
> void i915_driver_lastclose(struct drm_device *dev)
> {
> - struct drm_i915_private *dev_priv = dev->dev_private;
> -
> /* On gen6+ we refuse to init without kms enabled, but then the drm core
> * goes right around and calls lastclose. Check for this and don't clean
> * up anything. */
> - if (!dev_priv)
> - return;
> -
> if (drm_core_check_feature(dev, DRIVER_MODESET)) {
> intel_fbdev_restore_mode(dev);
> vga_switcheroo_process_delayed_switch();
> diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
> index c70c804..c600d3b 100644
> --- a/drivers/gpu/drm/i915/i915_reg.h
> +++ b/drivers/gpu/drm/i915/i915_reg.h
> @@ -4087,6 +4087,7 @@ enum punit_power_well {
> #define DISPPLANE_NO_LINE_DOUBLE 0
> #define DISPPLANE_STEREO_POLARITY_FIRST 0
> #define DISPPLANE_STEREO_POLARITY_SECOND (1<<18)
> +#define DISPPLANE_ROTATE_180 (1<<15)
> #define DISPPLANE_TRICKLE_FEED_DISABLE (1<<14) /* Ironlake */
> #define DISPPLANE_TILED (1<<10)
> #define _DSPAADDR 0x70184
> diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
> index 5e8e711..85bd3b8 100644
> --- a/drivers/gpu/drm/i915/intel_display.c
> +++ b/drivers/gpu/drm/i915/intel_display.c
> @@ -2414,7 +2414,9 @@ static void i9xx_update_primary_plane(struct drm_crtc *crtc,
> unsigned long linear_offset;
> u32 dspcntr;
> u32 reg;
> + int pixel_size;
>
> + pixel_size = drm_format_plane_cpp(fb->pixel_format, 0);
> intel_fb = to_intel_framebuffer(fb);
> obj = intel_fb->obj;
>
> @@ -2422,6 +2424,8 @@ static void i9xx_update_primary_plane(struct drm_crtc *crtc,
> dspcntr = I915_READ(reg);
> /* Mask out pixel format bits in case we change it */
> dspcntr &= ~DISPPLANE_PIXFORMAT_MASK;
> + dspcntr &= ~DISPPLANE_ROTATE_180;
> +
> switch (fb->pixel_format) {
> case DRM_FORMAT_C8:
> dspcntr |= DISPPLANE_8BPP;
> @@ -2463,8 +2467,6 @@ static void i9xx_update_primary_plane(struct drm_crtc *crtc,
> if (IS_G4X(dev))
> dspcntr |= DISPPLANE_TRICKLE_FEED_DISABLE;
>
> - I915_WRITE(reg, dspcntr);
> -
> linear_offset = y * fb->pitches[0] + x * (fb->bits_per_pixel / 8);
>
> if (INTEL_INFO(dev)->gen >= 4) {
> @@ -2477,6 +2479,17 @@ static void i9xx_update_primary_plane(struct drm_crtc *crtc,
> intel_crtc->dspaddr_offset = linear_offset;
> }
>
> + if (to_intel_plane(crtc->primary)->rotation == BIT(DRM_ROTATE_180)) {
> + dspcntr |= DISPPLANE_ROTATE_180;
> +
> + x += (intel_crtc->config.pipe_src_w - 1);
> + y += (intel_crtc->config.pipe_src_h - 1);
> + linear_offset += (intel_crtc->config.pipe_src_h - 1) * fb->pitches[0] +
> + (intel_crtc->config.pipe_src_w - 1) * pixel_size;
> + }
> +
> + I915_WRITE(reg, dspcntr);
> +
> DRM_DEBUG_KMS("Writing base %08lX %08lX %d %d %d\n",
> i915_gem_obj_ggtt_offset(obj), linear_offset, x, y,
> fb->pitches[0]);
> @@ -2487,7 +2500,8 @@ static void i9xx_update_primary_plane(struct drm_crtc *crtc,
> I915_WRITE(DSPTILEOFF(plane), (y << 16) | x);
> I915_WRITE(DSPLINOFF(plane), linear_offset);
> } else
> - I915_WRITE(DSPADDR(plane), i915_gem_obj_ggtt_offset(obj) + linear_offset);
> + I915_WRITE(DSPADDR(plane), i915_gem_obj_ggtt_offset(obj) +
> + linear_offset);
> POSTING_READ(reg);
> }
>
> @@ -2504,7 +2518,9 @@ static void ironlake_update_primary_plane(struct drm_crtc *crtc,
> unsigned long linear_offset;
> u32 dspcntr;
> u32 reg;
> + int pixel_size;
>
> + pixel_size = drm_format_plane_cpp(fb->pixel_format, 0);
> intel_fb = to_intel_framebuffer(fb);
> obj = intel_fb->obj;
>
> @@ -2512,6 +2528,8 @@ static void ironlake_update_primary_plane(struct drm_crtc *crtc,
