drm/radeon/kms/atom: add support for AdjustDisplayPll
DCE3+ has an AdjustDisplayPll that will adjust the pixel
clock accordingly based on the encoder/transmitter to
handle special hw requirements.
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c
index 0a5082a..d5e6f3d 100644
--- a/drivers/gpu/drm/radeon/atombios_crtc.c
+++ b/drivers/gpu/drm/radeon/atombios_crtc.c
@@ -333,12 +333,13 @@
struct drm_encoder *encoder = NULL;
struct radeon_encoder *radeon_encoder = NULL;
uint8_t frev, crev;
- int index = GetIndexIntoMasterTable(COMMAND, SetPixelClock);
+ int index;
SET_PIXEL_CLOCK_PS_ALLOCATION args;
PIXEL_CLOCK_PARAMETERS *spc1_ptr;
PIXEL_CLOCK_PARAMETERS_V2 *spc2_ptr;
PIXEL_CLOCK_PARAMETERS_V3 *spc3_ptr;
- uint32_t sclock = mode->clock;
+ uint32_t pll_clock = mode->clock;
+ uint32_t adjusted_clock;
uint32_t ref_div = 0, fb_div = 0, frac_fb_div = 0, post_div = 0;
struct radeon_pll *pll;
int pll_flags = 0;
@@ -393,12 +394,34 @@
}
}
+ /* DCE3+ has an AdjustDisplayPll that will adjust the pixel clock
+ * accordingly based on the encoder/transmitter to work around
+ * special hw requirements.
+ */
+ if (ASIC_IS_DCE3(rdev)) {
+ ADJUST_DISPLAY_PLL_PS_ALLOCATION adjust_pll_args;
+
+ if (!encoder)
+ return;
+
+ memset(&adjust_pll_args, 0, sizeof(adjust_pll_args));
+ adjust_pll_args.usPixelClock = cpu_to_le16(mode->clock / 10);
+ adjust_pll_args.ucTransmitterID = radeon_encoder->encoder_id;
+ adjust_pll_args.ucEncodeMode = atombios_get_encoder_mode(encoder);
+
+ index = GetIndexIntoMasterTable(COMMAND, AdjustDisplayPll);
+ atom_execute_table(rdev->mode_info.atom_context,
+ index, (uint32_t *)&adjust_pll_args);
+ adjusted_clock = le16_to_cpu(adjust_pll_args.usPixelClock) * 10;
+ } else
+ adjusted_clock = mode->clock;
+
if (radeon_crtc->crtc_id == 0)
pll = &rdev->clock.p1pll;
else
pll = &rdev->clock.p2pll;
- radeon_compute_pll(pll, mode->clock, &sclock, &fb_div, &frac_fb_div,
+ radeon_compute_pll(pll, adjusted_clock, &pll_clock, &fb_div, &frac_fb_div,
&ref_div, &post_div, pll_flags);
atom_parse_cmd_header(rdev->mode_info.atom_context, index, &frev,
@@ -409,7 +432,7 @@
switch (crev) {
case 1:
spc1_ptr = (PIXEL_CLOCK_PARAMETERS *) & args.sPCLKInput;
- spc1_ptr->usPixelClock = cpu_to_le16(sclock);
+ spc1_ptr->usPixelClock = cpu_to_le16(mode->clock / 10);
spc1_ptr->usRefDiv = cpu_to_le16(ref_div);
spc1_ptr->usFbDiv = cpu_to_le16(fb_div);
spc1_ptr->ucFracFbDiv = frac_fb_div;
@@ -422,7 +445,7 @@
case 2:
spc2_ptr =
(PIXEL_CLOCK_PARAMETERS_V2 *) & args.sPCLKInput;
- spc2_ptr->usPixelClock = cpu_to_le16(sclock);
+ spc2_ptr->usPixelClock = cpu_to_le16(mode->clock / 10);
spc2_ptr->usRefDiv = cpu_to_le16(ref_div);
spc2_ptr->usFbDiv = cpu_to_le16(fb_div);
spc2_ptr->ucFracFbDiv = frac_fb_div;
@@ -437,7 +460,7 @@
return;
spc3_ptr =
(PIXEL_CLOCK_PARAMETERS_V3 *) & args.sPCLKInput;
- spc3_ptr->usPixelClock = cpu_to_le16(sclock);
+ spc3_ptr->usPixelClock = cpu_to_le16(mode->clock / 10);
spc3_ptr->usRefDiv = cpu_to_le16(ref_div);
spc3_ptr->usFbDiv = cpu_to_le16(fb_div);
spc3_ptr->ucFracFbDiv = frac_fb_div;
@@ -460,6 +483,7 @@
}
printk("executing set pll\n");
+ index = GetIndexIntoMasterTable(COMMAND, SetPixelClock);
atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args);
}