Enables getting correct mode clock when reading pipe config
Signed-off-by: Furquan Shaikh furquan@google.com --- drivers/gpu/drm/i915/intel_ddi.c | 8 ++++++++ drivers/gpu/drm/i915/intel_display.c | 9 ++++++++- 2 files changed, 16 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c index 931b4bb..fa0af9b 100644 --- a/drivers/gpu/drm/i915/intel_ddi.c +++ b/drivers/gpu/drm/i915/intel_ddi.c @@ -1269,6 +1269,7 @@ static void intel_ddi_get_config(struct intel_encoder *encoder, struct drm_i915_private *dev_priv = encoder->base.dev->dev_private; struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc); enum transcoder cpu_transcoder = intel_crtc->config.cpu_transcoder; + int port = intel_ddi_get_encoder_port(encoder); u32 temp, flags = 0;
temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder)); @@ -1282,6 +1283,13 @@ static void intel_ddi_get_config(struct intel_encoder *encoder, flags |= DRM_MODE_FLAG_NVSYNC;
pipe_config->adjusted_mode.flags |= flags; + + if (port == PORT_A) { + if ((I915_READ(DP_A) & DP_PLL_FREQ_MASK) == DP_PLL_FREQ_160MHZ) + pipe_config->port_clock = 162000; + else + pipe_config->port_clock = 270000; + } }
static void intel_ddi_destroy(struct drm_encoder *encoder) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 3e66f05..681c99a 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -7176,6 +7176,8 @@ static void i9xx_crtc_clock_get(struct intel_crtc *crtc, pipe_config->pixel_multiplier; }
+#define div_ceil(A, B) ((A)/(B) + ((A)%(B) ? 1 : 0)) + static void ironlake_crtc_clock_get(struct intel_crtc *crtc, struct intel_crtc_config *pipe_config) { @@ -7218,7 +7220,11 @@ static void ironlake_crtc_clock_get(struct intel_crtc *crtc, return;
clock = ((u64)link_m * (u64)link_freq * (u64)repeat); - do_div(clock, link_n); + /* This is required because the value comes out to be in fraction + (eg. 70699.54). Need to round it up since values are compared in + drm_mode_equal + */ + clock = div_ceil(clock, link_n);
pipe_config->adjusted_mode.clock = clock; } @@ -9588,6 +9594,7 @@ static void intel_init_display(struct drm_device *dev)
if (HAS_DDI(dev)) { dev_priv->display.get_pipe_config = haswell_get_pipe_config; + dev_priv->display.get_clock = ironlake_crtc_clock_get; dev_priv->display.crtc_mode_set = haswell_crtc_mode_set; dev_priv->display.crtc_enable = haswell_crtc_enable; dev_priv->display.crtc_disable = haswell_crtc_disable;
On Thu, Aug 01, 2013 at 02:12:22PM -0700, Furquan Shaikh wrote:
Enables getting correct mode clock when reading pipe config
Signed-off-by: Furquan Shaikh furquan@google.com
drivers/gpu/drm/i915/intel_ddi.c | 8 ++++++++ drivers/gpu/drm/i915/intel_display.c | 9 ++++++++- 2 files changed, 16 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c index 931b4bb..fa0af9b 100644 --- a/drivers/gpu/drm/i915/intel_ddi.c +++ b/drivers/gpu/drm/i915/intel_ddi.c @@ -1269,6 +1269,7 @@ static void intel_ddi_get_config(struct intel_encoder *encoder, struct drm_i915_private *dev_priv = encoder->base.dev->dev_private; struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc); enum transcoder cpu_transcoder = intel_crtc->config.cpu_transcoder;
int port = intel_ddi_get_encoder_port(encoder); u32 temp, flags = 0;
temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));
@@ -1282,6 +1283,13 @@ static void intel_ddi_get_config(struct intel_encoder *encoder, flags |= DRM_MODE_FLAG_NVSYNC;
pipe_config->adjusted_mode.flags |= flags;
- if (port == PORT_A) {
