[PATCH 2/2] drm/etnaviv: fix power register offset on GC300

[Doug Brown <doug@schmorgal.com>]

Older GC300 revisions have their power registers at an offset of 0x200
rather than 0x100.

Signed-off-by: Doug Brown <doug@schmorgal.com>
---
 drivers/gpu/drm/etnaviv/etnaviv_gpu.h | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.h b/drivers/gpu/drm/etnaviv/etnaviv_gpu.h
index 85eddd492774..b375612df862 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.h
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.h
@@ -10,6 +10,8 @@
 #include "etnaviv_gem.h"
 #include "etnaviv_mmu.h"
 #include "etnaviv_drv.h"
+#include "common.xml.h"
+#include "state_hi.xml.h"
 
 struct etnaviv_gem_submit;
 struct etnaviv_vram_mapping;
@@ -149,14 +151,24 @@ struct etnaviv_gpu {
 	unsigned long base_rate_shader;
 };
 
+static inline u32 gpu_fix_reg_address(struct etnaviv_gpu *gpu, u32 reg)
+{
+	/* Power registers in GC300 < 2.0 are offset by 0x100 */
+	if (reg >= VIVS_PM_POWER_CONTROLS && reg <= VIVS_PM_PULSE_EATER &&
+	    gpu->identity.model == chipModel_GC300 &&
+	    gpu->identity.revision < 0x2000)
+		reg += 0x100;
+	return reg;
+}
+
 static inline void gpu_write(struct etnaviv_gpu *gpu, u32 reg, u32 data)
 {
-	writel(data, gpu->mmio + reg);
+	writel(data, gpu->mmio + gpu_fix_reg_address(gpu, reg));
 }
 
 static inline u32 gpu_read(struct etnaviv_gpu *gpu, u32 reg)
 {
-	return readl(gpu->mmio + reg);
+	return readl(gpu->mmio + gpu_fix_reg_address(gpu, reg));
 }
 
 int etnaviv_gpu_get_param(struct etnaviv_gpu *gpu, u32 param, u64 *value);
-- 
2.25.1