> dspcntr = I915_READ(reg);
> /* Mask out pixel format bits in case we change it */
> dspcntr &= ~DISPPLANE_PIXFORMAT_MASK;
> + dspcntr &= ~DISPPLANE_ROTATE_180;
> +
> switch (fb->pixel_format) {
> case DRM_FORMAT_C8:
> dspcntr |= DISPPLANE_8BPP;
> @@ -2549,8 +2567,6 @@ static void ironlake_update_primary_plane(struct drm_crtc *crtc,
> else
> dspcntr |= DISPPLANE_TRICKLE_FEED_DISABLE;
>
> - I915_WRITE(reg, dspcntr);
> -
> linear_offset = y * fb->pitches[0] + x * (fb->bits_per_pixel / 8);
> intel_crtc->dspaddr_offset =
> intel_gen4_compute_page_offset(&x, &y, obj->tiling_mode,
> @@ -2558,6 +2574,20 @@ static void ironlake_update_primary_plane(struct drm_crtc *crtc,
> fb->pitches[0]);
> linear_offset -= intel_crtc->dspaddr_offset;
>
> + if (to_intel_plane(crtc->primary)->rotation == BIT(DRM_ROTATE_180)) {
> + dspcntr |= DISPPLANE_ROTATE_180;
> +
> + if (!IS_HASWELL(dev) && !IS_BROADWELL(dev)) {
> + x += (intel_crtc->config.pipe_src_w - 1);
> + y += (intel_crtc->config.pipe_src_h - 1);
> + linear_offset += (intel_crtc->config.pipe_src_h - 1) *
> + fb->pitches[0] + (intel_crtc->config.pipe_src_w - 1) *
> + pixel_size;
> + }
> + }
> +
> + I915_WRITE(reg, dspcntr);
> +
> DRM_DEBUG_KMS("Writing base %08lX %08lX %d %d %d\n",
> i915_gem_obj_ggtt_offset(obj), linear_offset, x, y,
> fb->pitches[0]);
> @@ -11324,10 +11354,50 @@ static void intel_plane_destroy(struct drm_plane *plane)
> kfree(intel_plane);
> }
>
> +static int intel_primary_plane_set_property(struct drm_plane *plane,
> + struct drm_property *prop,
> + uint64_t val)
> +{
> + struct drm_device *dev = plane->dev;
> + struct drm_i915_private *dev_priv = dev->dev_private;
> + struct intel_plane *intel_plane = to_intel_plane(plane);
> + struct intel_crtc *intel_crtc = to_intel_crtc(plane->crtc);
> + struct drm_crtc *crtc = &intel_crtc->base;
> + uint64_t old_val;
> +
> + if (prop == plane->rotation_property) {
> + /* exactly one rotation angle please */
> + if (hweight32(val & 0xf) != 1)
> + return -EINVAL;
> +
> + old_val = intel_plane->rotation;
> + intel_plane->rotation = val;
> +
> + if (intel_crtc->active && intel_crtc->primary_enabled) {
> + intel_crtc_wait_for_pending_flips(crtc);
> +
> + /* FBC does not work on some platforms for rotated planes */
> + if (dev_priv->fbc.plane == intel_crtc->plane &&
> + INTEL_INFO(dev)->gen <= 4 && !IS_G4X(dev) &&
> + intel_plane->rotation != BIT(DRM_ROTATE_0))
> + intel_disable_fbc(dev);
> + dev_priv->display.update_primary_plane(crtc, crtc->primary->fb,
> + 0, 0);
> +
> + } else {
> + DRM_DEBUG_KMS("[CRTC:%d] is not active. Only rotation property is updated\n",
> + crtc->base.id);
> + }
> + }
> +
> + return 0;
> +}
> +
> static const struct drm_plane_funcs intel_primary_plane_funcs = {
> .update_plane = intel_primary_plane_setplane,
> .disable_plane = intel_primary_plane_disable,
> .destroy = intel_plane_destroy,
> + .set_property = intel_primary_plane_set_property
> };
>
> static struct drm_plane *intel_primary_plane_create(struct drm_device *dev,
> @@ -11335,6 +11405,7 @@ static struct drm_plane *intel_primary_plane_create(struct drm_device *dev,
> {
> struct intel_plane *primary;
> const uint32_t *intel_primary_formats;
> + struct drm_i915_private *dev_priv = dev->dev_private;
> int num_formats;

Here and elsewhere, you're adding dev_priv to remove it in the next
patch. A left over from putting the rotation property in drm_plane.

--
Damien