if ((I915_READ(DP_A) & DP_PLL_FREQ_MASK) == DP_PLL_FREQ_160MHZ)pipe_config->port_clock = 162000;elsepipe_config->port_clock = 270000;- }
I don't think this works correctly since for DP we have new clocks on haswell, see intel_ddi_pll_mode_set. Also I think it'd be good to go right ahead and implement clock readout support for all hsw clock sources, not just DP. -Daniel
}
static void intel_ddi_destroy(struct drm_encoder *encoder) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 3e66f05..681c99a 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -7176,6 +7176,8 @@ static void i9xx_crtc_clock_get(struct intel_crtc *crtc, pipe_config->pixel_multiplier; }
+#define div_ceil(A, B) ((A)/(B) + ((A)%(B) ? 1 : 0))
static void ironlake_crtc_clock_get(struct intel_crtc *crtc, struct intel_crtc_config *pipe_config) { @@ -7218,7 +7220,11 @@ static void ironlake_crtc_clock_get(struct intel_crtc *crtc, return;
clock = ((u64)link_m * (u64)link_freq * (u64)repeat);
- do_div(clock, link_n);
/* This is required because the value comes out to be in fraction
(eg. 70699.54). Need to round it up since values are compared indrm_mode_equal*/
clock = div_ceil(clock, link_n);
pipe_config->adjusted_mode.clock = clock;
} @@ -9588,6 +9594,7 @@ static void intel_init_display(struct drm_device *dev)
if (HAS_DDI(dev)) { dev_priv->display.get_pipe_config = haswell_get_pipe_config;
dev_priv->display.get_clock = ironlake_crtc_clock_get;-- 1.8.3
dri-devel mailing list dri-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/dri-devel
We tested the submitted patch on several systems here and it seems to be working fine. So, I'm not sure I understand your comment. Can you please provide more details?
Thanks, Furquan
On Mon, Aug 5, 2013 at 12:24 AM, Daniel Vetter daniel@ffwll.ch wrote:
On Thu, Aug 01, 2013 at 02:12:22PM -0700, Furquan Shaikh wrote:
Enables getting correct mode clock when reading pipe config
Signed-off-by: Furquan Shaikh furquan@google.com
drivers/gpu/drm/i915/intel_ddi.c | 8 ++++++++ drivers/gpu/drm/i915/intel_display.c | 9 ++++++++- 2 files changed, 16 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/intel_ddi.c
b/drivers/gpu/drm/i915/intel_ddi.c
index 931b4bb..fa0af9b 100644 --- a/drivers/gpu/drm/i915/intel_ddi.c +++ b/drivers/gpu/drm/i915/intel_ddi.c @@ -1269,6 +1269,7 @@ static void intel_ddi_get_config(struct
intel_encoder *encoder,
struct drm_i915_private *dev_priv = encoder->base.dev->dev_private; struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc); enum transcoder cpu_transcoder = intel_crtc->config.cpu_transcoder;
int port = intel_ddi_get_encoder_port(encoder); u32 temp, flags = 0; temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));@@ -1282,6 +1283,13 @@ static void intel_ddi_get_config(struct
intel_encoder *encoder,
flags |= DRM_MODE_FLAG_NVSYNC; pipe_config->adjusted_mode.flags |= flags;
if (port == PORT_A) {if ((I915_READ(DP_A) & DP_PLL_FREQ_MASK) ==DP_PLL_FREQ_160MHZ)
pipe_config->port_clock = 162000;elsepipe_config->port_clock = 270000;}I don't think this works correctly since for DP we have new clocks on haswell, see intel_ddi_pll_mode_set. Also I think it'd be good to go right ahead and implement clock readout support for all hsw clock sources, not just DP. -Daniel
}
static void intel_ddi_destroy(struct drm_encoder *encoder) diff --git a/drivers/gpu/drm/i915/intel_display.c
b/drivers/gpu/drm/i915/intel_display.c
index 3e66f05..681c99a 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -7176,6 +7176,8 @@ static void i9xx_crtc_clock_get(struct intel_crtc
*crtc,
pipe_config->pixel_multiplier;}
+#define div_ceil(A, B) ((A)/(B) + ((A)%(B) ? 1 : 0))
static void ironlake_crtc_clock_get(struct intel_crtc *crtc, struct intel_crtc_config *pipe_config) { @@ -7218,7 +7220,11 @@ static void ironlake_crtc_clock_get(struct
intel_crtc *crtc,
return; clock = ((u64)link_m * (u64)link_freq * (u64)repeat);
do_div(clock, link_n);
/* This is required because the value comes out to be in fraction(eg. 70699.54). Need to round it up since values are compared indrm_mode_equal*/clock = div_ceil(clock, link_n); pipe_config->adjusted_mode.clock = clock;} @@ -9588,6 +9594,7 @@ static void intel_init_display(struct drm_device
*dev)
if (HAS_DDI(dev)) { dev_priv->display.get_pipe_config =haswell_get_pipe_config;
dev_priv->display.get_clock = ironlake_crtc_clock_get; dev_priv->display.crtc_mode_set = haswell_crtc_mode_set; dev_priv->display.crtc_enable = haswell_crtc_enable; dev_priv->display.crtc_disable = haswell_crtc_disable;-- 1.8.3
dri-devel mailing list dri-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/dri-devel
-- Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch
On 05/08/2013 22:24, Furquan Shaikh wrote:
We tested the submitted patch on several systems here and it seems to be working fine. So, I'm not sure I understand your comment. Can you please provide more details?
You check for the bit DP_PLL_FREQ_160MHZ in the register DP_A when calculating the reference frequence for port A eDP panels (i.e. the assignement of pipe_config->port_clock). This bit is valid on port A for ivb, snb & ilk, but not on hsw. Haswell has a complete new way for assigning the pll to the port. For solid fastboot support I think we need to support them all (i.e. also the hdmi wrpll clocks and while at it we might as well write the fdi dotclock readout code, it should be almost the same as the DP dotclock computation). -Daniel
Thanks, Furquan
On Mon, Aug 5, 2013 at 12:24 AM, Daniel Vetter <daniel@ffwll.ch mailto:daniel@ffwll.ch> wrote:
On Thu, Aug 01, 2013 at 02:12:22PM -0700, Furquan Shaikh wrote: > Enables getting correct mode clock when reading pipe config > > Signed-off-by: Furquan Shaikh <furquan@google.com <mailto:furquan@google.com>> > --- > drivers/gpu/drm/i915/intel_ddi.c | 8 ++++++++ > drivers/gpu/drm/i915/intel_display.c | 9 ++++++++- > 2 files changed, 16 insertions(+), 1 deletion(-) > > diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c > index 931b4bb..fa0af9b 100644 > --- a/drivers/gpu/drm/i915/intel_ddi.c > +++ b/drivers/gpu/drm/i915/intel_ddi.c > @@ -1269,6 +1269,7 @@ static void intel_ddi_get_config(struct intel_encoder *encoder, > struct drm_i915_private *dev_priv = encoder->base.dev->dev_private; > struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc); > enum transcoder cpu_transcoder = intel_crtc->config.cpu_transcoder; > + int port = intel_ddi_get_encoder_port(encoder); > u32 temp, flags = 0; > > temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder)); > @@ -1282,6 +1283,13 @@ static void intel_ddi_get_config(struct intel_encoder *encoder, > flags |= DRM_MODE_FLAG_NVSYNC; > > pipe_config->adjusted_mode.flags |= flags; > + > + if (port == PORT_A) { > + if ((I915_READ(DP_A) & DP_PLL_FREQ_MASK) == DP_PLL_FREQ_160MHZ) > + pipe_config->port_clock = 162000; > + else > + pipe_config->port_clock = 270000; > + } I don't think this works correctly since for DP we have new clocks on haswell, see intel_ddi_pll_mode_set. Also I think it'd be good to go right ahead and implement clock readout support for all hsw clock sources, not just DP. -Daniel > } > > static void intel_ddi_destroy(struct drm_encoder *encoder) > diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c > index 3e66f05..681c99a 100644 > --- a/drivers/gpu/drm/i915/intel_display.c > +++ b/drivers/gpu/drm/i915/intel_display.c > @@ -7176,6 +7176,8 @@ static void i9xx_crtc_clock_get(struct intel_crtc *crtc, > pipe_config->pixel_multiplier; > } > > +#define div_ceil(A, B) ((A)/(B) + ((A)%(B) ? 1 : 0)) > + > static void ironlake_crtc_clock_get(struct intel_crtc *crtc, > struct intel_crtc_config *pipe_config) > { > @@ -7218,7 +7220,11 @@ static void ironlake_crtc_clock_get(struct intel_crtc *crtc, > return; > > clock = ((u64)link_m * (u64)link_freq * (u64)repeat); > - do_div(clock, link_n); > + /* This is required because the value comes out to be in fraction > + (eg. 70699.54). Need to round it up since values are compared in > + drm_mode_equal > + */ > + clock = div_ceil(clock, link_n); > > pipe_config->adjusted_mode.clock = clock; > } > @@ -9588,6 +9594,7 @@ static void intel_init_display(struct drm_device *dev) > > if (HAS_DDI(dev)) { > dev_priv->display.get_pipe_config = haswell_get_pipe_config; > + dev_priv->display.get_clock = ironlake_crtc_clock_get; > dev_priv->display.crtc_mode_set = haswell_crtc_mode_set; > dev_priv->display.crtc_enable = haswell_crtc_enable; > dev_priv->display.crtc_disable = haswell_crtc_disable; > -- > 1.8.3 > > _______________________________________________ > dri-devel mailing list > dri-devel@lists.freedesktop.org <mailto:dri-devel@lists.freedesktop.org> > http://lists.freedesktop.org/mailman/listinfo/dri-devel -- Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 <tel:%2B41%20%280%29%2079%20365%2057%2048> - http://blog.ffwll.ch
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On Mon, Aug 05, 2013 at 01:24:15PM -0700, Furquan Shaikh wrote:
We tested the submitted patch on several systems here and it seems to be working fine. So, I'm not sure I understand your comment. Can you please provide more details?
You check for the bit DP_PLL_FREQ_160MHZ in the register DP_A when calculating the reference frequence for port A eDP panels (i.e. the assignement of pipe_config->port_clock). This bit is valid on port A for ivb, snb & ilk, but not on hsw. Haswell has a complete new way for assigning the pll to the port. For solid fastboot support I think we need to support them all (i.e. also the hdmi wrpll clocks and while at it we might as well write the fdi dotclock readout code, it should be almost the same as the DP dotclock computation). -Daniel
Thanks, Furquan
On Mon, Aug 5, 2013 at 12:24 AM, Daniel Vetter daniel@ffwll.ch wrote:
On Thu, Aug 01, 2013 at 02:12:22PM -0700, Furquan Shaikh wrote:
Enables getting correct mode clock when reading pipe config
Signed-off-by: Furquan Shaikh furquan@google.com
drivers/gpu/drm/i915/intel_ddi.c | 8 ++++++++ drivers/gpu/drm/i915/intel_display.c | 9 ++++++++- 2 files changed, 16 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/intel_ddi.c
b/drivers/gpu/drm/i915/intel_ddi.c
index 931b4bb..fa0af9b 100644 --- a/drivers/gpu/drm/i915/intel_ddi.c +++ b/drivers/gpu/drm/i915/intel_ddi.c @@ -1269,6 +1269,7 @@ static void intel_ddi_get_config(struct
intel_encoder *encoder,
struct drm_i915_private *dev_priv = encoder->base.dev->dev_private; struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc); enum transcoder cpu_transcoder = intel_crtc->config.cpu_transcoder;
int port = intel_ddi_get_encoder_port(encoder); u32 temp, flags = 0; temp = I915_READ(TRANS_DDI_FUNC_CTL(cpu_transcoder));@@ -1282,6 +1283,13 @@ static void intel_ddi_get_config(struct
intel_encoder *encoder,
flags |= DRM_MODE_FLAG_NVSYNC; pipe_config->adjusted_mode.flags |= flags;
if (port == PORT_A) {if ((I915_READ(DP_A) & DP_PLL_FREQ_MASK) ==DP_PLL_FREQ_160MHZ)
pipe_config->port_clock = 162000;elsepipe_config->port_clock = 270000;}I don't think this works correctly since for DP we have new clocks on haswell, see intel_ddi_pll_mode_set. Also I think it'd be good to go right ahead and implement clock readout support for all hsw clock sources, not just DP. -Daniel
}
static void intel_ddi_destroy(struct drm_encoder *encoder) diff --git a/drivers/gpu/drm/i915/intel_display.c
b/drivers/gpu/drm/i915/intel_display.c
index 3e66f05..681c99a 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -7176,6 +7176,8 @@ static void i9xx_crtc_clock_get(struct intel_crtc
*crtc,
pipe_config->pixel_multiplier;}
+#define div_ceil(A, B) ((A)/(B) + ((A)%(B) ? 1 : 0))
static void ironlake_crtc_clock_get(struct intel_crtc *crtc, struct intel_crtc_config *pipe_config) { @@ -7218,7 +7220,11 @@ static void ironlake_crtc_clock_get(struct
intel_crtc *crtc,
return; clock = ((u64)link_m * (u64)link_freq * (u64)repeat);
do_div(clock, link_n);
/* This is required because the value comes out to be in fraction(eg. 70699.54). Need to round it up since values are compared indrm_mode_equal*/clock = div_ceil(clock, link_n); pipe_config->adjusted_mode.clock = clock;} @@ -9588,6 +9594,7 @@ static void intel_init_display(struct drm_device
*dev)
if (HAS_DDI(dev)) { dev_priv->display.get_pipe_config =haswell_get_pipe_config;
dev_priv->display.get_clock = ironlake_crtc_clock_get; dev_priv->display.crtc_mode_set = haswell_crtc_mode_set; dev_priv->display.crtc_enable = haswell_crtc_enable; dev_priv->display.crtc_disable = haswell_crtc_disable;-- 1.8.3
dri-devel mailing list dri-devel@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/dri-devel
-- Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch
Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx
On Thu, 1 Aug 2013 14:12:22 -0700 Furquan Shaikh furquan@google.com wrote:
@@ -1282,6 +1283,13 @@ static void intel_ddi_get_config(struct intel_encoder *encoder, flags |= DRM_MODE_FLAG_NVSYNC;
pipe_config->adjusted_mode.flags |= flags;
- if (port == PORT_A) {
if ((I915_READ(DP_A) & DP_PLL_FREQ_MASK) == DP_PLL_FREQ_160MHZ)pipe_config->port_clock = 162000;elsepipe_config->port_clock = 270000;- }
Sorry Furquan, I should have checked this earlier, I knew it was too good to be true. :)
On HSW, DP_A is actually DDI_BUF_CTL, and it has a different layout than the old DP_A reg. Like Daniel said, doing it the old way is invalid on HSW. It might work in your configs, but I think that's just coincidence, since bit 16 is the port reversal bit on HSW, not the clock freq.
To get the clock freq, you need to look at 0x45020 to find the refclk, then look at the WRPLL_CTL for the pipe to get the dividers. That's what Daniel meant when he asked for a full "clock_get" function. It's only a little more complicated, but you'll need docs for it. Charlie Huang ought to be able to get you the NDA docs that should have the info you need.
Thanks,
dri-devel@lists.freedesktop.org
-
Daniel Vetter -
Daniel Vetter -
Furquan Shaikh -
Jesse Barnes